[1 table d. - utkweb.eecs.utk.edu/~jsl/ece325/ece325-labmanual.pdflab #2 load-speed characteristic...

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D [1 D. ,0. U ,. o ' : ..;. D r-, ""t'r ..:: " . . I- 't.J. ': "ot ' "-.;.' o Table of Contents ,- ' Lab "fib Schedule' Lab"itt Voltage Regulation ofa Single Phase'Transfonner Lab Handout Wning Diagram Lab #2 Load-Speed Characteristic of a DC Motor Lab Handout Part AoWning Diagram Part B'WiringDiagram , Lab-.fI3·AC Indnttion" Motor Perfonnanre "Lab Handout,' .. . ' ... Lab #4 SynchronQus'MQtQr' .'. : ... .... :. 0 Lab Handout .. ..0· .• 0:0 -•••• " Part A Wuing Part B Wuing Diagram .. : .e. : Operating for lAb EWiiWnem 'Standard Machines WRM-lDO-3A Wound-RotorMotor Special Machines lOG '" SM-l00-3A Synchronous Machine DM-1OOA DCMachine 1 2 3 4 5 8 9 10 13 14 ' 16 17 A-6 B-1 B-2 r- a.,_, . 0

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Page 1: [1 Table D. - UTKweb.eecs.utk.edu/~jsl/ECE325/ECE325-LabManual.pdfLab #2 Load-Speed Characteristic of a DC Motor . Objective . The objective of . this . lab is to . detennine the load-speed

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Table of Contents

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Lab Guide~es

fib Schedule

Labitt Voltage Regulation ofa Single PhaseTransfonner

Lab Handout

WningDiagram

Lab 2 Load-Speed Characteristic of a DC Motor

Lab Handout Part AoWning Diagram Part BWiringDiagram

Lab-fI3middotAC IndnttionMotorPerfonnanre

Lab Handout

WuingDia~middot

Lab 4 SynchronQusMQtQr

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Lab Handout 0middot bull 00 -bullbullbullbull

Part AWuing ~gram

Part B WuingDiagram ~

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Operating In~etion~ for lAb EWiiWnem

Standard Machines

WRM-lDO-3A Wound-RotorMotor

Special Machines

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SM-l00-3A Synchronous Machine DM-1OOA DCMachine

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3 4

5 8 9

10 13

14 16 17

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B-1 B-2

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l Accessories ~

MGB-lOODO Bedplare C-l

Transformers I J

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- T~ 1OO-3A TraDsfonnerDemonstrator 03 i- Load Units

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RL-l00A RcsistanceLoad B-1L RLC-lOO Resistance~Reactancc Lead B-2middot

Meters ACVAOO AC Metering Panel F-2 t shy

ACWM~l00 WattmeterPanel F-4 DCVA-1m DC Metering Panel F-S

Mode11723 Bench Tachometer F-IO

Pow~ Supplies L BPS-l00-P-3 Power Panel 0-1j

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C Lab Guidelines

L Grading

1 Students~required to complete allfour labs Failure to complete the Cportofany of themiddot ~bsltWiII~sultm an incomplete

2 B~chlabmiddot~port willJjewOrth 30 points Two points will be deducted for each day late 3 The gra4iIig o~tl1~middotl8bswill be bas~ on the following in this order WoIkandca1culations

-f guidelmes alloveare followed easy to follow and read and presentation L

Lab Re~ReQuiyenments

L The~repqrtsDl1jst fucludethe following (mtbis order)

lQ)verpa~~cludingtitle course numb~rtstudent namcani date tmn~ in 2 IntroductiOnmiddot

r 3 Fte-La~question~and answers

4middot LabqD~Sti()l1S ~d 811SWers

5Com~of~cu1atedand experimental data (meaning tabularandemPhicalcigtmparison) j 6bull C()ncluslans~ shy

7 App~ndiX iricludinglAb handout wiring diagrams and Lab data sheets f middot L Be sure to la1lelaIl figures$lables~ and sections

Data PresentatioD

1bull Labelallgraphs with captions indicatingwhat the plotsrepresents 2~ Include labels for both axes

1 3 If there aretwoormltgtre graphs onthe same plot inclu~a legend-- 4 Label tabular data -c bull

SAlwaysmiddot specify units

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Before Lab Meeting 1 Lab Meeting 1

Before Lab Meeting 2 Lab Meeting 2

Before LabmiddotMeeting 3

Labmiddot Meeting 3

Before Lab Meeting 4

Lab Meeting 4

Before Lab Meeting 5

Lab Meeting S

Lab Schedule

Review the Lab Eq~ipment sheets in the back of the manueL Introduction to the Lab

Do Pre-Lab from ~ 1 Part AshyGet Pre-Lab checked off -Penonn experiment from the Lab Exercise

Write Lab 1 report Do Pre-Lab from-Lab 2 Dont forget Parts A amp-Bl Turn in Lab 1 repOrt Get Pre-Lab check~ off PerfOnn experiment from Lab 2 Lab Exercise

Wrlte~b 2 report Do Pre-Lab from Lab 3 TUm in Lab 2 report Get Pre-Lab-checked off

Perform experiment from Lab 3 Lab Exercise

Write Lab 3~

Do Pre-Lab frOriiLab 4 Turn in Lab 3 repon Get Pre-Lab Checked off

Perf~experiment from Lab 3 Lab Exercise Write ~ 4-rcport

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Lab 1 Voltage Regulation of a Single Phase Transformer

Objective

The objectiveof this lab is tocorrelate the calculatedvolmgeregulation ofa single phase

transformer with the regulation obServed in the laboratoryt and also to make general observations about transformers L

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The laboratory transfonncr is to be used as a 220110 volt transformer (see Figure 1) The series

impedance referred to the 220 volt si4e is approximately (24+j12)0lr

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Figure 1

1 State the voltage and current relaqonships of an ideal transformer t bull 2 List some reasons why real world transformers are not ideal-l

3 Define voltage regulation 4 Assuming a purely resistive lo~d calculate and plot the relationship between secondary

tenninal voltage (V2) and secondary currentmiddot(12) for a 220 voltprimary voltage (VI) and a

maximum secondary current (I2) of2 amps

5 Draw a circuit diagram showing how the relationship between secondary voltage and current can be measured in the laboratory Indicate sources variable loa~ voltmeters and ammeters

Lab Exercise

1 Connect the circuitfrom the Part ~ wiring diagram 2 Record enough readings ofV2 and 12 to compare with calculated values

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Calcul~tions and Comparisions

L 1 Compare the experimental andcal~ulated results 2 eaicul~ thevoltage~gUlatiQn 3 Why was the eXcitatiOn~chnoiincluded in the calculations Did neglecting this excitation

branch ca~e any problrJDSmiddot middot

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Lab 1 Wiring Diagram f L-

POVVER PANEL

0 0 0 0 0 12OVACtaoYAC 002401t~ AC4O-o4W ~AC At AI PAl bull oSOVDC bull sec PRJ bull UVDC bull sec

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l L Lab 2 Load-Speed Characteristic of a DC Motor

Objective

The objective of this lab is to detennine the load-speed characteristics ofa DC motor

rmiddot Part AL

1 The DC machine will be ron as a genetator at a constant speed- The armatureresistance (Ra) will 1 I bull -- becalculate4 to assist in plotting tbeSieed VSla annature current

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I Calculate a synchronous motors rotor speed (f=60 HzN=120fp) for a machirie with four poles and fora machine with six poles

2 Calculate the value afbaclc emf ltEa) fora DC motor (Ka~ = 6944e-2 VRPM) with arotor

speedof 1800RPM with a rotor speed of 1000 ~ and with a rotor speed of0 RPM 3 Draw a circuit dia~ ofaDC machine connected as a separately excited generator (show

~ -resistance indilctance and voltage the field inductance and resistance~d the variableresistive load) Show how to conneCt a voltmeter to measure armature voltage and bow to connectmiddota ammeter tome8sure annafure current

Laboratory Exercise

L Laboiatmy Setup

1 ConneCt the DC machine as a se~tely excited generator and connect the synchronous mac1rlneas a motor as shown in Lab 2 Part A Wning Diagram

2 Mechnica11y couple the two machineS so that the synchronous motor drives the DC generator 3 Set the synchronous-machine to IND STARTt

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4 TurD on the main AC power S Tmn the syncllronoDs machine field voltage (0-150 VDC) to position 3 6 Set the synchronousmachine to $YNCH RUN 7 Make sure the rotor speed is 1800RPM

Laboratoty Measurements

( 1 Measure open circuit armature voltage (back emf) and field cmrent as the DC machina field

1 voltage (D-l25VDc) is increased Use field current (If) increments of about 005 A and vary shy

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If up to 05A 2 Set tbeDCmachin~s fieldvoltage to a value ~atbrings the open circuit annature voltage to

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12SVL 3 Measure the anna~ current (Ialand ~ature vol~ge(Vagt as theresistive load is increased I bull

i Do not exceed an annatme current of2At Record eoughpofuts to ~phtheVa VS In L charaCteristicbull

1 I Ca1culatio~s~amp Questions1shy

1 Plot back emf versus fie1ilCUlTent L

2 Plot ~~ture tenninalvoltagc versus armature current

3 Calculai~ta va1~eforannatureresistance (Ra) from the slope ofVa vsIamiddot - ---~~ ~l 4 ~atPtPose does the synchronous machine serve fot Part A~

Part B

The DC ma9bine will be ron as a DC shunt moftr~ The sPee4vs armaturecurrentchara~tic

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will be mcas1Jtcd andplotted and the effectof anna~ reacnon will be evaluated

Pre~Lab

L 1 DraJithecircuitdiagram ofa DCmiddotshunt motor

1 1 2 Defihe annatitte reaction shy

3 CalcnlateKa~forVt=Ea=125V at 1800 RPMmiddot

4~ Develop a re1ationshipmiddotof speed as a funeti()11 ofannl-~ ~nt Use the values of Vt andL KaW from above and assume that annature reaction is negligible I L

Laboratory Exercise

2 I -- LabomtotySetup t

I i 1 Set the ()lS0 VDCknob to position 3

2 Set the synchronous machine to SYNCH RUNt l

3 Co~ecttbeDCma~hine asa shunt motor and the middotsynchronousmiddotm~hineas a 3-phase ACL

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generator as shownin Lab 2 PartBWiring DIagram 4 Connect the variable three~phase resistive load to the oU1put tenninals of the synchronous)

L machine The resistance of the load will be increased to place a mechanical load on the DC motor (drawing more current through the DC motors armature)

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Laboratory Measurements

1~ U~ouple the two machines 2 Turn on main power 3 Set the PC armature voltage (by using the ~12S VDCknob) to 12SV 4 Adjust~eDC machine field rheostat to obtain a no-load speed of 1800 RPM

s Measure annature voltage and ~ature current at no-load

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6 TUrn theO-l2S VDe knob down to stop the motor (leave the field rheostat as it was set) 7bull Couple the motor andthe gener8m 8 Tmn th~ 0-125 VDe knob up to increas~ armature voltageto 12SyenL 9 Incre~~ the load onthe synchronous gCIieratorbull For each 3-phase load switch record the

annature current and the speedJ L

Calculations 1

L 1 Calculate the power consumed by the DC machine at noload(no-16ad losses)

I 2 Plot speed versus ~ature cocrent (a) from claculatedvalnesusing Rafrom Part A andIa = 0 L- tolS A (b) using experimentaldatagathered in Part B CoIPpare the two plots

3 H themiddotvaIueof Kaclgt decreas~s withhigb~annature current how is the speed effected~

4 How could one explain the ttiffercncesbetween dle experimental and theoretical plots Shouldannature reaction be neglected Use figures andor m~strations to support your answer

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Lab 2P~~t A Wiring Diagram

PQVIER PANa

0 Omiddot 0 0 0 12fNNJ t2OVAC MAlHAC PAt bull ot5OVDC bull SEC PAl bull o12SVDO bull SEC 12OVAC~~W

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Lab 2 Part B Wiring Diagram

POWER PANEL I bull

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calculate the parameters ofan inductionmotorequivalent circUi~ and to compare the calculated values with measured values L

Pre-La))

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1 What are the two typeS ofrotOis used mAC inductlonmotorsl t 2 Give theequation for SYDchrono~ speed What is the synhronous speed for a four pole AC ~

L ~d-qctiltgtn~bine (standacent ~efrecFJe~) 3 Define slip for an induction motor If thesynchronous speed is 1800 RPM and the slip (s) is

L 001 what is the rotor speed Ifs == 011 -

l bull 4 Draw a power flow diagram for an AC induction ~otor

5~ middotmiddotDrawatorque VS~ sp~d curve for ail ACinduction motor What is the torqu~ prodnced at synchronous speed (Ns)

6 DescnDemiddot~ no-load test and the blocked rotor ~t for an induction motor Whatis the value ofslip for a Blocked ~otor Test

7 Draw the lEEE-recommended equivalent circuit~ shyL

Calculations C l

l Given the follow~g test results

fLj No-load test Line voltage= 210 V

Linecuxrent iO77 A

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Iiiputpower = 52 W L

I - Blocked-rotor test Line voltage ~ 60V shy tinecu1rent 17 AJ - shy

Input power == 100 W

Also given stator r~tance (Rl) =53 Wphase DL synchronous speed (COsyn) =1885 radlsec

L (R~ember that you are worldngwith a 3-phase machine)

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1 Calculate the parameters of the lEEE-~~ended equivalent circuit 2 Calculate the induction motornopad rotational Io~ 3 CalculateI2t I1t PF Fin Ptiutt Eff and ToutfQrslip v~ues fa11ging from 0 to O~l (with

L step siZe 001) (Pont =Pmech - Prot and Tout = Tmechgt

3 ~lot outputtorque versus speed ~ 4 Plot power factof versusoutput powe~ 5 piot AC)ine current versus outpu~power

i 6 it Plot efficiency versus outPut pow~ shy

LabormiddotatorY Exercise LabgratolY Setup

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L 1 S~tUP middottheOC machine as a sep~te1y excited generator with variableresistance load bank andthe wo~drotot motor as an indu~on motor to drivemiddotthe DC generator (Connect the

indu~Otimotorstatotwindirigsfu a delta confi8uration) This is shown in the Lab 3 Wiring Diagrallt ~

3 CQ~tXtawattmetet to measure power into the itlductionmotor 4 CoDnectDC meters tomeasure DC generator ~nniDalvoltage and armature current 5 Connect AC ~terStOmeasweline to neutral voltage and line current

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- Laboratoxy Me~ments

J 1 Mechanically conple the induction motor to the DC generator-

2 Bring the 3-phase AC voltage to 120V (line to n~tral) ~ I

i 3 Whenmiddotthe induction mot-or is running (around 1783 RPM) bring the nmiddotc machine terminal ~ ~ ~oi~ uP to 125 V middot

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(lOt andp~~rofone_p~e (WI)bull middot 5 RCCC~d DC generator values values ofvoltage at terminal (VVand armature current (Ia)

6 First take a set ofmeasurements with all the resistance switches off 1 middotTheD continuerecordingmiddotas theJoad is increased up to ACmiddotllne current of 15 A Do not

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CalctilationS

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~ 1 Calculate values for Pin Pout PF Eff~ atidTout

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l PF= WI (Vt(l-n) II)

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f 2 Plot ()utput torgue versus speed ( L- 3 Plotp01l-er fa~torve~u~middot outp~tpoer

4 Plot AC line current v~~outputpower f 5~i Plot~fficl~ncy verSusoutputPQwer L 6 Con1p~ethe ~resu1ts wi~thecalcu1ated results 7 CommeIJton the wisdom ofbuying an indu~on motor having a signijican~ygreaterporse i L power ra~g than iSrequiiedmiddot to dothejob~

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Lab 3 Wiring Diagram

PONERPANa

0 0 0 0 0 120VAC ~laquoNAD4O-4W 12OVoAC MAINC PAl bull o-1atNDC - SEC PAL bull 00121VDC bull SEC 12OVAC

0 ~ 0 0 GJ EJ []] 0 GJ ~ 0 ~ 0

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La) 4 Synchronous Motor

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L Objective

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L The objective of ~ lab is tomiddotexamine the terminal characteristics ofa synchronous motor under - I08(fand no-load conditions

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Pre-Lab

i - L 1 Whatisan important feature ofsynchronous motors

~ Dra~ariequivalentcircuit modetfor a synclnypousmotor ShowEf Xs Ra Iat~Vt If and

the fiel~winding 3 Descripe the open-eircuit test ~t is measured What is varied Sketch the circuit 4 Descn1le the short-circuit test Mat is measured What is varied Sketch the circuit 5 Sketehatt open~ircuit ch8rac~riStic aDd a short-circuit charac~eriStic Show Ia (rated) Vt

(rated) a11da modified airgaplineL

Laboratory Exercise f Part A L

The open-circuit and short-circuit tests will be performed to determine values f~r Xs and ~using

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the synchronous machine as a generator

Procedure

1 ~ Connect the DC machine as a selfexcited shunt generator 88 shown in Lab 4 Part A ~g

diagram

2 ~ Couple the DC machine to the syn6~nous machine f 3 Set the 0-125 VDCbob to zeromiddot L

4 Set the 0-150 VDC kn~b to zero 5 Set the synchron~us mac~e to INn START e

6 Bring the DC~cbine terminal voltage up to 125 Vt and adjust the field rheostat to obtain a speed of 1800~M

7 Set the sYnchronous machine to SYNCH RUN 8 Perform the open-circuit test With the synchronous machines terminals open measure the

( voltage across the windings (V00) as field current (If) in increased Increase the field current t - by increasing the DC voltage across the field winding Vary If from 0 to lA in increments of

l 9 OlA Set If to zero

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10 Perform the short-circuit test Short the ph~ windings of the synchronous machine and put

i i an ammeter in series with the shorted windings Measuremiddotthe average windingcurrent (Isc) as L

If in increased V~If from 0 to lA in increments ofOlA ( t

i L- Calculations

1 4~middotVt = Voc =120middotVcaJ~ulatcentmiddotXs and K(Xs =Voc IIsc andK= Voc I If)

2 P16tIIalvs If~(IIal =1Vt--KIf) I Xsi ) t L Part Bmiddot L The annatuIecurrentwill be measured agfield current is varied under loadmiddot and no loadconc1itions

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1 Connectfh~sySte~ as sbownin the Lab 4 Part Bwiring diagram but do not couple the syn~~riq~-~tiinetothe DC machine~

2 Senhe~chronousmac~to lND STARr 3 Thin tbe6-1S0vnpknobto position cO5~

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( S S~ the synclnpnbusmachine tq ~YNCH RUN The motor speed should be 1800 RPM L 6 MeasureIa andItas If is varief1 up to lA

Load Procedure shy

1 TUm offmain power 2 Mechanically couplethe synchronous machine to the DC ~hine

3 Set~~ first nine switches of the resistance load to ON ) 4 Setthe-~chrononsmachine to lND START L

5 Turno~middot-m~~wer

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1~ 6 Tuni the~o-lS0VDCknob to position 20bull

~ 7 Settheo-l25VDCknobtoposition pound9 tbull

8 Set the synchronous machine to SYNCH RUN The motor speed should be at 1800 RPM 9bull Measure Ia and Ifas Ifis varied up to lA

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Calculations L

1 Plot Ia V8 If for load and no load conditions and compare with c~cu1ated graph

2 Is there a best~fieldcurrent at which the synchronous machine should be operated

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Lab 4 ~art A Wiring Diagram

POWER PANEL

middot0 0 o o PAl bull Ql25VOC bull sec 120VAC120VAO 0--240114OVACJJ44W 120VAC

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i -- Lab 4 ~Part B Wiring Diagram

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SERI~S100 OPERATINGINSTRUCTIONS amp bull ~

MODEL WRM-100-3A WOUND-ROTOR MOTOR

GENERAL The WRY-100-SA is a three-phase four pole wound-rotor motorconsisting of a stator winding and a rotor winding withldip rings and brushes A three-pole

~ circuit breaker ~ also provided in the termm81 box The nominal ratings of the motor ari~ circuit breaker are listed below r

1 J l-- SPECIFICATIONS MOTORL

WmdingTypeshy Wound Btafor amp Rotor Horsepower shy 13HP Speed shy 175QRPM Voltage bull 20SV bull Sf Amiddot or 860V-s+Y

I Frequency- 60Hz L- Rating Continuous

Full Load Current bull 17 Amps

CIRCUIT BREAKER

Type of Operator bull Rocker Switch L No of PoleS bull Three

Overload )pe bull Thermal Trip Rating shy 2DAmpS Reset Method - middotOW- to Reset

r I - shy OPERATION To operatethe ~-l00-SAas an induction motor make the connections shown

in Figure L Rotate the Wound Rotor Speed Control ~b to the maximum resisshytance fttn~ counterclockwise direction With all th~ ~ce in the rotor cir middotcai~ the motor-willdevelop maxirilum starting torque and minimum ~g curshy

rent Pwih up the rocker switch on the circuit breaker~ startmiddottqemotorbull The motor will accelerateup to speed The rheostat providesthe mSansofv~g theL motors lQieedtorque characteristicS The effect of the rlieostat increUes with increasing load onthe motorr ~

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- - FNGINEERING CORPORATION L L- ----MANufACTUReRS OF EQUJPMNT OR EDUCATtON ANDINDUSTRY bull

Po Box 563 East Longmeadow MA 01028 (413) 525middot3981 bull (800) 253middot2133 bull Pax (41SlS2S-4141

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ENGfNEERING CORPORATION ------- MANUFACTURERS 01= EQUIPMENT lOR EDUCATION AND INDUSTlY

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GENERAL

SPECIFICATIONS

middotMODEL SMmiddot100middot3ASYNCHRONOUS MACHINE

ThemiddotSMmiddotI00-8A is a three-phase four-pole machine consisting of a wyedel~ stashytor andmiddot 8 quadrature rotor having a DC field winding and a damper winding A three-pole circUit breaker and a IND START-BYNC RUN switch are provided in the terminal OOx- RatingS fonow

SM-100-3A MOTOR ampALTERNATOR

Speed - 1800 RPM Voltagemiddot Max Ambient Temp Insulation bull Rating bull

CIRCUIT BREAKER

Type of~tor shyNo ofPoles bull Overload Type bull Trip Rating bull Reset Methoa shy

ALTERNATOR

Power-Load Current bull Fielti Excitation shy

MOTOR

HorSepowershyCurrent bull Frequencyshy

208120V-B+-4W 4~ (1047) ClassmiddotB Continuous

Rocker Three Thermal L7amps

middot middotOFF to Reset

250 watts 07 amp (nominal) Separate L6 amps

18 HP 17 Amps 60Hz

ENGINEERING COAPORATION --~-MANUf~RpoundRS~ EQUIPMENT lOR EDUCATION ANO INDUSTRY

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OPERATION Th~ proper connections tor operation of th~ SMl00-SA ~ a ~clttonous (SYNCHRONOUS motor are shown in Figure middot1 With ~ ~tebin the SYNC RUNposiliou MOTOR) ~ze the vari~ble DC supply and adjusttbe~tput voltage from zero up to

th~ value which eauses 1 amp to flow through the rotor ~turn the switch to the lNDSTART PO$ition middotand Start the motor by toggling~becircuit breaker to

the ONposltion WJten the motor reaches DO lQad 1ij)eeC1 move the switch to the SYNC RUN posItion The rotor will then sYnchronize with the nn~ and fJ1e motor wiD be ti1mrlng at exactly 1800 RPvL Used to demonstrate the Wrious ~tics of synclirOnous motors

+VARIABlpound DC

_sUPPLY

STATOR ROTOR middotL1middot 11 A~~-eJ-----CJ

middot AC u l 12

~~YB~T middotJ3~T3

ct-O--ltr

VARIABLE + DC SUPPLY

FIGURE 1 SM-10o-3A AS A SYNCHRONOUS MoioR

ABC AC SUPPLY INPUT

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OPERATION The proper ampinn~~ fo~ operation or the SM-l00-SA as an alternator are ALTERNATOR) shown in Fi8Ure ~ With tliese connections made and the switch in the SYNCL RUNposition drive the alternator at 1800 RPM With a sUitable prime mover

Energize the DC Voltage supply and increase thesupplys output to bicrease f themiddotslternatorts output voltage to the desired value Toggle the circuit breaker ~L ~ tlie ON pPSition to connect the alternators output to the load Used to

middotdemonstrate the characteristics of a polyphase alternator of the stationary arshyr mature typebull ~t may also be used asthe loading device when testing the varishyI oUsmotom- shy

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OUTPUT

rmiddot~ FIGURE 2 L SM-10o-3A AS AN ALTERNATOR

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SERJES100 OPERATING INStRUCTIONS

oMOoDEL DMmiddot1 DDA DC MACHINE

GENERAL The DY-10OA is amiddot two-pole compound-wound machine ~g of a shunt field a series field and an armature winding A shunt fie1dmiddotr~t and two-pole startel switM are also provided in the-terminal box ~tings follow

SPECIFICAnONS

MACHINE

Shunt Field Ex SepO5A 125V Insulation CJass F middotMax Ambient Temp 40 ~C (104 OF) Rating Continl101iS Speed 1800 RPM nominal Shunt Series Compound wo~dJl1Otcr

125V SOAt 18 HP Shunt Series Compound wound generator

RHEOSTAT

Resistance Power Current middot Taper Fuse Minimum Resistance Position

STARTER

Type of Operator No of Poles Overload Type Trip Rating middot Reset Method

125V 2A 250KW

800~Ohms

100 Watts O575middotAmps Lin ear 1A SJo Blo

Toggle Two Thermal 4lAmps Push Toggle down

ENGI-NEERING CORPORATION ----MANUFACTURERS OF eoulPUEHT FOR EDUCATION ANOINOUSTRY

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L FUNCTION The primDrJ function or the DC motor is to demonstrate the characteristics of

shunt series ancl compOund motors~ It IIl8Y also bemiddotutiHzed as a prime mover when testiJlg a gel1eraloror alternator Using the DCmiddotmotor tor this PurPose has the advantage th~tbe speed may be held constant bymiddot8djusting tJie shunt field rheostat after each load step is applied

L OPERATION The -proper connections for operation as a ClUDulative compound DC motor are

(DC MOTOR) shOWDin Fipre i Withmiddot theseoonndionS made the motor may be started by moving the starter switch toggle up to the ON position It is good praetioe to stad the motor with the shunt field rh~ in its minimum resistance fully COW position to provide m8amum starting torque andmiDitnum starting Curshy

L rent The motor may then be adjusted ~ the desired speed byadjUBtingtbe field rheostat or varying the line voltage

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1 125VDO SUPPLY

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+ 125V DC SUPPLY

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FUNCTION The DC generator is p~arily utili2ed to demonstrate the characteristics of shunt series ~dCOinpound gen~tors It is~ alsOusedastlle loading device

when testing the vari~us motors

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OPERATION The~CODnections tor operation as a cmnulative C()~po1l1ld nCgenshyeratorareshown in Figure 2 With these connectio~middotmiddotDltldeJ drive theJDCmiddotGENERATOR gen~-atapproxhnately1800RPM with a suitable p~e moVer With thefie1qrheostatJnits Jll8Ximum resistance fullyc1ocm~ position enshyergiZe thel15V DC field supply Rotate the field rheostatinthecltunter

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resistance load

+ 1151 DC - 230 W

OUTPUT

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ENGINEERING CORPORATION MANUFACTURERS Oyen eoutPUampNT FOR EDUCATION AND IHOUSTRY

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MODEL MGmiddotBmiddot100DG BEDPLATE f

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The MG Bedplateconsists of a heayy s~ baBe n10~~middotmiddoton vibration pads The

I - GENERAL

function otthe bedplate is toe~le the quickmounting ~dcoup1mg of the two individ~ macbiDoes to form a completemiddotmiddotm~ior-Pnerator setpwothreaded hpldshy

~ down)1Ocks ~d winged screwsareprovidecltoseeurethe F t claJnps which hold tbeinBcbinetsmounting boards A couplingguard and two shaft ~gwrrds are p~

r vided to p~ttheSiudenttrom accidet1talJito~gor~~gwires0l1 rotatshy- shy ing)arts The guardsmiddotare quickly mounted bY insertirig retamer CUpS in~T~9tsin

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The procedure for mou~ting and ioupling the machines to the base is as fon~

L 1 A~just each wing screw 021- ~e two screw clamp hold~ownmiddot ~locks to the top of its threaded stud - 0

i 2 Place each ~chine so that the rear of the base is reSting agairistmiddotthemiddot thd rear clamp on thei L- MGbasemiddot

8 Slide machines iJiboara until ~elrcouplingl1anPs are centered oVer cen~ slots 4 bert rub coupnngmiddotsleevemiddot~toone of the mac1dnes co~pling 1IimgM~ L

5 Slidere~jning machines coupling flange into-the other side of couplbig sleeve 6 Checktobe Sure thatmiddot~e couplhig guard will cOver coupling when insertedmiddotinto one ot thel pails areenter slotsmiddot 7 plaCe front clamp tor each of machines against the front or the two macbiD5t bases

(- s 8 F~pr tighten ~~uts 9it middotthe two screw clamp hold-down biocks Lmiddot 9 Mount coUplini aDd shaft guards by locating appropriate retainer clips in slotS so that coushy

pling is ~der co~Ung guard and ~ sh~ is covered by a ~haft guatdL

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The Dlountiugis now cOmplete and whau electrified the machines will rOn smoothly and quietly due t bull

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SERIES 100 -OPERATINGINSTRUCTIONS

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MODIL1-10oaA TRANSFClRfJIER OEMONSTRATOR

GENEijAL The TlOO-8A~~ts of three Single-phase bansformers wit~ m11Jtiple primary and secondary taps terminated atpinreceptacl~on the front of the unit Each of the three ~rOrinersmay beused independen1q Or the threemay~interconmiddot

f nected mseries~1npQmneJ or inmiddot many poJyph8seCbnfigurations

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EacbtraDslormer is~~middot af)vol~amperesat 60 Hertz ~ has two primary~d

two secoDdaqwindiIlBL Each ofthe priD1817 windiD~1tas800 turns of Nobull 24 gauge-wire and JSmiddotm~-120volta 05 amperes Onewhidingis tapped at 82 volts toprovide~~middotS~tttllp~(866$)middot~fthemiddot twomiddotwiDd1np~ 68ri~ Each or thesecondshylQ7middotwindh1pmiddot1uIs100t11rns of No 21 gauge wire and israted 60 volts 10 ampere One winding Js tappbd atmiddotlaquo volts to p~vide a Scott tapor the two windings in series Shownbelow are the voltage ratings orthe various taps for each of the three traDspoundormers

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t o 32V 120V 0 120V lI__

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middotSEmiddotRIES 100OPERATING INSTRUCTIONS

t bull MODEL middotRLmiddot100AmiddotRESISTANC~LOAD J J- shy~ GENERAL The RL-IOOAfs variable ftsistance unit used to applya resistivel0a4middottogenera

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tors or altemators One unit may be used in single-phase applications ora bank L of tlmae units may be combhled intQ Wye or De1taCOnt1IJDlt1~DS tor three phase

applicmioDS TiieRL-lOOA mttoduces resistieload~ ~sequentild steps r designed to prod11CB approximateiy equal ipcremeJlts otJoadmiddot~tmiddot The SPST f ~ toigle switches are numbered andmiddot must be cloSed in nUD1erl~ordertodecrease

totlreslstance~creasmglOad The total ~cemiddot or the cOb~ected~rs ( may be COmputed f~theequation L

middot 1 1 1-1 ~=R1+Ri+lt8middotmiddotmiddot

The ConowingO equations may be used to detemUne the power disSipated from a measurement of load currentor voltage

L P=EI = = I~

p (ampp) = 8 xEpBPH (tor balanced ioad)

Where P=P~inWatb

E =yoltage inVolfB I = Currentin Amperes

f R =Resistance in Ohms L P(Stp) =middotmiddotTotalPower for Three-Phase

~H ==~ Voltage per Phase~r Load Bankf L bull IpH = Ourrent per Phase ofLoad Bank ampshy

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FROM AC OR DC SOURCE

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~ SERIES 100 OPmiddotERATmiddotING INSTRUCTIONS

MODEL RLC-100RESmiddotISTANCE-REACTANmiddotCE LOAD

The RLCl00 ismiddota variable resistance and--reactance- (either ~ductive or capaci- tive) uDit that ~y be used _to apply a singl~plmse or a three-phase load The remstive load (w~ can be ~ for both middotACcd DC) is controDed by siz SPST toggle switches e8ch of which puts 2000 ohlnaof resistance in paraDelmiddot lor all three phases simultaneouslybullThe resistive-load is therefore always balanced The total resistance in eacli ph8se equals 2000- ohms divided by the Dumber of switches closed For example with two sWitehesclosedtbe total resistance-is 1000 ohms rith aUsiZ closed 8888 ohms Each or the three reactance loads (used forAC o~) separateVfused at 1 amp is controlled by a knob that varltlSthe degreeopound lead andmiddot l8g A clockwise rotationof the middotknob applies leadiIlg pOwer factor (cashypaCitive)loid while a counterc1~ rotation appIiesa lagging power factor (inductive) load There is DO lpadapplied whenthe-knob is in mid position

The 8-4-5 right triangle graph below may bemiddot~ to approximate a O~8 power factor leading or lagging

1 Appfi a resistiVe load 2 Readthe in-phase current h from -the ammeter 8 From the lR value on tlie horizontal base of the graph travel vertically to the

point where it intersects the 08 PF (total amps) line 4 Frommiddotthis point travel horizontally to the reactive current wlueIz 5 Adjust the ~ve load until the Ix ammeter reads this value of reactive cur

rent

6 To obtain a ~ced load in a three-phaseconfigaratioD repeat Step -5 for the other two~

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RESISTIVE AMPERES

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-17 35 Henry

-13 47 Henry

middotINDUCTANCEDIAL POSITIONmiddot (~middotQLJNT~RCmiddotLOCKWJSE)

-12 51 Henry

middot11 ~ 57 Henry

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-15 ~41middotmiddotHQIllY

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-7 97 HefJry

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-18 33 HenlY

DIAL POSITION CAPACITANCE (CLOCKWISE)

0 69 llF

1 1~57 J1F

2 316 J1F

3 501Jlf

middot4 640J1F

5 80~J1f

6 985 j1f 7 1160middotpF

8 1360J1Fmiddot

9 1609middotJ1F

10 18~JtF

11 2007~middotF

12 2170 fLF

13 2513 )iFmiddot

14 2860J1F

15 3090 pFmiddot

15 3269JlF

17 3539 JlFmiddot (

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SERIES 100OPERATING INSTAUCTIONS L

- -

-

MODJL ACVA-10()ACMETERINGPANEL L GENERAL The HAMPDEN Model ACVA-1OO consistsmiddotol two AC ammetem and one AC voltshy

meterA11 or the meters are dioaeprot8cted against overloads as high 1Ui 1000f

The ~ltmeter islicctt8 within 8 w1UIemiddotthe ammeters are accurate wi~hin ~ plusmn29D ormiddotfWl sCale dellection The middotme~rshave the following ranges

r I AC Voltm~teI Oto l00~OO V~ts ~ AC Amme~ OtlJQ5f2f4l8-Amps

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OPERATION

AC AMMETERS

L 1 Connect the ammeter in series so that the middotentire AC current to be measured passes

I through the ~~ter The test lead from the dark blue middotbindingpostis connected to one

side or the Dne and the test lead trom the Qrange bin~ post to the other ~ L

2 ~e choice or measuring range is iet with the range switch Fourmiddotranges are avaiiable O 05 0204 an~ 0 - 8 amperes

8 Set the rangemiddotswitch on the 8 ampere range Detore turning on the power

a) When ~ to measure motor current put a jumper lead between the tWo binding poststo protect the movement from the large inrushcurrent at start This jumper is

(

removed after the motor has started

--~---~--~_--------~---_~_----ENGINEERfNG CORPORATION

MANUFACTURERSmiddotOF rpUIPMCNT F()R EDUCATION AND INDUSTRY

L POmiddotBoxS63 East Longmeadow MA 01028middot (413) 525-3981 bull TLX 9gt5426 bull Pax (413) S2S-474i

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SERIES too OPERATINGINSTBUCTIONS bullbull It bull bull - - _- _ _ - ~ e - _

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MODELACWM-1 GO WATIMETER PANEL

GENERAL The1iAMPDEN Model ACWMmiddotI00 consists artwo Iilulti-rangewattmeters and

I tbe~tchesh-lh~r operation Eacli has ~e follOwing ranges l

)to 1~30016~1200W

(150300Volts 2148 Amps)

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OPERATION Measure wattage bymiddotconn8cling a wattmetervoltmeter andmiddot~ete~8sshownin Figtt81 The ~-MPstttOn mustO be~middotconn~middotin series- with the ioad and-the

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VQTS con mUstmiddotbeqo~n~middotiJ1 prU9l1elwith the load protected against overloads by diodes

The Otlrrent~Coils are

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-FIGURE 1 WATTMETER CONNECnONS 14IJ -- -

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Balanced Load

F-4 Cent

Each wa~eter has tWomiddot Voltage mtinp (150 and- 800V)~ Rotating the range -switclirounterciOCkwise from OFF engages the 150 volt range Rotatmg the _range SWitch clOQkwise from O~ engages the 800 volt range Utilize the Voltmeters readiDg to determine the approprlllte-range

Each wattmetermiddot has three currentmiddot ratings (2 4 and SA) Rotating the range swiJchfrom middotO~engages the Samprarigefbst ~ the wattm~termiddotreadsbelow ~r 8Cll18 and the ammeter indicates that the 4 amp rating will not be ~e9 ~ectmiddotthe 4 ainp range-middot If the mttnie~ again reads below balt scaie and the ammeterindicates that the 2 amp rating will no~ bemiddot exceeded the 2 amp range may bese1ectedI

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L FIGURE 2 WATTMETER CONNECTIONS 3fi1

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L middot The totalwatbge is the sum of the two meter readings PI and P2

f When pow~ in a ~ced load is m~ured in this ~er the indication or the 1

two ~eterS VlLL~PT be the same except at 1D1ity power factor middot -shy

When the power factor of the circuit is less than 509b the pointer of meter PI will reverse~ To obtain total wattage in this case reverse the current connections to metet Pl -then subtract the rea~g ormeter PI from that of meter P2

The twO-wattmeter~method cannot be used with as-phase 4-wire load Three wattmeters are ~ in that case

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L eNGINEERING CmiddotORPORATION -----w-NUFACTUREAS OF EQUIPMeNT fOR eDUcATIOH NCO INOUSTAY

L Po Box 563 EastLcmgm~~owMi 01028 (413) 525middot3981 bull~middot9S-S42~ bull Pax (413)525-4741

F-4 Cont I L

POWER FACTOR i f ~

Given a balallCed load the~oWer tacentor middoteanbe -d~emiined from the two wattmeter mth6cL - ~

L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

J be calca1ated -from-the -following_equation0

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tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

wherep2 repr~ts th~~ier~thetwoWl1ttiJ1~ re~ingswhentbepower faeto~l~other thaD uPity

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MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

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DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

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b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

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1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

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a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

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ENGINEERINGo 90RPORATION -----MANUFAeTURtRS OF poundQUIPMpoundNT lOR EDUCATION ANO INDUSTfty

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MODEL-1723 rACHoME~R

DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

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MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

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l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

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cuit ~~ (both ~ ~ncl BEc) A clockwise lOtation of the vol~cpntro1 -- ~ ~eause ~~~~the voltage a~ble at the appropriate 1~Ptashy

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A pindiilg ~ groun4 oenn~oDis proVided at each end or the panel fOrgrounding the rotating macbin~

ENGINEERING CORPORATION -----MANUFACTURERS OF eciuaPMENT R)R EOUCAT1ON AND INDUSTRV bull

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Page 2: [1 Table D. - UTKweb.eecs.utk.edu/~jsl/ECE325/ECE325-LabManual.pdfLab #2 Load-Speed Characteristic of a DC Motor . Objective . The objective of . this . lab is to . detennine the load-speed

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l Accessories ~

MGB-lOODO Bedplare C-l

Transformers I J

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- T~ 1OO-3A TraDsfonnerDemonstrator 03 i- Load Units

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RL-l00A RcsistanceLoad B-1L RLC-lOO Resistance~Reactancc Lead B-2middot

Meters ACVAOO AC Metering Panel F-2 t shy

ACWM~l00 WattmeterPanel F-4 DCVA-1m DC Metering Panel F-S

Mode11723 Bench Tachometer F-IO

Pow~ Supplies L BPS-l00-P-3 Power Panel 0-1j

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C Lab Guidelines

L Grading

1 Students~required to complete allfour labs Failure to complete the Cportofany of themiddot ~bsltWiII~sultm an incomplete

2 B~chlabmiddot~port willJjewOrth 30 points Two points will be deducted for each day late 3 The gra4iIig o~tl1~middotl8bswill be bas~ on the following in this order WoIkandca1culations

-f guidelmes alloveare followed easy to follow and read and presentation L

Lab Re~ReQuiyenments

L The~repqrtsDl1jst fucludethe following (mtbis order)

lQ)verpa~~cludingtitle course numb~rtstudent namcani date tmn~ in 2 IntroductiOnmiddot

r 3 Fte-La~question~and answers

4middot LabqD~Sti()l1S ~d 811SWers

5Com~of~cu1atedand experimental data (meaning tabularandemPhicalcigtmparison) j 6bull C()ncluslans~ shy

7 App~ndiX iricludinglAb handout wiring diagrams and Lab data sheets f middot L Be sure to la1lelaIl figures$lables~ and sections

Data PresentatioD

1bull Labelallgraphs with captions indicatingwhat the plotsrepresents 2~ Include labels for both axes

1 3 If there aretwoormltgtre graphs onthe same plot inclu~a legend-- 4 Label tabular data -c bull

SAlwaysmiddot specify units

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Before Lab Meeting 1 Lab Meeting 1

Before Lab Meeting 2 Lab Meeting 2

Before LabmiddotMeeting 3

Labmiddot Meeting 3

Before Lab Meeting 4

Lab Meeting 4

Before Lab Meeting 5

Lab Meeting S

Lab Schedule

Review the Lab Eq~ipment sheets in the back of the manueL Introduction to the Lab

Do Pre-Lab from ~ 1 Part AshyGet Pre-Lab checked off -Penonn experiment from the Lab Exercise

Write Lab 1 report Do Pre-Lab from-Lab 2 Dont forget Parts A amp-Bl Turn in Lab 1 repOrt Get Pre-Lab check~ off PerfOnn experiment from Lab 2 Lab Exercise

Wrlte~b 2 report Do Pre-Lab from Lab 3 TUm in Lab 2 report Get Pre-Lab-checked off

Perform experiment from Lab 3 Lab Exercise

Write Lab 3~

Do Pre-Lab frOriiLab 4 Turn in Lab 3 repon Get Pre-Lab Checked off

Perf~experiment from Lab 3 Lab Exercise Write ~ 4-rcport

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Lab 1 Voltage Regulation of a Single Phase Transformer

Objective

The objectiveof this lab is tocorrelate the calculatedvolmgeregulation ofa single phase

transformer with the regulation obServed in the laboratoryt and also to make general observations about transformers L

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The laboratory transfonncr is to be used as a 220110 volt transformer (see Figure 1) The series

impedance referred to the 220 volt si4e is approximately (24+j12)0lr

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Figure 1

1 State the voltage and current relaqonships of an ideal transformer t bull 2 List some reasons why real world transformers are not ideal-l

3 Define voltage regulation 4 Assuming a purely resistive lo~d calculate and plot the relationship between secondary

tenninal voltage (V2) and secondary currentmiddot(12) for a 220 voltprimary voltage (VI) and a

maximum secondary current (I2) of2 amps

5 Draw a circuit diagram showing how the relationship between secondary voltage and current can be measured in the laboratory Indicate sources variable loa~ voltmeters and ammeters

Lab Exercise

1 Connect the circuitfrom the Part ~ wiring diagram 2 Record enough readings ofV2 and 12 to compare with calculated values

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Calcul~tions and Comparisions

L 1 Compare the experimental andcal~ulated results 2 eaicul~ thevoltage~gUlatiQn 3 Why was the eXcitatiOn~chnoiincluded in the calculations Did neglecting this excitation

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POVVER PANEL

0 0 0 0 0 12OVACtaoYAC 002401t~ AC4O-o4W ~AC At AI PAl bull oSOVDC bull sec PRJ bull UVDC bull sec

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l L Lab 2 Load-Speed Characteristic of a DC Motor

Objective

The objective of this lab is to detennine the load-speed characteristics ofa DC motor

rmiddot Part AL

1 The DC machine will be ron as a genetator at a constant speed- The armatureresistance (Ra) will 1 I bull -- becalculate4 to assist in plotting tbeSieed VSla annature current

l t Pre-Lab middotL

smiddot 1

I Calculate a synchronous motors rotor speed (f=60 HzN=120fp) for a machirie with four poles and fora machine with six poles

2 Calculate the value afbaclc emf ltEa) fora DC motor (Ka~ = 6944e-2 VRPM) with arotor

speedof 1800RPM with a rotor speed of 1000 ~ and with a rotor speed of0 RPM 3 Draw a circuit dia~ ofaDC machine connected as a separately excited generator (show

~ -resistance indilctance and voltage the field inductance and resistance~d the variableresistive load) Show how to conneCt a voltmeter to measure armature voltage and bow to connectmiddota ammeter tome8sure annafure current

Laboratory Exercise

L Laboiatmy Setup

1 ConneCt the DC machine as a se~tely excited generator and connect the synchronous mac1rlneas a motor as shown in Lab 2 Part A Wning Diagram

2 Mechnica11y couple the two machineS so that the synchronous motor drives the DC generator 3 Set the synchronous-machine to IND STARTt

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4 TurD on the main AC power S Tmn the syncllronoDs machine field voltage (0-150 VDC) to position 3 6 Set the synchronousmachine to $YNCH RUN 7 Make sure the rotor speed is 1800RPM

Laboratoty Measurements

( 1 Measure open circuit armature voltage (back emf) and field cmrent as the DC machina field

1 voltage (D-l25VDc) is increased Use field current (If) increments of about 005 A and vary shy

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If up to 05A 2 Set tbeDCmachin~s fieldvoltage to a value ~atbrings the open circuit annature voltage to

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i Do not exceed an annatme current of2At Record eoughpofuts to ~phtheVa VS In L charaCteristicbull

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1 Plot back emf versus fie1ilCUlTent L

2 Plot ~~ture tenninalvoltagc versus armature current

3 Calculai~ta va1~eforannatureresistance (Ra) from the slope ofVa vsIamiddot - ---~~ ~l 4 ~atPtPose does the synchronous machine serve fot Part A~

Part B

The DC ma9bine will be ron as a DC shunt moftr~ The sPee4vs armaturecurrentchara~tic

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will be mcas1Jtcd andplotted and the effectof anna~ reacnon will be evaluated

Pre~Lab

L 1 DraJithecircuitdiagram ofa DCmiddotshunt motor

1 1 2 Defihe annatitte reaction shy

3 CalcnlateKa~forVt=Ea=125V at 1800 RPMmiddot

4~ Develop a re1ationshipmiddotof speed as a funeti()11 ofannl-~ ~nt Use the values of Vt andL KaW from above and assume that annature reaction is negligible I L

Laboratory Exercise

2 I -- LabomtotySetup t

I i 1 Set the ()lS0 VDCknob to position 3

2 Set the synchronous machine to SYNCH RUNt l

3 Co~ecttbeDCma~hine asa shunt motor and the middotsynchronousmiddotm~hineas a 3-phase ACL

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generator as shownin Lab 2 PartBWiring DIagram 4 Connect the variable three~phase resistive load to the oU1put tenninals of the synchronous)

L machine The resistance of the load will be increased to place a mechanical load on the DC motor (drawing more current through the DC motors armature)

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Laboratory Measurements

1~ U~ouple the two machines 2 Turn on main power 3 Set the PC armature voltage (by using the ~12S VDCknob) to 12SV 4 Adjust~eDC machine field rheostat to obtain a no-load speed of 1800 RPM

s Measure annature voltage and ~ature current at no-load

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6 TUrn theO-l2S VDe knob down to stop the motor (leave the field rheostat as it was set) 7bull Couple the motor andthe gener8m 8 Tmn th~ 0-125 VDe knob up to increas~ armature voltageto 12SyenL 9 Incre~~ the load onthe synchronous gCIieratorbull For each 3-phase load switch record the

annature current and the speedJ L

Calculations 1

L 1 Calculate the power consumed by the DC machine at noload(no-16ad losses)

I 2 Plot speed versus ~ature cocrent (a) from claculatedvalnesusing Rafrom Part A andIa = 0 L- tolS A (b) using experimentaldatagathered in Part B CoIPpare the two plots

3 H themiddotvaIueof Kaclgt decreas~s withhigb~annature current how is the speed effected~

4 How could one explain the ttiffercncesbetween dle experimental and theoretical plots Shouldannature reaction be neglected Use figures andor m~strations to support your answer

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Lab 2P~~t A Wiring Diagram

PQVIER PANa

0 Omiddot 0 0 0 12fNNJ t2OVAC MAlHAC PAt bull ot5OVDC bull SEC PAl bull o12SVDO bull SEC 12OVAC~~W

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POWER PANEL I bull

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calculate the parameters ofan inductionmotorequivalent circUi~ and to compare the calculated values with measured values L

Pre-La))

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1 What are the two typeS ofrotOis used mAC inductlonmotorsl t 2 Give theequation for SYDchrono~ speed What is the synhronous speed for a four pole AC ~

L ~d-qctiltgtn~bine (standacent ~efrecFJe~) 3 Define slip for an induction motor If thesynchronous speed is 1800 RPM and the slip (s) is

L 001 what is the rotor speed Ifs == 011 -

l bull 4 Draw a power flow diagram for an AC induction ~otor

5~ middotmiddotDrawatorque VS~ sp~d curve for ail ACinduction motor What is the torqu~ prodnced at synchronous speed (Ns)

6 DescnDemiddot~ no-load test and the blocked rotor ~t for an induction motor Whatis the value ofslip for a Blocked ~otor Test

7 Draw the lEEE-recommended equivalent circuit~ shyL

Calculations C l

l Given the follow~g test results

fLj No-load test Line voltage= 210 V

Linecuxrent iO77 A

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Iiiputpower = 52 W L

I - Blocked-rotor test Line voltage ~ 60V shy tinecu1rent 17 AJ - shy

Input power == 100 W

Also given stator r~tance (Rl) =53 Wphase DL synchronous speed (COsyn) =1885 radlsec

L (R~ember that you are worldngwith a 3-phase machine)

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1 Calculate the parameters of the lEEE-~~ended equivalent circuit 2 Calculate the induction motornopad rotational Io~ 3 CalculateI2t I1t PF Fin Ptiutt Eff and ToutfQrslip v~ues fa11ging from 0 to O~l (with

L step siZe 001) (Pont =Pmech - Prot and Tout = Tmechgt

3 ~lot outputtorque versus speed ~ 4 Plot power factof versusoutput powe~ 5 piot AC)ine current versus outpu~power

i 6 it Plot efficiency versus outPut pow~ shy

LabormiddotatorY Exercise LabgratolY Setup

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L 1 S~tUP middottheOC machine as a sep~te1y excited generator with variableresistance load bank andthe wo~drotot motor as an indu~on motor to drivemiddotthe DC generator (Connect the

indu~Otimotorstatotwindirigsfu a delta confi8uration) This is shown in the Lab 3 Wiring Diagrallt ~

3 CQ~tXtawattmetet to measure power into the itlductionmotor 4 CoDnectDC meters tomeasure DC generator ~nniDalvoltage and armature current 5 Connect AC ~terStOmeasweline to neutral voltage and line current

j 1

- Laboratoxy Me~ments

J 1 Mechanically conple the induction motor to the DC generator-

2 Bring the 3-phase AC voltage to 120V (line to n~tral) ~ I

i 3 Whenmiddotthe induction mot-or is running (around 1783 RPM) bring the nmiddotc machine terminal ~ ~ ~oi~ uP to 125 V middot

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(lOt andp~~rofone_p~e (WI)bull middot 5 RCCC~d DC generator values values ofvoltage at terminal (VVand armature current (Ia)

6 First take a set ofmeasurements with all the resistance switches off 1 middotTheD continuerecordingmiddotas theJoad is increased up to ACmiddotllne current of 15 A Do not

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CalctilationS

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~ 1 Calculate values for Pin Pout PF Eff~ atidTout

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4 Plot AC line current v~~outputpower f 5~i Plot~fficl~ncy verSusoutputPQwer L 6 Con1p~ethe ~resu1ts wi~thecalcu1ated results 7 CommeIJton the wisdom ofbuying an indu~on motor having a signijican~ygreaterporse i L power ra~g than iSrequiiedmiddot to dothejob~

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Lab 3 Wiring Diagram

PONERPANa

0 0 0 0 0 120VAC ~laquoNAD4O-4W 12OVoAC MAINC PAl bull o-1atNDC - SEC PAL bull 00121VDC bull SEC 12OVAC

0 ~ 0 0 GJ EJ []] 0 GJ ~ 0 ~ 0

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L Objective

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L The objective of ~ lab is tomiddotexamine the terminal characteristics ofa synchronous motor under - I08(fand no-load conditions

i L

Pre-Lab

i - L 1 Whatisan important feature ofsynchronous motors

~ Dra~ariequivalentcircuit modetfor a synclnypousmotor ShowEf Xs Ra Iat~Vt If and

the fiel~winding 3 Descripe the open-eircuit test ~t is measured What is varied Sketch the circuit 4 Descn1le the short-circuit test Mat is measured What is varied Sketch the circuit 5 Sketehatt open~ircuit ch8rac~riStic aDd a short-circuit charac~eriStic Show Ia (rated) Vt

(rated) a11da modified airgaplineL

Laboratory Exercise f Part A L

The open-circuit and short-circuit tests will be performed to determine values f~r Xs and ~using

LI

the synchronous machine as a generator

Procedure

1 ~ Connect the DC machine as a selfexcited shunt generator 88 shown in Lab 4 Part A ~g

diagram

2 ~ Couple the DC machine to the syn6~nous machine f 3 Set the 0-125 VDCbob to zeromiddot L

4 Set the 0-150 VDC kn~b to zero 5 Set the synchron~us mac~e to INn START e

6 Bring the DC~cbine terminal voltage up to 125 Vt and adjust the field rheostat to obtain a speed of 1800~M

7 Set the sYnchronous machine to SYNCH RUN 8 Perform the open-circuit test With the synchronous machines terminals open measure the

( voltage across the windings (V00) as field current (If) in increased Increase the field current t - by increasing the DC voltage across the field winding Vary If from 0 to lA in increments of

l 9 OlA Set If to zero

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10 Perform the short-circuit test Short the ph~ windings of the synchronous machine and put

i i an ammeter in series with the shorted windings Measuremiddotthe average windingcurrent (Isc) as L

If in increased V~If from 0 to lA in increments ofOlA ( t

i L- Calculations

1 4~middotVt = Voc =120middotVcaJ~ulatcentmiddotXs and K(Xs =Voc IIsc andK= Voc I If)

2 P16tIIalvs If~(IIal =1Vt--KIf) I Xsi ) t L Part Bmiddot L The annatuIecurrentwill be measured agfield current is varied under loadmiddot and no loadconc1itions

L-

-

1 Connectfh~sySte~ as sbownin the Lab 4 Part Bwiring diagram but do not couple the syn~~riq~-~tiinetothe DC machine~

2 Senhe~chronousmac~to lND STARr 3 Thin tbe6-1S0vnpknobto position cO5~

4 TumODmailtpoiVer

( S S~ the synclnpnbusmachine tq ~YNCH RUN The motor speed should be 1800 RPM L 6 MeasureIa andItas If is varief1 up to lA

Load Procedure shy

1 TUm offmain power 2 Mechanically couplethe synchronous machine to the DC ~hine

3 Set~~ first nine switches of the resistance load to ON ) 4 Setthe-~chrononsmachine to lND START L

5 Turno~middot-m~~wer

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1~ 6 Tuni the~o-lS0VDCknob to position 20bull

~ 7 Settheo-l25VDCknobtoposition pound9 tbull

8 Set the synchronous machine to SYNCH RUN The motor speed should be at 1800 RPM 9bull Measure Ia and Ifas Ifis varied up to lA

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Calculations L

1 Plot Ia V8 If for load and no load conditions and compare with c~cu1ated graph

2 Is there a best~fieldcurrent at which the synchronous machine should be operated

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Lab 4 ~art A Wiring Diagram

POWER PANEL

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SERI~S100 OPERATINGINSTRUCTIONS amp bull ~

MODEL WRM-100-3A WOUND-ROTOR MOTOR

GENERAL The WRY-100-SA is a three-phase four pole wound-rotor motorconsisting of a stator winding and a rotor winding withldip rings and brushes A three-pole

~ circuit breaker ~ also provided in the termm81 box The nominal ratings of the motor ari~ circuit breaker are listed below r

1 J l-- SPECIFICATIONS MOTORL

WmdingTypeshy Wound Btafor amp Rotor Horsepower shy 13HP Speed shy 175QRPM Voltage bull 20SV bull Sf Amiddot or 860V-s+Y

I Frequency- 60Hz L- Rating Continuous

Full Load Current bull 17 Amps

CIRCUIT BREAKER

Type of Operator bull Rocker Switch L No of PoleS bull Three

Overload )pe bull Thermal Trip Rating shy 2DAmpS Reset Method - middotOW- to Reset

r I - shy OPERATION To operatethe ~-l00-SAas an induction motor make the connections shown

in Figure L Rotate the Wound Rotor Speed Control ~b to the maximum resisshytance fttn~ counterclockwise direction With all th~ ~ce in the rotor cir middotcai~ the motor-willdevelop maxirilum starting torque and minimum ~g curshy

rent Pwih up the rocker switch on the circuit breaker~ startmiddottqemotorbull The motor will accelerateup to speed The rheostat providesthe mSansofv~g theL motors lQieedtorque characteristicS The effect of the rlieostat increUes with increasing load onthe motorr ~

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A 6 C AC INPUT SI1PPLY

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WRSe-100

FIGURE 1

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GENERAL

SPECIFICATIONS

middotMODEL SMmiddot100middot3ASYNCHRONOUS MACHINE

ThemiddotSMmiddotI00-8A is a three-phase four-pole machine consisting of a wyedel~ stashytor andmiddot 8 quadrature rotor having a DC field winding and a damper winding A three-pole circUit breaker and a IND START-BYNC RUN switch are provided in the terminal OOx- RatingS fonow

SM-100-3A MOTOR ampALTERNATOR

Speed - 1800 RPM Voltagemiddot Max Ambient Temp Insulation bull Rating bull

CIRCUIT BREAKER

Type of~tor shyNo ofPoles bull Overload Type bull Trip Rating bull Reset Methoa shy

ALTERNATOR

Power-Load Current bull Fielti Excitation shy

MOTOR

HorSepowershyCurrent bull Frequencyshy

208120V-B+-4W 4~ (1047) ClassmiddotB Continuous

Rocker Three Thermal L7amps

middot middotOFF to Reset

250 watts 07 amp (nominal) Separate L6 amps

18 HP 17 Amps 60Hz

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OPERATION Th~ proper connections tor operation of th~ SMl00-SA ~ a ~clttonous (SYNCHRONOUS motor are shown in Figure middot1 With ~ ~tebin the SYNC RUNposiliou MOTOR) ~ze the vari~ble DC supply and adjusttbe~tput voltage from zero up to

th~ value which eauses 1 amp to flow through the rotor ~turn the switch to the lNDSTART PO$ition middotand Start the motor by toggling~becircuit breaker to

the ONposltion WJten the motor reaches DO lQad 1ij)eeC1 move the switch to the SYNC RUN posItion The rotor will then sYnchronize with the nn~ and fJ1e motor wiD be ti1mrlng at exactly 1800 RPvL Used to demonstrate the Wrious ~tics of synclirOnous motors

+VARIABlpound DC

_sUPPLY

STATOR ROTOR middotL1middot 11 A~~-eJ-----CJ

middot AC u l 12

~~YB~T middotJ3~T3

ct-O--ltr

VARIABLE + DC SUPPLY

FIGURE 1 SM-10o-3A AS A SYNCHRONOUS MoioR

ABC AC SUPPLY INPUT

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OPERATION The proper ampinn~~ fo~ operation or the SM-l00-SA as an alternator are ALTERNATOR) shown in Fi8Ure ~ With tliese connections made and the switch in the SYNCL RUNposition drive the alternator at 1800 RPM With a sUitable prime mover

Energize the DC Voltage supply and increase thesupplys output to bicrease f themiddotslternatorts output voltage to the desired value Toggle the circuit breaker ~L ~ tlie ON pPSition to connect the alternators output to the load Used to

middotdemonstrate the characteristics of a polyphase alternator of the stationary arshyr mature typebull ~t may also be used asthe loading device when testing the varishyI oUsmotom- shy

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OUTPUT

rmiddot~ FIGURE 2 L SM-10o-3A AS AN ALTERNATOR

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SERJES100 OPERATING INStRUCTIONS

oMOoDEL DMmiddot1 DDA DC MACHINE

GENERAL The DY-10OA is amiddot two-pole compound-wound machine ~g of a shunt field a series field and an armature winding A shunt fie1dmiddotr~t and two-pole startel switM are also provided in the-terminal box ~tings follow

SPECIFICAnONS

MACHINE

Shunt Field Ex SepO5A 125V Insulation CJass F middotMax Ambient Temp 40 ~C (104 OF) Rating Continl101iS Speed 1800 RPM nominal Shunt Series Compound wo~dJl1Otcr

125V SOAt 18 HP Shunt Series Compound wound generator

RHEOSTAT

Resistance Power Current middot Taper Fuse Minimum Resistance Position

STARTER

Type of Operator No of Poles Overload Type Trip Rating middot Reset Method

125V 2A 250KW

800~Ohms

100 Watts O575middotAmps Lin ear 1A SJo Blo

Toggle Two Thermal 4lAmps Push Toggle down

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L FUNCTION The primDrJ function or the DC motor is to demonstrate the characteristics of

shunt series ancl compOund motors~ It IIl8Y also bemiddotutiHzed as a prime mover when testiJlg a gel1eraloror alternator Using the DCmiddotmotor tor this PurPose has the advantage th~tbe speed may be held constant bymiddot8djusting tJie shunt field rheostat after each load step is applied

L OPERATION The -proper connections for operation as a ClUDulative compound DC motor are

(DC MOTOR) shOWDin Fipre i Withmiddot theseoonndionS made the motor may be started by moving the starter switch toggle up to the ON position It is good praetioe to stad the motor with the shunt field rh~ in its minimum resistance fully COW position to provide m8amum starting torque andmiDitnum starting Curshy

L rent The motor may then be adjusted ~ the desired speed byadjUBtingtbe field rheostat or varying the line voltage

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1 125VDO SUPPLY

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FUNCTION The DC generator is p~arily utili2ed to demonstrate the characteristics of shunt series ~dCOinpound gen~tors It is~ alsOusedastlle loading device

when testing the vari~us motors

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OPERATION The~CODnections tor operation as a cmnulative C()~po1l1ld nCgenshyeratorareshown in Figure 2 With these connectio~middotmiddotDltldeJ drive theJDCmiddotGENERATOR gen~-atapproxhnately1800RPM with a suitable p~e moVer With thefie1qrheostatJnits Jll8Ximum resistance fullyc1ocm~ position enshyergiZe thel15V DC field supply Rotate the field rheostatinthecltunter

shy clockwisedir$ctian middottoinCreasemiddot the output voltage middotto the desiredmiddot value Switch Oti~middotthemiddotoverloadmiddot switChmiddotto connect the generators output to the

resistance load

+ 1151 DC - 230 W

OUTPUT

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MODEL MGmiddotBmiddot100DG BEDPLATE f

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The MG Bedplateconsists of a heayy s~ baBe n10~~middotmiddoton vibration pads The

I - GENERAL

function otthe bedplate is toe~le the quickmounting ~dcoup1mg of the two individ~ macbiDoes to form a completemiddotmiddotm~ior-Pnerator setpwothreaded hpldshy

~ down)1Ocks ~d winged screwsareprovidecltoseeurethe F t claJnps which hold tbeinBcbinetsmounting boards A couplingguard and two shaft ~gwrrds are p~

r vided to p~ttheSiudenttrom accidet1talJito~gor~~gwires0l1 rotatshy- shy ing)arts The guardsmiddotare quickly mounted bY insertirig retamer CUpS in~T~9tsin

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The procedure for mou~ting and ioupling the machines to the base is as fon~

L 1 A~just each wing screw 021- ~e two screw clamp hold~ownmiddot ~locks to the top of its threaded stud - 0

i 2 Place each ~chine so that the rear of the base is reSting agairistmiddotthemiddot thd rear clamp on thei L- MGbasemiddot

8 Slide machines iJiboara until ~elrcouplingl1anPs are centered oVer cen~ slots 4 bert rub coupnngmiddotsleevemiddot~toone of the mac1dnes co~pling 1IimgM~ L

5 Slidere~jning machines coupling flange into-the other side of couplbig sleeve 6 Checktobe Sure thatmiddot~e couplhig guard will cOver coupling when insertedmiddotinto one ot thel pails areenter slotsmiddot 7 plaCe front clamp tor each of machines against the front or the two macbiD5t bases

(- s 8 F~pr tighten ~~uts 9it middotthe two screw clamp hold-down biocks Lmiddot 9 Mount coUplini aDd shaft guards by locating appropriate retainer clips in slotS so that coushy

pling is ~der co~Ung guard and ~ sh~ is covered by a ~haft guatdL

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MODIL1-10oaA TRANSFClRfJIER OEMONSTRATOR

GENEijAL The TlOO-8A~~ts of three Single-phase bansformers wit~ m11Jtiple primary and secondary taps terminated atpinreceptacl~on the front of the unit Each of the three ~rOrinersmay beused independen1q Or the threemay~interconmiddot

f nected mseries~1npQmneJ or inmiddot many poJyph8seCbnfigurations

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EacbtraDslormer is~~middot af)vol~amperesat 60 Hertz ~ has two primary~d

two secoDdaqwindiIlBL Each ofthe priD1817 windiD~1tas800 turns of Nobull 24 gauge-wire and JSmiddotm~-120volta 05 amperes Onewhidingis tapped at 82 volts toprovide~~middotS~tttllp~(866$)middot~fthemiddot twomiddotwiDd1np~ 68ri~ Each or thesecondshylQ7middotwindh1pmiddot1uIs100t11rns of No 21 gauge wire and israted 60 volts 10 ampere One winding Js tappbd atmiddotlaquo volts to p~vide a Scott tapor the two windings in series Shownbelow are the voltage ratings orthe various taps for each of the three traDspoundormers

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t o 32V 120V 0 120V lI__

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t bull MODEL middotRLmiddot100AmiddotRESISTANC~LOAD J J- shy~ GENERAL The RL-IOOAfs variable ftsistance unit used to applya resistivel0a4middottogenera

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tors or altemators One unit may be used in single-phase applications ora bank L of tlmae units may be combhled intQ Wye or De1taCOnt1IJDlt1~DS tor three phase

applicmioDS TiieRL-lOOA mttoduces resistieload~ ~sequentild steps r designed to prod11CB approximateiy equal ipcremeJlts otJoadmiddot~tmiddot The SPST f ~ toigle switches are numbered andmiddot must be cloSed in nUD1erl~ordertodecrease

totlreslstance~creasmglOad The total ~cemiddot or the cOb~ected~rs ( may be COmputed f~theequation L

middot 1 1 1-1 ~=R1+Ri+lt8middotmiddotmiddot

The ConowingO equations may be used to detemUne the power disSipated from a measurement of load currentor voltage

L P=EI = = I~

p (ampp) = 8 xEpBPH (tor balanced ioad)

Where P=P~inWatb

E =yoltage inVolfB I = Currentin Amperes

f R =Resistance in Ohms L P(Stp) =middotmiddotTotalPower for Three-Phase

~H ==~ Voltage per Phase~r Load Bankf L bull IpH = Ourrent per Phase ofLoad Bank ampshy

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~ SERIES 100 OPmiddotERATmiddotING INSTRUCTIONS

MODEL RLC-100RESmiddotISTANCE-REACTANmiddotCE LOAD

The RLCl00 ismiddota variable resistance and--reactance- (either ~ductive or capaci- tive) uDit that ~y be used _to apply a singl~plmse or a three-phase load The remstive load (w~ can be ~ for both middotACcd DC) is controDed by siz SPST toggle switches e8ch of which puts 2000 ohlnaof resistance in paraDelmiddot lor all three phases simultaneouslybullThe resistive-load is therefore always balanced The total resistance in eacli ph8se equals 2000- ohms divided by the Dumber of switches closed For example with two sWitehesclosedtbe total resistance-is 1000 ohms rith aUsiZ closed 8888 ohms Each or the three reactance loads (used forAC o~) separateVfused at 1 amp is controlled by a knob that varltlSthe degreeopound lead andmiddot l8g A clockwise rotationof the middotknob applies leadiIlg pOwer factor (cashypaCitive)loid while a counterc1~ rotation appIiesa lagging power factor (inductive) load There is DO lpadapplied whenthe-knob is in mid position

The 8-4-5 right triangle graph below may bemiddot~ to approximate a O~8 power factor leading or lagging

1 Appfi a resistiVe load 2 Readthe in-phase current h from -the ammeter 8 From the lR value on tlie horizontal base of the graph travel vertically to the

point where it intersects the 08 PF (total amps) line 4 Frommiddotthis point travel horizontally to the reactive current wlueIz 5 Adjust the ~ve load until the Ix ammeter reads this value of reactive cur

rent

6 To obtain a ~ced load in a three-phaseconfigaratioD repeat Step -5 for the other two~

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RESISTIVE AMPERES

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SERIES 100OPERATING INSTAUCTIONS L

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MODJL ACVA-10()ACMETERINGPANEL L GENERAL The HAMPDEN Model ACVA-1OO consistsmiddotol two AC ammetem and one AC voltshy

meterA11 or the meters are dioaeprot8cted against overloads as high 1Ui 1000f

The ~ltmeter islicctt8 within 8 w1UIemiddotthe ammeters are accurate wi~hin ~ plusmn29D ormiddotfWl sCale dellection The middotme~rshave the following ranges

r I AC Voltm~teI Oto l00~OO V~ts ~ AC Amme~ OtlJQ5f2f4l8-Amps

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OPERATION

AC AMMETERS

L 1 Connect the ammeter in series so that the middotentire AC current to be measured passes

I through the ~~ter The test lead from the dark blue middotbindingpostis connected to one

side or the Dne and the test lead trom the Qrange bin~ post to the other ~ L

2 ~e choice or measuring range is iet with the range switch Fourmiddotranges are avaiiable O 05 0204 an~ 0 - 8 amperes

8 Set the rangemiddotswitch on the 8 ampere range Detore turning on the power

a) When ~ to measure motor current put a jumper lead between the tWo binding poststo protect the movement from the large inrushcurrent at start This jumper is

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MODELACWM-1 GO WATIMETER PANEL

GENERAL The1iAMPDEN Model ACWMmiddotI00 consists artwo Iilulti-rangewattmeters and

I tbe~tchesh-lh~r operation Eacli has ~e follOwing ranges l

)to 1~30016~1200W

(150300Volts 2148 Amps)

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OPERATION Measure wattage bymiddotconn8cling a wattmetervoltmeter andmiddot~ete~8sshownin Figtt81 The ~-MPstttOn mustO be~middotconn~middotin series- with the ioad and-the

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VQTS con mUstmiddotbeqo~n~middotiJ1 prU9l1elwith the load protected against overloads by diodes

The Otlrrent~Coils are

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Each wa~eter has tWomiddot Voltage mtinp (150 and- 800V)~ Rotating the range -switclirounterciOCkwise from OFF engages the 150 volt range Rotatmg the _range SWitch clOQkwise from O~ engages the 800 volt range Utilize the Voltmeters readiDg to determine the approprlllte-range

Each wattmetermiddot has three currentmiddot ratings (2 4 and SA) Rotating the range swiJchfrom middotO~engages the Samprarigefbst ~ the wattm~termiddotreadsbelow ~r 8Cll18 and the ammeter indicates that the 4 amp rating will not be ~e9 ~ectmiddotthe 4 ainp range-middot If the mttnie~ again reads below balt scaie and the ammeterindicates that the 2 amp rating will no~ bemiddot exceeded the 2 amp range may bese1ectedI

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L FIGURE 2 WATTMETER CONNECTIONS 3fi1

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L middot The totalwatbge is the sum of the two meter readings PI and P2

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two ~eterS VlLL~PT be the same except at 1D1ity power factor middot -shy

When the power factor of the circuit is less than 509b the pointer of meter PI will reverse~ To obtain total wattage in this case reverse the current connections to metet Pl -then subtract the rea~g ormeter PI from that of meter P2

The twO-wattmeter~method cannot be used with as-phase 4-wire load Three wattmeters are ~ in that case

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POWER FACTOR i f ~

Given a balallCed load the~oWer tacentor middoteanbe -d~emiined from the two wattmeter mth6cL - ~

L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

J be calca1ated -from-the -following_equation0

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tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

wherep2 repr~ts th~~ier~thetwoWl1ttiJ1~ re~ingswhentbepower faeto~l~other thaD uPity

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BiDet th~powertaetb~ 8q1alsthcosme ofthephaseangletP~powerfactor may also be I deterJninedfromtheratioo~thetwo wittmeterreadings middotmiddotThegraph b~ow shows the1 I

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MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

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L OPERATIONI

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DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

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agt If the currePtis~ter than 5 amperes the needlewDI move off-scale TuRN OFF POVER IMliEDIATELY AJf exception to this may be on motor starling Momenshytary current inrushbullmay exceed 5 ampe~ but theneedleiminediately drops back to normal

b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

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1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

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a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

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MODEL-1723 rACHoME~R

DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

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MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

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l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

cuit ~~ (both ~ ~ncl BEc) A clockwise lOtation of the vol~cpntro1 -- ~ ~eause ~~~~the voltage a~ble at the appropriate 1~Ptashy

L I tNOTE ~~ ~~ltage oo~~lbob fOr the 0-208120V three-phase sUpply is ~ted at the ~nd or the

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IfanY~r~es11PplifSri-e~vefloaded one or more circuit breakers may trip middotOFF Al- ir ways turnthemiddotVariable suppllesto zero and remove the C8usaopound the oyerload before resetshy

JL ting the circuitmiddotl~~em

A pindiilg ~ groun4 oenn~oDis proVided at each end or the panel fOrgrounding the rotating macbin~

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Page 3: [1 Table D. - UTKweb.eecs.utk.edu/~jsl/ECE325/ECE325-LabManual.pdfLab #2 Load-Speed Characteristic of a DC Motor . Objective . The objective of . this . lab is to . detennine the load-speed

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C Lab Guidelines

L Grading

1 Students~required to complete allfour labs Failure to complete the Cportofany of themiddot ~bsltWiII~sultm an incomplete

2 B~chlabmiddot~port willJjewOrth 30 points Two points will be deducted for each day late 3 The gra4iIig o~tl1~middotl8bswill be bas~ on the following in this order WoIkandca1culations

-f guidelmes alloveare followed easy to follow and read and presentation L

Lab Re~ReQuiyenments

L The~repqrtsDl1jst fucludethe following (mtbis order)

lQ)verpa~~cludingtitle course numb~rtstudent namcani date tmn~ in 2 IntroductiOnmiddot

r 3 Fte-La~question~and answers

4middot LabqD~Sti()l1S ~d 811SWers

5Com~of~cu1atedand experimental data (meaning tabularandemPhicalcigtmparison) j 6bull C()ncluslans~ shy

7 App~ndiX iricludinglAb handout wiring diagrams and Lab data sheets f middot L Be sure to la1lelaIl figures$lables~ and sections

Data PresentatioD

1bull Labelallgraphs with captions indicatingwhat the plotsrepresents 2~ Include labels for both axes

1 3 If there aretwoormltgtre graphs onthe same plot inclu~a legend-- 4 Label tabular data -c bull

SAlwaysmiddot specify units

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Before Lab Meeting 1 Lab Meeting 1

Before Lab Meeting 2 Lab Meeting 2

Before LabmiddotMeeting 3

Labmiddot Meeting 3

Before Lab Meeting 4

Lab Meeting 4

Before Lab Meeting 5

Lab Meeting S

Lab Schedule

Review the Lab Eq~ipment sheets in the back of the manueL Introduction to the Lab

Do Pre-Lab from ~ 1 Part AshyGet Pre-Lab checked off -Penonn experiment from the Lab Exercise

Write Lab 1 report Do Pre-Lab from-Lab 2 Dont forget Parts A amp-Bl Turn in Lab 1 repOrt Get Pre-Lab check~ off PerfOnn experiment from Lab 2 Lab Exercise

Wrlte~b 2 report Do Pre-Lab from Lab 3 TUm in Lab 2 report Get Pre-Lab-checked off

Perform experiment from Lab 3 Lab Exercise

Write Lab 3~

Do Pre-Lab frOriiLab 4 Turn in Lab 3 repon Get Pre-Lab Checked off

Perf~experiment from Lab 3 Lab Exercise Write ~ 4-rcport

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Lab 1 Voltage Regulation of a Single Phase Transformer

Objective

The objectiveof this lab is tocorrelate the calculatedvolmgeregulation ofa single phase

transformer with the regulation obServed in the laboratoryt and also to make general observations about transformers L

( 1 Pre-LabJ shy

The laboratory transfonncr is to be used as a 220110 volt transformer (see Figure 1) The series

impedance referred to the 220 volt si4e is approximately (24+j12)0lr

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Figure 1

1 State the voltage and current relaqonships of an ideal transformer t bull 2 List some reasons why real world transformers are not ideal-l

3 Define voltage regulation 4 Assuming a purely resistive lo~d calculate and plot the relationship between secondary

tenninal voltage (V2) and secondary currentmiddot(12) for a 220 voltprimary voltage (VI) and a

maximum secondary current (I2) of2 amps

5 Draw a circuit diagram showing how the relationship between secondary voltage and current can be measured in the laboratory Indicate sources variable loa~ voltmeters and ammeters

Lab Exercise

1 Connect the circuitfrom the Part ~ wiring diagram 2 Record enough readings ofV2 and 12 to compare with calculated values

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Calcul~tions and Comparisions

L 1 Compare the experimental andcal~ulated results 2 eaicul~ thevoltage~gUlatiQn 3 Why was the eXcitatiOn~chnoiincluded in the calculations Did neglecting this excitation

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Lab 1 Wiring Diagram f L-

POVVER PANEL

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l L Lab 2 Load-Speed Characteristic of a DC Motor

Objective

The objective of this lab is to detennine the load-speed characteristics ofa DC motor

rmiddot Part AL

1 The DC machine will be ron as a genetator at a constant speed- The armatureresistance (Ra) will 1 I bull -- becalculate4 to assist in plotting tbeSieed VSla annature current

l t Pre-Lab middotL

smiddot 1

I Calculate a synchronous motors rotor speed (f=60 HzN=120fp) for a machirie with four poles and fora machine with six poles

2 Calculate the value afbaclc emf ltEa) fora DC motor (Ka~ = 6944e-2 VRPM) with arotor

speedof 1800RPM with a rotor speed of 1000 ~ and with a rotor speed of0 RPM 3 Draw a circuit dia~ ofaDC machine connected as a separately excited generator (show

~ -resistance indilctance and voltage the field inductance and resistance~d the variableresistive load) Show how to conneCt a voltmeter to measure armature voltage and bow to connectmiddota ammeter tome8sure annafure current

Laboratory Exercise

L Laboiatmy Setup

1 ConneCt the DC machine as a se~tely excited generator and connect the synchronous mac1rlneas a motor as shown in Lab 2 Part A Wning Diagram

2 Mechnica11y couple the two machineS so that the synchronous motor drives the DC generator 3 Set the synchronous-machine to IND STARTt

bull

4 TurD on the main AC power S Tmn the syncllronoDs machine field voltage (0-150 VDC) to position 3 6 Set the synchronousmachine to $YNCH RUN 7 Make sure the rotor speed is 1800RPM

Laboratoty Measurements

( 1 Measure open circuit armature voltage (back emf) and field cmrent as the DC machina field

1 voltage (D-l25VDc) is increased Use field current (If) increments of about 005 A and vary shy

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If up to 05A 2 Set tbeDCmachin~s fieldvoltage to a value ~atbrings the open circuit annature voltage to

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12SVL 3 Measure the anna~ current (Ialand ~ature vol~ge(Vagt as theresistive load is increased I bull

i Do not exceed an annatme current of2At Record eoughpofuts to ~phtheVa VS In L charaCteristicbull

1 I Ca1culatio~s~amp Questions1shy

1 Plot back emf versus fie1ilCUlTent L

2 Plot ~~ture tenninalvoltagc versus armature current

3 Calculai~ta va1~eforannatureresistance (Ra) from the slope ofVa vsIamiddot - ---~~ ~l 4 ~atPtPose does the synchronous machine serve fot Part A~

Part B

The DC ma9bine will be ron as a DC shunt moftr~ The sPee4vs armaturecurrentchara~tic

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will be mcas1Jtcd andplotted and the effectof anna~ reacnon will be evaluated

Pre~Lab

L 1 DraJithecircuitdiagram ofa DCmiddotshunt motor

1 1 2 Defihe annatitte reaction shy

3 CalcnlateKa~forVt=Ea=125V at 1800 RPMmiddot

4~ Develop a re1ationshipmiddotof speed as a funeti()11 ofannl-~ ~nt Use the values of Vt andL KaW from above and assume that annature reaction is negligible I L

Laboratory Exercise

2 I -- LabomtotySetup t

I i 1 Set the ()lS0 VDCknob to position 3

2 Set the synchronous machine to SYNCH RUNt l

3 Co~ecttbeDCma~hine asa shunt motor and the middotsynchronousmiddotm~hineas a 3-phase ACL

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generator as shownin Lab 2 PartBWiring DIagram 4 Connect the variable three~phase resistive load to the oU1put tenninals of the synchronous)

L machine The resistance of the load will be increased to place a mechanical load on the DC motor (drawing more current through the DC motors armature)

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Laboratory Measurements

1~ U~ouple the two machines 2 Turn on main power 3 Set the PC armature voltage (by using the ~12S VDCknob) to 12SV 4 Adjust~eDC machine field rheostat to obtain a no-load speed of 1800 RPM

s Measure annature voltage and ~ature current at no-load

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6 TUrn theO-l2S VDe knob down to stop the motor (leave the field rheostat as it was set) 7bull Couple the motor andthe gener8m 8 Tmn th~ 0-125 VDe knob up to increas~ armature voltageto 12SyenL 9 Incre~~ the load onthe synchronous gCIieratorbull For each 3-phase load switch record the

annature current and the speedJ L

Calculations 1

L 1 Calculate the power consumed by the DC machine at noload(no-16ad losses)

I 2 Plot speed versus ~ature cocrent (a) from claculatedvalnesusing Rafrom Part A andIa = 0 L- tolS A (b) using experimentaldatagathered in Part B CoIPpare the two plots

3 H themiddotvaIueof Kaclgt decreas~s withhigb~annature current how is the speed effected~

4 How could one explain the ttiffercncesbetween dle experimental and theoretical plots Shouldannature reaction be neglected Use figures andor m~strations to support your answer

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Lab 2P~~t A Wiring Diagram

PQVIER PANa

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Lab 2 Part B Wiring Diagram

POWER PANEL I bull

1 i 0 0 Omiddot 0 0lshy

120VAC 0-24011fOVAo-so-tW t2OVAC MAINAC PAl bull OmiddotSOVDC bull SEC PAL o-125VDC bull SEC tOVAC

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I bull i ~ Thoobjective of this lab is to understand th~ fwidamentals of a 3-phase induction motort-to g

calculate the parameters ofan inductionmotorequivalent circUi~ and to compare the calculated values with measured values L

Pre-La))

(

1 What are the two typeS ofrotOis used mAC inductlonmotorsl t 2 Give theequation for SYDchrono~ speed What is the synhronous speed for a four pole AC ~

L ~d-qctiltgtn~bine (standacent ~efrecFJe~) 3 Define slip for an induction motor If thesynchronous speed is 1800 RPM and the slip (s) is

L 001 what is the rotor speed Ifs == 011 -

l bull 4 Draw a power flow diagram for an AC induction ~otor

5~ middotmiddotDrawatorque VS~ sp~d curve for ail ACinduction motor What is the torqu~ prodnced at synchronous speed (Ns)

6 DescnDemiddot~ no-load test and the blocked rotor ~t for an induction motor Whatis the value ofslip for a Blocked ~otor Test

7 Draw the lEEE-recommended equivalent circuit~ shyL

Calculations C l

l Given the follow~g test results

fLj No-load test Line voltage= 210 V

Linecuxrent iO77 A

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Iiiputpower = 52 W L

I - Blocked-rotor test Line voltage ~ 60V shy tinecu1rent 17 AJ - shy

Input power == 100 W

Also given stator r~tance (Rl) =53 Wphase DL synchronous speed (COsyn) =1885 radlsec

L (R~ember that you are worldngwith a 3-phase machine)

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1 Calculate the parameters of the lEEE-~~ended equivalent circuit 2 Calculate the induction motornopad rotational Io~ 3 CalculateI2t I1t PF Fin Ptiutt Eff and ToutfQrslip v~ues fa11ging from 0 to O~l (with

L step siZe 001) (Pont =Pmech - Prot and Tout = Tmechgt

3 ~lot outputtorque versus speed ~ 4 Plot power factof versusoutput powe~ 5 piot AC)ine current versus outpu~power

i 6 it Plot efficiency versus outPut pow~ shy

LabormiddotatorY Exercise LabgratolY Setup

J

L 1 S~tUP middottheOC machine as a sep~te1y excited generator with variableresistance load bank andthe wo~drotot motor as an indu~on motor to drivemiddotthe DC generator (Connect the

indu~Otimotorstatotwindirigsfu a delta confi8uration) This is shown in the Lab 3 Wiring Diagrallt ~

3 CQ~tXtawattmetet to measure power into the itlductionmotor 4 CoDnectDC meters tomeasure DC generator ~nniDalvoltage and armature current 5 Connect AC ~terStOmeasweline to neutral voltage and line current

j 1

- Laboratoxy Me~ments

J 1 Mechanically conple the induction motor to the DC generator-

2 Bring the 3-phase AC voltage to 120V (line to n~tral) ~ I

i 3 Whenmiddotthe induction mot-or is running (around 1783 RPM) bring the nmiddotc machine terminal ~ ~ ~oi~ uP to 125 V middot

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(lOt andp~~rofone_p~e (WI)bull middot 5 RCCC~d DC generator values values ofvoltage at terminal (VVand armature current (Ia)

6 First take a set ofmeasurements with all the resistance switches off 1 middotTheD continuerecordingmiddotas theJoad is increased up to ACmiddotllne current of 15 A Do not

exceedthis currentlimitl1

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CalctilationS

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~ 1 Calculate values for Pin Pout PF Eff~ atidTout

t Pin=3~Wl ~ shyd

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l PF= WI (Vt(l-n) II)

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f 2 Plot ()utput torgue versus speed ( L- 3 Plotp01l-er fa~torve~u~middot outp~tpoer

4 Plot AC line current v~~outputpower f 5~i Plot~fficl~ncy verSusoutputPQwer L 6 Con1p~ethe ~resu1ts wi~thecalcu1ated results 7 CommeIJton the wisdom ofbuying an indu~on motor having a signijican~ygreaterporse i L power ra~g than iSrequiiedmiddot to dothejob~

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Lab 3 Wiring Diagram

PONERPANa

0 0 0 0 0 120VAC ~laquoNAD4O-4W 12OVoAC MAINC PAl bull o-1atNDC - SEC PAL bull 00121VDC bull SEC 12OVAC

0 ~ 0 0 GJ EJ []] 0 GJ ~ 0 ~ 0

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La) 4 Synchronous Motor

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L Objective

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L The objective of ~ lab is tomiddotexamine the terminal characteristics ofa synchronous motor under - I08(fand no-load conditions

i L

Pre-Lab

i - L 1 Whatisan important feature ofsynchronous motors

~ Dra~ariequivalentcircuit modetfor a synclnypousmotor ShowEf Xs Ra Iat~Vt If and

the fiel~winding 3 Descripe the open-eircuit test ~t is measured What is varied Sketch the circuit 4 Descn1le the short-circuit test Mat is measured What is varied Sketch the circuit 5 Sketehatt open~ircuit ch8rac~riStic aDd a short-circuit charac~eriStic Show Ia (rated) Vt

(rated) a11da modified airgaplineL

Laboratory Exercise f Part A L

The open-circuit and short-circuit tests will be performed to determine values f~r Xs and ~using

LI

the synchronous machine as a generator

Procedure

1 ~ Connect the DC machine as a selfexcited shunt generator 88 shown in Lab 4 Part A ~g

diagram

2 ~ Couple the DC machine to the syn6~nous machine f 3 Set the 0-125 VDCbob to zeromiddot L

4 Set the 0-150 VDC kn~b to zero 5 Set the synchron~us mac~e to INn START e

6 Bring the DC~cbine terminal voltage up to 125 Vt and adjust the field rheostat to obtain a speed of 1800~M

7 Set the sYnchronous machine to SYNCH RUN 8 Perform the open-circuit test With the synchronous machines terminals open measure the

( voltage across the windings (V00) as field current (If) in increased Increase the field current t - by increasing the DC voltage across the field winding Vary If from 0 to lA in increments of

l 9 OlA Set If to zero

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10 Perform the short-circuit test Short the ph~ windings of the synchronous machine and put

i i an ammeter in series with the shorted windings Measuremiddotthe average windingcurrent (Isc) as L

If in increased V~If from 0 to lA in increments ofOlA ( t

i L- Calculations

1 4~middotVt = Voc =120middotVcaJ~ulatcentmiddotXs and K(Xs =Voc IIsc andK= Voc I If)

2 P16tIIalvs If~(IIal =1Vt--KIf) I Xsi ) t L Part Bmiddot L The annatuIecurrentwill be measured agfield current is varied under loadmiddot and no loadconc1itions

L-

-

1 Connectfh~sySte~ as sbownin the Lab 4 Part Bwiring diagram but do not couple the syn~~riq~-~tiinetothe DC machine~

2 Senhe~chronousmac~to lND STARr 3 Thin tbe6-1S0vnpknobto position cO5~

4 TumODmailtpoiVer

( S S~ the synclnpnbusmachine tq ~YNCH RUN The motor speed should be 1800 RPM L 6 MeasureIa andItas If is varief1 up to lA

Load Procedure shy

1 TUm offmain power 2 Mechanically couplethe synchronous machine to the DC ~hine

3 Set~~ first nine switches of the resistance load to ON ) 4 Setthe-~chrononsmachine to lND START L

5 Turno~middot-m~~wer

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1~ 6 Tuni the~o-lS0VDCknob to position 20bull

~ 7 Settheo-l25VDCknobtoposition pound9 tbull

8 Set the synchronous machine to SYNCH RUN The motor speed should be at 1800 RPM 9bull Measure Ia and Ifas Ifis varied up to lA

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Calculations L

1 Plot Ia V8 If for load and no load conditions and compare with c~cu1ated graph

2 Is there a best~fieldcurrent at which the synchronous machine should be operated

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Lab 4 ~art A Wiring Diagram

POWER PANEL

middot0 0 o o PAl bull Ql25VOC bull sec 120VAC120VAO 0--240114OVACJJ44W 120VAC

o0 [~l 0 ~ o0 ~ ~ AB C NON ABC N + bull

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SERI~S100 OPERATINGINSTRUCTIONS amp bull ~

MODEL WRM-100-3A WOUND-ROTOR MOTOR

GENERAL The WRY-100-SA is a three-phase four pole wound-rotor motorconsisting of a stator winding and a rotor winding withldip rings and brushes A three-pole

~ circuit breaker ~ also provided in the termm81 box The nominal ratings of the motor ari~ circuit breaker are listed below r

1 J l-- SPECIFICATIONS MOTORL

WmdingTypeshy Wound Btafor amp Rotor Horsepower shy 13HP Speed shy 175QRPM Voltage bull 20SV bull Sf Amiddot or 860V-s+Y

I Frequency- 60Hz L- Rating Continuous

Full Load Current bull 17 Amps

CIRCUIT BREAKER

Type of Operator bull Rocker Switch L No of PoleS bull Three

Overload )pe bull Thermal Trip Rating shy 2DAmpS Reset Method - middotOW- to Reset

r I - shy OPERATION To operatethe ~-l00-SAas an induction motor make the connections shown

in Figure L Rotate the Wound Rotor Speed Control ~b to the maximum resisshytance fttn~ counterclockwise direction With all th~ ~ce in the rotor cir middotcai~ the motor-willdevelop maxirilum starting torque and minimum ~g curshy

rent Pwih up the rocker switch on the circuit breaker~ startmiddottqemotorbull The motor will accelerateup to speed The rheostat providesthe mSansofv~g theL motors lQieedtorque characteristicS The effect of the rlieostat increUes with increasing load onthe motorr ~

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WRM-10o-3A

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A 6 C AC INPUT SI1PPLY

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S12 520

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WRSe-100

FIGURE 1

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GENERAL

SPECIFICATIONS

middotMODEL SMmiddot100middot3ASYNCHRONOUS MACHINE

ThemiddotSMmiddotI00-8A is a three-phase four-pole machine consisting of a wyedel~ stashytor andmiddot 8 quadrature rotor having a DC field winding and a damper winding A three-pole circUit breaker and a IND START-BYNC RUN switch are provided in the terminal OOx- RatingS fonow

SM-100-3A MOTOR ampALTERNATOR

Speed - 1800 RPM Voltagemiddot Max Ambient Temp Insulation bull Rating bull

CIRCUIT BREAKER

Type of~tor shyNo ofPoles bull Overload Type bull Trip Rating bull Reset Methoa shy

ALTERNATOR

Power-Load Current bull Fielti Excitation shy

MOTOR

HorSepowershyCurrent bull Frequencyshy

208120V-B+-4W 4~ (1047) ClassmiddotB Continuous

Rocker Three Thermal L7amps

middot middotOFF to Reset

250 watts 07 amp (nominal) Separate L6 amps

18 HP 17 Amps 60Hz

ENGINEERING COAPORATION --~-MANUf~RpoundRS~ EQUIPMENT lOR EDUCATION ANO INDUSTRY

Po Box 563 East Lon~~dow~ O~028 (413) 525-3981 bull 1tX95-S426 bull Pax (413) 525-4741

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OPERATION Th~ proper connections tor operation of th~ SMl00-SA ~ a ~clttonous (SYNCHRONOUS motor are shown in Figure middot1 With ~ ~tebin the SYNC RUNposiliou MOTOR) ~ze the vari~ble DC supply and adjusttbe~tput voltage from zero up to

th~ value which eauses 1 amp to flow through the rotor ~turn the switch to the lNDSTART PO$ition middotand Start the motor by toggling~becircuit breaker to

the ONposltion WJten the motor reaches DO lQad 1ij)eeC1 move the switch to the SYNC RUN posItion The rotor will then sYnchronize with the nn~ and fJ1e motor wiD be ti1mrlng at exactly 1800 RPvL Used to demonstrate the Wrious ~tics of synclirOnous motors

+VARIABlpound DC

_sUPPLY

STATOR ROTOR middotL1middot 11 A~~-eJ-----CJ

middot AC u l 12

~~YB~T middotJ3~T3

ct-O--ltr

VARIABLE + DC SUPPLY

FIGURE 1 SM-10o-3A AS A SYNCHRONOUS MoioR

ABC AC SUPPLY INPUT

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OPERATION The proper ampinn~~ fo~ operation or the SM-l00-SA as an alternator are ALTERNATOR) shown in Fi8Ure ~ With tliese connections made and the switch in the SYNCL RUNposition drive the alternator at 1800 RPM With a sUitable prime mover

Energize the DC Voltage supply and increase thesupplys output to bicrease f themiddotslternatorts output voltage to the desired value Toggle the circuit breaker ~L ~ tlie ON pPSition to connect the alternators output to the load Used to

middotdemonstrate the characteristics of a polyphase alternator of the stationary arshyr mature typebull ~t may also be used asthe loading device when testing the varishyI oUsmotom- shy

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OUTPUT

rmiddot~ FIGURE 2 L SM-10o-3A AS AN ALTERNATOR

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SERJES100 OPERATING INStRUCTIONS

oMOoDEL DMmiddot1 DDA DC MACHINE

GENERAL The DY-10OA is amiddot two-pole compound-wound machine ~g of a shunt field a series field and an armature winding A shunt fie1dmiddotr~t and two-pole startel switM are also provided in the-terminal box ~tings follow

SPECIFICAnONS

MACHINE

Shunt Field Ex SepO5A 125V Insulation CJass F middotMax Ambient Temp 40 ~C (104 OF) Rating Continl101iS Speed 1800 RPM nominal Shunt Series Compound wo~dJl1Otcr

125V SOAt 18 HP Shunt Series Compound wound generator

RHEOSTAT

Resistance Power Current middot Taper Fuse Minimum Resistance Position

STARTER

Type of Operator No of Poles Overload Type Trip Rating middot Reset Method

125V 2A 250KW

800~Ohms

100 Watts O575middotAmps Lin ear 1A SJo Blo

Toggle Two Thermal 4lAmps Push Toggle down

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L FUNCTION The primDrJ function or the DC motor is to demonstrate the characteristics of

shunt series ancl compOund motors~ It IIl8Y also bemiddotutiHzed as a prime mover when testiJlg a gel1eraloror alternator Using the DCmiddotmotor tor this PurPose has the advantage th~tbe speed may be held constant bymiddot8djusting tJie shunt field rheostat after each load step is applied

L OPERATION The -proper connections for operation as a ClUDulative compound DC motor are

(DC MOTOR) shOWDin Fipre i Withmiddot theseoonndionS made the motor may be started by moving the starter switch toggle up to the ON position It is good praetioe to stad the motor with the shunt field rh~ in its minimum resistance fully COW position to provide m8amum starting torque andmiDitnum starting Curshy

L rent The motor may then be adjusted ~ the desired speed byadjUBtingtbe field rheostat or varying the line voltage

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1 125VDO SUPPLY

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FUNCTION The DC generator is p~arily utili2ed to demonstrate the characteristics of shunt series ~dCOinpound gen~tors It is~ alsOusedastlle loading device

when testing the vari~us motors

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OPERATION The~CODnections tor operation as a cmnulative C()~po1l1ld nCgenshyeratorareshown in Figure 2 With these connectio~middotmiddotDltldeJ drive theJDCmiddotGENERATOR gen~-atapproxhnately1800RPM with a suitable p~e moVer With thefie1qrheostatJnits Jll8Ximum resistance fullyc1ocm~ position enshyergiZe thel15V DC field supply Rotate the field rheostatinthecltunter

shy clockwisedir$ctian middottoinCreasemiddot the output voltage middotto the desiredmiddot value Switch Oti~middotthemiddotoverloadmiddot switChmiddotto connect the generators output to the

resistance load

+ 1151 DC - 230 W

OUTPUT

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MODEL MGmiddotBmiddot100DG BEDPLATE f

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The MG Bedplateconsists of a heayy s~ baBe n10~~middotmiddoton vibration pads The

I - GENERAL

function otthe bedplate is toe~le the quickmounting ~dcoup1mg of the two individ~ macbiDoes to form a completemiddotmiddotm~ior-Pnerator setpwothreaded hpldshy

~ down)1Ocks ~d winged screwsareprovidecltoseeurethe F t claJnps which hold tbeinBcbinetsmounting boards A couplingguard and two shaft ~gwrrds are p~

r vided to p~ttheSiudenttrom accidet1talJito~gor~~gwires0l1 rotatshy- shy ing)arts The guardsmiddotare quickly mounted bY insertirig retamer CUpS in~T~9tsin

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The procedure for mou~ting and ioupling the machines to the base is as fon~

L 1 A~just each wing screw 021- ~e two screw clamp hold~ownmiddot ~locks to the top of its threaded stud - 0

i 2 Place each ~chine so that the rear of the base is reSting agairistmiddotthemiddot thd rear clamp on thei L- MGbasemiddot

8 Slide machines iJiboara until ~elrcouplingl1anPs are centered oVer cen~ slots 4 bert rub coupnngmiddotsleevemiddot~toone of the mac1dnes co~pling 1IimgM~ L

5 Slidere~jning machines coupling flange into-the other side of couplbig sleeve 6 Checktobe Sure thatmiddot~e couplhig guard will cOver coupling when insertedmiddotinto one ot thel pails areenter slotsmiddot 7 plaCe front clamp tor each of machines against the front or the two macbiD5t bases

(- s 8 F~pr tighten ~~uts 9it middotthe two screw clamp hold-down biocks Lmiddot 9 Mount coUplini aDd shaft guards by locating appropriate retainer clips in slotS so that coushy

pling is ~der co~Ung guard and ~ sh~ is covered by a ~haft guatdL

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SERIES 100 -OPERATINGINSTRUCTIONS

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MODIL1-10oaA TRANSFClRfJIER OEMONSTRATOR

GENEijAL The TlOO-8A~~ts of three Single-phase bansformers wit~ m11Jtiple primary and secondary taps terminated atpinreceptacl~on the front of the unit Each of the three ~rOrinersmay beused independen1q Or the threemay~interconmiddot

f nected mseries~1npQmneJ or inmiddot many poJyph8seCbnfigurations

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EacbtraDslormer is~~middot af)vol~amperesat 60 Hertz ~ has two primary~d

two secoDdaqwindiIlBL Each ofthe priD1817 windiD~1tas800 turns of Nobull 24 gauge-wire and JSmiddotm~-120volta 05 amperes Onewhidingis tapped at 82 volts toprovide~~middotS~tttllp~(866$)middot~fthemiddot twomiddotwiDd1np~ 68ri~ Each or thesecondshylQ7middotwindh1pmiddot1uIs100t11rns of No 21 gauge wire and israted 60 volts 10 ampere One winding Js tappbd atmiddotlaquo volts to p~vide a Scott tapor the two windings in series Shownbelow are the voltage ratings orthe various taps for each of the three traDspoundormers

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middotSEmiddotRIES 100OPERATING INSTRUCTIONS

t bull MODEL middotRLmiddot100AmiddotRESISTANC~LOAD J J- shy~ GENERAL The RL-IOOAfs variable ftsistance unit used to applya resistivel0a4middottogenera

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tors or altemators One unit may be used in single-phase applications ora bank L of tlmae units may be combhled intQ Wye or De1taCOnt1IJDlt1~DS tor three phase

applicmioDS TiieRL-lOOA mttoduces resistieload~ ~sequentild steps r designed to prod11CB approximateiy equal ipcremeJlts otJoadmiddot~tmiddot The SPST f ~ toigle switches are numbered andmiddot must be cloSed in nUD1erl~ordertodecrease

totlreslstance~creasmglOad The total ~cemiddot or the cOb~ected~rs ( may be COmputed f~theequation L

middot 1 1 1-1 ~=R1+Ri+lt8middotmiddotmiddot

The ConowingO equations may be used to detemUne the power disSipated from a measurement of load currentor voltage

L P=EI = = I~

p (ampp) = 8 xEpBPH (tor balanced ioad)

Where P=P~inWatb

E =yoltage inVolfB I = Currentin Amperes

f R =Resistance in Ohms L P(Stp) =middotmiddotTotalPower for Three-Phase

~H ==~ Voltage per Phase~r Load Bankf L bull IpH = Ourrent per Phase ofLoad Bank ampshy

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FROM AC OR DC SOURCE

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3f1 SOURCE

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~ SERIES 100 OPmiddotERATmiddotING INSTRUCTIONS

MODEL RLC-100RESmiddotISTANCE-REACTANmiddotCE LOAD

The RLCl00 ismiddota variable resistance and--reactance- (either ~ductive or capaci- tive) uDit that ~y be used _to apply a singl~plmse or a three-phase load The remstive load (w~ can be ~ for both middotACcd DC) is controDed by siz SPST toggle switches e8ch of which puts 2000 ohlnaof resistance in paraDelmiddot lor all three phases simultaneouslybullThe resistive-load is therefore always balanced The total resistance in eacli ph8se equals 2000- ohms divided by the Dumber of switches closed For example with two sWitehesclosedtbe total resistance-is 1000 ohms rith aUsiZ closed 8888 ohms Each or the three reactance loads (used forAC o~) separateVfused at 1 amp is controlled by a knob that varltlSthe degreeopound lead andmiddot l8g A clockwise rotationof the middotknob applies leadiIlg pOwer factor (cashypaCitive)loid while a counterc1~ rotation appIiesa lagging power factor (inductive) load There is DO lpadapplied whenthe-knob is in mid position

The 8-4-5 right triangle graph below may bemiddot~ to approximate a O~8 power factor leading or lagging

1 Appfi a resistiVe load 2 Readthe in-phase current h from -the ammeter 8 From the lR value on tlie horizontal base of the graph travel vertically to the

point where it intersects the 08 PF (total amps) line 4 Frommiddotthis point travel horizontally to the reactive current wlueIz 5 Adjust the ~ve load until the Ix ammeter reads this value of reactive cur

rent

6 To obtain a ~ced load in a three-phaseconfigaratioD repeat Step -5 for the other two~

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-7 97 HefJry

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DIAL POSITION CAPACITANCE (CLOCKWISE)

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2 316 J1F

3 501Jlf

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5 80~J1f

6 985 j1f 7 1160middotpF

8 1360J1Fmiddot

9 1609middotJ1F

10 18~JtF

11 2007~middotF

12 2170 fLF

13 2513 )iFmiddot

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SERIES 100OPERATING INSTAUCTIONS L

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MODJL ACVA-10()ACMETERINGPANEL L GENERAL The HAMPDEN Model ACVA-1OO consistsmiddotol two AC ammetem and one AC voltshy

meterA11 or the meters are dioaeprot8cted against overloads as high 1Ui 1000f

The ~ltmeter islicctt8 within 8 w1UIemiddotthe ammeters are accurate wi~hin ~ plusmn29D ormiddotfWl sCale dellection The middotme~rshave the following ranges

r I AC Voltm~teI Oto l00~OO V~ts ~ AC Amme~ OtlJQ5f2f4l8-Amps

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OPERATION

AC AMMETERS

L 1 Connect the ammeter in series so that the middotentire AC current to be measured passes

I through the ~~ter The test lead from the dark blue middotbindingpostis connected to one

side or the Dne and the test lead trom the Qrange bin~ post to the other ~ L

2 ~e choice or measuring range is iet with the range switch Fourmiddotranges are avaiiable O 05 0204 an~ 0 - 8 amperes

8 Set the rangemiddotswitch on the 8 ampere range Detore turning on the power

a) When ~ to measure motor current put a jumper lead between the tWo binding poststo protect the movement from the large inrushcurrent at start This jumper is

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removed after the motor has started

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MODELACWM-1 GO WATIMETER PANEL

GENERAL The1iAMPDEN Model ACWMmiddotI00 consists artwo Iilulti-rangewattmeters and

I tbe~tchesh-lh~r operation Eacli has ~e follOwing ranges l

)to 1~30016~1200W

(150300Volts 2148 Amps)

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OPERATION Measure wattage bymiddotconn8cling a wattmetervoltmeter andmiddot~ete~8sshownin Figtt81 The ~-MPstttOn mustO be~middotconn~middotin series- with the ioad and-the

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VQTS con mUstmiddotbeqo~n~middotiJ1 prU9l1elwith the load protected against overloads by diodes

The Otlrrent~Coils are

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-FIGURE 1 WATTMETER CONNECnONS 14IJ -- -

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Each wa~eter has tWomiddot Voltage mtinp (150 and- 800V)~ Rotating the range -switclirounterciOCkwise from OFF engages the 150 volt range Rotatmg the _range SWitch clOQkwise from O~ engages the 800 volt range Utilize the Voltmeters readiDg to determine the approprlllte-range

Each wattmetermiddot has three currentmiddot ratings (2 4 and SA) Rotating the range swiJchfrom middotO~engages the Samprarigefbst ~ the wattm~termiddotreadsbelow ~r 8Cll18 and the ammeter indicates that the 4 amp rating will not be ~e9 ~ectmiddotthe 4 ainp range-middot If the mttnie~ again reads below balt scaie and the ammeterindicates that the 2 amp rating will no~ bemiddot exceeded the 2 amp range may bese1ectedI

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L FIGURE 2 WATTMETER CONNECTIONS 3fi1

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L middot The totalwatbge is the sum of the two meter readings PI and P2

f When pow~ in a ~ced load is m~ured in this ~er the indication or the 1

two ~eterS VlLL~PT be the same except at 1D1ity power factor middot -shy

When the power factor of the circuit is less than 509b the pointer of meter PI will reverse~ To obtain total wattage in this case reverse the current connections to metet Pl -then subtract the rea~g ormeter PI from that of meter P2

The twO-wattmeter~method cannot be used with as-phase 4-wire load Three wattmeters are ~ in that case

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POWER FACTOR i f ~

Given a balallCed load the~oWer tacentor middoteanbe -d~emiined from the two wattmeter mth6cL - ~

L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

J be calca1ated -from-the -following_equation0

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tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

wherep2 repr~ts th~~ier~thetwoWl1ttiJ1~ re~ingswhentbepower faeto~l~other thaD uPity

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BiDet th~powertaetb~ 8q1alsthcosme ofthephaseangletP~powerfactor may also be I deterJninedfromtheratioo~thetwo wittmeterreadings middotmiddotThegraph b~ow shows the1 I

I relationship between themiddotpowerfacior andth~ratio~f P1lP2 ~

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MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

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L OPERATIONI

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DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

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agt If the currePtis~ter than 5 amperes the needlewDI move off-scale TuRN OFF POVER IMliEDIATELY AJf exception to this may be on motor starling Momenshytary current inrushbullmay exceed 5 ampe~ but theneedleiminediately drops back to normal

b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

L

1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

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a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

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MODEL-1723 rACHoME~R

DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

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MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

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f bull -Vari8bleO ~ 150vnQ-i~(lA isolated l~RMS L bull Variable 0 ~ 125VDCt 5Q -isolated ItlmiddotRMS middot

OPEBATIONTouSe the powermiddotpanelt (lISt tum ON ~MAIN AC circuit breaker~i This will m~tethemain AC pnot Hght and 9nergize the four-pin ~Pyen~i supplying fix~208120VAOtliree-phase poWer Th~ other 1ixed~d~Je sulpHes may

l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

cuit ~~ (both ~ ~ncl BEc) A clockwise lOtation of the vol~cpntro1 -- ~ ~eause ~~~~the voltage a~ble at the appropriate 1~Ptashy

L I tNOTE ~~ ~~ltage oo~~lbob fOr the 0-208120V three-phase sUpply is ~ted at the ~nd or the

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IfanY~r~es11PplifSri-e~vefloaded one or more circuit breakers may trip middotOFF Al- ir ways turnthemiddotVariable suppllesto zero and remove the C8usaopound the oyerload before resetshy

JL ting the circuitmiddotl~~em

A pindiilg ~ groun4 oenn~oDis proVided at each end or the panel fOrgrounding the rotating macbin~

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Page 4: [1 Table D. - UTKweb.eecs.utk.edu/~jsl/ECE325/ECE325-LabManual.pdfLab #2 Load-Speed Characteristic of a DC Motor . Objective . The objective of . this . lab is to . detennine the load-speed

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Before Lab Meeting 1 Lab Meeting 1

Before Lab Meeting 2 Lab Meeting 2

Before LabmiddotMeeting 3

Labmiddot Meeting 3

Before Lab Meeting 4

Lab Meeting 4

Before Lab Meeting 5

Lab Meeting S

Lab Schedule

Review the Lab Eq~ipment sheets in the back of the manueL Introduction to the Lab

Do Pre-Lab from ~ 1 Part AshyGet Pre-Lab checked off -Penonn experiment from the Lab Exercise

Write Lab 1 report Do Pre-Lab from-Lab 2 Dont forget Parts A amp-Bl Turn in Lab 1 repOrt Get Pre-Lab check~ off PerfOnn experiment from Lab 2 Lab Exercise

Wrlte~b 2 report Do Pre-Lab from Lab 3 TUm in Lab 2 report Get Pre-Lab-checked off

Perform experiment from Lab 3 Lab Exercise

Write Lab 3~

Do Pre-Lab frOriiLab 4 Turn in Lab 3 repon Get Pre-Lab Checked off

Perf~experiment from Lab 3 Lab Exercise Write ~ 4-rcport

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Lab 1 Voltage Regulation of a Single Phase Transformer

Objective

The objectiveof this lab is tocorrelate the calculatedvolmgeregulation ofa single phase

transformer with the regulation obServed in the laboratoryt and also to make general observations about transformers L

( 1 Pre-LabJ shy

The laboratory transfonncr is to be used as a 220110 volt transformer (see Figure 1) The series

impedance referred to the 220 volt si4e is approximately (24+j12)0lr

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Figure 1

1 State the voltage and current relaqonships of an ideal transformer t bull 2 List some reasons why real world transformers are not ideal-l

3 Define voltage regulation 4 Assuming a purely resistive lo~d calculate and plot the relationship between secondary

tenninal voltage (V2) and secondary currentmiddot(12) for a 220 voltprimary voltage (VI) and a

maximum secondary current (I2) of2 amps

5 Draw a circuit diagram showing how the relationship between secondary voltage and current can be measured in the laboratory Indicate sources variable loa~ voltmeters and ammeters

Lab Exercise

1 Connect the circuitfrom the Part ~ wiring diagram 2 Record enough readings ofV2 and 12 to compare with calculated values

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Calcul~tions and Comparisions

L 1 Compare the experimental andcal~ulated results 2 eaicul~ thevoltage~gUlatiQn 3 Why was the eXcitatiOn~chnoiincluded in the calculations Did neglecting this excitation

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Lab 1 Wiring Diagram f L-

POVVER PANEL

0 0 0 0 0 12OVACtaoYAC 002401t~ AC4O-o4W ~AC At AI PAl bull oSOVDC bull sec PRJ bull UVDC bull sec

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l L Lab 2 Load-Speed Characteristic of a DC Motor

Objective

The objective of this lab is to detennine the load-speed characteristics ofa DC motor

rmiddot Part AL

1 The DC machine will be ron as a genetator at a constant speed- The armatureresistance (Ra) will 1 I bull -- becalculate4 to assist in plotting tbeSieed VSla annature current

l t Pre-Lab middotL

smiddot 1

I Calculate a synchronous motors rotor speed (f=60 HzN=120fp) for a machirie with four poles and fora machine with six poles

2 Calculate the value afbaclc emf ltEa) fora DC motor (Ka~ = 6944e-2 VRPM) with arotor

speedof 1800RPM with a rotor speed of 1000 ~ and with a rotor speed of0 RPM 3 Draw a circuit dia~ ofaDC machine connected as a separately excited generator (show

~ -resistance indilctance and voltage the field inductance and resistance~d the variableresistive load) Show how to conneCt a voltmeter to measure armature voltage and bow to connectmiddota ammeter tome8sure annafure current

Laboratory Exercise

L Laboiatmy Setup

1 ConneCt the DC machine as a se~tely excited generator and connect the synchronous mac1rlneas a motor as shown in Lab 2 Part A Wning Diagram

2 Mechnica11y couple the two machineS so that the synchronous motor drives the DC generator 3 Set the synchronous-machine to IND STARTt

bull

4 TurD on the main AC power S Tmn the syncllronoDs machine field voltage (0-150 VDC) to position 3 6 Set the synchronousmachine to $YNCH RUN 7 Make sure the rotor speed is 1800RPM

Laboratoty Measurements

( 1 Measure open circuit armature voltage (back emf) and field cmrent as the DC machina field

1 voltage (D-l25VDc) is increased Use field current (If) increments of about 005 A and vary shy

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If up to 05A 2 Set tbeDCmachin~s fieldvoltage to a value ~atbrings the open circuit annature voltage to

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12SVL 3 Measure the anna~ current (Ialand ~ature vol~ge(Vagt as theresistive load is increased I bull

i Do not exceed an annatme current of2At Record eoughpofuts to ~phtheVa VS In L charaCteristicbull

1 I Ca1culatio~s~amp Questions1shy

1 Plot back emf versus fie1ilCUlTent L

2 Plot ~~ture tenninalvoltagc versus armature current

3 Calculai~ta va1~eforannatureresistance (Ra) from the slope ofVa vsIamiddot - ---~~ ~l 4 ~atPtPose does the synchronous machine serve fot Part A~

Part B

The DC ma9bine will be ron as a DC shunt moftr~ The sPee4vs armaturecurrentchara~tic

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will be mcas1Jtcd andplotted and the effectof anna~ reacnon will be evaluated

Pre~Lab

L 1 DraJithecircuitdiagram ofa DCmiddotshunt motor

1 1 2 Defihe annatitte reaction shy

3 CalcnlateKa~forVt=Ea=125V at 1800 RPMmiddot

4~ Develop a re1ationshipmiddotof speed as a funeti()11 ofannl-~ ~nt Use the values of Vt andL KaW from above and assume that annature reaction is negligible I L

Laboratory Exercise

2 I -- LabomtotySetup t

I i 1 Set the ()lS0 VDCknob to position 3

2 Set the synchronous machine to SYNCH RUNt l

3 Co~ecttbeDCma~hine asa shunt motor and the middotsynchronousmiddotm~hineas a 3-phase ACL

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generator as shownin Lab 2 PartBWiring DIagram 4 Connect the variable three~phase resistive load to the oU1put tenninals of the synchronous)

L machine The resistance of the load will be increased to place a mechanical load on the DC motor (drawing more current through the DC motors armature)

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Laboratory Measurements

1~ U~ouple the two machines 2 Turn on main power 3 Set the PC armature voltage (by using the ~12S VDCknob) to 12SV 4 Adjust~eDC machine field rheostat to obtain a no-load speed of 1800 RPM

s Measure annature voltage and ~ature current at no-load

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6 TUrn theO-l2S VDe knob down to stop the motor (leave the field rheostat as it was set) 7bull Couple the motor andthe gener8m 8 Tmn th~ 0-125 VDe knob up to increas~ armature voltageto 12SyenL 9 Incre~~ the load onthe synchronous gCIieratorbull For each 3-phase load switch record the

annature current and the speedJ L

Calculations 1

L 1 Calculate the power consumed by the DC machine at noload(no-16ad losses)

I 2 Plot speed versus ~ature cocrent (a) from claculatedvalnesusing Rafrom Part A andIa = 0 L- tolS A (b) using experimentaldatagathered in Part B CoIPpare the two plots

3 H themiddotvaIueof Kaclgt decreas~s withhigb~annature current how is the speed effected~

4 How could one explain the ttiffercncesbetween dle experimental and theoretical plots Shouldannature reaction be neglected Use figures andor m~strations to support your answer

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Lab 2P~~t A Wiring Diagram

PQVIER PANa

0 Omiddot 0 0 0 12fNNJ t2OVAC MAlHAC PAt bull ot5OVDC bull SEC PAl bull o12SVDO bull SEC 12OVAC~~W

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Lab 2 Part B Wiring Diagram

POWER PANEL I bull

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120VAC 0-24011fOVAo-so-tW t2OVAC MAINAC PAl bull OmiddotSOVDC bull SEC PAL o-125VDC bull SEC tOVAC

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calculate the parameters ofan inductionmotorequivalent circUi~ and to compare the calculated values with measured values L

Pre-La))

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1 What are the two typeS ofrotOis used mAC inductlonmotorsl t 2 Give theequation for SYDchrono~ speed What is the synhronous speed for a four pole AC ~

L ~d-qctiltgtn~bine (standacent ~efrecFJe~) 3 Define slip for an induction motor If thesynchronous speed is 1800 RPM and the slip (s) is

L 001 what is the rotor speed Ifs == 011 -

l bull 4 Draw a power flow diagram for an AC induction ~otor

5~ middotmiddotDrawatorque VS~ sp~d curve for ail ACinduction motor What is the torqu~ prodnced at synchronous speed (Ns)

6 DescnDemiddot~ no-load test and the blocked rotor ~t for an induction motor Whatis the value ofslip for a Blocked ~otor Test

7 Draw the lEEE-recommended equivalent circuit~ shyL

Calculations C l

l Given the follow~g test results

fLj No-load test Line voltage= 210 V

Linecuxrent iO77 A

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Iiiputpower = 52 W L

I - Blocked-rotor test Line voltage ~ 60V shy tinecu1rent 17 AJ - shy

Input power == 100 W

Also given stator r~tance (Rl) =53 Wphase DL synchronous speed (COsyn) =1885 radlsec

L (R~ember that you are worldngwith a 3-phase machine)

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1 Calculate the parameters of the lEEE-~~ended equivalent circuit 2 Calculate the induction motornopad rotational Io~ 3 CalculateI2t I1t PF Fin Ptiutt Eff and ToutfQrslip v~ues fa11ging from 0 to O~l (with

L step siZe 001) (Pont =Pmech - Prot and Tout = Tmechgt

3 ~lot outputtorque versus speed ~ 4 Plot power factof versusoutput powe~ 5 piot AC)ine current versus outpu~power

i 6 it Plot efficiency versus outPut pow~ shy

LabormiddotatorY Exercise LabgratolY Setup

J

L 1 S~tUP middottheOC machine as a sep~te1y excited generator with variableresistance load bank andthe wo~drotot motor as an indu~on motor to drivemiddotthe DC generator (Connect the

indu~Otimotorstatotwindirigsfu a delta confi8uration) This is shown in the Lab 3 Wiring Diagrallt ~

3 CQ~tXtawattmetet to measure power into the itlductionmotor 4 CoDnectDC meters tomeasure DC generator ~nniDalvoltage and armature current 5 Connect AC ~terStOmeasweline to neutral voltage and line current

j 1

- Laboratoxy Me~ments

J 1 Mechanically conple the induction motor to the DC generator-

2 Bring the 3-phase AC voltage to 120V (line to n~tral) ~ I

i 3 Whenmiddotthe induction mot-or is running (around 1783 RPM) bring the nmiddotc machine terminal ~ ~ ~oi~ uP to 125 V middot

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(lOt andp~~rofone_p~e (WI)bull middot 5 RCCC~d DC generator values values ofvoltage at terminal (VVand armature current (Ia)

6 First take a set ofmeasurements with all the resistance switches off 1 middotTheD continuerecordingmiddotas theJoad is increased up to ACmiddotllne current of 15 A Do not

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CalctilationS

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~ 1 Calculate values for Pin Pout PF Eff~ atidTout

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l PF= WI (Vt(l-n) II)

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L Tout= Pout6012nN

f 2 Plot ()utput torgue versus speed ( L- 3 Plotp01l-er fa~torve~u~middot outp~tpoer

4 Plot AC line current v~~outputpower f 5~i Plot~fficl~ncy verSusoutputPQwer L 6 Con1p~ethe ~resu1ts wi~thecalcu1ated results 7 CommeIJton the wisdom ofbuying an indu~on motor having a signijican~ygreaterporse i L power ra~g than iSrequiiedmiddot to dothejob~

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Lab 3 Wiring Diagram

PONERPANa

0 0 0 0 0 120VAC ~laquoNAD4O-4W 12OVoAC MAINC PAl bull o-1atNDC - SEC PAL bull 00121VDC bull SEC 12OVAC

0 ~ 0 0 GJ EJ []] 0 GJ ~ 0 ~ 0

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La) 4 Synchronous Motor

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L Objective

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L The objective of ~ lab is tomiddotexamine the terminal characteristics ofa synchronous motor under - I08(fand no-load conditions

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Pre-Lab

i - L 1 Whatisan important feature ofsynchronous motors

~ Dra~ariequivalentcircuit modetfor a synclnypousmotor ShowEf Xs Ra Iat~Vt If and

the fiel~winding 3 Descripe the open-eircuit test ~t is measured What is varied Sketch the circuit 4 Descn1le the short-circuit test Mat is measured What is varied Sketch the circuit 5 Sketehatt open~ircuit ch8rac~riStic aDd a short-circuit charac~eriStic Show Ia (rated) Vt

(rated) a11da modified airgaplineL

Laboratory Exercise f Part A L

The open-circuit and short-circuit tests will be performed to determine values f~r Xs and ~using

LI

the synchronous machine as a generator

Procedure

1 ~ Connect the DC machine as a selfexcited shunt generator 88 shown in Lab 4 Part A ~g

diagram

2 ~ Couple the DC machine to the syn6~nous machine f 3 Set the 0-125 VDCbob to zeromiddot L

4 Set the 0-150 VDC kn~b to zero 5 Set the synchron~us mac~e to INn START e

6 Bring the DC~cbine terminal voltage up to 125 Vt and adjust the field rheostat to obtain a speed of 1800~M

7 Set the sYnchronous machine to SYNCH RUN 8 Perform the open-circuit test With the synchronous machines terminals open measure the

( voltage across the windings (V00) as field current (If) in increased Increase the field current t - by increasing the DC voltage across the field winding Vary If from 0 to lA in increments of

l 9 OlA Set If to zero

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10 Perform the short-circuit test Short the ph~ windings of the synchronous machine and put

i i an ammeter in series with the shorted windings Measuremiddotthe average windingcurrent (Isc) as L

If in increased V~If from 0 to lA in increments ofOlA ( t

i L- Calculations

1 4~middotVt = Voc =120middotVcaJ~ulatcentmiddotXs and K(Xs =Voc IIsc andK= Voc I If)

2 P16tIIalvs If~(IIal =1Vt--KIf) I Xsi ) t L Part Bmiddot L The annatuIecurrentwill be measured agfield current is varied under loadmiddot and no loadconc1itions

L-

-

1 Connectfh~sySte~ as sbownin the Lab 4 Part Bwiring diagram but do not couple the syn~~riq~-~tiinetothe DC machine~

2 Senhe~chronousmac~to lND STARr 3 Thin tbe6-1S0vnpknobto position cO5~

4 TumODmailtpoiVer

( S S~ the synclnpnbusmachine tq ~YNCH RUN The motor speed should be 1800 RPM L 6 MeasureIa andItas If is varief1 up to lA

Load Procedure shy

1 TUm offmain power 2 Mechanically couplethe synchronous machine to the DC ~hine

3 Set~~ first nine switches of the resistance load to ON ) 4 Setthe-~chrononsmachine to lND START L

5 Turno~middot-m~~wer

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1~ 6 Tuni the~o-lS0VDCknob to position 20bull

~ 7 Settheo-l25VDCknobtoposition pound9 tbull

8 Set the synchronous machine to SYNCH RUN The motor speed should be at 1800 RPM 9bull Measure Ia and Ifas Ifis varied up to lA

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Calculations L

1 Plot Ia V8 If for load and no load conditions and compare with c~cu1ated graph

2 Is there a best~fieldcurrent at which the synchronous machine should be operated

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Lab 4 ~art A Wiring Diagram

POWER PANEL

middot0 0 o o PAl bull Ql25VOC bull sec 120VAC120VAO 0--240114OVACJJ44W 120VAC

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SERI~S100 OPERATINGINSTRUCTIONS amp bull ~

MODEL WRM-100-3A WOUND-ROTOR MOTOR

GENERAL The WRY-100-SA is a three-phase four pole wound-rotor motorconsisting of a stator winding and a rotor winding withldip rings and brushes A three-pole

~ circuit breaker ~ also provided in the termm81 box The nominal ratings of the motor ari~ circuit breaker are listed below r

1 J l-- SPECIFICATIONS MOTORL

WmdingTypeshy Wound Btafor amp Rotor Horsepower shy 13HP Speed shy 175QRPM Voltage bull 20SV bull Sf Amiddot or 860V-s+Y

I Frequency- 60Hz L- Rating Continuous

Full Load Current bull 17 Amps

CIRCUIT BREAKER

Type of Operator bull Rocker Switch L No of PoleS bull Three

Overload )pe bull Thermal Trip Rating shy 2DAmpS Reset Method - middotOW- to Reset

r I - shy OPERATION To operatethe ~-l00-SAas an induction motor make the connections shown

in Figure L Rotate the Wound Rotor Speed Control ~b to the maximum resisshytance fttn~ counterclockwise direction With all th~ ~ce in the rotor cir middotcai~ the motor-willdevelop maxirilum starting torque and minimum ~g curshy

rent Pwih up the rocker switch on the circuit breaker~ startmiddottqemotorbull The motor will accelerateup to speed The rheostat providesthe mSansofv~g theL motors lQieedtorque characteristicS The effect of the rlieostat increUes with increasing load onthe motorr ~

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WRM-10o-3A

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A 6 C AC INPUT SI1PPLY

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WRSe-100

FIGURE 1

ENGfNEERING CORPORATION ------- MANUFACTURERS 01= EQUIPMENT lOR EDUCATION AND INDUSTlY

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GENERAL

SPECIFICATIONS

middotMODEL SMmiddot100middot3ASYNCHRONOUS MACHINE

ThemiddotSMmiddotI00-8A is a three-phase four-pole machine consisting of a wyedel~ stashytor andmiddot 8 quadrature rotor having a DC field winding and a damper winding A three-pole circUit breaker and a IND START-BYNC RUN switch are provided in the terminal OOx- RatingS fonow

SM-100-3A MOTOR ampALTERNATOR

Speed - 1800 RPM Voltagemiddot Max Ambient Temp Insulation bull Rating bull

CIRCUIT BREAKER

Type of~tor shyNo ofPoles bull Overload Type bull Trip Rating bull Reset Methoa shy

ALTERNATOR

Power-Load Current bull Fielti Excitation shy

MOTOR

HorSepowershyCurrent bull Frequencyshy

208120V-B+-4W 4~ (1047) ClassmiddotB Continuous

Rocker Three Thermal L7amps

middot middotOFF to Reset

250 watts 07 amp (nominal) Separate L6 amps

18 HP 17 Amps 60Hz

ENGINEERING COAPORATION --~-MANUf~RpoundRS~ EQUIPMENT lOR EDUCATION ANO INDUSTRY

Po Box 563 East Lon~~dow~ O~028 (413) 525-3981 bull 1tX95-S426 bull Pax (413) 525-4741

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OPERATION Th~ proper connections tor operation of th~ SMl00-SA ~ a ~clttonous (SYNCHRONOUS motor are shown in Figure middot1 With ~ ~tebin the SYNC RUNposiliou MOTOR) ~ze the vari~ble DC supply and adjusttbe~tput voltage from zero up to

th~ value which eauses 1 amp to flow through the rotor ~turn the switch to the lNDSTART PO$ition middotand Start the motor by toggling~becircuit breaker to

the ONposltion WJten the motor reaches DO lQad 1ij)eeC1 move the switch to the SYNC RUN posItion The rotor will then sYnchronize with the nn~ and fJ1e motor wiD be ti1mrlng at exactly 1800 RPvL Used to demonstrate the Wrious ~tics of synclirOnous motors

+VARIABlpound DC

_sUPPLY

STATOR ROTOR middotL1middot 11 A~~-eJ-----CJ

middot AC u l 12

~~YB~T middotJ3~T3

ct-O--ltr

VARIABLE + DC SUPPLY

FIGURE 1 SM-10o-3A AS A SYNCHRONOUS MoioR

ABC AC SUPPLY INPUT

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OPERATION The proper ampinn~~ fo~ operation or the SM-l00-SA as an alternator are ALTERNATOR) shown in Fi8Ure ~ With tliese connections made and the switch in the SYNCL RUNposition drive the alternator at 1800 RPM With a sUitable prime mover

Energize the DC Voltage supply and increase thesupplys output to bicrease f themiddotslternatorts output voltage to the desired value Toggle the circuit breaker ~L ~ tlie ON pPSition to connect the alternators output to the load Used to

middotdemonstrate the characteristics of a polyphase alternator of the stationary arshyr mature typebull ~t may also be used asthe loading device when testing the varishyI oUsmotom- shy

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OUTPUT

rmiddot~ FIGURE 2 L SM-10o-3A AS AN ALTERNATOR

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[ MANUF~OF EOUIPMENT fOR E0UCA1lOH AND INOUS1RY

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SERJES100 OPERATING INStRUCTIONS

oMOoDEL DMmiddot1 DDA DC MACHINE

GENERAL The DY-10OA is amiddot two-pole compound-wound machine ~g of a shunt field a series field and an armature winding A shunt fie1dmiddotr~t and two-pole startel switM are also provided in the-terminal box ~tings follow

SPECIFICAnONS

MACHINE

Shunt Field Ex SepO5A 125V Insulation CJass F middotMax Ambient Temp 40 ~C (104 OF) Rating Continl101iS Speed 1800 RPM nominal Shunt Series Compound wo~dJl1Otcr

125V SOAt 18 HP Shunt Series Compound wound generator

RHEOSTAT

Resistance Power Current middot Taper Fuse Minimum Resistance Position

STARTER

Type of Operator No of Poles Overload Type Trip Rating middot Reset Method

125V 2A 250KW

800~Ohms

100 Watts O575middotAmps Lin ear 1A SJo Blo

Toggle Two Thermal 4lAmps Push Toggle down

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L FUNCTION The primDrJ function or the DC motor is to demonstrate the characteristics of

shunt series ancl compOund motors~ It IIl8Y also bemiddotutiHzed as a prime mover when testiJlg a gel1eraloror alternator Using the DCmiddotmotor tor this PurPose has the advantage th~tbe speed may be held constant bymiddot8djusting tJie shunt field rheostat after each load step is applied

L OPERATION The -proper connections for operation as a ClUDulative compound DC motor are

(DC MOTOR) shOWDin Fipre i Withmiddot theseoonndionS made the motor may be started by moving the starter switch toggle up to the ON position It is good praetioe to stad the motor with the shunt field rh~ in its minimum resistance fully COW position to provide m8amum starting torque andmiDitnum starting Curshy

L rent The motor may then be adjusted ~ the desired speed byadjUBtingtbe field rheostat or varying the line voltage

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1 125VDO SUPPLY

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FUNCTION The DC generator is p~arily utili2ed to demonstrate the characteristics of shunt series ~dCOinpound gen~tors It is~ alsOusedastlle loading device

when testing the vari~us motors

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OPERATION The~CODnections tor operation as a cmnulative C()~po1l1ld nCgenshyeratorareshown in Figure 2 With these connectio~middotmiddotDltldeJ drive theJDCmiddotGENERATOR gen~-atapproxhnately1800RPM with a suitable p~e moVer With thefie1qrheostatJnits Jll8Ximum resistance fullyc1ocm~ position enshyergiZe thel15V DC field supply Rotate the field rheostatinthecltunter

shy clockwisedir$ctian middottoinCreasemiddot the output voltage middotto the desiredmiddot value Switch Oti~middotthemiddotoverloadmiddot switChmiddotto connect the generators output to the

resistance load

+ 1151 DC - 230 W

OUTPUT

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MODEL MGmiddotBmiddot100DG BEDPLATE f

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The MG Bedplateconsists of a heayy s~ baBe n10~~middotmiddoton vibration pads The

I - GENERAL

function otthe bedplate is toe~le the quickmounting ~dcoup1mg of the two individ~ macbiDoes to form a completemiddotmiddotm~ior-Pnerator setpwothreaded hpldshy

~ down)1Ocks ~d winged screwsareprovidecltoseeurethe F t claJnps which hold tbeinBcbinetsmounting boards A couplingguard and two shaft ~gwrrds are p~

r vided to p~ttheSiudenttrom accidet1talJito~gor~~gwires0l1 rotatshy- shy ing)arts The guardsmiddotare quickly mounted bY insertirig retamer CUpS in~T~9tsin

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The procedure for mou~ting and ioupling the machines to the base is as fon~

L 1 A~just each wing screw 021- ~e two screw clamp hold~ownmiddot ~locks to the top of its threaded stud - 0

i 2 Place each ~chine so that the rear of the base is reSting agairistmiddotthemiddot thd rear clamp on thei L- MGbasemiddot

8 Slide machines iJiboara until ~elrcouplingl1anPs are centered oVer cen~ slots 4 bert rub coupnngmiddotsleevemiddot~toone of the mac1dnes co~pling 1IimgM~ L

5 Slidere~jning machines coupling flange into-the other side of couplbig sleeve 6 Checktobe Sure thatmiddot~e couplhig guard will cOver coupling when insertedmiddotinto one ot thel pails areenter slotsmiddot 7 plaCe front clamp tor each of machines against the front or the two macbiD5t bases

(- s 8 F~pr tighten ~~uts 9it middotthe two screw clamp hold-down biocks Lmiddot 9 Mount coUplini aDd shaft guards by locating appropriate retainer clips in slotS so that coushy

pling is ~der co~Ung guard and ~ sh~ is covered by a ~haft guatdL

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SERIES 100 -OPERATINGINSTRUCTIONS

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MODIL1-10oaA TRANSFClRfJIER OEMONSTRATOR

GENEijAL The TlOO-8A~~ts of three Single-phase bansformers wit~ m11Jtiple primary and secondary taps terminated atpinreceptacl~on the front of the unit Each of the three ~rOrinersmay beused independen1q Or the threemay~interconmiddot

f nected mseries~1npQmneJ or inmiddot many poJyph8seCbnfigurations

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EacbtraDslormer is~~middot af)vol~amperesat 60 Hertz ~ has two primary~d

two secoDdaqwindiIlBL Each ofthe priD1817 windiD~1tas800 turns of Nobull 24 gauge-wire and JSmiddotm~-120volta 05 amperes Onewhidingis tapped at 82 volts toprovide~~middotS~tttllp~(866$)middot~fthemiddot twomiddotwiDd1np~ 68ri~ Each or thesecondshylQ7middotwindh1pmiddot1uIs100t11rns of No 21 gauge wire and israted 60 volts 10 ampere One winding Js tappbd atmiddotlaquo volts to p~vide a Scott tapor the two windings in series Shownbelow are the voltage ratings orthe various taps for each of the three traDspoundormers

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t o 32V 120V 0 120V lI__

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middotSEmiddotRIES 100OPERATING INSTRUCTIONS

t bull MODEL middotRLmiddot100AmiddotRESISTANC~LOAD J J- shy~ GENERAL The RL-IOOAfs variable ftsistance unit used to applya resistivel0a4middottogenera

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tors or altemators One unit may be used in single-phase applications ora bank L of tlmae units may be combhled intQ Wye or De1taCOnt1IJDlt1~DS tor three phase

applicmioDS TiieRL-lOOA mttoduces resistieload~ ~sequentild steps r designed to prod11CB approximateiy equal ipcremeJlts otJoadmiddot~tmiddot The SPST f ~ toigle switches are numbered andmiddot must be cloSed in nUD1erl~ordertodecrease

totlreslstance~creasmglOad The total ~cemiddot or the cOb~ected~rs ( may be COmputed f~theequation L

middot 1 1 1-1 ~=R1+Ri+lt8middotmiddotmiddot

The ConowingO equations may be used to detemUne the power disSipated from a measurement of load currentor voltage

L P=EI = = I~

p (ampp) = 8 xEpBPH (tor balanced ioad)

Where P=P~inWatb

E =yoltage inVolfB I = Currentin Amperes

f R =Resistance in Ohms L P(Stp) =middotmiddotTotalPower for Three-Phase

~H ==~ Voltage per Phase~r Load Bankf L bull IpH = Ourrent per Phase ofLoad Bank ampshy

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FROM AC OR DC SOURCE

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~ SERIES 100 OPmiddotERATmiddotING INSTRUCTIONS

MODEL RLC-100RESmiddotISTANCE-REACTANmiddotCE LOAD

The RLCl00 ismiddota variable resistance and--reactance- (either ~ductive or capaci- tive) uDit that ~y be used _to apply a singl~plmse or a three-phase load The remstive load (w~ can be ~ for both middotACcd DC) is controDed by siz SPST toggle switches e8ch of which puts 2000 ohlnaof resistance in paraDelmiddot lor all three phases simultaneouslybullThe resistive-load is therefore always balanced The total resistance in eacli ph8se equals 2000- ohms divided by the Dumber of switches closed For example with two sWitehesclosedtbe total resistance-is 1000 ohms rith aUsiZ closed 8888 ohms Each or the three reactance loads (used forAC o~) separateVfused at 1 amp is controlled by a knob that varltlSthe degreeopound lead andmiddot l8g A clockwise rotationof the middotknob applies leadiIlg pOwer factor (cashypaCitive)loid while a counterc1~ rotation appIiesa lagging power factor (inductive) load There is DO lpadapplied whenthe-knob is in mid position

The 8-4-5 right triangle graph below may bemiddot~ to approximate a O~8 power factor leading or lagging

1 Appfi a resistiVe load 2 Readthe in-phase current h from -the ammeter 8 From the lR value on tlie horizontal base of the graph travel vertically to the

point where it intersects the 08 PF (total amps) line 4 Frommiddotthis point travel horizontally to the reactive current wlueIz 5 Adjust the ~ve load until the Ix ammeter reads this value of reactive cur

rent

6 To obtain a ~ced load in a three-phaseconfigaratioD repeat Step -5 for the other two~

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-17 35 Henry

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middotINDUCTANCEDIAL POSITIONmiddot (~middotQLJNT~RCmiddotLOCKWJSE)

-12 51 Henry

middot11 ~ 57 Henry

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-5 143H~nrYmiddot

-15 ~41middotmiddotHQIllY

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-7 97 HefJry

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DIAL POSITION CAPACITANCE (CLOCKWISE)

0 69 llF

1 1~57 J1F

2 316 J1F

3 501Jlf

middot4 640J1F

5 80~J1f

6 985 j1f 7 1160middotpF

8 1360J1Fmiddot

9 1609middotJ1F

10 18~JtF

11 2007~middotF

12 2170 fLF

13 2513 )iFmiddot

14 2860J1F

15 3090 pFmiddot

15 3269JlF

17 3539 JlFmiddot (

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SERIES 100OPERATING INSTAUCTIONS L

- -

-

MODJL ACVA-10()ACMETERINGPANEL L GENERAL The HAMPDEN Model ACVA-1OO consistsmiddotol two AC ammetem and one AC voltshy

meterA11 or the meters are dioaeprot8cted against overloads as high 1Ui 1000f

The ~ltmeter islicctt8 within 8 w1UIemiddotthe ammeters are accurate wi~hin ~ plusmn29D ormiddotfWl sCale dellection The middotme~rshave the following ranges

r I AC Voltm~teI Oto l00~OO V~ts ~ AC Amme~ OtlJQ5f2f4l8-Amps

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OPERATION

AC AMMETERS

L 1 Connect the ammeter in series so that the middotentire AC current to be measured passes

I through the ~~ter The test lead from the dark blue middotbindingpostis connected to one

side or the Dne and the test lead trom the Qrange bin~ post to the other ~ L

2 ~e choice or measuring range is iet with the range switch Fourmiddotranges are avaiiable O 05 0204 an~ 0 - 8 amperes

8 Set the rangemiddotswitch on the 8 ampere range Detore turning on the power

a) When ~ to measure motor current put a jumper lead between the tWo binding poststo protect the movement from the large inrushcurrent at start This jumper is

(

removed after the motor has started

--~---~--~_--------~---_~_----ENGINEERfNG CORPORATION

MANUFACTURERSmiddotOF rpUIPMCNT F()R EDUCATION AND INDUSTRY

L POmiddotBoxS63 East Longmeadow MA 01028middot (413) 525-3981 bull TLX 9gt5426 bull Pax (413) S2S-474i

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MODELACWM-1 GO WATIMETER PANEL

GENERAL The1iAMPDEN Model ACWMmiddotI00 consists artwo Iilulti-rangewattmeters and

I tbe~tchesh-lh~r operation Eacli has ~e follOwing ranges l

)to 1~30016~1200W

(150300Volts 2148 Amps)

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OPERATION Measure wattage bymiddotconn8cling a wattmetervoltmeter andmiddot~ete~8sshownin Figtt81 The ~-MPstttOn mustO be~middotconn~middotin series- with the ioad and-the

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VQTS con mUstmiddotbeqo~n~middotiJ1 prU9l1elwith the load protected against overloads by diodes

The Otlrrent~Coils are

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-FIGURE 1 WATTMETER CONNECnONS 14IJ -- -

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Each wa~eter has tWomiddot Voltage mtinp (150 and- 800V)~ Rotating the range -switclirounterciOCkwise from OFF engages the 150 volt range Rotatmg the _range SWitch clOQkwise from O~ engages the 800 volt range Utilize the Voltmeters readiDg to determine the approprlllte-range

Each wattmetermiddot has three currentmiddot ratings (2 4 and SA) Rotating the range swiJchfrom middotO~engages the Samprarigefbst ~ the wattm~termiddotreadsbelow ~r 8Cll18 and the ammeter indicates that the 4 amp rating will not be ~e9 ~ectmiddotthe 4 ainp range-middot If the mttnie~ again reads below balt scaie and the ammeterindicates that the 2 amp rating will no~ bemiddot exceeded the 2 amp range may bese1ectedI

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L FIGURE 2 WATTMETER CONNECTIONS 3fi1

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L middot The totalwatbge is the sum of the two meter readings PI and P2

f When pow~ in a ~ced load is m~ured in this ~er the indication or the 1

two ~eterS VlLL~PT be the same except at 1D1ity power factor middot -shy

When the power factor of the circuit is less than 509b the pointer of meter PI will reverse~ To obtain total wattage in this case reverse the current connections to metet Pl -then subtract the rea~g ormeter PI from that of meter P2

The twO-wattmeter~method cannot be used with as-phase 4-wire load Three wattmeters are ~ in that case

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POWER FACTOR i f ~

Given a balallCed load the~oWer tacentor middoteanbe -d~emiined from the two wattmeter mth6cL - ~

L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

J be calca1ated -from-the -following_equation0

J ~

tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

wherep2 repr~ts th~~ier~thetwoWl1ttiJ1~ re~ingswhentbepower faeto~l~other thaD uPity

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BiDet th~powertaetb~ 8q1alsthcosme ofthephaseangletP~powerfactor may also be I deterJninedfromtheratioo~thetwo wittmeterreadings middotmiddotThegraph b~ow shows the1 I

I relationship between themiddotpowerfacior andth~ratio~f P1lP2 ~

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MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

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L OPERATIONI

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DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

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agt If the currePtis~ter than 5 amperes the needlewDI move off-scale TuRN OFF POVER IMliEDIATELY AJf exception to this may be on motor starling Momenshytary current inrushbullmay exceed 5 ampe~ but theneedleiminediately drops back to normal

b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

L

1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

L

a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

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MODEL-1723 rACHoME~R

DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

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MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

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consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

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f bull -Vari8bleO ~ 150vnQ-i~(lA isolated l~RMS L bull Variable 0 ~ 125VDCt 5Q -isolated ItlmiddotRMS middot

OPEBATIONTouSe the powermiddotpanelt (lISt tum ON ~MAIN AC circuit breaker~i This will m~tethemain AC pnot Hght and 9nergize the four-pin ~Pyen~i supplying fix~208120VAOtliree-phase poWer Th~ other 1ixed~d~Je sulpHes may

l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

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Page 5: [1 Table D. - UTKweb.eecs.utk.edu/~jsl/ECE325/ECE325-LabManual.pdfLab #2 Load-Speed Characteristic of a DC Motor . Objective . The objective of . this . lab is to . detennine the load-speed

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Lab 1 Voltage Regulation of a Single Phase Transformer

Objective

The objectiveof this lab is tocorrelate the calculatedvolmgeregulation ofa single phase

transformer with the regulation obServed in the laboratoryt and also to make general observations about transformers L

( 1 Pre-LabJ shy

The laboratory transfonncr is to be used as a 220110 volt transformer (see Figure 1) The series

impedance referred to the 220 volt si4e is approximately (24+j12)0lr

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Figure 1

1 State the voltage and current relaqonships of an ideal transformer t bull 2 List some reasons why real world transformers are not ideal-l

3 Define voltage regulation 4 Assuming a purely resistive lo~d calculate and plot the relationship between secondary

tenninal voltage (V2) and secondary currentmiddot(12) for a 220 voltprimary voltage (VI) and a

maximum secondary current (I2) of2 amps

5 Draw a circuit diagram showing how the relationship between secondary voltage and current can be measured in the laboratory Indicate sources variable loa~ voltmeters and ammeters

Lab Exercise

1 Connect the circuitfrom the Part ~ wiring diagram 2 Record enough readings ofV2 and 12 to compare with calculated values

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Calcul~tions and Comparisions

L 1 Compare the experimental andcal~ulated results 2 eaicul~ thevoltage~gUlatiQn 3 Why was the eXcitatiOn~chnoiincluded in the calculations Did neglecting this excitation

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Lab 1 Wiring Diagram f L-

POVVER PANEL

0 0 0 0 0 12OVACtaoYAC 002401t~ AC4O-o4W ~AC At AI PAl bull oSOVDC bull sec PRJ bull UVDC bull sec

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l L Lab 2 Load-Speed Characteristic of a DC Motor

Objective

The objective of this lab is to detennine the load-speed characteristics ofa DC motor

rmiddot Part AL

1 The DC machine will be ron as a genetator at a constant speed- The armatureresistance (Ra) will 1 I bull -- becalculate4 to assist in plotting tbeSieed VSla annature current

l t Pre-Lab middotL

smiddot 1

I Calculate a synchronous motors rotor speed (f=60 HzN=120fp) for a machirie with four poles and fora machine with six poles

2 Calculate the value afbaclc emf ltEa) fora DC motor (Ka~ = 6944e-2 VRPM) with arotor

speedof 1800RPM with a rotor speed of 1000 ~ and with a rotor speed of0 RPM 3 Draw a circuit dia~ ofaDC machine connected as a separately excited generator (show

~ -resistance indilctance and voltage the field inductance and resistance~d the variableresistive load) Show how to conneCt a voltmeter to measure armature voltage and bow to connectmiddota ammeter tome8sure annafure current

Laboratory Exercise

L Laboiatmy Setup

1 ConneCt the DC machine as a se~tely excited generator and connect the synchronous mac1rlneas a motor as shown in Lab 2 Part A Wning Diagram

2 Mechnica11y couple the two machineS so that the synchronous motor drives the DC generator 3 Set the synchronous-machine to IND STARTt

bull

4 TurD on the main AC power S Tmn the syncllronoDs machine field voltage (0-150 VDC) to position 3 6 Set the synchronousmachine to $YNCH RUN 7 Make sure the rotor speed is 1800RPM

Laboratoty Measurements

( 1 Measure open circuit armature voltage (back emf) and field cmrent as the DC machina field

1 voltage (D-l25VDc) is increased Use field current (If) increments of about 005 A and vary shy

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If up to 05A 2 Set tbeDCmachin~s fieldvoltage to a value ~atbrings the open circuit annature voltage to

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12SVL 3 Measure the anna~ current (Ialand ~ature vol~ge(Vagt as theresistive load is increased I bull

i Do not exceed an annatme current of2At Record eoughpofuts to ~phtheVa VS In L charaCteristicbull

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1 Plot back emf versus fie1ilCUlTent L

2 Plot ~~ture tenninalvoltagc versus armature current

3 Calculai~ta va1~eforannatureresistance (Ra) from the slope ofVa vsIamiddot - ---~~ ~l 4 ~atPtPose does the synchronous machine serve fot Part A~

Part B

The DC ma9bine will be ron as a DC shunt moftr~ The sPee4vs armaturecurrentchara~tic

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will be mcas1Jtcd andplotted and the effectof anna~ reacnon will be evaluated

Pre~Lab

L 1 DraJithecircuitdiagram ofa DCmiddotshunt motor

1 1 2 Defihe annatitte reaction shy

3 CalcnlateKa~forVt=Ea=125V at 1800 RPMmiddot

4~ Develop a re1ationshipmiddotof speed as a funeti()11 ofannl-~ ~nt Use the values of Vt andL KaW from above and assume that annature reaction is negligible I L

Laboratory Exercise

2 I -- LabomtotySetup t

I i 1 Set the ()lS0 VDCknob to position 3

2 Set the synchronous machine to SYNCH RUNt l

3 Co~ecttbeDCma~hine asa shunt motor and the middotsynchronousmiddotm~hineas a 3-phase ACL

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generator as shownin Lab 2 PartBWiring DIagram 4 Connect the variable three~phase resistive load to the oU1put tenninals of the synchronous)

L machine The resistance of the load will be increased to place a mechanical load on the DC motor (drawing more current through the DC motors armature)

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Laboratory Measurements

1~ U~ouple the two machines 2 Turn on main power 3 Set the PC armature voltage (by using the ~12S VDCknob) to 12SV 4 Adjust~eDC machine field rheostat to obtain a no-load speed of 1800 RPM

s Measure annature voltage and ~ature current at no-load

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6 TUrn theO-l2S VDe knob down to stop the motor (leave the field rheostat as it was set) 7bull Couple the motor andthe gener8m 8 Tmn th~ 0-125 VDe knob up to increas~ armature voltageto 12SyenL 9 Incre~~ the load onthe synchronous gCIieratorbull For each 3-phase load switch record the

annature current and the speedJ L

Calculations 1

L 1 Calculate the power consumed by the DC machine at noload(no-16ad losses)

I 2 Plot speed versus ~ature cocrent (a) from claculatedvalnesusing Rafrom Part A andIa = 0 L- tolS A (b) using experimentaldatagathered in Part B CoIPpare the two plots

3 H themiddotvaIueof Kaclgt decreas~s withhigb~annature current how is the speed effected~

4 How could one explain the ttiffercncesbetween dle experimental and theoretical plots Shouldannature reaction be neglected Use figures andor m~strations to support your answer

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Lab 2P~~t A Wiring Diagram

PQVIER PANa

0 Omiddot 0 0 0 12fNNJ t2OVAC MAlHAC PAt bull ot5OVDC bull SEC PAl bull o12SVDO bull SEC 12OVAC~~W

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Lab 2 Part B Wiring Diagram

POWER PANEL I bull

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calculate the parameters ofan inductionmotorequivalent circUi~ and to compare the calculated values with measured values L

Pre-La))

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1 What are the two typeS ofrotOis used mAC inductlonmotorsl t 2 Give theequation for SYDchrono~ speed What is the synhronous speed for a four pole AC ~

L ~d-qctiltgtn~bine (standacent ~efrecFJe~) 3 Define slip for an induction motor If thesynchronous speed is 1800 RPM and the slip (s) is

L 001 what is the rotor speed Ifs == 011 -

l bull 4 Draw a power flow diagram for an AC induction ~otor

5~ middotmiddotDrawatorque VS~ sp~d curve for ail ACinduction motor What is the torqu~ prodnced at synchronous speed (Ns)

6 DescnDemiddot~ no-load test and the blocked rotor ~t for an induction motor Whatis the value ofslip for a Blocked ~otor Test

7 Draw the lEEE-recommended equivalent circuit~ shyL

Calculations C l

l Given the follow~g test results

fLj No-load test Line voltage= 210 V

Linecuxrent iO77 A

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Iiiputpower = 52 W L

I - Blocked-rotor test Line voltage ~ 60V shy tinecu1rent 17 AJ - shy

Input power == 100 W

Also given stator r~tance (Rl) =53 Wphase DL synchronous speed (COsyn) =1885 radlsec

L (R~ember that you are worldngwith a 3-phase machine)

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1 Calculate the parameters of the lEEE-~~ended equivalent circuit 2 Calculate the induction motornopad rotational Io~ 3 CalculateI2t I1t PF Fin Ptiutt Eff and ToutfQrslip v~ues fa11ging from 0 to O~l (with

L step siZe 001) (Pont =Pmech - Prot and Tout = Tmechgt

3 ~lot outputtorque versus speed ~ 4 Plot power factof versusoutput powe~ 5 piot AC)ine current versus outpu~power

i 6 it Plot efficiency versus outPut pow~ shy

LabormiddotatorY Exercise LabgratolY Setup

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L 1 S~tUP middottheOC machine as a sep~te1y excited generator with variableresistance load bank andthe wo~drotot motor as an indu~on motor to drivemiddotthe DC generator (Connect the

indu~Otimotorstatotwindirigsfu a delta confi8uration) This is shown in the Lab 3 Wiring Diagrallt ~

3 CQ~tXtawattmetet to measure power into the itlductionmotor 4 CoDnectDC meters tomeasure DC generator ~nniDalvoltage and armature current 5 Connect AC ~terStOmeasweline to neutral voltage and line current

j 1

- Laboratoxy Me~ments

J 1 Mechanically conple the induction motor to the DC generator-

2 Bring the 3-phase AC voltage to 120V (line to n~tral) ~ I

i 3 Whenmiddotthe induction mot-or is running (around 1783 RPM) bring the nmiddotc machine terminal ~ ~ ~oi~ uP to 125 V middot

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6 First take a set ofmeasurements with all the resistance switches off 1 middotTheD continuerecordingmiddotas theJoad is increased up to ACmiddotllne current of 15 A Do not

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CalctilationS

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~ 1 Calculate values for Pin Pout PF Eff~ atidTout

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f 2 Plot ()utput torgue versus speed ( L- 3 Plotp01l-er fa~torve~u~middot outp~tpoer

4 Plot AC line current v~~outputpower f 5~i Plot~fficl~ncy verSusoutputPQwer L 6 Con1p~ethe ~resu1ts wi~thecalcu1ated results 7 CommeIJton the wisdom ofbuying an indu~on motor having a signijican~ygreaterporse i L power ra~g than iSrequiiedmiddot to dothejob~

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Lab 3 Wiring Diagram

PONERPANa

0 0 0 0 0 120VAC ~laquoNAD4O-4W 12OVoAC MAINC PAl bull o-1atNDC - SEC PAL bull 00121VDC bull SEC 12OVAC

0 ~ 0 0 GJ EJ []] 0 GJ ~ 0 ~ 0

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La) 4 Synchronous Motor

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L Objective

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L The objective of ~ lab is tomiddotexamine the terminal characteristics ofa synchronous motor under - I08(fand no-load conditions

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Pre-Lab

i - L 1 Whatisan important feature ofsynchronous motors

~ Dra~ariequivalentcircuit modetfor a synclnypousmotor ShowEf Xs Ra Iat~Vt If and

the fiel~winding 3 Descripe the open-eircuit test ~t is measured What is varied Sketch the circuit 4 Descn1le the short-circuit test Mat is measured What is varied Sketch the circuit 5 Sketehatt open~ircuit ch8rac~riStic aDd a short-circuit charac~eriStic Show Ia (rated) Vt

(rated) a11da modified airgaplineL

Laboratory Exercise f Part A L

The open-circuit and short-circuit tests will be performed to determine values f~r Xs and ~using

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the synchronous machine as a generator

Procedure

1 ~ Connect the DC machine as a selfexcited shunt generator 88 shown in Lab 4 Part A ~g

diagram

2 ~ Couple the DC machine to the syn6~nous machine f 3 Set the 0-125 VDCbob to zeromiddot L

4 Set the 0-150 VDC kn~b to zero 5 Set the synchron~us mac~e to INn START e

6 Bring the DC~cbine terminal voltage up to 125 Vt and adjust the field rheostat to obtain a speed of 1800~M

7 Set the sYnchronous machine to SYNCH RUN 8 Perform the open-circuit test With the synchronous machines terminals open measure the

( voltage across the windings (V00) as field current (If) in increased Increase the field current t - by increasing the DC voltage across the field winding Vary If from 0 to lA in increments of

l 9 OlA Set If to zero

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10 Perform the short-circuit test Short the ph~ windings of the synchronous machine and put

i i an ammeter in series with the shorted windings Measuremiddotthe average windingcurrent (Isc) as L

If in increased V~If from 0 to lA in increments ofOlA ( t

i L- Calculations

1 4~middotVt = Voc =120middotVcaJ~ulatcentmiddotXs and K(Xs =Voc IIsc andK= Voc I If)

2 P16tIIalvs If~(IIal =1Vt--KIf) I Xsi ) t L Part Bmiddot L The annatuIecurrentwill be measured agfield current is varied under loadmiddot and no loadconc1itions

L-

-

1 Connectfh~sySte~ as sbownin the Lab 4 Part Bwiring diagram but do not couple the syn~~riq~-~tiinetothe DC machine~

2 Senhe~chronousmac~to lND STARr 3 Thin tbe6-1S0vnpknobto position cO5~

4 TumODmailtpoiVer

( S S~ the synclnpnbusmachine tq ~YNCH RUN The motor speed should be 1800 RPM L 6 MeasureIa andItas If is varief1 up to lA

Load Procedure shy

1 TUm offmain power 2 Mechanically couplethe synchronous machine to the DC ~hine

3 Set~~ first nine switches of the resistance load to ON ) 4 Setthe-~chrononsmachine to lND START L

5 Turno~middot-m~~wer

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1~ 6 Tuni the~o-lS0VDCknob to position 20bull

~ 7 Settheo-l25VDCknobtoposition pound9 tbull

8 Set the synchronous machine to SYNCH RUN The motor speed should be at 1800 RPM 9bull Measure Ia and Ifas Ifis varied up to lA

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Calculations L

1 Plot Ia V8 If for load and no load conditions and compare with c~cu1ated graph

2 Is there a best~fieldcurrent at which the synchronous machine should be operated

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Lab 4 ~art A Wiring Diagram

POWER PANEL

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MODEL WRM-100-3A WOUND-ROTOR MOTOR

GENERAL The WRY-100-SA is a three-phase four pole wound-rotor motorconsisting of a stator winding and a rotor winding withldip rings and brushes A three-pole

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1 J l-- SPECIFICATIONS MOTORL

WmdingTypeshy Wound Btafor amp Rotor Horsepower shy 13HP Speed shy 175QRPM Voltage bull 20SV bull Sf Amiddot or 860V-s+Y

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CIRCUIT BREAKER

Type of Operator bull Rocker Switch L No of PoleS bull Three

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GENERAL

SPECIFICATIONS

middotMODEL SMmiddot100middot3ASYNCHRONOUS MACHINE

ThemiddotSMmiddotI00-8A is a three-phase four-pole machine consisting of a wyedel~ stashytor andmiddot 8 quadrature rotor having a DC field winding and a damper winding A three-pole circUit breaker and a IND START-BYNC RUN switch are provided in the terminal OOx- RatingS fonow

SM-100-3A MOTOR ampALTERNATOR

Speed - 1800 RPM Voltagemiddot Max Ambient Temp Insulation bull Rating bull

CIRCUIT BREAKER

Type of~tor shyNo ofPoles bull Overload Type bull Trip Rating bull Reset Methoa shy

ALTERNATOR

Power-Load Current bull Fielti Excitation shy

MOTOR

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Rocker Three Thermal L7amps

middot middotOFF to Reset

250 watts 07 amp (nominal) Separate L6 amps

18 HP 17 Amps 60Hz

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OPERATION Th~ proper connections tor operation of th~ SMl00-SA ~ a ~clttonous (SYNCHRONOUS motor are shown in Figure middot1 With ~ ~tebin the SYNC RUNposiliou MOTOR) ~ze the vari~ble DC supply and adjusttbe~tput voltage from zero up to

th~ value which eauses 1 amp to flow through the rotor ~turn the switch to the lNDSTART PO$ition middotand Start the motor by toggling~becircuit breaker to

the ONposltion WJten the motor reaches DO lQad 1ij)eeC1 move the switch to the SYNC RUN posItion The rotor will then sYnchronize with the nn~ and fJ1e motor wiD be ti1mrlng at exactly 1800 RPvL Used to demonstrate the Wrious ~tics of synclirOnous motors

+VARIABlpound DC

_sUPPLY

STATOR ROTOR middotL1middot 11 A~~-eJ-----CJ

middot AC u l 12

~~YB~T middotJ3~T3

ct-O--ltr

VARIABLE + DC SUPPLY

FIGURE 1 SM-10o-3A AS A SYNCHRONOUS MoioR

ABC AC SUPPLY INPUT

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OPERATION The proper ampinn~~ fo~ operation or the SM-l00-SA as an alternator are ALTERNATOR) shown in Fi8Ure ~ With tliese connections made and the switch in the SYNCL RUNposition drive the alternator at 1800 RPM With a sUitable prime mover

Energize the DC Voltage supply and increase thesupplys output to bicrease f themiddotslternatorts output voltage to the desired value Toggle the circuit breaker ~L ~ tlie ON pPSition to connect the alternators output to the load Used to

middotdemonstrate the characteristics of a polyphase alternator of the stationary arshyr mature typebull ~t may also be used asthe loading device when testing the varishyI oUsmotom- shy

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OUTPUT

rmiddot~ FIGURE 2 L SM-10o-3A AS AN ALTERNATOR

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SERJES100 OPERATING INStRUCTIONS

oMOoDEL DMmiddot1 DDA DC MACHINE

GENERAL The DY-10OA is amiddot two-pole compound-wound machine ~g of a shunt field a series field and an armature winding A shunt fie1dmiddotr~t and two-pole startel switM are also provided in the-terminal box ~tings follow

SPECIFICAnONS

MACHINE

Shunt Field Ex SepO5A 125V Insulation CJass F middotMax Ambient Temp 40 ~C (104 OF) Rating Continl101iS Speed 1800 RPM nominal Shunt Series Compound wo~dJl1Otcr

125V SOAt 18 HP Shunt Series Compound wound generator

RHEOSTAT

Resistance Power Current middot Taper Fuse Minimum Resistance Position

STARTER

Type of Operator No of Poles Overload Type Trip Rating middot Reset Method

125V 2A 250KW

800~Ohms

100 Watts O575middotAmps Lin ear 1A SJo Blo

Toggle Two Thermal 4lAmps Push Toggle down

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L FUNCTION The primDrJ function or the DC motor is to demonstrate the characteristics of

shunt series ancl compOund motors~ It IIl8Y also bemiddotutiHzed as a prime mover when testiJlg a gel1eraloror alternator Using the DCmiddotmotor tor this PurPose has the advantage th~tbe speed may be held constant bymiddot8djusting tJie shunt field rheostat after each load step is applied

L OPERATION The -proper connections for operation as a ClUDulative compound DC motor are

(DC MOTOR) shOWDin Fipre i Withmiddot theseoonndionS made the motor may be started by moving the starter switch toggle up to the ON position It is good praetioe to stad the motor with the shunt field rh~ in its minimum resistance fully COW position to provide m8amum starting torque andmiDitnum starting Curshy

L rent The motor may then be adjusted ~ the desired speed byadjUBtingtbe field rheostat or varying the line voltage

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1 125VDO SUPPLY

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FUNCTION The DC generator is p~arily utili2ed to demonstrate the characteristics of shunt series ~dCOinpound gen~tors It is~ alsOusedastlle loading device

when testing the vari~us motors

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OPERATION The~CODnections tor operation as a cmnulative C()~po1l1ld nCgenshyeratorareshown in Figure 2 With these connectio~middotmiddotDltldeJ drive theJDCmiddotGENERATOR gen~-atapproxhnately1800RPM with a suitable p~e moVer With thefie1qrheostatJnits Jll8Ximum resistance fullyc1ocm~ position enshyergiZe thel15V DC field supply Rotate the field rheostatinthecltunter

shy clockwisedir$ctian middottoinCreasemiddot the output voltage middotto the desiredmiddot value Switch Oti~middotthemiddotoverloadmiddot switChmiddotto connect the generators output to the

resistance load

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OUTPUT

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MODEL MGmiddotBmiddot100DG BEDPLATE f

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The MG Bedplateconsists of a heayy s~ baBe n10~~middotmiddoton vibration pads The

I - GENERAL

function otthe bedplate is toe~le the quickmounting ~dcoup1mg of the two individ~ macbiDoes to form a completemiddotmiddotm~ior-Pnerator setpwothreaded hpldshy

~ down)1Ocks ~d winged screwsareprovidecltoseeurethe F t claJnps which hold tbeinBcbinetsmounting boards A couplingguard and two shaft ~gwrrds are p~

r vided to p~ttheSiudenttrom accidet1talJito~gor~~gwires0l1 rotatshy- shy ing)arts The guardsmiddotare quickly mounted bY insertirig retamer CUpS in~T~9tsin

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The procedure for mou~ting and ioupling the machines to the base is as fon~

L 1 A~just each wing screw 021- ~e two screw clamp hold~ownmiddot ~locks to the top of its threaded stud - 0

i 2 Place each ~chine so that the rear of the base is reSting agairistmiddotthemiddot thd rear clamp on thei L- MGbasemiddot

8 Slide machines iJiboara until ~elrcouplingl1anPs are centered oVer cen~ slots 4 bert rub coupnngmiddotsleevemiddot~toone of the mac1dnes co~pling 1IimgM~ L

5 Slidere~jning machines coupling flange into-the other side of couplbig sleeve 6 Checktobe Sure thatmiddot~e couplhig guard will cOver coupling when insertedmiddotinto one ot thel pails areenter slotsmiddot 7 plaCe front clamp tor each of machines against the front or the two macbiD5t bases

(- s 8 F~pr tighten ~~uts 9it middotthe two screw clamp hold-down biocks Lmiddot 9 Mount coUplini aDd shaft guards by locating appropriate retainer clips in slotS so that coushy

pling is ~der co~Ung guard and ~ sh~ is covered by a ~haft guatdL

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SERIES 100 -OPERATINGINSTRUCTIONS

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MODIL1-10oaA TRANSFClRfJIER OEMONSTRATOR

GENEijAL The TlOO-8A~~ts of three Single-phase bansformers wit~ m11Jtiple primary and secondary taps terminated atpinreceptacl~on the front of the unit Each of the three ~rOrinersmay beused independen1q Or the threemay~interconmiddot

f nected mseries~1npQmneJ or inmiddot many poJyph8seCbnfigurations

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EacbtraDslormer is~~middot af)vol~amperesat 60 Hertz ~ has two primary~d

two secoDdaqwindiIlBL Each ofthe priD1817 windiD~1tas800 turns of Nobull 24 gauge-wire and JSmiddotm~-120volta 05 amperes Onewhidingis tapped at 82 volts toprovide~~middotS~tttllp~(866$)middot~fthemiddot twomiddotwiDd1np~ 68ri~ Each or thesecondshylQ7middotwindh1pmiddot1uIs100t11rns of No 21 gauge wire and israted 60 volts 10 ampere One winding Js tappbd atmiddotlaquo volts to p~vide a Scott tapor the two windings in series Shownbelow are the voltage ratings orthe various taps for each of the three traDspoundormers

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t o 32V 120V 0 120V lI__

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t bull MODEL middotRLmiddot100AmiddotRESISTANC~LOAD J J- shy~ GENERAL The RL-IOOAfs variable ftsistance unit used to applya resistivel0a4middottogenera

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tors or altemators One unit may be used in single-phase applications ora bank L of tlmae units may be combhled intQ Wye or De1taCOnt1IJDlt1~DS tor three phase

applicmioDS TiieRL-lOOA mttoduces resistieload~ ~sequentild steps r designed to prod11CB approximateiy equal ipcremeJlts otJoadmiddot~tmiddot The SPST f ~ toigle switches are numbered andmiddot must be cloSed in nUD1erl~ordertodecrease

totlreslstance~creasmglOad The total ~cemiddot or the cOb~ected~rs ( may be COmputed f~theequation L

middot 1 1 1-1 ~=R1+Ri+lt8middotmiddotmiddot

The ConowingO equations may be used to detemUne the power disSipated from a measurement of load currentor voltage

L P=EI = = I~

p (ampp) = 8 xEpBPH (tor balanced ioad)

Where P=P~inWatb

E =yoltage inVolfB I = Currentin Amperes

f R =Resistance in Ohms L P(Stp) =middotmiddotTotalPower for Three-Phase

~H ==~ Voltage per Phase~r Load Bankf L bull IpH = Ourrent per Phase ofLoad Bank ampshy

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~ SERIES 100 OPmiddotERATmiddotING INSTRUCTIONS

MODEL RLC-100RESmiddotISTANCE-REACTANmiddotCE LOAD

The RLCl00 ismiddota variable resistance and--reactance- (either ~ductive or capaci- tive) uDit that ~y be used _to apply a singl~plmse or a three-phase load The remstive load (w~ can be ~ for both middotACcd DC) is controDed by siz SPST toggle switches e8ch of which puts 2000 ohlnaof resistance in paraDelmiddot lor all three phases simultaneouslybullThe resistive-load is therefore always balanced The total resistance in eacli ph8se equals 2000- ohms divided by the Dumber of switches closed For example with two sWitehesclosedtbe total resistance-is 1000 ohms rith aUsiZ closed 8888 ohms Each or the three reactance loads (used forAC o~) separateVfused at 1 amp is controlled by a knob that varltlSthe degreeopound lead andmiddot l8g A clockwise rotationof the middotknob applies leadiIlg pOwer factor (cashypaCitive)loid while a counterc1~ rotation appIiesa lagging power factor (inductive) load There is DO lpadapplied whenthe-knob is in mid position

The 8-4-5 right triangle graph below may bemiddot~ to approximate a O~8 power factor leading or lagging

1 Appfi a resistiVe load 2 Readthe in-phase current h from -the ammeter 8 From the lR value on tlie horizontal base of the graph travel vertically to the

point where it intersects the 08 PF (total amps) line 4 Frommiddotthis point travel horizontally to the reactive current wlueIz 5 Adjust the ~ve load until the Ix ammeter reads this value of reactive cur

rent

6 To obtain a ~ced load in a three-phaseconfigaratioD repeat Step -5 for the other two~

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RESISTIVE AMPERES

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-17 35 Henry

-13 47 Henry

middotINDUCTANCEDIAL POSITIONmiddot (~middotQLJNT~RCmiddotLOCKWJSE)

-12 51 Henry

middot11 ~ 57 Henry

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-15 ~41middotmiddotHQIllY

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-7 97 HefJry

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DIAL POSITION CAPACITANCE (CLOCKWISE)

0 69 llF

1 1~57 J1F

2 316 J1F

3 501Jlf

middot4 640J1F

5 80~J1f

6 985 j1f 7 1160middotpF

8 1360J1Fmiddot

9 1609middotJ1F

10 18~JtF

11 2007~middotF

12 2170 fLF

13 2513 )iFmiddot

14 2860J1F

15 3090 pFmiddot

15 3269JlF

17 3539 JlFmiddot (

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SERIES 100OPERATING INSTAUCTIONS L

- -

-

MODJL ACVA-10()ACMETERINGPANEL L GENERAL The HAMPDEN Model ACVA-1OO consistsmiddotol two AC ammetem and one AC voltshy

meterA11 or the meters are dioaeprot8cted against overloads as high 1Ui 1000f

The ~ltmeter islicctt8 within 8 w1UIemiddotthe ammeters are accurate wi~hin ~ plusmn29D ormiddotfWl sCale dellection The middotme~rshave the following ranges

r I AC Voltm~teI Oto l00~OO V~ts ~ AC Amme~ OtlJQ5f2f4l8-Amps

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OPERATION

AC AMMETERS

L 1 Connect the ammeter in series so that the middotentire AC current to be measured passes

I through the ~~ter The test lead from the dark blue middotbindingpostis connected to one

side or the Dne and the test lead trom the Qrange bin~ post to the other ~ L

2 ~e choice or measuring range is iet with the range switch Fourmiddotranges are avaiiable O 05 0204 an~ 0 - 8 amperes

8 Set the rangemiddotswitch on the 8 ampere range Detore turning on the power

a) When ~ to measure motor current put a jumper lead between the tWo binding poststo protect the movement from the large inrushcurrent at start This jumper is

(

removed after the motor has started

--~---~--~_--------~---_~_----ENGINEERfNG CORPORATION

MANUFACTURERSmiddotOF rpUIPMCNT F()R EDUCATION AND INDUSTRY

L POmiddotBoxS63 East Longmeadow MA 01028middot (413) 525-3981 bull TLX 9gt5426 bull Pax (413) S2S-474i

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MODELACWM-1 GO WATIMETER PANEL

GENERAL The1iAMPDEN Model ACWMmiddotI00 consists artwo Iilulti-rangewattmeters and

I tbe~tchesh-lh~r operation Eacli has ~e follOwing ranges l

)to 1~30016~1200W

(150300Volts 2148 Amps)

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OPERATION Measure wattage bymiddotconn8cling a wattmetervoltmeter andmiddot~ete~8sshownin Figtt81 The ~-MPstttOn mustO be~middotconn~middotin series- with the ioad and-the

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VQTS con mUstmiddotbeqo~n~middotiJ1 prU9l1elwith the load protected against overloads by diodes

The Otlrrent~Coils are

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-FIGURE 1 WATTMETER CONNECnONS 14IJ -- -

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Balanced Load

F-4 Cent

Each wa~eter has tWomiddot Voltage mtinp (150 and- 800V)~ Rotating the range -switclirounterciOCkwise from OFF engages the 150 volt range Rotatmg the _range SWitch clOQkwise from O~ engages the 800 volt range Utilize the Voltmeters readiDg to determine the approprlllte-range

Each wattmetermiddot has three currentmiddot ratings (2 4 and SA) Rotating the range swiJchfrom middotO~engages the Samprarigefbst ~ the wattm~termiddotreadsbelow ~r 8Cll18 and the ammeter indicates that the 4 amp rating will not be ~e9 ~ectmiddotthe 4 ainp range-middot If the mttnie~ again reads below balt scaie and the ammeterindicates that the 2 amp rating will no~ bemiddot exceeded the 2 amp range may bese1ectedI

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L FIGURE 2 WATTMETER CONNECTIONS 3fi1

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L middot The totalwatbge is the sum of the two meter readings PI and P2

f When pow~ in a ~ced load is m~ured in this ~er the indication or the 1

two ~eterS VlLL~PT be the same except at 1D1ity power factor middot -shy

When the power factor of the circuit is less than 509b the pointer of meter PI will reverse~ To obtain total wattage in this case reverse the current connections to metet Pl -then subtract the rea~g ormeter PI from that of meter P2

The twO-wattmeter~method cannot be used with as-phase 4-wire load Three wattmeters are ~ in that case

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POWER FACTOR i f ~

Given a balallCed load the~oWer tacentor middoteanbe -d~emiined from the two wattmeter mth6cL - ~

L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

J be calca1ated -from-the -following_equation0

J ~

tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

wherep2 repr~ts th~~ier~thetwoWl1ttiJ1~ re~ingswhentbepower faeto~l~other thaD uPity

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BiDet th~powertaetb~ 8q1alsthcosme ofthephaseangletP~powerfactor may also be I deterJninedfromtheratioo~thetwo wittmeterreadings middotmiddotThegraph b~ow shows the1 I

I relationship between themiddotpowerfacior andth~ratio~f P1lP2 ~

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SERIES 100- OPERATING INSTRUCTIO-JS bull t

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MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

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DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

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agt If the currePtis~ter than 5 amperes the needlewDI move off-scale TuRN OFF POVER IMliEDIATELY AJf exception to this may be on motor starling Momenshytary current inrushbullmay exceed 5 ampe~ but theneedleiminediately drops back to normal

b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

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1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

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a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

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ENGINEERINGo 90RPORATION -----MANUFAeTURtRS OF poundQUIPMpoundNT lOR EDUCATION ANO INDUSTfty

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MODEL-1723 rACHoME~R

DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

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MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

L bull Fieci120VAC 15A~u~tWod~plex receptacles bull ~12OVAC single-pJiase2-~lOA bull FiX~208120VAC~phase 4-wire15A bull VariabJe 0 ~ 24oI14QVAC8-~i~~9A

f bull -Vari8bleO ~ 150vnQ-i~(lA isolated l~RMS L bull Variable 0 ~ 125VDCt 5Q -isolated ItlmiddotRMS middot

OPEBATIONTouSe the powermiddotpanelt (lISt tum ON ~MAIN AC circuit breaker~i This will m~tethemain AC pnot Hght and 9nergize the four-pin ~Pyen~i supplying fix~208120VAOtliree-phase poWer Th~ other 1ixed~d~Je sulpHes may

l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

cuit ~~ (both ~ ~ncl BEc) A clockwise lOtation of the vol~cpntro1 -- ~ ~eause ~~~~the voltage a~ble at the appropriate 1~Ptashy

L I tNOTE ~~ ~~ltage oo~~lbob fOr the 0-208120V three-phase sUpply is ~ted at the ~nd or the

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IfanY~r~es11PplifSri-e~vefloaded one or more circuit breakers may trip middotOFF Al- ir ways turnthemiddotVariable suppllesto zero and remove the C8usaopound the oyerload before resetshy

JL ting the circuitmiddotl~~em

A pindiilg ~ groun4 oenn~oDis proVided at each end or the panel fOrgrounding the rotating macbin~

ENGINEERING CORPORATION -----MANUFACTURERS OF eciuaPMENT R)R EOUCAT1ON AND INDUSTRV bull

PO Box 563 East ~ow IdA 91028 (413) S25-S9ff1 bull nx 95-5426 bull Fax (41~) S2S-4141

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Page 6: [1 Table D. - UTKweb.eecs.utk.edu/~jsl/ECE325/ECE325-LabManual.pdfLab #2 Load-Speed Characteristic of a DC Motor . Objective . The objective of . this . lab is to . detennine the load-speed

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Calcul~tions and Comparisions

L 1 Compare the experimental andcal~ulated results 2 eaicul~ thevoltage~gUlatiQn 3 Why was the eXcitatiOn~chnoiincluded in the calculations Did neglecting this excitation

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Lab 1 Wiring Diagram f L-

POVVER PANEL

0 0 0 0 0 12OVACtaoYAC 002401t~ AC4O-o4W ~AC At AI PAl bull oSOVDC bull sec PRJ bull UVDC bull sec

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l L Lab 2 Load-Speed Characteristic of a DC Motor

Objective

The objective of this lab is to detennine the load-speed characteristics ofa DC motor

rmiddot Part AL

1 The DC machine will be ron as a genetator at a constant speed- The armatureresistance (Ra) will 1 I bull -- becalculate4 to assist in plotting tbeSieed VSla annature current

l t Pre-Lab middotL

smiddot 1

I Calculate a synchronous motors rotor speed (f=60 HzN=120fp) for a machirie with four poles and fora machine with six poles

2 Calculate the value afbaclc emf ltEa) fora DC motor (Ka~ = 6944e-2 VRPM) with arotor

speedof 1800RPM with a rotor speed of 1000 ~ and with a rotor speed of0 RPM 3 Draw a circuit dia~ ofaDC machine connected as a separately excited generator (show

~ -resistance indilctance and voltage the field inductance and resistance~d the variableresistive load) Show how to conneCt a voltmeter to measure armature voltage and bow to connectmiddota ammeter tome8sure annafure current

Laboratory Exercise

L Laboiatmy Setup

1 ConneCt the DC machine as a se~tely excited generator and connect the synchronous mac1rlneas a motor as shown in Lab 2 Part A Wning Diagram

2 Mechnica11y couple the two machineS so that the synchronous motor drives the DC generator 3 Set the synchronous-machine to IND STARTt

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4 TurD on the main AC power S Tmn the syncllronoDs machine field voltage (0-150 VDC) to position 3 6 Set the synchronousmachine to $YNCH RUN 7 Make sure the rotor speed is 1800RPM

Laboratoty Measurements

( 1 Measure open circuit armature voltage (back emf) and field cmrent as the DC machina field

1 voltage (D-l25VDc) is increased Use field current (If) increments of about 005 A and vary shy

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If up to 05A 2 Set tbeDCmachin~s fieldvoltage to a value ~atbrings the open circuit annature voltage to

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12SVL 3 Measure the anna~ current (Ialand ~ature vol~ge(Vagt as theresistive load is increased I bull

i Do not exceed an annatme current of2At Record eoughpofuts to ~phtheVa VS In L charaCteristicbull

1 I Ca1culatio~s~amp Questions1shy

1 Plot back emf versus fie1ilCUlTent L

2 Plot ~~ture tenninalvoltagc versus armature current

3 Calculai~ta va1~eforannatureresistance (Ra) from the slope ofVa vsIamiddot - ---~~ ~l 4 ~atPtPose does the synchronous machine serve fot Part A~

Part B

The DC ma9bine will be ron as a DC shunt moftr~ The sPee4vs armaturecurrentchara~tic

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will be mcas1Jtcd andplotted and the effectof anna~ reacnon will be evaluated

Pre~Lab

L 1 DraJithecircuitdiagram ofa DCmiddotshunt motor

1 1 2 Defihe annatitte reaction shy

3 CalcnlateKa~forVt=Ea=125V at 1800 RPMmiddot

4~ Develop a re1ationshipmiddotof speed as a funeti()11 ofannl-~ ~nt Use the values of Vt andL KaW from above and assume that annature reaction is negligible I L

Laboratory Exercise

2 I -- LabomtotySetup t

I i 1 Set the ()lS0 VDCknob to position 3

2 Set the synchronous machine to SYNCH RUNt l

3 Co~ecttbeDCma~hine asa shunt motor and the middotsynchronousmiddotm~hineas a 3-phase ACL

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generator as shownin Lab 2 PartBWiring DIagram 4 Connect the variable three~phase resistive load to the oU1put tenninals of the synchronous)

L machine The resistance of the load will be increased to place a mechanical load on the DC motor (drawing more current through the DC motors armature)

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Laboratory Measurements

1~ U~ouple the two machines 2 Turn on main power 3 Set the PC armature voltage (by using the ~12S VDCknob) to 12SV 4 Adjust~eDC machine field rheostat to obtain a no-load speed of 1800 RPM

s Measure annature voltage and ~ature current at no-load

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6 TUrn theO-l2S VDe knob down to stop the motor (leave the field rheostat as it was set) 7bull Couple the motor andthe gener8m 8 Tmn th~ 0-125 VDe knob up to increas~ armature voltageto 12SyenL 9 Incre~~ the load onthe synchronous gCIieratorbull For each 3-phase load switch record the

annature current and the speedJ L

Calculations 1

L 1 Calculate the power consumed by the DC machine at noload(no-16ad losses)

I 2 Plot speed versus ~ature cocrent (a) from claculatedvalnesusing Rafrom Part A andIa = 0 L- tolS A (b) using experimentaldatagathered in Part B CoIPpare the two plots

3 H themiddotvaIueof Kaclgt decreas~s withhigb~annature current how is the speed effected~

4 How could one explain the ttiffercncesbetween dle experimental and theoretical plots Shouldannature reaction be neglected Use figures andor m~strations to support your answer

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Lab 2P~~t A Wiring Diagram

PQVIER PANa

0 Omiddot 0 0 0 12fNNJ t2OVAC MAlHAC PAt bull ot5OVDC bull SEC PAl bull o12SVDO bull SEC 12OVAC~~W

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Lab 2 Part B Wiring Diagram

POWER PANEL I bull

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120VAC 0-24011fOVAo-so-tW t2OVAC MAINAC PAl bull OmiddotSOVDC bull SEC PAL o-125VDC bull SEC tOVAC

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calculate the parameters ofan inductionmotorequivalent circUi~ and to compare the calculated values with measured values L

Pre-La))

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1 What are the two typeS ofrotOis used mAC inductlonmotorsl t 2 Give theequation for SYDchrono~ speed What is the synhronous speed for a four pole AC ~

L ~d-qctiltgtn~bine (standacent ~efrecFJe~) 3 Define slip for an induction motor If thesynchronous speed is 1800 RPM and the slip (s) is

L 001 what is the rotor speed Ifs == 011 -

l bull 4 Draw a power flow diagram for an AC induction ~otor

5~ middotmiddotDrawatorque VS~ sp~d curve for ail ACinduction motor What is the torqu~ prodnced at synchronous speed (Ns)

6 DescnDemiddot~ no-load test and the blocked rotor ~t for an induction motor Whatis the value ofslip for a Blocked ~otor Test

7 Draw the lEEE-recommended equivalent circuit~ shyL

Calculations C l

l Given the follow~g test results

fLj No-load test Line voltage= 210 V

Linecuxrent iO77 A

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Iiiputpower = 52 W L

I - Blocked-rotor test Line voltage ~ 60V shy tinecu1rent 17 AJ - shy

Input power == 100 W

Also given stator r~tance (Rl) =53 Wphase DL synchronous speed (COsyn) =1885 radlsec

L (R~ember that you are worldngwith a 3-phase machine)

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1 Calculate the parameters of the lEEE-~~ended equivalent circuit 2 Calculate the induction motornopad rotational Io~ 3 CalculateI2t I1t PF Fin Ptiutt Eff and ToutfQrslip v~ues fa11ging from 0 to O~l (with

L step siZe 001) (Pont =Pmech - Prot and Tout = Tmechgt

3 ~lot outputtorque versus speed ~ 4 Plot power factof versusoutput powe~ 5 piot AC)ine current versus outpu~power

i 6 it Plot efficiency versus outPut pow~ shy

LabormiddotatorY Exercise LabgratolY Setup

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L 1 S~tUP middottheOC machine as a sep~te1y excited generator with variableresistance load bank andthe wo~drotot motor as an indu~on motor to drivemiddotthe DC generator (Connect the

indu~Otimotorstatotwindirigsfu a delta confi8uration) This is shown in the Lab 3 Wiring Diagrallt ~

3 CQ~tXtawattmetet to measure power into the itlductionmotor 4 CoDnectDC meters tomeasure DC generator ~nniDalvoltage and armature current 5 Connect AC ~terStOmeasweline to neutral voltage and line current

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- Laboratoxy Me~ments

J 1 Mechanically conple the induction motor to the DC generator-

2 Bring the 3-phase AC voltage to 120V (line to n~tral) ~ I

i 3 Whenmiddotthe induction mot-or is running (around 1783 RPM) bring the nmiddotc machine terminal ~ ~ ~oi~ uP to 125 V middot

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(lOt andp~~rofone_p~e (WI)bull middot 5 RCCC~d DC generator values values ofvoltage at terminal (VVand armature current (Ia)

6 First take a set ofmeasurements with all the resistance switches off 1 middotTheD continuerecordingmiddotas theJoad is increased up to ACmiddotllne current of 15 A Do not

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CalctilationS

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~ 1 Calculate values for Pin Pout PF Eff~ atidTout

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l PF= WI (Vt(l-n) II)

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f 2 Plot ()utput torgue versus speed ( L- 3 Plotp01l-er fa~torve~u~middot outp~tpoer

4 Plot AC line current v~~outputpower f 5~i Plot~fficl~ncy verSusoutputPQwer L 6 Con1p~ethe ~resu1ts wi~thecalcu1ated results 7 CommeIJton the wisdom ofbuying an indu~on motor having a signijican~ygreaterporse i L power ra~g than iSrequiiedmiddot to dothejob~

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Lab 3 Wiring Diagram

PONERPANa

0 0 0 0 0 120VAC ~laquoNAD4O-4W 12OVoAC MAINC PAl bull o-1atNDC - SEC PAL bull 00121VDC bull SEC 12OVAC

0 ~ 0 0 GJ EJ []] 0 GJ ~ 0 ~ 0

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La) 4 Synchronous Motor

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L Objective

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L The objective of ~ lab is tomiddotexamine the terminal characteristics ofa synchronous motor under - I08(fand no-load conditions

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Pre-Lab

i - L 1 Whatisan important feature ofsynchronous motors

~ Dra~ariequivalentcircuit modetfor a synclnypousmotor ShowEf Xs Ra Iat~Vt If and

the fiel~winding 3 Descripe the open-eircuit test ~t is measured What is varied Sketch the circuit 4 Descn1le the short-circuit test Mat is measured What is varied Sketch the circuit 5 Sketehatt open~ircuit ch8rac~riStic aDd a short-circuit charac~eriStic Show Ia (rated) Vt

(rated) a11da modified airgaplineL

Laboratory Exercise f Part A L

The open-circuit and short-circuit tests will be performed to determine values f~r Xs and ~using

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the synchronous machine as a generator

Procedure

1 ~ Connect the DC machine as a selfexcited shunt generator 88 shown in Lab 4 Part A ~g

diagram

2 ~ Couple the DC machine to the syn6~nous machine f 3 Set the 0-125 VDCbob to zeromiddot L

4 Set the 0-150 VDC kn~b to zero 5 Set the synchron~us mac~e to INn START e

6 Bring the DC~cbine terminal voltage up to 125 Vt and adjust the field rheostat to obtain a speed of 1800~M

7 Set the sYnchronous machine to SYNCH RUN 8 Perform the open-circuit test With the synchronous machines terminals open measure the

( voltage across the windings (V00) as field current (If) in increased Increase the field current t - by increasing the DC voltage across the field winding Vary If from 0 to lA in increments of

l 9 OlA Set If to zero

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10 Perform the short-circuit test Short the ph~ windings of the synchronous machine and put

i i an ammeter in series with the shorted windings Measuremiddotthe average windingcurrent (Isc) as L

If in increased V~If from 0 to lA in increments ofOlA ( t

i L- Calculations

1 4~middotVt = Voc =120middotVcaJ~ulatcentmiddotXs and K(Xs =Voc IIsc andK= Voc I If)

2 P16tIIalvs If~(IIal =1Vt--KIf) I Xsi ) t L Part Bmiddot L The annatuIecurrentwill be measured agfield current is varied under loadmiddot and no loadconc1itions

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1 Connectfh~sySte~ as sbownin the Lab 4 Part Bwiring diagram but do not couple the syn~~riq~-~tiinetothe DC machine~

2 Senhe~chronousmac~to lND STARr 3 Thin tbe6-1S0vnpknobto position cO5~

4 TumODmailtpoiVer

( S S~ the synclnpnbusmachine tq ~YNCH RUN The motor speed should be 1800 RPM L 6 MeasureIa andItas If is varief1 up to lA

Load Procedure shy

1 TUm offmain power 2 Mechanically couplethe synchronous machine to the DC ~hine

3 Set~~ first nine switches of the resistance load to ON ) 4 Setthe-~chrononsmachine to lND START L

5 Turno~middot-m~~wer

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1~ 6 Tuni the~o-lS0VDCknob to position 20bull

~ 7 Settheo-l25VDCknobtoposition pound9 tbull

8 Set the synchronous machine to SYNCH RUN The motor speed should be at 1800 RPM 9bull Measure Ia and Ifas Ifis varied up to lA

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Calculations L

1 Plot Ia V8 If for load and no load conditions and compare with c~cu1ated graph

2 Is there a best~fieldcurrent at which the synchronous machine should be operated

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Lab 4 ~art A Wiring Diagram

POWER PANEL

middot0 0 o o PAl bull Ql25VOC bull sec 120VAC120VAO 0--240114OVACJJ44W 120VAC

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i -- Lab 4 ~Part B Wiring Diagram

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SERI~S100 OPERATINGINSTRUCTIONS amp bull ~

MODEL WRM-100-3A WOUND-ROTOR MOTOR

GENERAL The WRY-100-SA is a three-phase four pole wound-rotor motorconsisting of a stator winding and a rotor winding withldip rings and brushes A three-pole

~ circuit breaker ~ also provided in the termm81 box The nominal ratings of the motor ari~ circuit breaker are listed below r

1 J l-- SPECIFICATIONS MOTORL

WmdingTypeshy Wound Btafor amp Rotor Horsepower shy 13HP Speed shy 175QRPM Voltage bull 20SV bull Sf Amiddot or 860V-s+Y

I Frequency- 60Hz L- Rating Continuous

Full Load Current bull 17 Amps

CIRCUIT BREAKER

Type of Operator bull Rocker Switch L No of PoleS bull Three

Overload )pe bull Thermal Trip Rating shy 2DAmpS Reset Method - middotOW- to Reset

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in Figure L Rotate the Wound Rotor Speed Control ~b to the maximum resisshytance fttn~ counterclockwise direction With all th~ ~ce in the rotor cir middotcai~ the motor-willdevelop maxirilum starting torque and minimum ~g curshy

rent Pwih up the rocker switch on the circuit breaker~ startmiddottqemotorbull The motor will accelerateup to speed The rheostat providesthe mSansofv~g theL motors lQieedtorque characteristicS The effect of the rlieostat increUes with increasing load onthe motorr ~

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FIGURE 1

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GENERAL

SPECIFICATIONS

middotMODEL SMmiddot100middot3ASYNCHRONOUS MACHINE

ThemiddotSMmiddotI00-8A is a three-phase four-pole machine consisting of a wyedel~ stashytor andmiddot 8 quadrature rotor having a DC field winding and a damper winding A three-pole circUit breaker and a IND START-BYNC RUN switch are provided in the terminal OOx- RatingS fonow

SM-100-3A MOTOR ampALTERNATOR

Speed - 1800 RPM Voltagemiddot Max Ambient Temp Insulation bull Rating bull

CIRCUIT BREAKER

Type of~tor shyNo ofPoles bull Overload Type bull Trip Rating bull Reset Methoa shy

ALTERNATOR

Power-Load Current bull Fielti Excitation shy

MOTOR

HorSepowershyCurrent bull Frequencyshy

208120V-B+-4W 4~ (1047) ClassmiddotB Continuous

Rocker Three Thermal L7amps

middot middotOFF to Reset

250 watts 07 amp (nominal) Separate L6 amps

18 HP 17 Amps 60Hz

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OPERATION Th~ proper connections tor operation of th~ SMl00-SA ~ a ~clttonous (SYNCHRONOUS motor are shown in Figure middot1 With ~ ~tebin the SYNC RUNposiliou MOTOR) ~ze the vari~ble DC supply and adjusttbe~tput voltage from zero up to

th~ value which eauses 1 amp to flow through the rotor ~turn the switch to the lNDSTART PO$ition middotand Start the motor by toggling~becircuit breaker to

the ONposltion WJten the motor reaches DO lQad 1ij)eeC1 move the switch to the SYNC RUN posItion The rotor will then sYnchronize with the nn~ and fJ1e motor wiD be ti1mrlng at exactly 1800 RPvL Used to demonstrate the Wrious ~tics of synclirOnous motors

+VARIABlpound DC

_sUPPLY

STATOR ROTOR middotL1middot 11 A~~-eJ-----CJ

middot AC u l 12

~~YB~T middotJ3~T3

ct-O--ltr

VARIABLE + DC SUPPLY

FIGURE 1 SM-10o-3A AS A SYNCHRONOUS MoioR

ABC AC SUPPLY INPUT

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OPERATION The proper ampinn~~ fo~ operation or the SM-l00-SA as an alternator are ALTERNATOR) shown in Fi8Ure ~ With tliese connections made and the switch in the SYNCL RUNposition drive the alternator at 1800 RPM With a sUitable prime mover

Energize the DC Voltage supply and increase thesupplys output to bicrease f themiddotslternatorts output voltage to the desired value Toggle the circuit breaker ~L ~ tlie ON pPSition to connect the alternators output to the load Used to

middotdemonstrate the characteristics of a polyphase alternator of the stationary arshyr mature typebull ~t may also be used asthe loading device when testing the varishyI oUsmotom- shy

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OUTPUT

rmiddot~ FIGURE 2 L SM-10o-3A AS AN ALTERNATOR

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SERJES100 OPERATING INStRUCTIONS

oMOoDEL DMmiddot1 DDA DC MACHINE

GENERAL The DY-10OA is amiddot two-pole compound-wound machine ~g of a shunt field a series field and an armature winding A shunt fie1dmiddotr~t and two-pole startel switM are also provided in the-terminal box ~tings follow

SPECIFICAnONS

MACHINE

Shunt Field Ex SepO5A 125V Insulation CJass F middotMax Ambient Temp 40 ~C (104 OF) Rating Continl101iS Speed 1800 RPM nominal Shunt Series Compound wo~dJl1Otcr

125V SOAt 18 HP Shunt Series Compound wound generator

RHEOSTAT

Resistance Power Current middot Taper Fuse Minimum Resistance Position

STARTER

Type of Operator No of Poles Overload Type Trip Rating middot Reset Method

125V 2A 250KW

800~Ohms

100 Watts O575middotAmps Lin ear 1A SJo Blo

Toggle Two Thermal 4lAmps Push Toggle down

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L FUNCTION The primDrJ function or the DC motor is to demonstrate the characteristics of

shunt series ancl compOund motors~ It IIl8Y also bemiddotutiHzed as a prime mover when testiJlg a gel1eraloror alternator Using the DCmiddotmotor tor this PurPose has the advantage th~tbe speed may be held constant bymiddot8djusting tJie shunt field rheostat after each load step is applied

L OPERATION The -proper connections for operation as a ClUDulative compound DC motor are

(DC MOTOR) shOWDin Fipre i Withmiddot theseoonndionS made the motor may be started by moving the starter switch toggle up to the ON position It is good praetioe to stad the motor with the shunt field rh~ in its minimum resistance fully COW position to provide m8amum starting torque andmiDitnum starting Curshy

L rent The motor may then be adjusted ~ the desired speed byadjUBtingtbe field rheostat or varying the line voltage

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1 125VDO SUPPLY

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FUNCTION The DC generator is p~arily utili2ed to demonstrate the characteristics of shunt series ~dCOinpound gen~tors It is~ alsOusedastlle loading device

when testing the vari~us motors

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OPERATION The~CODnections tor operation as a cmnulative C()~po1l1ld nCgenshyeratorareshown in Figure 2 With these connectio~middotmiddotDltldeJ drive theJDCmiddotGENERATOR gen~-atapproxhnately1800RPM with a suitable p~e moVer With thefie1qrheostatJnits Jll8Ximum resistance fullyc1ocm~ position enshyergiZe thel15V DC field supply Rotate the field rheostatinthecltunter

shy clockwisedir$ctian middottoinCreasemiddot the output voltage middotto the desiredmiddot value Switch Oti~middotthemiddotoverloadmiddot switChmiddotto connect the generators output to the

resistance load

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OUTPUT

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The MG Bedplateconsists of a heayy s~ baBe n10~~middotmiddoton vibration pads The

I - GENERAL

function otthe bedplate is toe~le the quickmounting ~dcoup1mg of the two individ~ macbiDoes to form a completemiddotmiddotm~ior-Pnerator setpwothreaded hpldshy

~ down)1Ocks ~d winged screwsareprovidecltoseeurethe F t claJnps which hold tbeinBcbinetsmounting boards A couplingguard and two shaft ~gwrrds are p~

r vided to p~ttheSiudenttrom accidet1talJito~gor~~gwires0l1 rotatshy- shy ing)arts The guardsmiddotare quickly mounted bY insertirig retamer CUpS in~T~9tsin

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The procedure for mou~ting and ioupling the machines to the base is as fon~

L 1 A~just each wing screw 021- ~e two screw clamp hold~ownmiddot ~locks to the top of its threaded stud - 0

i 2 Place each ~chine so that the rear of the base is reSting agairistmiddotthemiddot thd rear clamp on thei L- MGbasemiddot

8 Slide machines iJiboara until ~elrcouplingl1anPs are centered oVer cen~ slots 4 bert rub coupnngmiddotsleevemiddot~toone of the mac1dnes co~pling 1IimgM~ L

5 Slidere~jning machines coupling flange into-the other side of couplbig sleeve 6 Checktobe Sure thatmiddot~e couplhig guard will cOver coupling when insertedmiddotinto one ot thel pails areenter slotsmiddot 7 plaCe front clamp tor each of machines against the front or the two macbiD5t bases

(- s 8 F~pr tighten ~~uts 9it middotthe two screw clamp hold-down biocks Lmiddot 9 Mount coUplini aDd shaft guards by locating appropriate retainer clips in slotS so that coushy

pling is ~der co~Ung guard and ~ sh~ is covered by a ~haft guatdL

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MODIL1-10oaA TRANSFClRfJIER OEMONSTRATOR

GENEijAL The TlOO-8A~~ts of three Single-phase bansformers wit~ m11Jtiple primary and secondary taps terminated atpinreceptacl~on the front of the unit Each of the three ~rOrinersmay beused independen1q Or the threemay~interconmiddot

f nected mseries~1npQmneJ or inmiddot many poJyph8seCbnfigurations

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EacbtraDslormer is~~middot af)vol~amperesat 60 Hertz ~ has two primary~d

two secoDdaqwindiIlBL Each ofthe priD1817 windiD~1tas800 turns of Nobull 24 gauge-wire and JSmiddotm~-120volta 05 amperes Onewhidingis tapped at 82 volts toprovide~~middotS~tttllp~(866$)middot~fthemiddot twomiddotwiDd1np~ 68ri~ Each or thesecondshylQ7middotwindh1pmiddot1uIs100t11rns of No 21 gauge wire and israted 60 volts 10 ampere One winding Js tappbd atmiddotlaquo volts to p~vide a Scott tapor the two windings in series Shownbelow are the voltage ratings orthe various taps for each of the three traDspoundormers

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t bull MODEL middotRLmiddot100AmiddotRESISTANC~LOAD J J- shy~ GENERAL The RL-IOOAfs variable ftsistance unit used to applya resistivel0a4middottogenera

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tors or altemators One unit may be used in single-phase applications ora bank L of tlmae units may be combhled intQ Wye or De1taCOnt1IJDlt1~DS tor three phase

applicmioDS TiieRL-lOOA mttoduces resistieload~ ~sequentild steps r designed to prod11CB approximateiy equal ipcremeJlts otJoadmiddot~tmiddot The SPST f ~ toigle switches are numbered andmiddot must be cloSed in nUD1erl~ordertodecrease

totlreslstance~creasmglOad The total ~cemiddot or the cOb~ected~rs ( may be COmputed f~theequation L

middot 1 1 1-1 ~=R1+Ri+lt8middotmiddotmiddot

The ConowingO equations may be used to detemUne the power disSipated from a measurement of load currentor voltage

L P=EI = = I~

p (ampp) = 8 xEpBPH (tor balanced ioad)

Where P=P~inWatb

E =yoltage inVolfB I = Currentin Amperes

f R =Resistance in Ohms L P(Stp) =middotmiddotTotalPower for Three-Phase

~H ==~ Voltage per Phase~r Load Bankf L bull IpH = Ourrent per Phase ofLoad Bank ampshy

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~ SERIES 100 OPmiddotERATmiddotING INSTRUCTIONS

MODEL RLC-100RESmiddotISTANCE-REACTANmiddotCE LOAD

The RLCl00 ismiddota variable resistance and--reactance- (either ~ductive or capaci- tive) uDit that ~y be used _to apply a singl~plmse or a three-phase load The remstive load (w~ can be ~ for both middotACcd DC) is controDed by siz SPST toggle switches e8ch of which puts 2000 ohlnaof resistance in paraDelmiddot lor all three phases simultaneouslybullThe resistive-load is therefore always balanced The total resistance in eacli ph8se equals 2000- ohms divided by the Dumber of switches closed For example with two sWitehesclosedtbe total resistance-is 1000 ohms rith aUsiZ closed 8888 ohms Each or the three reactance loads (used forAC o~) separateVfused at 1 amp is controlled by a knob that varltlSthe degreeopound lead andmiddot l8g A clockwise rotationof the middotknob applies leadiIlg pOwer factor (cashypaCitive)loid while a counterc1~ rotation appIiesa lagging power factor (inductive) load There is DO lpadapplied whenthe-knob is in mid position

The 8-4-5 right triangle graph below may bemiddot~ to approximate a O~8 power factor leading or lagging

1 Appfi a resistiVe load 2 Readthe in-phase current h from -the ammeter 8 From the lR value on tlie horizontal base of the graph travel vertically to the

point where it intersects the 08 PF (total amps) line 4 Frommiddotthis point travel horizontally to the reactive current wlueIz 5 Adjust the ~ve load until the Ix ammeter reads this value of reactive cur

rent

6 To obtain a ~ced load in a three-phaseconfigaratioD repeat Step -5 for the other two~

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middotINDUCTANCEDIAL POSITIONmiddot (~middotQLJNT~RCmiddotLOCKWJSE)

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middot11 ~ 57 Henry

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-7 97 HefJry

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DIAL POSITION CAPACITANCE (CLOCKWISE)

0 69 llF

1 1~57 J1F

2 316 J1F

3 501Jlf

middot4 640J1F

5 80~J1f

6 985 j1f 7 1160middotpF

8 1360J1Fmiddot

9 1609middotJ1F

10 18~JtF

11 2007~middotF

12 2170 fLF

13 2513 )iFmiddot

14 2860J1F

15 3090 pFmiddot

15 3269JlF

17 3539 JlFmiddot (

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SERIES 100OPERATING INSTAUCTIONS L

- -

-

MODJL ACVA-10()ACMETERINGPANEL L GENERAL The HAMPDEN Model ACVA-1OO consistsmiddotol two AC ammetem and one AC voltshy

meterA11 or the meters are dioaeprot8cted against overloads as high 1Ui 1000f

The ~ltmeter islicctt8 within 8 w1UIemiddotthe ammeters are accurate wi~hin ~ plusmn29D ormiddotfWl sCale dellection The middotme~rshave the following ranges

r I AC Voltm~teI Oto l00~OO V~ts ~ AC Amme~ OtlJQ5f2f4l8-Amps

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OPERATION

AC AMMETERS

L 1 Connect the ammeter in series so that the middotentire AC current to be measured passes

I through the ~~ter The test lead from the dark blue middotbindingpostis connected to one

side or the Dne and the test lead trom the Qrange bin~ post to the other ~ L

2 ~e choice or measuring range is iet with the range switch Fourmiddotranges are avaiiable O 05 0204 an~ 0 - 8 amperes

8 Set the rangemiddotswitch on the 8 ampere range Detore turning on the power

a) When ~ to measure motor current put a jumper lead between the tWo binding poststo protect the movement from the large inrushcurrent at start This jumper is

(

removed after the motor has started

--~---~--~_--------~---_~_----ENGINEERfNG CORPORATION

MANUFACTURERSmiddotOF rpUIPMCNT F()R EDUCATION AND INDUSTRY

L POmiddotBoxS63 East Longmeadow MA 01028middot (413) 525-3981 bull TLX 9gt5426 bull Pax (413) S2S-474i

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MODELACWM-1 GO WATIMETER PANEL

GENERAL The1iAMPDEN Model ACWMmiddotI00 consists artwo Iilulti-rangewattmeters and

I tbe~tchesh-lh~r operation Eacli has ~e follOwing ranges l

)to 1~30016~1200W

(150300Volts 2148 Amps)

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OPERATION Measure wattage bymiddotconn8cling a wattmetervoltmeter andmiddot~ete~8sshownin Figtt81 The ~-MPstttOn mustO be~middotconn~middotin series- with the ioad and-the

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The Otlrrent~Coils are

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-FIGURE 1 WATTMETER CONNECnONS 14IJ -- -

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Each wa~eter has tWomiddot Voltage mtinp (150 and- 800V)~ Rotating the range -switclirounterciOCkwise from OFF engages the 150 volt range Rotatmg the _range SWitch clOQkwise from O~ engages the 800 volt range Utilize the Voltmeters readiDg to determine the approprlllte-range

Each wattmetermiddot has three currentmiddot ratings (2 4 and SA) Rotating the range swiJchfrom middotO~engages the Samprarigefbst ~ the wattm~termiddotreadsbelow ~r 8Cll18 and the ammeter indicates that the 4 amp rating will not be ~e9 ~ectmiddotthe 4 ainp range-middot If the mttnie~ again reads below balt scaie and the ammeterindicates that the 2 amp rating will no~ bemiddot exceeded the 2 amp range may bese1ectedI

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L FIGURE 2 WATTMETER CONNECTIONS 3fi1

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L middot The totalwatbge is the sum of the two meter readings PI and P2

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two ~eterS VlLL~PT be the same except at 1D1ity power factor middot -shy

When the power factor of the circuit is less than 509b the pointer of meter PI will reverse~ To obtain total wattage in this case reverse the current connections to metet Pl -then subtract the rea~g ormeter PI from that of meter P2

The twO-wattmeter~method cannot be used with as-phase 4-wire load Three wattmeters are ~ in that case

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L Po Box 563 EastLcmgm~~owMi 01028 (413) 525middot3981 bull~middot9S-S42~ bull Pax (413)525-4741

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POWER FACTOR i f ~

Given a balallCed load the~oWer tacentor middoteanbe -d~emiined from the two wattmeter mth6cL - ~

L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

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tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

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MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

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DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

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b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

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1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

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a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

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MODEL-1723 rACHoME~R

DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

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MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

L bull Fieci120VAC 15A~u~tWod~plex receptacles bull ~12OVAC single-pJiase2-~lOA bull FiX~208120VAC~phase 4-wire15A bull VariabJe 0 ~ 24oI14QVAC8-~i~~9A

f bull -Vari8bleO ~ 150vnQ-i~(lA isolated l~RMS L bull Variable 0 ~ 125VDCt 5Q -isolated ItlmiddotRMS middot

OPEBATIONTouSe the powermiddotpanelt (lISt tum ON ~MAIN AC circuit breaker~i This will m~tethemain AC pnot Hght and 9nergize the four-pin ~Pyen~i supplying fix~208120VAOtliree-phase poWer Th~ other 1ixed~d~Je sulpHes may

l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

cuit ~~ (both ~ ~ncl BEc) A clockwise lOtation of the vol~cpntro1 -- ~ ~eause ~~~~the voltage a~ble at the appropriate 1~Ptashy

L I tNOTE ~~ ~~ltage oo~~lbob fOr the 0-208120V three-phase sUpply is ~ted at the ~nd or the

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IfanY~r~es11PplifSri-e~vefloaded one or more circuit breakers may trip middotOFF Al- ir ways turnthemiddotVariable suppllesto zero and remove the C8usaopound the oyerload before resetshy

JL ting the circuitmiddotl~~em

A pindiilg ~ groun4 oenn~oDis proVided at each end or the panel fOrgrounding the rotating macbin~

ENGINEERING CORPORATION -----MANUFACTURERS OF eciuaPMENT R)R EOUCAT1ON AND INDUSTRV bull

PO Box 563 East ~ow IdA 91028 (413) S25-S9ff1 bull nx 95-5426 bull Fax (41~) S2S-4141

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Page 7: [1 Table D. - UTKweb.eecs.utk.edu/~jsl/ECE325/ECE325-LabManual.pdfLab #2 Load-Speed Characteristic of a DC Motor . Objective . The objective of . this . lab is to . detennine the load-speed

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Lab 1 Wiring Diagram f L-

POVVER PANEL

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l L Lab 2 Load-Speed Characteristic of a DC Motor

Objective

The objective of this lab is to detennine the load-speed characteristics ofa DC motor

rmiddot Part AL

1 The DC machine will be ron as a genetator at a constant speed- The armatureresistance (Ra) will 1 I bull -- becalculate4 to assist in plotting tbeSieed VSla annature current

l t Pre-Lab middotL

smiddot 1

I Calculate a synchronous motors rotor speed (f=60 HzN=120fp) for a machirie with four poles and fora machine with six poles

2 Calculate the value afbaclc emf ltEa) fora DC motor (Ka~ = 6944e-2 VRPM) with arotor

speedof 1800RPM with a rotor speed of 1000 ~ and with a rotor speed of0 RPM 3 Draw a circuit dia~ ofaDC machine connected as a separately excited generator (show

~ -resistance indilctance and voltage the field inductance and resistance~d the variableresistive load) Show how to conneCt a voltmeter to measure armature voltage and bow to connectmiddota ammeter tome8sure annafure current

Laboratory Exercise

L Laboiatmy Setup

1 ConneCt the DC machine as a se~tely excited generator and connect the synchronous mac1rlneas a motor as shown in Lab 2 Part A Wning Diagram

2 Mechnica11y couple the two machineS so that the synchronous motor drives the DC generator 3 Set the synchronous-machine to IND STARTt

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4 TurD on the main AC power S Tmn the syncllronoDs machine field voltage (0-150 VDC) to position 3 6 Set the synchronousmachine to $YNCH RUN 7 Make sure the rotor speed is 1800RPM

Laboratoty Measurements

( 1 Measure open circuit armature voltage (back emf) and field cmrent as the DC machina field

1 voltage (D-l25VDc) is increased Use field current (If) increments of about 005 A and vary shy

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If up to 05A 2 Set tbeDCmachin~s fieldvoltage to a value ~atbrings the open circuit annature voltage to

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12SVL 3 Measure the anna~ current (Ialand ~ature vol~ge(Vagt as theresistive load is increased I bull

i Do not exceed an annatme current of2At Record eoughpofuts to ~phtheVa VS In L charaCteristicbull

1 I Ca1culatio~s~amp Questions1shy

1 Plot back emf versus fie1ilCUlTent L

2 Plot ~~ture tenninalvoltagc versus armature current

3 Calculai~ta va1~eforannatureresistance (Ra) from the slope ofVa vsIamiddot - ---~~ ~l 4 ~atPtPose does the synchronous machine serve fot Part A~

Part B

The DC ma9bine will be ron as a DC shunt moftr~ The sPee4vs armaturecurrentchara~tic

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will be mcas1Jtcd andplotted and the effectof anna~ reacnon will be evaluated

Pre~Lab

L 1 DraJithecircuitdiagram ofa DCmiddotshunt motor

1 1 2 Defihe annatitte reaction shy

3 CalcnlateKa~forVt=Ea=125V at 1800 RPMmiddot

4~ Develop a re1ationshipmiddotof speed as a funeti()11 ofannl-~ ~nt Use the values of Vt andL KaW from above and assume that annature reaction is negligible I L

Laboratory Exercise

2 I -- LabomtotySetup t

I i 1 Set the ()lS0 VDCknob to position 3

2 Set the synchronous machine to SYNCH RUNt l

3 Co~ecttbeDCma~hine asa shunt motor and the middotsynchronousmiddotm~hineas a 3-phase ACL

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generator as shownin Lab 2 PartBWiring DIagram 4 Connect the variable three~phase resistive load to the oU1put tenninals of the synchronous)

L machine The resistance of the load will be increased to place a mechanical load on the DC motor (drawing more current through the DC motors armature)

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6

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Laboratory Measurements

1~ U~ouple the two machines 2 Turn on main power 3 Set the PC armature voltage (by using the ~12S VDCknob) to 12SV 4 Adjust~eDC machine field rheostat to obtain a no-load speed of 1800 RPM

s Measure annature voltage and ~ature current at no-load

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6 TUrn theO-l2S VDe knob down to stop the motor (leave the field rheostat as it was set) 7bull Couple the motor andthe gener8m 8 Tmn th~ 0-125 VDe knob up to increas~ armature voltageto 12SyenL 9 Incre~~ the load onthe synchronous gCIieratorbull For each 3-phase load switch record the

annature current and the speedJ L

Calculations 1

L 1 Calculate the power consumed by the DC machine at noload(no-16ad losses)

I 2 Plot speed versus ~ature cocrent (a) from claculatedvalnesusing Rafrom Part A andIa = 0 L- tolS A (b) using experimentaldatagathered in Part B CoIPpare the two plots

3 H themiddotvaIueof Kaclgt decreas~s withhigb~annature current how is the speed effected~

4 How could one explain the ttiffercncesbetween dle experimental and theoretical plots Shouldannature reaction be neglected Use figures andor m~strations to support your answer

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Lab 2P~~t A Wiring Diagram

PQVIER PANa

0 Omiddot 0 0 0 12fNNJ t2OVAC MAlHAC PAt bull ot5OVDC bull SEC PAl bull o12SVDO bull SEC 12OVAC~~W

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Lab 2 Part B Wiring Diagram

POWER PANEL I bull

1 i 0 0 Omiddot 0 0lshy

120VAC 0-24011fOVAo-so-tW t2OVAC MAINAC PAl bull OmiddotSOVDC bull SEC PAL o-125VDC bull SEC tOVAC

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L Objectivemiddotmiddot

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calculate the parameters ofan inductionmotorequivalent circUi~ and to compare the calculated values with measured values L

Pre-La))

(

1 What are the two typeS ofrotOis used mAC inductlonmotorsl t 2 Give theequation for SYDchrono~ speed What is the synhronous speed for a four pole AC ~

L ~d-qctiltgtn~bine (standacent ~efrecFJe~) 3 Define slip for an induction motor If thesynchronous speed is 1800 RPM and the slip (s) is

L 001 what is the rotor speed Ifs == 011 -

l bull 4 Draw a power flow diagram for an AC induction ~otor

5~ middotmiddotDrawatorque VS~ sp~d curve for ail ACinduction motor What is the torqu~ prodnced at synchronous speed (Ns)

6 DescnDemiddot~ no-load test and the blocked rotor ~t for an induction motor Whatis the value ofslip for a Blocked ~otor Test

7 Draw the lEEE-recommended equivalent circuit~ shyL

Calculations C l

l Given the follow~g test results

fLj No-load test Line voltage= 210 V

Linecuxrent iO77 A

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Iiiputpower = 52 W L

I - Blocked-rotor test Line voltage ~ 60V shy tinecu1rent 17 AJ - shy

Input power == 100 W

Also given stator r~tance (Rl) =53 Wphase DL synchronous speed (COsyn) =1885 radlsec

L (R~ember that you are worldngwith a 3-phase machine)

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1 Calculate the parameters of the lEEE-~~ended equivalent circuit 2 Calculate the induction motornopad rotational Io~ 3 CalculateI2t I1t PF Fin Ptiutt Eff and ToutfQrslip v~ues fa11ging from 0 to O~l (with

L step siZe 001) (Pont =Pmech - Prot and Tout = Tmechgt

3 ~lot outputtorque versus speed ~ 4 Plot power factof versusoutput powe~ 5 piot AC)ine current versus outpu~power

i 6 it Plot efficiency versus outPut pow~ shy

LabormiddotatorY Exercise LabgratolY Setup

J

L 1 S~tUP middottheOC machine as a sep~te1y excited generator with variableresistance load bank andthe wo~drotot motor as an indu~on motor to drivemiddotthe DC generator (Connect the

indu~Otimotorstatotwindirigsfu a delta confi8uration) This is shown in the Lab 3 Wiring Diagrallt ~

3 CQ~tXtawattmetet to measure power into the itlductionmotor 4 CoDnectDC meters tomeasure DC generator ~nniDalvoltage and armature current 5 Connect AC ~terStOmeasweline to neutral voltage and line current

j 1

- Laboratoxy Me~ments

J 1 Mechanically conple the induction motor to the DC generator-

2 Bring the 3-phase AC voltage to 120V (line to n~tral) ~ I

i 3 Whenmiddotthe induction mot-or is running (around 1783 RPM) bring the nmiddotc machine terminal ~ ~ ~oi~ uP to 125 V middot

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(lOt andp~~rofone_p~e (WI)bull middot 5 RCCC~d DC generator values values ofvoltage at terminal (VVand armature current (Ia)

6 First take a set ofmeasurements with all the resistance switches off 1 middotTheD continuerecordingmiddotas theJoad is increased up to ACmiddotllne current of 15 A Do not

exceedthis currentlimitl1

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CalctilationS

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~ 1 Calculate values for Pin Pout PF Eff~ atidTout

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l PF= WI (Vt(l-n) II)

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L Tout= Pout6012nN

f 2 Plot ()utput torgue versus speed ( L- 3 Plotp01l-er fa~torve~u~middot outp~tpoer

4 Plot AC line current v~~outputpower f 5~i Plot~fficl~ncy verSusoutputPQwer L 6 Con1p~ethe ~resu1ts wi~thecalcu1ated results 7 CommeIJton the wisdom ofbuying an indu~on motor having a signijican~ygreaterporse i L power ra~g than iSrequiiedmiddot to dothejob~

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Lab 3 Wiring Diagram

PONERPANa

0 0 0 0 0 120VAC ~laquoNAD4O-4W 12OVoAC MAINC PAl bull o-1atNDC - SEC PAL bull 00121VDC bull SEC 12OVAC

0 ~ 0 0 GJ EJ []] 0 GJ ~ 0 ~ 0

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La) 4 Synchronous Motor

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L Objective

i

L The objective of ~ lab is tomiddotexamine the terminal characteristics ofa synchronous motor under - I08(fand no-load conditions

i L

Pre-Lab

i - L 1 Whatisan important feature ofsynchronous motors

~ Dra~ariequivalentcircuit modetfor a synclnypousmotor ShowEf Xs Ra Iat~Vt If and

the fiel~winding 3 Descripe the open-eircuit test ~t is measured What is varied Sketch the circuit 4 Descn1le the short-circuit test Mat is measured What is varied Sketch the circuit 5 Sketehatt open~ircuit ch8rac~riStic aDd a short-circuit charac~eriStic Show Ia (rated) Vt

(rated) a11da modified airgaplineL

Laboratory Exercise f Part A L

The open-circuit and short-circuit tests will be performed to determine values f~r Xs and ~using

LI

the synchronous machine as a generator

Procedure

1 ~ Connect the DC machine as a selfexcited shunt generator 88 shown in Lab 4 Part A ~g

diagram

2 ~ Couple the DC machine to the syn6~nous machine f 3 Set the 0-125 VDCbob to zeromiddot L

4 Set the 0-150 VDC kn~b to zero 5 Set the synchron~us mac~e to INn START e

6 Bring the DC~cbine terminal voltage up to 125 Vt and adjust the field rheostat to obtain a speed of 1800~M

7 Set the sYnchronous machine to SYNCH RUN 8 Perform the open-circuit test With the synchronous machines terminals open measure the

( voltage across the windings (V00) as field current (If) in increased Increase the field current t - by increasing the DC voltage across the field winding Vary If from 0 to lA in increments of

l 9 OlA Set If to zero

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10 Perform the short-circuit test Short the ph~ windings of the synchronous machine and put

i i an ammeter in series with the shorted windings Measuremiddotthe average windingcurrent (Isc) as L

If in increased V~If from 0 to lA in increments ofOlA ( t

i L- Calculations

1 4~middotVt = Voc =120middotVcaJ~ulatcentmiddotXs and K(Xs =Voc IIsc andK= Voc I If)

2 P16tIIalvs If~(IIal =1Vt--KIf) I Xsi ) t L Part Bmiddot L The annatuIecurrentwill be measured agfield current is varied under loadmiddot and no loadconc1itions

L-

-

1 Connectfh~sySte~ as sbownin the Lab 4 Part Bwiring diagram but do not couple the syn~~riq~-~tiinetothe DC machine~

2 Senhe~chronousmac~to lND STARr 3 Thin tbe6-1S0vnpknobto position cO5~

4 TumODmailtpoiVer

( S S~ the synclnpnbusmachine tq ~YNCH RUN The motor speed should be 1800 RPM L 6 MeasureIa andItas If is varief1 up to lA

Load Procedure shy

1 TUm offmain power 2 Mechanically couplethe synchronous machine to the DC ~hine

3 Set~~ first nine switches of the resistance load to ON ) 4 Setthe-~chrononsmachine to lND START L

5 Turno~middot-m~~wer

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1~ 6 Tuni the~o-lS0VDCknob to position 20bull

~ 7 Settheo-l25VDCknobtoposition pound9 tbull

8 Set the synchronous machine to SYNCH RUN The motor speed should be at 1800 RPM 9bull Measure Ia and Ifas Ifis varied up to lA

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1 Plot Ia V8 If for load and no load conditions and compare with c~cu1ated graph

2 Is there a best~fieldcurrent at which the synchronous machine should be operated

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POWER PANEL

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SERI~S100 OPERATINGINSTRUCTIONS amp bull ~

MODEL WRM-100-3A WOUND-ROTOR MOTOR

GENERAL The WRY-100-SA is a three-phase four pole wound-rotor motorconsisting of a stator winding and a rotor winding withldip rings and brushes A three-pole

~ circuit breaker ~ also provided in the termm81 box The nominal ratings of the motor ari~ circuit breaker are listed below r

1 J l-- SPECIFICATIONS MOTORL

WmdingTypeshy Wound Btafor amp Rotor Horsepower shy 13HP Speed shy 175QRPM Voltage bull 20SV bull Sf Amiddot or 860V-s+Y

I Frequency- 60Hz L- Rating Continuous

Full Load Current bull 17 Amps

CIRCUIT BREAKER

Type of Operator bull Rocker Switch L No of PoleS bull Three

Overload )pe bull Thermal Trip Rating shy 2DAmpS Reset Method - middotOW- to Reset

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in Figure L Rotate the Wound Rotor Speed Control ~b to the maximum resisshytance fttn~ counterclockwise direction With all th~ ~ce in the rotor cir middotcai~ the motor-willdevelop maxirilum starting torque and minimum ~g curshy

rent Pwih up the rocker switch on the circuit breaker~ startmiddottqemotorbull The motor will accelerateup to speed The rheostat providesthe mSansofv~g theL motors lQieedtorque characteristicS The effect of the rlieostat increUes with increasing load onthe motorr ~

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A 6 C AC INPUT SI1PPLY

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FIGURE 1

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GENERAL

SPECIFICATIONS

middotMODEL SMmiddot100middot3ASYNCHRONOUS MACHINE

ThemiddotSMmiddotI00-8A is a three-phase four-pole machine consisting of a wyedel~ stashytor andmiddot 8 quadrature rotor having a DC field winding and a damper winding A three-pole circUit breaker and a IND START-BYNC RUN switch are provided in the terminal OOx- RatingS fonow

SM-100-3A MOTOR ampALTERNATOR

Speed - 1800 RPM Voltagemiddot Max Ambient Temp Insulation bull Rating bull

CIRCUIT BREAKER

Type of~tor shyNo ofPoles bull Overload Type bull Trip Rating bull Reset Methoa shy

ALTERNATOR

Power-Load Current bull Fielti Excitation shy

MOTOR

HorSepowershyCurrent bull Frequencyshy

208120V-B+-4W 4~ (1047) ClassmiddotB Continuous

Rocker Three Thermal L7amps

middot middotOFF to Reset

250 watts 07 amp (nominal) Separate L6 amps

18 HP 17 Amps 60Hz

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OPERATION Th~ proper connections tor operation of th~ SMl00-SA ~ a ~clttonous (SYNCHRONOUS motor are shown in Figure middot1 With ~ ~tebin the SYNC RUNposiliou MOTOR) ~ze the vari~ble DC supply and adjusttbe~tput voltage from zero up to

th~ value which eauses 1 amp to flow through the rotor ~turn the switch to the lNDSTART PO$ition middotand Start the motor by toggling~becircuit breaker to

the ONposltion WJten the motor reaches DO lQad 1ij)eeC1 move the switch to the SYNC RUN posItion The rotor will then sYnchronize with the nn~ and fJ1e motor wiD be ti1mrlng at exactly 1800 RPvL Used to demonstrate the Wrious ~tics of synclirOnous motors

+VARIABlpound DC

_sUPPLY

STATOR ROTOR middotL1middot 11 A~~-eJ-----CJ

middot AC u l 12

~~YB~T middotJ3~T3

ct-O--ltr

VARIABLE + DC SUPPLY

FIGURE 1 SM-10o-3A AS A SYNCHRONOUS MoioR

ABC AC SUPPLY INPUT

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OPERATION The proper ampinn~~ fo~ operation or the SM-l00-SA as an alternator are ALTERNATOR) shown in Fi8Ure ~ With tliese connections made and the switch in the SYNCL RUNposition drive the alternator at 1800 RPM With a sUitable prime mover

Energize the DC Voltage supply and increase thesupplys output to bicrease f themiddotslternatorts output voltage to the desired value Toggle the circuit breaker ~L ~ tlie ON pPSition to connect the alternators output to the load Used to

middotdemonstrate the characteristics of a polyphase alternator of the stationary arshyr mature typebull ~t may also be used asthe loading device when testing the varishyI oUsmotom- shy

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OUTPUT

rmiddot~ FIGURE 2 L SM-10o-3A AS AN ALTERNATOR

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SERJES100 OPERATING INStRUCTIONS

oMOoDEL DMmiddot1 DDA DC MACHINE

GENERAL The DY-10OA is amiddot two-pole compound-wound machine ~g of a shunt field a series field and an armature winding A shunt fie1dmiddotr~t and two-pole startel switM are also provided in the-terminal box ~tings follow

SPECIFICAnONS

MACHINE

Shunt Field Ex SepO5A 125V Insulation CJass F middotMax Ambient Temp 40 ~C (104 OF) Rating Continl101iS Speed 1800 RPM nominal Shunt Series Compound wo~dJl1Otcr

125V SOAt 18 HP Shunt Series Compound wound generator

RHEOSTAT

Resistance Power Current middot Taper Fuse Minimum Resistance Position

STARTER

Type of Operator No of Poles Overload Type Trip Rating middot Reset Method

125V 2A 250KW

800~Ohms

100 Watts O575middotAmps Lin ear 1A SJo Blo

Toggle Two Thermal 4lAmps Push Toggle down

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L FUNCTION The primDrJ function or the DC motor is to demonstrate the characteristics of

shunt series ancl compOund motors~ It IIl8Y also bemiddotutiHzed as a prime mover when testiJlg a gel1eraloror alternator Using the DCmiddotmotor tor this PurPose has the advantage th~tbe speed may be held constant bymiddot8djusting tJie shunt field rheostat after each load step is applied

L OPERATION The -proper connections for operation as a ClUDulative compound DC motor are

(DC MOTOR) shOWDin Fipre i Withmiddot theseoonndionS made the motor may be started by moving the starter switch toggle up to the ON position It is good praetioe to stad the motor with the shunt field rh~ in its minimum resistance fully COW position to provide m8amum starting torque andmiDitnum starting Curshy

L rent The motor may then be adjusted ~ the desired speed byadjUBtingtbe field rheostat or varying the line voltage

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1 125VDO SUPPLY

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FUNCTION The DC generator is p~arily utili2ed to demonstrate the characteristics of shunt series ~dCOinpound gen~tors It is~ alsOusedastlle loading device

when testing the vari~us motors

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OPERATION The~CODnections tor operation as a cmnulative C()~po1l1ld nCgenshyeratorareshown in Figure 2 With these connectio~middotmiddotDltldeJ drive theJDCmiddotGENERATOR gen~-atapproxhnately1800RPM with a suitable p~e moVer With thefie1qrheostatJnits Jll8Ximum resistance fullyc1ocm~ position enshyergiZe thel15V DC field supply Rotate the field rheostatinthecltunter

shy clockwisedir$ctian middottoinCreasemiddot the output voltage middotto the desiredmiddot value Switch Oti~middotthemiddotoverloadmiddot switChmiddotto connect the generators output to the

resistance load

+ 1151 DC - 230 W

OUTPUT

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MODEL MGmiddotBmiddot100DG BEDPLATE f

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The MG Bedplateconsists of a heayy s~ baBe n10~~middotmiddoton vibration pads The

I - GENERAL

function otthe bedplate is toe~le the quickmounting ~dcoup1mg of the two individ~ macbiDoes to form a completemiddotmiddotm~ior-Pnerator setpwothreaded hpldshy

~ down)1Ocks ~d winged screwsareprovidecltoseeurethe F t claJnps which hold tbeinBcbinetsmounting boards A couplingguard and two shaft ~gwrrds are p~

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The procedure for mou~ting and ioupling the machines to the base is as fon~

L 1 A~just each wing screw 021- ~e two screw clamp hold~ownmiddot ~locks to the top of its threaded stud - 0

i 2 Place each ~chine so that the rear of the base is reSting agairistmiddotthemiddot thd rear clamp on thei L- MGbasemiddot

8 Slide machines iJiboara until ~elrcouplingl1anPs are centered oVer cen~ slots 4 bert rub coupnngmiddotsleevemiddot~toone of the mac1dnes co~pling 1IimgM~ L

5 Slidere~jning machines coupling flange into-the other side of couplbig sleeve 6 Checktobe Sure thatmiddot~e couplhig guard will cOver coupling when insertedmiddotinto one ot thel pails areenter slotsmiddot 7 plaCe front clamp tor each of machines against the front or the two macbiD5t bases

(- s 8 F~pr tighten ~~uts 9it middotthe two screw clamp hold-down biocks Lmiddot 9 Mount coUplini aDd shaft guards by locating appropriate retainer clips in slotS so that coushy

pling is ~der co~Ung guard and ~ sh~ is covered by a ~haft guatdL

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SERIES 100 -OPERATINGINSTRUCTIONS

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MODIL1-10oaA TRANSFClRfJIER OEMONSTRATOR

GENEijAL The TlOO-8A~~ts of three Single-phase bansformers wit~ m11Jtiple primary and secondary taps terminated atpinreceptacl~on the front of the unit Each of the three ~rOrinersmay beused independen1q Or the threemay~interconmiddot

f nected mseries~1npQmneJ or inmiddot many poJyph8seCbnfigurations

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EacbtraDslormer is~~middot af)vol~amperesat 60 Hertz ~ has two primary~d

two secoDdaqwindiIlBL Each ofthe priD1817 windiD~1tas800 turns of Nobull 24 gauge-wire and JSmiddotm~-120volta 05 amperes Onewhidingis tapped at 82 volts toprovide~~middotS~tttllp~(866$)middot~fthemiddot twomiddotwiDd1np~ 68ri~ Each or thesecondshylQ7middotwindh1pmiddot1uIs100t11rns of No 21 gauge wire and israted 60 volts 10 ampere One winding Js tappbd atmiddotlaquo volts to p~vide a Scott tapor the two windings in series Shownbelow are the voltage ratings orthe various taps for each of the three traDspoundormers

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t o 32V 120V 0 120V lI__

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t bull MODEL middotRLmiddot100AmiddotRESISTANC~LOAD J J- shy~ GENERAL The RL-IOOAfs variable ftsistance unit used to applya resistivel0a4middottogenera

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tors or altemators One unit may be used in single-phase applications ora bank L of tlmae units may be combhled intQ Wye or De1taCOnt1IJDlt1~DS tor three phase

applicmioDS TiieRL-lOOA mttoduces resistieload~ ~sequentild steps r designed to prod11CB approximateiy equal ipcremeJlts otJoadmiddot~tmiddot The SPST f ~ toigle switches are numbered andmiddot must be cloSed in nUD1erl~ordertodecrease

totlreslstance~creasmglOad The total ~cemiddot or the cOb~ected~rs ( may be COmputed f~theequation L

middot 1 1 1-1 ~=R1+Ri+lt8middotmiddotmiddot

The ConowingO equations may be used to detemUne the power disSipated from a measurement of load currentor voltage

L P=EI = = I~

p (ampp) = 8 xEpBPH (tor balanced ioad)

Where P=P~inWatb

E =yoltage inVolfB I = Currentin Amperes

f R =Resistance in Ohms L P(Stp) =middotmiddotTotalPower for Three-Phase

~H ==~ Voltage per Phase~r Load Bankf L bull IpH = Ourrent per Phase ofLoad Bank ampshy

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~ SERIES 100 OPmiddotERATmiddotING INSTRUCTIONS

MODEL RLC-100RESmiddotISTANCE-REACTANmiddotCE LOAD

The RLCl00 ismiddota variable resistance and--reactance- (either ~ductive or capaci- tive) uDit that ~y be used _to apply a singl~plmse or a three-phase load The remstive load (w~ can be ~ for both middotACcd DC) is controDed by siz SPST toggle switches e8ch of which puts 2000 ohlnaof resistance in paraDelmiddot lor all three phases simultaneouslybullThe resistive-load is therefore always balanced The total resistance in eacli ph8se equals 2000- ohms divided by the Dumber of switches closed For example with two sWitehesclosedtbe total resistance-is 1000 ohms rith aUsiZ closed 8888 ohms Each or the three reactance loads (used forAC o~) separateVfused at 1 amp is controlled by a knob that varltlSthe degreeopound lead andmiddot l8g A clockwise rotationof the middotknob applies leadiIlg pOwer factor (cashypaCitive)loid while a counterc1~ rotation appIiesa lagging power factor (inductive) load There is DO lpadapplied whenthe-knob is in mid position

The 8-4-5 right triangle graph below may bemiddot~ to approximate a O~8 power factor leading or lagging

1 Appfi a resistiVe load 2 Readthe in-phase current h from -the ammeter 8 From the lR value on tlie horizontal base of the graph travel vertically to the

point where it intersects the 08 PF (total amps) line 4 Frommiddotthis point travel horizontally to the reactive current wlueIz 5 Adjust the ~ve load until the Ix ammeter reads this value of reactive cur

rent

6 To obtain a ~ced load in a three-phaseconfigaratioD repeat Step -5 for the other two~

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RESISTIVE AMPERES

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-13 47 Henry

middotINDUCTANCEDIAL POSITIONmiddot (~middotQLJNT~RCmiddotLOCKWJSE)

-12 51 Henry

middot11 ~ 57 Henry

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-16 37 Henry~

-7 97 HefJry

middot6 middot1tt~H~nry

-18 33 HenlY

DIAL POSITION CAPACITANCE (CLOCKWISE)

0 69 llF

1 1~57 J1F

2 316 J1F

3 501Jlf

middot4 640J1F

5 80~J1f

6 985 j1f 7 1160middotpF

8 1360J1Fmiddot

9 1609middotJ1F

10 18~JtF

11 2007~middotF

12 2170 fLF

13 2513 )iFmiddot

14 2860J1F

15 3090 pFmiddot

15 3269JlF

17 3539 JlFmiddot (

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MODJL ACVA-10()ACMETERINGPANEL L GENERAL The HAMPDEN Model ACVA-1OO consistsmiddotol two AC ammetem and one AC voltshy

meterA11 or the meters are dioaeprot8cted against overloads as high 1Ui 1000f

The ~ltmeter islicctt8 within 8 w1UIemiddotthe ammeters are accurate wi~hin ~ plusmn29D ormiddotfWl sCale dellection The middotme~rshave the following ranges

r I AC Voltm~teI Oto l00~OO V~ts ~ AC Amme~ OtlJQ5f2f4l8-Amps

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OPERATION

AC AMMETERS

L 1 Connect the ammeter in series so that the middotentire AC current to be measured passes

I through the ~~ter The test lead from the dark blue middotbindingpostis connected to one

side or the Dne and the test lead trom the Qrange bin~ post to the other ~ L

2 ~e choice or measuring range is iet with the range switch Fourmiddotranges are avaiiable O 05 0204 an~ 0 - 8 amperes

8 Set the rangemiddotswitch on the 8 ampere range Detore turning on the power

a) When ~ to measure motor current put a jumper lead between the tWo binding poststo protect the movement from the large inrushcurrent at start This jumper is

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removed after the motor has started

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MANUFACTURERSmiddotOF rpUIPMCNT F()R EDUCATION AND INDUSTRY

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MODELACWM-1 GO WATIMETER PANEL

GENERAL The1iAMPDEN Model ACWMmiddotI00 consists artwo Iilulti-rangewattmeters and

I tbe~tchesh-lh~r operation Eacli has ~e follOwing ranges l

)to 1~30016~1200W

(150300Volts 2148 Amps)

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OPERATION Measure wattage bymiddotconn8cling a wattmetervoltmeter andmiddot~ete~8sshownin Figtt81 The ~-MPstttOn mustO be~middotconn~middotin series- with the ioad and-the

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VQTS con mUstmiddotbeqo~n~middotiJ1 prU9l1elwith the load protected against overloads by diodes

The Otlrrent~Coils are

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-FIGURE 1 WATTMETER CONNECnONS 14IJ -- -

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Balanced Load

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Each wa~eter has tWomiddot Voltage mtinp (150 and- 800V)~ Rotating the range -switclirounterciOCkwise from OFF engages the 150 volt range Rotatmg the _range SWitch clOQkwise from O~ engages the 800 volt range Utilize the Voltmeters readiDg to determine the approprlllte-range

Each wattmetermiddot has three currentmiddot ratings (2 4 and SA) Rotating the range swiJchfrom middotO~engages the Samprarigefbst ~ the wattm~termiddotreadsbelow ~r 8Cll18 and the ammeter indicates that the 4 amp rating will not be ~e9 ~ectmiddotthe 4 ainp range-middot If the mttnie~ again reads below balt scaie and the ammeterindicates that the 2 amp rating will no~ bemiddot exceeded the 2 amp range may bese1ectedI

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L FIGURE 2 WATTMETER CONNECTIONS 3fi1

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L middot The totalwatbge is the sum of the two meter readings PI and P2

f When pow~ in a ~ced load is m~ured in this ~er the indication or the 1

two ~eterS VlLL~PT be the same except at 1D1ity power factor middot -shy

When the power factor of the circuit is less than 509b the pointer of meter PI will reverse~ To obtain total wattage in this case reverse the current connections to metet Pl -then subtract the rea~g ormeter PI from that of meter P2

The twO-wattmeter~method cannot be used with as-phase 4-wire load Three wattmeters are ~ in that case

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POWER FACTOR i f ~

Given a balallCed load the~oWer tacentor middoteanbe -d~emiined from the two wattmeter mth6cL - ~

L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

J be calca1ated -from-the -following_equation0

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tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

wherep2 repr~ts th~~ier~thetwoWl1ttiJ1~ re~ingswhentbepower faeto~l~other thaD uPity

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BiDet th~powertaetb~ 8q1alsthcosme ofthephaseangletP~powerfactor may also be I deterJninedfromtheratioo~thetwo wittmeterreadings middotmiddotThegraph b~ow shows the1 I

I relationship between themiddotpowerfacior andth~ratio~f P1lP2 ~

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MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

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L OPERATIONI

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DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

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agt If the currePtis~ter than 5 amperes the needlewDI move off-scale TuRN OFF POVER IMliEDIATELY AJf exception to this may be on motor starling Momenshytary current inrushbullmay exceed 5 ampe~ but theneedleiminediately drops back to normal

b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

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1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

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a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

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MODEL-1723 rACHoME~R

DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

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MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

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OPEBATIONTouSe the powermiddotpanelt (lISt tum ON ~MAIN AC circuit breaker~i This will m~tethemain AC pnot Hght and 9nergize the four-pin ~Pyen~i supplying fix~208120VAOtliree-phase poWer Th~ other 1ixed~d~Je sulpHes may

l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

cuit ~~ (both ~ ~ncl BEc) A clockwise lOtation of the vol~cpntro1 -- ~ ~eause ~~~~the voltage a~ble at the appropriate 1~Ptashy

L I tNOTE ~~ ~~ltage oo~~lbob fOr the 0-208120V three-phase sUpply is ~ted at the ~nd or the

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IfanY~r~es11PplifSri-e~vefloaded one or more circuit breakers may trip middotOFF Al- ir ways turnthemiddotVariable suppllesto zero and remove the C8usaopound the oyerload before resetshy

JL ting the circuitmiddotl~~em

A pindiilg ~ groun4 oenn~oDis proVided at each end or the panel fOrgrounding the rotating macbin~

ENGINEERING CORPORATION -----MANUFACTURERS OF eciuaPMENT R)R EOUCAT1ON AND INDUSTRV bull

PO Box 563 East ~ow IdA 91028 (413) S25-S9ff1 bull nx 95-5426 bull Fax (41~) S2S-4141

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Page 8: [1 Table D. - UTKweb.eecs.utk.edu/~jsl/ECE325/ECE325-LabManual.pdfLab #2 Load-Speed Characteristic of a DC Motor . Objective . The objective of . this . lab is to . detennine the load-speed

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l L Lab 2 Load-Speed Characteristic of a DC Motor

Objective

The objective of this lab is to detennine the load-speed characteristics ofa DC motor

rmiddot Part AL

1 The DC machine will be ron as a genetator at a constant speed- The armatureresistance (Ra) will 1 I bull -- becalculate4 to assist in plotting tbeSieed VSla annature current

l t Pre-Lab middotL

smiddot 1

I Calculate a synchronous motors rotor speed (f=60 HzN=120fp) for a machirie with four poles and fora machine with six poles

2 Calculate the value afbaclc emf ltEa) fora DC motor (Ka~ = 6944e-2 VRPM) with arotor

speedof 1800RPM with a rotor speed of 1000 ~ and with a rotor speed of0 RPM 3 Draw a circuit dia~ ofaDC machine connected as a separately excited generator (show

~ -resistance indilctance and voltage the field inductance and resistance~d the variableresistive load) Show how to conneCt a voltmeter to measure armature voltage and bow to connectmiddota ammeter tome8sure annafure current

Laboratory Exercise

L Laboiatmy Setup

1 ConneCt the DC machine as a se~tely excited generator and connect the synchronous mac1rlneas a motor as shown in Lab 2 Part A Wning Diagram

2 Mechnica11y couple the two machineS so that the synchronous motor drives the DC generator 3 Set the synchronous-machine to IND STARTt

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4 TurD on the main AC power S Tmn the syncllronoDs machine field voltage (0-150 VDC) to position 3 6 Set the synchronousmachine to $YNCH RUN 7 Make sure the rotor speed is 1800RPM

Laboratoty Measurements

( 1 Measure open circuit armature voltage (back emf) and field cmrent as the DC machina field

1 voltage (D-l25VDc) is increased Use field current (If) increments of about 005 A and vary shy

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If up to 05A 2 Set tbeDCmachin~s fieldvoltage to a value ~atbrings the open circuit annature voltage to

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12SVL 3 Measure the anna~ current (Ialand ~ature vol~ge(Vagt as theresistive load is increased I bull

i Do not exceed an annatme current of2At Record eoughpofuts to ~phtheVa VS In L charaCteristicbull

1 I Ca1culatio~s~amp Questions1shy

1 Plot back emf versus fie1ilCUlTent L

2 Plot ~~ture tenninalvoltagc versus armature current

3 Calculai~ta va1~eforannatureresistance (Ra) from the slope ofVa vsIamiddot - ---~~ ~l 4 ~atPtPose does the synchronous machine serve fot Part A~

Part B

The DC ma9bine will be ron as a DC shunt moftr~ The sPee4vs armaturecurrentchara~tic

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will be mcas1Jtcd andplotted and the effectof anna~ reacnon will be evaluated

Pre~Lab

L 1 DraJithecircuitdiagram ofa DCmiddotshunt motor

1 1 2 Defihe annatitte reaction shy

3 CalcnlateKa~forVt=Ea=125V at 1800 RPMmiddot

4~ Develop a re1ationshipmiddotof speed as a funeti()11 ofannl-~ ~nt Use the values of Vt andL KaW from above and assume that annature reaction is negligible I L

Laboratory Exercise

2 I -- LabomtotySetup t

I i 1 Set the ()lS0 VDCknob to position 3

2 Set the synchronous machine to SYNCH RUNt l

3 Co~ecttbeDCma~hine asa shunt motor and the middotsynchronousmiddotm~hineas a 3-phase ACL

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generator as shownin Lab 2 PartBWiring DIagram 4 Connect the variable three~phase resistive load to the oU1put tenninals of the synchronous)

L machine The resistance of the load will be increased to place a mechanical load on the DC motor (drawing more current through the DC motors armature)

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Laboratory Measurements

1~ U~ouple the two machines 2 Turn on main power 3 Set the PC armature voltage (by using the ~12S VDCknob) to 12SV 4 Adjust~eDC machine field rheostat to obtain a no-load speed of 1800 RPM

s Measure annature voltage and ~ature current at no-load

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6 TUrn theO-l2S VDe knob down to stop the motor (leave the field rheostat as it was set) 7bull Couple the motor andthe gener8m 8 Tmn th~ 0-125 VDe knob up to increas~ armature voltageto 12SyenL 9 Incre~~ the load onthe synchronous gCIieratorbull For each 3-phase load switch record the

annature current and the speedJ L

Calculations 1

L 1 Calculate the power consumed by the DC machine at noload(no-16ad losses)

I 2 Plot speed versus ~ature cocrent (a) from claculatedvalnesusing Rafrom Part A andIa = 0 L- tolS A (b) using experimentaldatagathered in Part B CoIPpare the two plots

3 H themiddotvaIueof Kaclgt decreas~s withhigb~annature current how is the speed effected~

4 How could one explain the ttiffercncesbetween dle experimental and theoretical plots Shouldannature reaction be neglected Use figures andor m~strations to support your answer

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Lab 2P~~t A Wiring Diagram

PQVIER PANa

0 Omiddot 0 0 0 12fNNJ t2OVAC MAlHAC PAt bull ot5OVDC bull SEC PAl bull o12SVDO bull SEC 12OVAC~~W

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Lab 2 Part B Wiring Diagram

POWER PANEL I bull

1 i 0 0 Omiddot 0 0lshy

120VAC 0-24011fOVAo-so-tW t2OVAC MAINAC PAl bull OmiddotSOVDC bull SEC PAL o-125VDC bull SEC tOVAC

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A B C N o~ N A B C N + +L g 0000 00 0000 It

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calculate the parameters ofan inductionmotorequivalent circUi~ and to compare the calculated values with measured values L

Pre-La))

(

1 What are the two typeS ofrotOis used mAC inductlonmotorsl t 2 Give theequation for SYDchrono~ speed What is the synhronous speed for a four pole AC ~

L ~d-qctiltgtn~bine (standacent ~efrecFJe~) 3 Define slip for an induction motor If thesynchronous speed is 1800 RPM and the slip (s) is

L 001 what is the rotor speed Ifs == 011 -

l bull 4 Draw a power flow diagram for an AC induction ~otor

5~ middotmiddotDrawatorque VS~ sp~d curve for ail ACinduction motor What is the torqu~ prodnced at synchronous speed (Ns)

6 DescnDemiddot~ no-load test and the blocked rotor ~t for an induction motor Whatis the value ofslip for a Blocked ~otor Test

7 Draw the lEEE-recommended equivalent circuit~ shyL

Calculations C l

l Given the follow~g test results

fLj No-load test Line voltage= 210 V

Linecuxrent iO77 A

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Iiiputpower = 52 W L

I - Blocked-rotor test Line voltage ~ 60V shy tinecu1rent 17 AJ - shy

Input power == 100 W

Also given stator r~tance (Rl) =53 Wphase DL synchronous speed (COsyn) =1885 radlsec

L (R~ember that you are worldngwith a 3-phase machine)

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1 Calculate the parameters of the lEEE-~~ended equivalent circuit 2 Calculate the induction motornopad rotational Io~ 3 CalculateI2t I1t PF Fin Ptiutt Eff and ToutfQrslip v~ues fa11ging from 0 to O~l (with

L step siZe 001) (Pont =Pmech - Prot and Tout = Tmechgt

3 ~lot outputtorque versus speed ~ 4 Plot power factof versusoutput powe~ 5 piot AC)ine current versus outpu~power

i 6 it Plot efficiency versus outPut pow~ shy

LabormiddotatorY Exercise LabgratolY Setup

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L 1 S~tUP middottheOC machine as a sep~te1y excited generator with variableresistance load bank andthe wo~drotot motor as an indu~on motor to drivemiddotthe DC generator (Connect the

indu~Otimotorstatotwindirigsfu a delta confi8uration) This is shown in the Lab 3 Wiring Diagrallt ~

3 CQ~tXtawattmetet to measure power into the itlductionmotor 4 CoDnectDC meters tomeasure DC generator ~nniDalvoltage and armature current 5 Connect AC ~terStOmeasweline to neutral voltage and line current

j 1

- Laboratoxy Me~ments

J 1 Mechanically conple the induction motor to the DC generator-

2 Bring the 3-phase AC voltage to 120V (line to n~tral) ~ I

i 3 Whenmiddotthe induction mot-or is running (around 1783 RPM) bring the nmiddotc machine terminal ~ ~ ~oi~ uP to 125 V middot

4 ~~centfu~ucti~n m~tofv~ues offOtor sp~ed regt vol~age1inetoneutral (Vt(l-n) line CUlTent t shy bull bull bull bullbullbull ~ bull t bull bull bull bulll

(lOt andp~~rofone_p~e (WI)bull middot 5 RCCC~d DC generator values values ofvoltage at terminal (VVand armature current (Ia)

6 First take a set ofmeasurements with all the resistance switches off 1 middotTheD continuerecordingmiddotas theJoad is increased up to ACmiddotllne current of 15 A Do not

exceedthis currentlimitl1

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CalctilationS

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~ 1 Calculate values for Pin Pout PF Eff~ atidTout

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l PF= WI (Vt(l-n) II)

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L Tout= Pout6012nN

f 2 Plot ()utput torgue versus speed ( L- 3 Plotp01l-er fa~torve~u~middot outp~tpoer

4 Plot AC line current v~~outputpower f 5~i Plot~fficl~ncy verSusoutputPQwer L 6 Con1p~ethe ~resu1ts wi~thecalcu1ated results 7 CommeIJton the wisdom ofbuying an indu~on motor having a signijican~ygreaterporse i L power ra~g than iSrequiiedmiddot to dothejob~

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Lab 3 Wiring Diagram

PONERPANa

0 0 0 0 0 120VAC ~laquoNAD4O-4W 12OVoAC MAINC PAl bull o-1atNDC - SEC PAL bull 00121VDC bull SEC 12OVAC

0 ~ 0 0 GJ EJ []] 0 GJ ~ 0 ~ 0

A 8 C N + 0000 00 Q

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La) 4 Synchronous Motor

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L Objective

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L The objective of ~ lab is tomiddotexamine the terminal characteristics ofa synchronous motor under - I08(fand no-load conditions

i L

Pre-Lab

i - L 1 Whatisan important feature ofsynchronous motors

~ Dra~ariequivalentcircuit modetfor a synclnypousmotor ShowEf Xs Ra Iat~Vt If and

the fiel~winding 3 Descripe the open-eircuit test ~t is measured What is varied Sketch the circuit 4 Descn1le the short-circuit test Mat is measured What is varied Sketch the circuit 5 Sketehatt open~ircuit ch8rac~riStic aDd a short-circuit charac~eriStic Show Ia (rated) Vt

(rated) a11da modified airgaplineL

Laboratory Exercise f Part A L

The open-circuit and short-circuit tests will be performed to determine values f~r Xs and ~using

LI

the synchronous machine as a generator

Procedure

1 ~ Connect the DC machine as a selfexcited shunt generator 88 shown in Lab 4 Part A ~g

diagram

2 ~ Couple the DC machine to the syn6~nous machine f 3 Set the 0-125 VDCbob to zeromiddot L

4 Set the 0-150 VDC kn~b to zero 5 Set the synchron~us mac~e to INn START e

6 Bring the DC~cbine terminal voltage up to 125 Vt and adjust the field rheostat to obtain a speed of 1800~M

7 Set the sYnchronous machine to SYNCH RUN 8 Perform the open-circuit test With the synchronous machines terminals open measure the

( voltage across the windings (V00) as field current (If) in increased Increase the field current t - by increasing the DC voltage across the field winding Vary If from 0 to lA in increments of

l 9 OlA Set If to zero

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10 Perform the short-circuit test Short the ph~ windings of the synchronous machine and put

i i an ammeter in series with the shorted windings Measuremiddotthe average windingcurrent (Isc) as L

If in increased V~If from 0 to lA in increments ofOlA ( t

i L- Calculations

1 4~middotVt = Voc =120middotVcaJ~ulatcentmiddotXs and K(Xs =Voc IIsc andK= Voc I If)

2 P16tIIalvs If~(IIal =1Vt--KIf) I Xsi ) t L Part Bmiddot L The annatuIecurrentwill be measured agfield current is varied under loadmiddot and no loadconc1itions

L-

-

1 Connectfh~sySte~ as sbownin the Lab 4 Part Bwiring diagram but do not couple the syn~~riq~-~tiinetothe DC machine~

2 Senhe~chronousmac~to lND STARr 3 Thin tbe6-1S0vnpknobto position cO5~

4 TumODmailtpoiVer

( S S~ the synclnpnbusmachine tq ~YNCH RUN The motor speed should be 1800 RPM L 6 MeasureIa andItas If is varief1 up to lA

Load Procedure shy

1 TUm offmain power 2 Mechanically couplethe synchronous machine to the DC ~hine

3 Set~~ first nine switches of the resistance load to ON ) 4 Setthe-~chrononsmachine to lND START L

5 Turno~middot-m~~wer

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1~ 6 Tuni the~o-lS0VDCknob to position 20bull

~ 7 Settheo-l25VDCknobtoposition pound9 tbull

8 Set the synchronous machine to SYNCH RUN The motor speed should be at 1800 RPM 9bull Measure Ia and Ifas Ifis varied up to lA

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Calculations L

1 Plot Ia V8 If for load and no load conditions and compare with c~cu1ated graph

2 Is there a best~fieldcurrent at which the synchronous machine should be operated

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Lab 4 ~art A Wiring Diagram

POWER PANEL

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SERI~S100 OPERATINGINSTRUCTIONS amp bull ~

MODEL WRM-100-3A WOUND-ROTOR MOTOR

GENERAL The WRY-100-SA is a three-phase four pole wound-rotor motorconsisting of a stator winding and a rotor winding withldip rings and brushes A three-pole

~ circuit breaker ~ also provided in the termm81 box The nominal ratings of the motor ari~ circuit breaker are listed below r

1 J l-- SPECIFICATIONS MOTORL

WmdingTypeshy Wound Btafor amp Rotor Horsepower shy 13HP Speed shy 175QRPM Voltage bull 20SV bull Sf Amiddot or 860V-s+Y

I Frequency- 60Hz L- Rating Continuous

Full Load Current bull 17 Amps

CIRCUIT BREAKER

Type of Operator bull Rocker Switch L No of PoleS bull Three

Overload )pe bull Thermal Trip Rating shy 2DAmpS Reset Method - middotOW- to Reset

r I - shy OPERATION To operatethe ~-l00-SAas an induction motor make the connections shown

in Figure L Rotate the Wound Rotor Speed Control ~b to the maximum resisshytance fttn~ counterclockwise direction With all th~ ~ce in the rotor cir middotcai~ the motor-willdevelop maxirilum starting torque and minimum ~g curshy

rent Pwih up the rocker switch on the circuit breaker~ startmiddottqemotorbull The motor will accelerateup to speed The rheostat providesthe mSansofv~g theL motors lQieedtorque characteristicS The effect of the rlieostat increUes with increasing load onthe motorr ~

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A 6 C AC INPUT SI1PPLY

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WRSe-100

FIGURE 1

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GENERAL

SPECIFICATIONS

middotMODEL SMmiddot100middot3ASYNCHRONOUS MACHINE

ThemiddotSMmiddotI00-8A is a three-phase four-pole machine consisting of a wyedel~ stashytor andmiddot 8 quadrature rotor having a DC field winding and a damper winding A three-pole circUit breaker and a IND START-BYNC RUN switch are provided in the terminal OOx- RatingS fonow

SM-100-3A MOTOR ampALTERNATOR

Speed - 1800 RPM Voltagemiddot Max Ambient Temp Insulation bull Rating bull

CIRCUIT BREAKER

Type of~tor shyNo ofPoles bull Overload Type bull Trip Rating bull Reset Methoa shy

ALTERNATOR

Power-Load Current bull Fielti Excitation shy

MOTOR

HorSepowershyCurrent bull Frequencyshy

208120V-B+-4W 4~ (1047) ClassmiddotB Continuous

Rocker Three Thermal L7amps

middot middotOFF to Reset

250 watts 07 amp (nominal) Separate L6 amps

18 HP 17 Amps 60Hz

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OPERATION Th~ proper connections tor operation of th~ SMl00-SA ~ a ~clttonous (SYNCHRONOUS motor are shown in Figure middot1 With ~ ~tebin the SYNC RUNposiliou MOTOR) ~ze the vari~ble DC supply and adjusttbe~tput voltage from zero up to

th~ value which eauses 1 amp to flow through the rotor ~turn the switch to the lNDSTART PO$ition middotand Start the motor by toggling~becircuit breaker to

the ONposltion WJten the motor reaches DO lQad 1ij)eeC1 move the switch to the SYNC RUN posItion The rotor will then sYnchronize with the nn~ and fJ1e motor wiD be ti1mrlng at exactly 1800 RPvL Used to demonstrate the Wrious ~tics of synclirOnous motors

+VARIABlpound DC

_sUPPLY

STATOR ROTOR middotL1middot 11 A~~-eJ-----CJ

middot AC u l 12

~~YB~T middotJ3~T3

ct-O--ltr

VARIABLE + DC SUPPLY

FIGURE 1 SM-10o-3A AS A SYNCHRONOUS MoioR

ABC AC SUPPLY INPUT

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OPERATION The proper ampinn~~ fo~ operation or the SM-l00-SA as an alternator are ALTERNATOR) shown in Fi8Ure ~ With tliese connections made and the switch in the SYNCL RUNposition drive the alternator at 1800 RPM With a sUitable prime mover

Energize the DC Voltage supply and increase thesupplys output to bicrease f themiddotslternatorts output voltage to the desired value Toggle the circuit breaker ~L ~ tlie ON pPSition to connect the alternators output to the load Used to

middotdemonstrate the characteristics of a polyphase alternator of the stationary arshyr mature typebull ~t may also be used asthe loading device when testing the varishyI oUsmotom- shy

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OUTPUT

rmiddot~ FIGURE 2 L SM-10o-3A AS AN ALTERNATOR

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SERJES100 OPERATING INStRUCTIONS

oMOoDEL DMmiddot1 DDA DC MACHINE

GENERAL The DY-10OA is amiddot two-pole compound-wound machine ~g of a shunt field a series field and an armature winding A shunt fie1dmiddotr~t and two-pole startel switM are also provided in the-terminal box ~tings follow

SPECIFICAnONS

MACHINE

Shunt Field Ex SepO5A 125V Insulation CJass F middotMax Ambient Temp 40 ~C (104 OF) Rating Continl101iS Speed 1800 RPM nominal Shunt Series Compound wo~dJl1Otcr

125V SOAt 18 HP Shunt Series Compound wound generator

RHEOSTAT

Resistance Power Current middot Taper Fuse Minimum Resistance Position

STARTER

Type of Operator No of Poles Overload Type Trip Rating middot Reset Method

125V 2A 250KW

800~Ohms

100 Watts O575middotAmps Lin ear 1A SJo Blo

Toggle Two Thermal 4lAmps Push Toggle down

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L FUNCTION The primDrJ function or the DC motor is to demonstrate the characteristics of

shunt series ancl compOund motors~ It IIl8Y also bemiddotutiHzed as a prime mover when testiJlg a gel1eraloror alternator Using the DCmiddotmotor tor this PurPose has the advantage th~tbe speed may be held constant bymiddot8djusting tJie shunt field rheostat after each load step is applied

L OPERATION The -proper connections for operation as a ClUDulative compound DC motor are

(DC MOTOR) shOWDin Fipre i Withmiddot theseoonndionS made the motor may be started by moving the starter switch toggle up to the ON position It is good praetioe to stad the motor with the shunt field rh~ in its minimum resistance fully COW position to provide m8amum starting torque andmiDitnum starting Curshy

L rent The motor may then be adjusted ~ the desired speed byadjUBtingtbe field rheostat or varying the line voltage

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1 125VDO SUPPLY

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FUNCTION The DC generator is p~arily utili2ed to demonstrate the characteristics of shunt series ~dCOinpound gen~tors It is~ alsOusedastlle loading device

when testing the vari~us motors

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OPERATION The~CODnections tor operation as a cmnulative C()~po1l1ld nCgenshyeratorareshown in Figure 2 With these connectio~middotmiddotDltldeJ drive theJDCmiddotGENERATOR gen~-atapproxhnately1800RPM with a suitable p~e moVer With thefie1qrheostatJnits Jll8Ximum resistance fullyc1ocm~ position enshyergiZe thel15V DC field supply Rotate the field rheostatinthecltunter

shy clockwisedir$ctian middottoinCreasemiddot the output voltage middotto the desiredmiddot value Switch Oti~middotthemiddotoverloadmiddot switChmiddotto connect the generators output to the

resistance load

+ 1151 DC - 230 W

OUTPUT

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MODEL MGmiddotBmiddot100DG BEDPLATE f

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The MG Bedplateconsists of a heayy s~ baBe n10~~middotmiddoton vibration pads The

I - GENERAL

function otthe bedplate is toe~le the quickmounting ~dcoup1mg of the two individ~ macbiDoes to form a completemiddotmiddotm~ior-Pnerator setpwothreaded hpldshy

~ down)1Ocks ~d winged screwsareprovidecltoseeurethe F t claJnps which hold tbeinBcbinetsmounting boards A couplingguard and two shaft ~gwrrds are p~

r vided to p~ttheSiudenttrom accidet1talJito~gor~~gwires0l1 rotatshy- shy ing)arts The guardsmiddotare quickly mounted bY insertirig retamer CUpS in~T~9tsin

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The procedure for mou~ting and ioupling the machines to the base is as fon~

L 1 A~just each wing screw 021- ~e two screw clamp hold~ownmiddot ~locks to the top of its threaded stud - 0

i 2 Place each ~chine so that the rear of the base is reSting agairistmiddotthemiddot thd rear clamp on thei L- MGbasemiddot

8 Slide machines iJiboara until ~elrcouplingl1anPs are centered oVer cen~ slots 4 bert rub coupnngmiddotsleevemiddot~toone of the mac1dnes co~pling 1IimgM~ L

5 Slidere~jning machines coupling flange into-the other side of couplbig sleeve 6 Checktobe Sure thatmiddot~e couplhig guard will cOver coupling when insertedmiddotinto one ot thel pails areenter slotsmiddot 7 plaCe front clamp tor each of machines against the front or the two macbiD5t bases

(- s 8 F~pr tighten ~~uts 9it middotthe two screw clamp hold-down biocks Lmiddot 9 Mount coUplini aDd shaft guards by locating appropriate retainer clips in slotS so that coushy

pling is ~der co~Ung guard and ~ sh~ is covered by a ~haft guatdL

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MODIL1-10oaA TRANSFClRfJIER OEMONSTRATOR

GENEijAL The TlOO-8A~~ts of three Single-phase bansformers wit~ m11Jtiple primary and secondary taps terminated atpinreceptacl~on the front of the unit Each of the three ~rOrinersmay beused independen1q Or the threemay~interconmiddot

f nected mseries~1npQmneJ or inmiddot many poJyph8seCbnfigurations

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EacbtraDslormer is~~middot af)vol~amperesat 60 Hertz ~ has two primary~d

two secoDdaqwindiIlBL Each ofthe priD1817 windiD~1tas800 turns of Nobull 24 gauge-wire and JSmiddotm~-120volta 05 amperes Onewhidingis tapped at 82 volts toprovide~~middotS~tttllp~(866$)middot~fthemiddot twomiddotwiDd1np~ 68ri~ Each or thesecondshylQ7middotwindh1pmiddot1uIs100t11rns of No 21 gauge wire and israted 60 volts 10 ampere One winding Js tappbd atmiddotlaquo volts to p~vide a Scott tapor the two windings in series Shownbelow are the voltage ratings orthe various taps for each of the three traDspoundormers

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t o 32V 120V 0 120V lI__

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t bull MODEL middotRLmiddot100AmiddotRESISTANC~LOAD J J- shy~ GENERAL The RL-IOOAfs variable ftsistance unit used to applya resistivel0a4middottogenera

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tors or altemators One unit may be used in single-phase applications ora bank L of tlmae units may be combhled intQ Wye or De1taCOnt1IJDlt1~DS tor three phase

applicmioDS TiieRL-lOOA mttoduces resistieload~ ~sequentild steps r designed to prod11CB approximateiy equal ipcremeJlts otJoadmiddot~tmiddot The SPST f ~ toigle switches are numbered andmiddot must be cloSed in nUD1erl~ordertodecrease

totlreslstance~creasmglOad The total ~cemiddot or the cOb~ected~rs ( may be COmputed f~theequation L

middot 1 1 1-1 ~=R1+Ri+lt8middotmiddotmiddot

The ConowingO equations may be used to detemUne the power disSipated from a measurement of load currentor voltage

L P=EI = = I~

p (ampp) = 8 xEpBPH (tor balanced ioad)

Where P=P~inWatb

E =yoltage inVolfB I = Currentin Amperes

f R =Resistance in Ohms L P(Stp) =middotmiddotTotalPower for Three-Phase

~H ==~ Voltage per Phase~r Load Bankf L bull IpH = Ourrent per Phase ofLoad Bank ampshy

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~ SERIES 100 OPmiddotERATmiddotING INSTRUCTIONS

MODEL RLC-100RESmiddotISTANCE-REACTANmiddotCE LOAD

The RLCl00 ismiddota variable resistance and--reactance- (either ~ductive or capaci- tive) uDit that ~y be used _to apply a singl~plmse or a three-phase load The remstive load (w~ can be ~ for both middotACcd DC) is controDed by siz SPST toggle switches e8ch of which puts 2000 ohlnaof resistance in paraDelmiddot lor all three phases simultaneouslybullThe resistive-load is therefore always balanced The total resistance in eacli ph8se equals 2000- ohms divided by the Dumber of switches closed For example with two sWitehesclosedtbe total resistance-is 1000 ohms rith aUsiZ closed 8888 ohms Each or the three reactance loads (used forAC o~) separateVfused at 1 amp is controlled by a knob that varltlSthe degreeopound lead andmiddot l8g A clockwise rotationof the middotknob applies leadiIlg pOwer factor (cashypaCitive)loid while a counterc1~ rotation appIiesa lagging power factor (inductive) load There is DO lpadapplied whenthe-knob is in mid position

The 8-4-5 right triangle graph below may bemiddot~ to approximate a O~8 power factor leading or lagging

1 Appfi a resistiVe load 2 Readthe in-phase current h from -the ammeter 8 From the lR value on tlie horizontal base of the graph travel vertically to the

point where it intersects the 08 PF (total amps) line 4 Frommiddotthis point travel horizontally to the reactive current wlueIz 5 Adjust the ~ve load until the Ix ammeter reads this value of reactive cur

rent

6 To obtain a ~ced load in a three-phaseconfigaratioD repeat Step -5 for the other two~

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11 2007~middotF

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13 2513 )iFmiddot

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SERIES 100OPERATING INSTAUCTIONS L

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MODJL ACVA-10()ACMETERINGPANEL L GENERAL The HAMPDEN Model ACVA-1OO consistsmiddotol two AC ammetem and one AC voltshy

meterA11 or the meters are dioaeprot8cted against overloads as high 1Ui 1000f

The ~ltmeter islicctt8 within 8 w1UIemiddotthe ammeters are accurate wi~hin ~ plusmn29D ormiddotfWl sCale dellection The middotme~rshave the following ranges

r I AC Voltm~teI Oto l00~OO V~ts ~ AC Amme~ OtlJQ5f2f4l8-Amps

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OPERATION

AC AMMETERS

L 1 Connect the ammeter in series so that the middotentire AC current to be measured passes

I through the ~~ter The test lead from the dark blue middotbindingpostis connected to one

side or the Dne and the test lead trom the Qrange bin~ post to the other ~ L

2 ~e choice or measuring range is iet with the range switch Fourmiddotranges are avaiiable O 05 0204 an~ 0 - 8 amperes

8 Set the rangemiddotswitch on the 8 ampere range Detore turning on the power

a) When ~ to measure motor current put a jumper lead between the tWo binding poststo protect the movement from the large inrushcurrent at start This jumper is

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removed after the motor has started

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MODELACWM-1 GO WATIMETER PANEL

GENERAL The1iAMPDEN Model ACWMmiddotI00 consists artwo Iilulti-rangewattmeters and

I tbe~tchesh-lh~r operation Eacli has ~e follOwing ranges l

)to 1~30016~1200W

(150300Volts 2148 Amps)

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OPERATION Measure wattage bymiddotconn8cling a wattmetervoltmeter andmiddot~ete~8sshownin Figtt81 The ~-MPstttOn mustO be~middotconn~middotin series- with the ioad and-the

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VQTS con mUstmiddotbeqo~n~middotiJ1 prU9l1elwith the load protected against overloads by diodes

The Otlrrent~Coils are

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-FIGURE 1 WATTMETER CONNECnONS 14IJ -- -

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Each wa~eter has tWomiddot Voltage mtinp (150 and- 800V)~ Rotating the range -switclirounterciOCkwise from OFF engages the 150 volt range Rotatmg the _range SWitch clOQkwise from O~ engages the 800 volt range Utilize the Voltmeters readiDg to determine the approprlllte-range

Each wattmetermiddot has three currentmiddot ratings (2 4 and SA) Rotating the range swiJchfrom middotO~engages the Samprarigefbst ~ the wattm~termiddotreadsbelow ~r 8Cll18 and the ammeter indicates that the 4 amp rating will not be ~e9 ~ectmiddotthe 4 ainp range-middot If the mttnie~ again reads below balt scaie and the ammeterindicates that the 2 amp rating will no~ bemiddot exceeded the 2 amp range may bese1ectedI

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L FIGURE 2 WATTMETER CONNECTIONS 3fi1

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L middot The totalwatbge is the sum of the two meter readings PI and P2

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two ~eterS VlLL~PT be the same except at 1D1ity power factor middot -shy

When the power factor of the circuit is less than 509b the pointer of meter PI will reverse~ To obtain total wattage in this case reverse the current connections to metet Pl -then subtract the rea~g ormeter PI from that of meter P2

The twO-wattmeter~method cannot be used with as-phase 4-wire load Three wattmeters are ~ in that case

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POWER FACTOR i f ~

Given a balallCed load the~oWer tacentor middoteanbe -d~emiined from the two wattmeter mth6cL - ~

L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

J be calca1ated -from-the -following_equation0

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tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

wherep2 repr~ts th~~ier~thetwoWl1ttiJ1~ re~ingswhentbepower faeto~l~other thaD uPity

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BiDet th~powertaetb~ 8q1alsthcosme ofthephaseangletP~powerfactor may also be I deterJninedfromtheratioo~thetwo wittmeterreadings middotmiddotThegraph b~ow shows the1 I

I relationship between themiddotpowerfacior andth~ratio~f P1lP2 ~

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MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

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L OPERATIONI

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DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

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agt If the currePtis~ter than 5 amperes the needlewDI move off-scale TuRN OFF POVER IMliEDIATELY AJf exception to this may be on motor starling Momenshytary current inrushbullmay exceed 5 ampe~ but theneedleiminediately drops back to normal

b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

L

1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

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a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

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MODEL-1723 rACHoME~R

DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

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MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

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OPEBATIONTouSe the powermiddotpanelt (lISt tum ON ~MAIN AC circuit breaker~i This will m~tethemain AC pnot Hght and 9nergize the four-pin ~Pyen~i supplying fix~208120VAOtliree-phase poWer Th~ other 1ixed~d~Je sulpHes may

l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

cuit ~~ (both ~ ~ncl BEc) A clockwise lOtation of the vol~cpntro1 -- ~ ~eause ~~~~the voltage a~ble at the appropriate 1~Ptashy

L I tNOTE ~~ ~~ltage oo~~lbob fOr the 0-208120V three-phase sUpply is ~ted at the ~nd or the

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IfanY~r~es11PplifSri-e~vefloaded one or more circuit breakers may trip middotOFF Al- ir ways turnthemiddotVariable suppllesto zero and remove the C8usaopound the oyerload before resetshy

JL ting the circuitmiddotl~~em

A pindiilg ~ groun4 oenn~oDis proVided at each end or the panel fOrgrounding the rotating macbin~

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Page 9: [1 Table D. - UTKweb.eecs.utk.edu/~jsl/ECE325/ECE325-LabManual.pdfLab #2 Load-Speed Characteristic of a DC Motor . Objective . The objective of . this . lab is to . detennine the load-speed

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If up to 05A 2 Set tbeDCmachin~s fieldvoltage to a value ~atbrings the open circuit annature voltage to

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12SVL 3 Measure the anna~ current (Ialand ~ature vol~ge(Vagt as theresistive load is increased I bull

i Do not exceed an annatme current of2At Record eoughpofuts to ~phtheVa VS In L charaCteristicbull

1 I Ca1culatio~s~amp Questions1shy

1 Plot back emf versus fie1ilCUlTent L

2 Plot ~~ture tenninalvoltagc versus armature current

3 Calculai~ta va1~eforannatureresistance (Ra) from the slope ofVa vsIamiddot - ---~~ ~l 4 ~atPtPose does the synchronous machine serve fot Part A~

Part B

The DC ma9bine will be ron as a DC shunt moftr~ The sPee4vs armaturecurrentchara~tic

lt

will be mcas1Jtcd andplotted and the effectof anna~ reacnon will be evaluated

Pre~Lab

L 1 DraJithecircuitdiagram ofa DCmiddotshunt motor

1 1 2 Defihe annatitte reaction shy

3 CalcnlateKa~forVt=Ea=125V at 1800 RPMmiddot

4~ Develop a re1ationshipmiddotof speed as a funeti()11 ofannl-~ ~nt Use the values of Vt andL KaW from above and assume that annature reaction is negligible I L

Laboratory Exercise

2 I -- LabomtotySetup t

I i 1 Set the ()lS0 VDCknob to position 3

2 Set the synchronous machine to SYNCH RUNt l

3 Co~ecttbeDCma~hine asa shunt motor and the middotsynchronousmiddotm~hineas a 3-phase ACL

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generator as shownin Lab 2 PartBWiring DIagram 4 Connect the variable three~phase resistive load to the oU1put tenninals of the synchronous)

L machine The resistance of the load will be increased to place a mechanical load on the DC motor (drawing more current through the DC motors armature)

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6

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Laboratory Measurements

1~ U~ouple the two machines 2 Turn on main power 3 Set the PC armature voltage (by using the ~12S VDCknob) to 12SV 4 Adjust~eDC machine field rheostat to obtain a no-load speed of 1800 RPM

s Measure annature voltage and ~ature current at no-load

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6 TUrn theO-l2S VDe knob down to stop the motor (leave the field rheostat as it was set) 7bull Couple the motor andthe gener8m 8 Tmn th~ 0-125 VDe knob up to increas~ armature voltageto 12SyenL 9 Incre~~ the load onthe synchronous gCIieratorbull For each 3-phase load switch record the

annature current and the speedJ L

Calculations 1

L 1 Calculate the power consumed by the DC machine at noload(no-16ad losses)

I 2 Plot speed versus ~ature cocrent (a) from claculatedvalnesusing Rafrom Part A andIa = 0 L- tolS A (b) using experimentaldatagathered in Part B CoIPpare the two plots

3 H themiddotvaIueof Kaclgt decreas~s withhigb~annature current how is the speed effected~

4 How could one explain the ttiffercncesbetween dle experimental and theoretical plots Shouldannature reaction be neglected Use figures andor m~strations to support your answer

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Lab 2P~~t A Wiring Diagram

PQVIER PANa

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Lab 2 Part B Wiring Diagram

POWER PANEL I bull

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L Objectivemiddotmiddot

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calculate the parameters ofan inductionmotorequivalent circUi~ and to compare the calculated values with measured values L

Pre-La))

(

1 What are the two typeS ofrotOis used mAC inductlonmotorsl t 2 Give theequation for SYDchrono~ speed What is the synhronous speed for a four pole AC ~

L ~d-qctiltgtn~bine (standacent ~efrecFJe~) 3 Define slip for an induction motor If thesynchronous speed is 1800 RPM and the slip (s) is

L 001 what is the rotor speed Ifs == 011 -

l bull 4 Draw a power flow diagram for an AC induction ~otor

5~ middotmiddotDrawatorque VS~ sp~d curve for ail ACinduction motor What is the torqu~ prodnced at synchronous speed (Ns)

6 DescnDemiddot~ no-load test and the blocked rotor ~t for an induction motor Whatis the value ofslip for a Blocked ~otor Test

7 Draw the lEEE-recommended equivalent circuit~ shyL

Calculations C l

l Given the follow~g test results

fLj No-load test Line voltage= 210 V

Linecuxrent iO77 A

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Iiiputpower = 52 W L

I - Blocked-rotor test Line voltage ~ 60V shy tinecu1rent 17 AJ - shy

Input power == 100 W

Also given stator r~tance (Rl) =53 Wphase DL synchronous speed (COsyn) =1885 radlsec

L (R~ember that you are worldngwith a 3-phase machine)

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1 Calculate the parameters of the lEEE-~~ended equivalent circuit 2 Calculate the induction motornopad rotational Io~ 3 CalculateI2t I1t PF Fin Ptiutt Eff and ToutfQrslip v~ues fa11ging from 0 to O~l (with

L step siZe 001) (Pont =Pmech - Prot and Tout = Tmechgt

3 ~lot outputtorque versus speed ~ 4 Plot power factof versusoutput powe~ 5 piot AC)ine current versus outpu~power

i 6 it Plot efficiency versus outPut pow~ shy

LabormiddotatorY Exercise LabgratolY Setup

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L 1 S~tUP middottheOC machine as a sep~te1y excited generator with variableresistance load bank andthe wo~drotot motor as an indu~on motor to drivemiddotthe DC generator (Connect the

indu~Otimotorstatotwindirigsfu a delta confi8uration) This is shown in the Lab 3 Wiring Diagrallt ~

3 CQ~tXtawattmetet to measure power into the itlductionmotor 4 CoDnectDC meters tomeasure DC generator ~nniDalvoltage and armature current 5 Connect AC ~terStOmeasweline to neutral voltage and line current

j 1

- Laboratoxy Me~ments

J 1 Mechanically conple the induction motor to the DC generator-

2 Bring the 3-phase AC voltage to 120V (line to n~tral) ~ I

i 3 Whenmiddotthe induction mot-or is running (around 1783 RPM) bring the nmiddotc machine terminal ~ ~ ~oi~ uP to 125 V middot

4 ~~centfu~ucti~n m~tofv~ues offOtor sp~ed regt vol~age1inetoneutral (Vt(l-n) line CUlTent t shy bull bull bull bullbullbull ~ bull t bull bull bull bulll

(lOt andp~~rofone_p~e (WI)bull middot 5 RCCC~d DC generator values values ofvoltage at terminal (VVand armature current (Ia)

6 First take a set ofmeasurements with all the resistance switches off 1 middotTheD continuerecordingmiddotas theJoad is increased up to ACmiddotllne current of 15 A Do not

exceedthis currentlimitl1

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CalctilationS

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~ 1 Calculate values for Pin Pout PF Eff~ atidTout

t Pin=3~Wl ~ shyd

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L PoUt~V~ogtc)jIa +Ia~Ra ~Pr~~

l PF= WI (Vt(l-n) II)

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L Tout= Pout6012nN

f 2 Plot ()utput torgue versus speed ( L- 3 Plotp01l-er fa~torve~u~middot outp~tpoer

4 Plot AC line current v~~outputpower f 5~i Plot~fficl~ncy verSusoutputPQwer L 6 Con1p~ethe ~resu1ts wi~thecalcu1ated results 7 CommeIJton the wisdom ofbuying an indu~on motor having a signijican~ygreaterporse i L power ra~g than iSrequiiedmiddot to dothejob~

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Lab 3 Wiring Diagram

PONERPANa

0 0 0 0 0 120VAC ~laquoNAD4O-4W 12OVoAC MAINC PAl bull o-1atNDC - SEC PAL bull 00121VDC bull SEC 12OVAC

0 ~ 0 0 GJ EJ []] 0 GJ ~ 0 ~ 0

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La) 4 Synchronous Motor

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L Objective

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L The objective of ~ lab is tomiddotexamine the terminal characteristics ofa synchronous motor under - I08(fand no-load conditions

i L

Pre-Lab

i - L 1 Whatisan important feature ofsynchronous motors

~ Dra~ariequivalentcircuit modetfor a synclnypousmotor ShowEf Xs Ra Iat~Vt If and

the fiel~winding 3 Descripe the open-eircuit test ~t is measured What is varied Sketch the circuit 4 Descn1le the short-circuit test Mat is measured What is varied Sketch the circuit 5 Sketehatt open~ircuit ch8rac~riStic aDd a short-circuit charac~eriStic Show Ia (rated) Vt

(rated) a11da modified airgaplineL

Laboratory Exercise f Part A L

The open-circuit and short-circuit tests will be performed to determine values f~r Xs and ~using

LI

the synchronous machine as a generator

Procedure

1 ~ Connect the DC machine as a selfexcited shunt generator 88 shown in Lab 4 Part A ~g

diagram

2 ~ Couple the DC machine to the syn6~nous machine f 3 Set the 0-125 VDCbob to zeromiddot L

4 Set the 0-150 VDC kn~b to zero 5 Set the synchron~us mac~e to INn START e

6 Bring the DC~cbine terminal voltage up to 125 Vt and adjust the field rheostat to obtain a speed of 1800~M

7 Set the sYnchronous machine to SYNCH RUN 8 Perform the open-circuit test With the synchronous machines terminals open measure the

( voltage across the windings (V00) as field current (If) in increased Increase the field current t - by increasing the DC voltage across the field winding Vary If from 0 to lA in increments of

l 9 OlA Set If to zero

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10 Perform the short-circuit test Short the ph~ windings of the synchronous machine and put

i i an ammeter in series with the shorted windings Measuremiddotthe average windingcurrent (Isc) as L

If in increased V~If from 0 to lA in increments ofOlA ( t

i L- Calculations

1 4~middotVt = Voc =120middotVcaJ~ulatcentmiddotXs and K(Xs =Voc IIsc andK= Voc I If)

2 P16tIIalvs If~(IIal =1Vt--KIf) I Xsi ) t L Part Bmiddot L The annatuIecurrentwill be measured agfield current is varied under loadmiddot and no loadconc1itions

L-

-

1 Connectfh~sySte~ as sbownin the Lab 4 Part Bwiring diagram but do not couple the syn~~riq~-~tiinetothe DC machine~

2 Senhe~chronousmac~to lND STARr 3 Thin tbe6-1S0vnpknobto position cO5~

4 TumODmailtpoiVer

( S S~ the synclnpnbusmachine tq ~YNCH RUN The motor speed should be 1800 RPM L 6 MeasureIa andItas If is varief1 up to lA

Load Procedure shy

1 TUm offmain power 2 Mechanically couplethe synchronous machine to the DC ~hine

3 Set~~ first nine switches of the resistance load to ON ) 4 Setthe-~chrononsmachine to lND START L

5 Turno~middot-m~~wer

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1~ 6 Tuni the~o-lS0VDCknob to position 20bull

~ 7 Settheo-l25VDCknobtoposition pound9 tbull

8 Set the synchronous machine to SYNCH RUN The motor speed should be at 1800 RPM 9bull Measure Ia and Ifas Ifis varied up to lA

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Calculations L

1 Plot Ia V8 If for load and no load conditions and compare with c~cu1ated graph

2 Is there a best~fieldcurrent at which the synchronous machine should be operated

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Lab 4 ~art A Wiring Diagram

POWER PANEL

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SERI~S100 OPERATINGINSTRUCTIONS amp bull ~

MODEL WRM-100-3A WOUND-ROTOR MOTOR

GENERAL The WRY-100-SA is a three-phase four pole wound-rotor motorconsisting of a stator winding and a rotor winding withldip rings and brushes A three-pole

~ circuit breaker ~ also provided in the termm81 box The nominal ratings of the motor ari~ circuit breaker are listed below r

1 J l-- SPECIFICATIONS MOTORL

WmdingTypeshy Wound Btafor amp Rotor Horsepower shy 13HP Speed shy 175QRPM Voltage bull 20SV bull Sf Amiddot or 860V-s+Y

I Frequency- 60Hz L- Rating Continuous

Full Load Current bull 17 Amps

CIRCUIT BREAKER

Type of Operator bull Rocker Switch L No of PoleS bull Three

Overload )pe bull Thermal Trip Rating shy 2DAmpS Reset Method - middotOW- to Reset

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in Figure L Rotate the Wound Rotor Speed Control ~b to the maximum resisshytance fttn~ counterclockwise direction With all th~ ~ce in the rotor cir middotcai~ the motor-willdevelop maxirilum starting torque and minimum ~g curshy

rent Pwih up the rocker switch on the circuit breaker~ startmiddottqemotorbull The motor will accelerateup to speed The rheostat providesthe mSansofv~g theL motors lQieedtorque characteristicS The effect of the rlieostat increUes with increasing load onthe motorr ~

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A 6 C AC INPUT SI1PPLY

M1 middotM2shy

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Q M3

WRSe-100

FIGURE 1

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GENERAL

SPECIFICATIONS

middotMODEL SMmiddot100middot3ASYNCHRONOUS MACHINE

ThemiddotSMmiddotI00-8A is a three-phase four-pole machine consisting of a wyedel~ stashytor andmiddot 8 quadrature rotor having a DC field winding and a damper winding A three-pole circUit breaker and a IND START-BYNC RUN switch are provided in the terminal OOx- RatingS fonow

SM-100-3A MOTOR ampALTERNATOR

Speed - 1800 RPM Voltagemiddot Max Ambient Temp Insulation bull Rating bull

CIRCUIT BREAKER

Type of~tor shyNo ofPoles bull Overload Type bull Trip Rating bull Reset Methoa shy

ALTERNATOR

Power-Load Current bull Fielti Excitation shy

MOTOR

HorSepowershyCurrent bull Frequencyshy

208120V-B+-4W 4~ (1047) ClassmiddotB Continuous

Rocker Three Thermal L7amps

middot middotOFF to Reset

250 watts 07 amp (nominal) Separate L6 amps

18 HP 17 Amps 60Hz

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OPERATION Th~ proper connections tor operation of th~ SMl00-SA ~ a ~clttonous (SYNCHRONOUS motor are shown in Figure middot1 With ~ ~tebin the SYNC RUNposiliou MOTOR) ~ze the vari~ble DC supply and adjusttbe~tput voltage from zero up to

th~ value which eauses 1 amp to flow through the rotor ~turn the switch to the lNDSTART PO$ition middotand Start the motor by toggling~becircuit breaker to

the ONposltion WJten the motor reaches DO lQad 1ij)eeC1 move the switch to the SYNC RUN posItion The rotor will then sYnchronize with the nn~ and fJ1e motor wiD be ti1mrlng at exactly 1800 RPvL Used to demonstrate the Wrious ~tics of synclirOnous motors

+VARIABlpound DC

_sUPPLY

STATOR ROTOR middotL1middot 11 A~~-eJ-----CJ

middot AC u l 12

~~YB~T middotJ3~T3

ct-O--ltr

VARIABLE + DC SUPPLY

FIGURE 1 SM-10o-3A AS A SYNCHRONOUS MoioR

ABC AC SUPPLY INPUT

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OPERATION The proper ampinn~~ fo~ operation or the SM-l00-SA as an alternator are ALTERNATOR) shown in Fi8Ure ~ With tliese connections made and the switch in the SYNCL RUNposition drive the alternator at 1800 RPM With a sUitable prime mover

Energize the DC Voltage supply and increase thesupplys output to bicrease f themiddotslternatorts output voltage to the desired value Toggle the circuit breaker ~L ~ tlie ON pPSition to connect the alternators output to the load Used to

middotdemonstrate the characteristics of a polyphase alternator of the stationary arshyr mature typebull ~t may also be used asthe loading device when testing the varishyI oUsmotom- shy

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OUTPUT

rmiddot~ FIGURE 2 L SM-10o-3A AS AN ALTERNATOR

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SERJES100 OPERATING INStRUCTIONS

oMOoDEL DMmiddot1 DDA DC MACHINE

GENERAL The DY-10OA is amiddot two-pole compound-wound machine ~g of a shunt field a series field and an armature winding A shunt fie1dmiddotr~t and two-pole startel switM are also provided in the-terminal box ~tings follow

SPECIFICAnONS

MACHINE

Shunt Field Ex SepO5A 125V Insulation CJass F middotMax Ambient Temp 40 ~C (104 OF) Rating Continl101iS Speed 1800 RPM nominal Shunt Series Compound wo~dJl1Otcr

125V SOAt 18 HP Shunt Series Compound wound generator

RHEOSTAT

Resistance Power Current middot Taper Fuse Minimum Resistance Position

STARTER

Type of Operator No of Poles Overload Type Trip Rating middot Reset Method

125V 2A 250KW

800~Ohms

100 Watts O575middotAmps Lin ear 1A SJo Blo

Toggle Two Thermal 4lAmps Push Toggle down

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L FUNCTION The primDrJ function or the DC motor is to demonstrate the characteristics of

shunt series ancl compOund motors~ It IIl8Y also bemiddotutiHzed as a prime mover when testiJlg a gel1eraloror alternator Using the DCmiddotmotor tor this PurPose has the advantage th~tbe speed may be held constant bymiddot8djusting tJie shunt field rheostat after each load step is applied

L OPERATION The -proper connections for operation as a ClUDulative compound DC motor are

(DC MOTOR) shOWDin Fipre i Withmiddot theseoonndionS made the motor may be started by moving the starter switch toggle up to the ON position It is good praetioe to stad the motor with the shunt field rh~ in its minimum resistance fully COW position to provide m8amum starting torque andmiDitnum starting Curshy

L rent The motor may then be adjusted ~ the desired speed byadjUBtingtbe field rheostat or varying the line voltage

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1 125VDO SUPPLY

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FUNCTION The DC generator is p~arily utili2ed to demonstrate the characteristics of shunt series ~dCOinpound gen~tors It is~ alsOusedastlle loading device

when testing the vari~us motors

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OPERATION The~CODnections tor operation as a cmnulative C()~po1l1ld nCgenshyeratorareshown in Figure 2 With these connectio~middotmiddotDltldeJ drive theJDCmiddotGENERATOR gen~-atapproxhnately1800RPM with a suitable p~e moVer With thefie1qrheostatJnits Jll8Ximum resistance fullyc1ocm~ position enshyergiZe thel15V DC field supply Rotate the field rheostatinthecltunter

shy clockwisedir$ctian middottoinCreasemiddot the output voltage middotto the desiredmiddot value Switch Oti~middotthemiddotoverloadmiddot switChmiddotto connect the generators output to the

resistance load

+ 1151 DC - 230 W

OUTPUT

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MODEL MGmiddotBmiddot100DG BEDPLATE f

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The MG Bedplateconsists of a heayy s~ baBe n10~~middotmiddoton vibration pads The

I - GENERAL

function otthe bedplate is toe~le the quickmounting ~dcoup1mg of the two individ~ macbiDoes to form a completemiddotmiddotm~ior-Pnerator setpwothreaded hpldshy

~ down)1Ocks ~d winged screwsareprovidecltoseeurethe F t claJnps which hold tbeinBcbinetsmounting boards A couplingguard and two shaft ~gwrrds are p~

r vided to p~ttheSiudenttrom accidet1talJito~gor~~gwires0l1 rotatshy- shy ing)arts The guardsmiddotare quickly mounted bY insertirig retamer CUpS in~T~9tsin

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The procedure for mou~ting and ioupling the machines to the base is as fon~

L 1 A~just each wing screw 021- ~e two screw clamp hold~ownmiddot ~locks to the top of its threaded stud - 0

i 2 Place each ~chine so that the rear of the base is reSting agairistmiddotthemiddot thd rear clamp on thei L- MGbasemiddot

8 Slide machines iJiboara until ~elrcouplingl1anPs are centered oVer cen~ slots 4 bert rub coupnngmiddotsleevemiddot~toone of the mac1dnes co~pling 1IimgM~ L

5 Slidere~jning machines coupling flange into-the other side of couplbig sleeve 6 Checktobe Sure thatmiddot~e couplhig guard will cOver coupling when insertedmiddotinto one ot thel pails areenter slotsmiddot 7 plaCe front clamp tor each of machines against the front or the two macbiD5t bases

(- s 8 F~pr tighten ~~uts 9it middotthe two screw clamp hold-down biocks Lmiddot 9 Mount coUplini aDd shaft guards by locating appropriate retainer clips in slotS so that coushy

pling is ~der co~Ung guard and ~ sh~ is covered by a ~haft guatdL

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MODIL1-10oaA TRANSFClRfJIER OEMONSTRATOR

GENEijAL The TlOO-8A~~ts of three Single-phase bansformers wit~ m11Jtiple primary and secondary taps terminated atpinreceptacl~on the front of the unit Each of the three ~rOrinersmay beused independen1q Or the threemay~interconmiddot

f nected mseries~1npQmneJ or inmiddot many poJyph8seCbnfigurations

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EacbtraDslormer is~~middot af)vol~amperesat 60 Hertz ~ has two primary~d

two secoDdaqwindiIlBL Each ofthe priD1817 windiD~1tas800 turns of Nobull 24 gauge-wire and JSmiddotm~-120volta 05 amperes Onewhidingis tapped at 82 volts toprovide~~middotS~tttllp~(866$)middot~fthemiddot twomiddotwiDd1np~ 68ri~ Each or thesecondshylQ7middotwindh1pmiddot1uIs100t11rns of No 21 gauge wire and israted 60 volts 10 ampere One winding Js tappbd atmiddotlaquo volts to p~vide a Scott tapor the two windings in series Shownbelow are the voltage ratings orthe various taps for each of the three traDspoundormers

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t o 32V 120V 0 120V lI__

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X1 X2 X3 X4 X5 X8 X7

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middotSEmiddotRIES 100OPERATING INSTRUCTIONS

t bull MODEL middotRLmiddot100AmiddotRESISTANC~LOAD J J- shy~ GENERAL The RL-IOOAfs variable ftsistance unit used to applya resistivel0a4middottogenera

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tors or altemators One unit may be used in single-phase applications ora bank L of tlmae units may be combhled intQ Wye or De1taCOnt1IJDlt1~DS tor three phase

applicmioDS TiieRL-lOOA mttoduces resistieload~ ~sequentild steps r designed to prod11CB approximateiy equal ipcremeJlts otJoadmiddot~tmiddot The SPST f ~ toigle switches are numbered andmiddot must be cloSed in nUD1erl~ordertodecrease

totlreslstance~creasmglOad The total ~cemiddot or the cOb~ected~rs ( may be COmputed f~theequation L

middot 1 1 1-1 ~=R1+Ri+lt8middotmiddotmiddot

The ConowingO equations may be used to detemUne the power disSipated from a measurement of load currentor voltage

L P=EI = = I~

p (ampp) = 8 xEpBPH (tor balanced ioad)

Where P=P~inWatb

E =yoltage inVolfB I = Currentin Amperes

f R =Resistance in Ohms L P(Stp) =middotmiddotTotalPower for Three-Phase

~H ==~ Voltage per Phase~r Load Bankf L bull IpH = Ourrent per Phase ofLoad Bank ampshy

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3f1 SOURCE

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~ SERIES 100 OPmiddotERATmiddotING INSTRUCTIONS

MODEL RLC-100RESmiddotISTANCE-REACTANmiddotCE LOAD

The RLCl00 ismiddota variable resistance and--reactance- (either ~ductive or capaci- tive) uDit that ~y be used _to apply a singl~plmse or a three-phase load The remstive load (w~ can be ~ for both middotACcd DC) is controDed by siz SPST toggle switches e8ch of which puts 2000 ohlnaof resistance in paraDelmiddot lor all three phases simultaneouslybullThe resistive-load is therefore always balanced The total resistance in eacli ph8se equals 2000- ohms divided by the Dumber of switches closed For example with two sWitehesclosedtbe total resistance-is 1000 ohms rith aUsiZ closed 8888 ohms Each or the three reactance loads (used forAC o~) separateVfused at 1 amp is controlled by a knob that varltlSthe degreeopound lead andmiddot l8g A clockwise rotationof the middotknob applies leadiIlg pOwer factor (cashypaCitive)loid while a counterc1~ rotation appIiesa lagging power factor (inductive) load There is DO lpadapplied whenthe-knob is in mid position

The 8-4-5 right triangle graph below may bemiddot~ to approximate a O~8 power factor leading or lagging

1 Appfi a resistiVe load 2 Readthe in-phase current h from -the ammeter 8 From the lR value on tlie horizontal base of the graph travel vertically to the

point where it intersects the 08 PF (total amps) line 4 Frommiddotthis point travel horizontally to the reactive current wlueIz 5 Adjust the ~ve load until the Ix ammeter reads this value of reactive cur

rent

6 To obtain a ~ced load in a three-phaseconfigaratioD repeat Step -5 for the other two~

--------1LI

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SERIES 100OPERATING INSTAUCTIONS L

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MODJL ACVA-10()ACMETERINGPANEL L GENERAL The HAMPDEN Model ACVA-1OO consistsmiddotol two AC ammetem and one AC voltshy

meterA11 or the meters are dioaeprot8cted against overloads as high 1Ui 1000f

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r I AC Voltm~teI Oto l00~OO V~ts ~ AC Amme~ OtlJQ5f2f4l8-Amps

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OPERATION

AC AMMETERS

L 1 Connect the ammeter in series so that the middotentire AC current to be measured passes

I through the ~~ter The test lead from the dark blue middotbindingpostis connected to one

side or the Dne and the test lead trom the Qrange bin~ post to the other ~ L

2 ~e choice or measuring range is iet with the range switch Fourmiddotranges are avaiiable O 05 0204 an~ 0 - 8 amperes

8 Set the rangemiddotswitch on the 8 ampere range Detore turning on the power

a) When ~ to measure motor current put a jumper lead between the tWo binding poststo protect the movement from the large inrushcurrent at start This jumper is

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removed after the motor has started

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MODELACWM-1 GO WATIMETER PANEL

GENERAL The1iAMPDEN Model ACWMmiddotI00 consists artwo Iilulti-rangewattmeters and

I tbe~tchesh-lh~r operation Eacli has ~e follOwing ranges l

)to 1~30016~1200W

(150300Volts 2148 Amps)

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OPERATION Measure wattage bymiddotconn8cling a wattmetervoltmeter andmiddot~ete~8sshownin Figtt81 The ~-MPstttOn mustO be~middotconn~middotin series- with the ioad and-the

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VQTS con mUstmiddotbeqo~n~middotiJ1 prU9l1elwith the load protected against overloads by diodes

The Otlrrent~Coils are

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-FIGURE 1 WATTMETER CONNECnONS 14IJ -- -

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Each wa~eter has tWomiddot Voltage mtinp (150 and- 800V)~ Rotating the range -switclirounterciOCkwise from OFF engages the 150 volt range Rotatmg the _range SWitch clOQkwise from O~ engages the 800 volt range Utilize the Voltmeters readiDg to determine the approprlllte-range

Each wattmetermiddot has three currentmiddot ratings (2 4 and SA) Rotating the range swiJchfrom middotO~engages the Samprarigefbst ~ the wattm~termiddotreadsbelow ~r 8Cll18 and the ammeter indicates that the 4 amp rating will not be ~e9 ~ectmiddotthe 4 ainp range-middot If the mttnie~ again reads below balt scaie and the ammeterindicates that the 2 amp rating will no~ bemiddot exceeded the 2 amp range may bese1ectedI

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L FIGURE 2 WATTMETER CONNECTIONS 3fi1

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L middot The totalwatbge is the sum of the two meter readings PI and P2

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two ~eterS VlLL~PT be the same except at 1D1ity power factor middot -shy

When the power factor of the circuit is less than 509b the pointer of meter PI will reverse~ To obtain total wattage in this case reverse the current connections to metet Pl -then subtract the rea~g ormeter PI from that of meter P2

The twO-wattmeter~method cannot be used with as-phase 4-wire load Three wattmeters are ~ in that case

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POWER FACTOR i f ~

Given a balallCed load the~oWer tacentor middoteanbe -d~emiined from the two wattmeter mth6cL - ~

L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

J be calca1ated -from-the -following_equation0

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tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

wherep2 repr~ts th~~ier~thetwoWl1ttiJ1~ re~ingswhentbepower faeto~l~other thaD uPity

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MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

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L OPERATIONI

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DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

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b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

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1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

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a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

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DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

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MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

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l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

cuit ~~ (both ~ ~ncl BEc) A clockwise lOtation of the vol~cpntro1 -- ~ ~eause ~~~~the voltage a~ble at the appropriate 1~Ptashy

L I tNOTE ~~ ~~ltage oo~~lbob fOr the 0-208120V three-phase sUpply is ~ted at the ~nd or the

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IfanY~r~es11PplifSri-e~vefloaded one or more circuit breakers may trip middotOFF Al- ir ways turnthemiddotVariable suppllesto zero and remove the C8usaopound the oyerload before resetshy

JL ting the circuitmiddotl~~em

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Page 10: [1 Table D. - UTKweb.eecs.utk.edu/~jsl/ECE325/ECE325-LabManual.pdfLab #2 Load-Speed Characteristic of a DC Motor . Objective . The objective of . this . lab is to . detennine the load-speed

I 1 L

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Laboratory Measurements

1~ U~ouple the two machines 2 Turn on main power 3 Set the PC armature voltage (by using the ~12S VDCknob) to 12SV 4 Adjust~eDC machine field rheostat to obtain a no-load speed of 1800 RPM

s Measure annature voltage and ~ature current at no-load

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6 TUrn theO-l2S VDe knob down to stop the motor (leave the field rheostat as it was set) 7bull Couple the motor andthe gener8m 8 Tmn th~ 0-125 VDe knob up to increas~ armature voltageto 12SyenL 9 Incre~~ the load onthe synchronous gCIieratorbull For each 3-phase load switch record the

annature current and the speedJ L

Calculations 1

L 1 Calculate the power consumed by the DC machine at noload(no-16ad losses)

I 2 Plot speed versus ~ature cocrent (a) from claculatedvalnesusing Rafrom Part A andIa = 0 L- tolS A (b) using experimentaldatagathered in Part B CoIPpare the two plots

3 H themiddotvaIueof Kaclgt decreas~s withhigb~annature current how is the speed effected~

4 How could one explain the ttiffercncesbetween dle experimental and theoretical plots Shouldannature reaction be neglected Use figures andor m~strations to support your answer

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Lab 2P~~t A Wiring Diagram

PQVIER PANa

0 Omiddot 0 0 0 12fNNJ t2OVAC MAlHAC PAt bull ot5OVDC bull SEC PAl bull o12SVDO bull SEC 12OVAC~~W

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Lab 2 Part B Wiring Diagram

POWER PANEL I bull

1 i 0 0 Omiddot 0 0lshy

120VAC 0-24011fOVAo-so-tW t2OVAC MAINAC PAl bull OmiddotSOVDC bull SEC PAL o-125VDC bull SEC tOVAC

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L Objectivemiddotmiddot

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calculate the parameters ofan inductionmotorequivalent circUi~ and to compare the calculated values with measured values L

Pre-La))

(

1 What are the two typeS ofrotOis used mAC inductlonmotorsl t 2 Give theequation for SYDchrono~ speed What is the synhronous speed for a four pole AC ~

L ~d-qctiltgtn~bine (standacent ~efrecFJe~) 3 Define slip for an induction motor If thesynchronous speed is 1800 RPM and the slip (s) is

L 001 what is the rotor speed Ifs == 011 -

l bull 4 Draw a power flow diagram for an AC induction ~otor

5~ middotmiddotDrawatorque VS~ sp~d curve for ail ACinduction motor What is the torqu~ prodnced at synchronous speed (Ns)

6 DescnDemiddot~ no-load test and the blocked rotor ~t for an induction motor Whatis the value ofslip for a Blocked ~otor Test

7 Draw the lEEE-recommended equivalent circuit~ shyL

Calculations C l

l Given the follow~g test results

fLj No-load test Line voltage= 210 V

Linecuxrent iO77 A

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Iiiputpower = 52 W L

I - Blocked-rotor test Line voltage ~ 60V shy tinecu1rent 17 AJ - shy

Input power == 100 W

Also given stator r~tance (Rl) =53 Wphase DL synchronous speed (COsyn) =1885 radlsec

L (R~ember that you are worldngwith a 3-phase machine)

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1 Calculate the parameters of the lEEE-~~ended equivalent circuit 2 Calculate the induction motornopad rotational Io~ 3 CalculateI2t I1t PF Fin Ptiutt Eff and ToutfQrslip v~ues fa11ging from 0 to O~l (with

L step siZe 001) (Pont =Pmech - Prot and Tout = Tmechgt

3 ~lot outputtorque versus speed ~ 4 Plot power factof versusoutput powe~ 5 piot AC)ine current versus outpu~power

i 6 it Plot efficiency versus outPut pow~ shy

LabormiddotatorY Exercise LabgratolY Setup

J

L 1 S~tUP middottheOC machine as a sep~te1y excited generator with variableresistance load bank andthe wo~drotot motor as an indu~on motor to drivemiddotthe DC generator (Connect the

indu~Otimotorstatotwindirigsfu a delta confi8uration) This is shown in the Lab 3 Wiring Diagrallt ~

3 CQ~tXtawattmetet to measure power into the itlductionmotor 4 CoDnectDC meters tomeasure DC generator ~nniDalvoltage and armature current 5 Connect AC ~terStOmeasweline to neutral voltage and line current

j 1

- Laboratoxy Me~ments

J 1 Mechanically conple the induction motor to the DC generator-

2 Bring the 3-phase AC voltage to 120V (line to n~tral) ~ I

i 3 Whenmiddotthe induction mot-or is running (around 1783 RPM) bring the nmiddotc machine terminal ~ ~ ~oi~ uP to 125 V middot

4 ~~centfu~ucti~n m~tofv~ues offOtor sp~ed regt vol~age1inetoneutral (Vt(l-n) line CUlTent t shy bull bull bull bullbullbull ~ bull t bull bull bull bulll

(lOt andp~~rofone_p~e (WI)bull middot 5 RCCC~d DC generator values values ofvoltage at terminal (VVand armature current (Ia)

6 First take a set ofmeasurements with all the resistance switches off 1 middotTheD continuerecordingmiddotas theJoad is increased up to ACmiddotllne current of 15 A Do not

exceedthis currentlimitl1

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CalctilationS

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~ 1 Calculate values for Pin Pout PF Eff~ atidTout

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L PoUt~V~ogtc)jIa +Ia~Ra ~Pr~~

l PF= WI (Vt(l-n) II)

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L Tout= Pout6012nN

f 2 Plot ()utput torgue versus speed ( L- 3 Plotp01l-er fa~torve~u~middot outp~tpoer

4 Plot AC line current v~~outputpower f 5~i Plot~fficl~ncy verSusoutputPQwer L 6 Con1p~ethe ~resu1ts wi~thecalcu1ated results 7 CommeIJton the wisdom ofbuying an indu~on motor having a signijican~ygreaterporse i L power ra~g than iSrequiiedmiddot to dothejob~

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Lab 3 Wiring Diagram

PONERPANa

0 0 0 0 0 120VAC ~laquoNAD4O-4W 12OVoAC MAINC PAl bull o-1atNDC - SEC PAL bull 00121VDC bull SEC 12OVAC

0 ~ 0 0 GJ EJ []] 0 GJ ~ 0 ~ 0

A 8 C N + 0000 00 Q

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La) 4 Synchronous Motor

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L Objective

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L The objective of ~ lab is tomiddotexamine the terminal characteristics ofa synchronous motor under - I08(fand no-load conditions

i L

Pre-Lab

i - L 1 Whatisan important feature ofsynchronous motors

~ Dra~ariequivalentcircuit modetfor a synclnypousmotor ShowEf Xs Ra Iat~Vt If and

the fiel~winding 3 Descripe the open-eircuit test ~t is measured What is varied Sketch the circuit 4 Descn1le the short-circuit test Mat is measured What is varied Sketch the circuit 5 Sketehatt open~ircuit ch8rac~riStic aDd a short-circuit charac~eriStic Show Ia (rated) Vt

(rated) a11da modified airgaplineL

Laboratory Exercise f Part A L

The open-circuit and short-circuit tests will be performed to determine values f~r Xs and ~using

LI

the synchronous machine as a generator

Procedure

1 ~ Connect the DC machine as a selfexcited shunt generator 88 shown in Lab 4 Part A ~g

diagram

2 ~ Couple the DC machine to the syn6~nous machine f 3 Set the 0-125 VDCbob to zeromiddot L

4 Set the 0-150 VDC kn~b to zero 5 Set the synchron~us mac~e to INn START e

6 Bring the DC~cbine terminal voltage up to 125 Vt and adjust the field rheostat to obtain a speed of 1800~M

7 Set the sYnchronous machine to SYNCH RUN 8 Perform the open-circuit test With the synchronous machines terminals open measure the

( voltage across the windings (V00) as field current (If) in increased Increase the field current t - by increasing the DC voltage across the field winding Vary If from 0 to lA in increments of

l 9 OlA Set If to zero

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10 Perform the short-circuit test Short the ph~ windings of the synchronous machine and put

i i an ammeter in series with the shorted windings Measuremiddotthe average windingcurrent (Isc) as L

If in increased V~If from 0 to lA in increments ofOlA ( t

i L- Calculations

1 4~middotVt = Voc =120middotVcaJ~ulatcentmiddotXs and K(Xs =Voc IIsc andK= Voc I If)

2 P16tIIalvs If~(IIal =1Vt--KIf) I Xsi ) t L Part Bmiddot L The annatuIecurrentwill be measured agfield current is varied under loadmiddot and no loadconc1itions

L-

-

1 Connectfh~sySte~ as sbownin the Lab 4 Part Bwiring diagram but do not couple the syn~~riq~-~tiinetothe DC machine~

2 Senhe~chronousmac~to lND STARr 3 Thin tbe6-1S0vnpknobto position cO5~

4 TumODmailtpoiVer

( S S~ the synclnpnbusmachine tq ~YNCH RUN The motor speed should be 1800 RPM L 6 MeasureIa andItas If is varief1 up to lA

Load Procedure shy

1 TUm offmain power 2 Mechanically couplethe synchronous machine to the DC ~hine

3 Set~~ first nine switches of the resistance load to ON ) 4 Setthe-~chrononsmachine to lND START L

5 Turno~middot-m~~wer

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1~ 6 Tuni the~o-lS0VDCknob to position 20bull

~ 7 Settheo-l25VDCknobtoposition pound9 tbull

8 Set the synchronous machine to SYNCH RUN The motor speed should be at 1800 RPM 9bull Measure Ia and Ifas Ifis varied up to lA

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Calculations L

1 Plot Ia V8 If for load and no load conditions and compare with c~cu1ated graph

2 Is there a best~fieldcurrent at which the synchronous machine should be operated

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Lab 4 ~art A Wiring Diagram

POWER PANEL

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SERI~S100 OPERATINGINSTRUCTIONS amp bull ~

MODEL WRM-100-3A WOUND-ROTOR MOTOR

GENERAL The WRY-100-SA is a three-phase four pole wound-rotor motorconsisting of a stator winding and a rotor winding withldip rings and brushes A three-pole

~ circuit breaker ~ also provided in the termm81 box The nominal ratings of the motor ari~ circuit breaker are listed below r

1 J l-- SPECIFICATIONS MOTORL

WmdingTypeshy Wound Btafor amp Rotor Horsepower shy 13HP Speed shy 175QRPM Voltage bull 20SV bull Sf Amiddot or 860V-s+Y

I Frequency- 60Hz L- Rating Continuous

Full Load Current bull 17 Amps

CIRCUIT BREAKER

Type of Operator bull Rocker Switch L No of PoleS bull Three

Overload )pe bull Thermal Trip Rating shy 2DAmpS Reset Method - middotOW- to Reset

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in Figure L Rotate the Wound Rotor Speed Control ~b to the maximum resisshytance fttn~ counterclockwise direction With all th~ ~ce in the rotor cir middotcai~ the motor-willdevelop maxirilum starting torque and minimum ~g curshy

rent Pwih up the rocker switch on the circuit breaker~ startmiddottqemotorbull The motor will accelerateup to speed The rheostat providesthe mSansofv~g theL motors lQieedtorque characteristicS The effect of the rlieostat increUes with increasing load onthe motorr ~

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A 6 C AC INPUT SI1PPLY

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WRSe-100

FIGURE 1

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GENERAL

SPECIFICATIONS

middotMODEL SMmiddot100middot3ASYNCHRONOUS MACHINE

ThemiddotSMmiddotI00-8A is a three-phase four-pole machine consisting of a wyedel~ stashytor andmiddot 8 quadrature rotor having a DC field winding and a damper winding A three-pole circUit breaker and a IND START-BYNC RUN switch are provided in the terminal OOx- RatingS fonow

SM-100-3A MOTOR ampALTERNATOR

Speed - 1800 RPM Voltagemiddot Max Ambient Temp Insulation bull Rating bull

CIRCUIT BREAKER

Type of~tor shyNo ofPoles bull Overload Type bull Trip Rating bull Reset Methoa shy

ALTERNATOR

Power-Load Current bull Fielti Excitation shy

MOTOR

HorSepowershyCurrent bull Frequencyshy

208120V-B+-4W 4~ (1047) ClassmiddotB Continuous

Rocker Three Thermal L7amps

middot middotOFF to Reset

250 watts 07 amp (nominal) Separate L6 amps

18 HP 17 Amps 60Hz

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OPERATION Th~ proper connections tor operation of th~ SMl00-SA ~ a ~clttonous (SYNCHRONOUS motor are shown in Figure middot1 With ~ ~tebin the SYNC RUNposiliou MOTOR) ~ze the vari~ble DC supply and adjusttbe~tput voltage from zero up to

th~ value which eauses 1 amp to flow through the rotor ~turn the switch to the lNDSTART PO$ition middotand Start the motor by toggling~becircuit breaker to

the ONposltion WJten the motor reaches DO lQad 1ij)eeC1 move the switch to the SYNC RUN posItion The rotor will then sYnchronize with the nn~ and fJ1e motor wiD be ti1mrlng at exactly 1800 RPvL Used to demonstrate the Wrious ~tics of synclirOnous motors

+VARIABlpound DC

_sUPPLY

STATOR ROTOR middotL1middot 11 A~~-eJ-----CJ

middot AC u l 12

~~YB~T middotJ3~T3

ct-O--ltr

VARIABLE + DC SUPPLY

FIGURE 1 SM-10o-3A AS A SYNCHRONOUS MoioR

ABC AC SUPPLY INPUT

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OPERATION The proper ampinn~~ fo~ operation or the SM-l00-SA as an alternator are ALTERNATOR) shown in Fi8Ure ~ With tliese connections made and the switch in the SYNCL RUNposition drive the alternator at 1800 RPM With a sUitable prime mover

Energize the DC Voltage supply and increase thesupplys output to bicrease f themiddotslternatorts output voltage to the desired value Toggle the circuit breaker ~L ~ tlie ON pPSition to connect the alternators output to the load Used to

middotdemonstrate the characteristics of a polyphase alternator of the stationary arshyr mature typebull ~t may also be used asthe loading device when testing the varishyI oUsmotom- shy

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OUTPUT

rmiddot~ FIGURE 2 L SM-10o-3A AS AN ALTERNATOR

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SERJES100 OPERATING INStRUCTIONS

oMOoDEL DMmiddot1 DDA DC MACHINE

GENERAL The DY-10OA is amiddot two-pole compound-wound machine ~g of a shunt field a series field and an armature winding A shunt fie1dmiddotr~t and two-pole startel switM are also provided in the-terminal box ~tings follow

SPECIFICAnONS

MACHINE

Shunt Field Ex SepO5A 125V Insulation CJass F middotMax Ambient Temp 40 ~C (104 OF) Rating Continl101iS Speed 1800 RPM nominal Shunt Series Compound wo~dJl1Otcr

125V SOAt 18 HP Shunt Series Compound wound generator

RHEOSTAT

Resistance Power Current middot Taper Fuse Minimum Resistance Position

STARTER

Type of Operator No of Poles Overload Type Trip Rating middot Reset Method

125V 2A 250KW

800~Ohms

100 Watts O575middotAmps Lin ear 1A SJo Blo

Toggle Two Thermal 4lAmps Push Toggle down

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L FUNCTION The primDrJ function or the DC motor is to demonstrate the characteristics of

shunt series ancl compOund motors~ It IIl8Y also bemiddotutiHzed as a prime mover when testiJlg a gel1eraloror alternator Using the DCmiddotmotor tor this PurPose has the advantage th~tbe speed may be held constant bymiddot8djusting tJie shunt field rheostat after each load step is applied

L OPERATION The -proper connections for operation as a ClUDulative compound DC motor are

(DC MOTOR) shOWDin Fipre i Withmiddot theseoonndionS made the motor may be started by moving the starter switch toggle up to the ON position It is good praetioe to stad the motor with the shunt field rh~ in its minimum resistance fully COW position to provide m8amum starting torque andmiDitnum starting Curshy

L rent The motor may then be adjusted ~ the desired speed byadjUBtingtbe field rheostat or varying the line voltage

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1 125VDO SUPPLY

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FUNCTION The DC generator is p~arily utili2ed to demonstrate the characteristics of shunt series ~dCOinpound gen~tors It is~ alsOusedastlle loading device

when testing the vari~us motors

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OPERATION The~CODnections tor operation as a cmnulative C()~po1l1ld nCgenshyeratorareshown in Figure 2 With these connectio~middotmiddotDltldeJ drive theJDCmiddotGENERATOR gen~-atapproxhnately1800RPM with a suitable p~e moVer With thefie1qrheostatJnits Jll8Ximum resistance fullyc1ocm~ position enshyergiZe thel15V DC field supply Rotate the field rheostatinthecltunter

shy clockwisedir$ctian middottoinCreasemiddot the output voltage middotto the desiredmiddot value Switch Oti~middotthemiddotoverloadmiddot switChmiddotto connect the generators output to the

resistance load

+ 1151 DC - 230 W

OUTPUT

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MODEL MGmiddotBmiddot100DG BEDPLATE f

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The MG Bedplateconsists of a heayy s~ baBe n10~~middotmiddoton vibration pads The

I - GENERAL

function otthe bedplate is toe~le the quickmounting ~dcoup1mg of the two individ~ macbiDoes to form a completemiddotmiddotm~ior-Pnerator setpwothreaded hpldshy

~ down)1Ocks ~d winged screwsareprovidecltoseeurethe F t claJnps which hold tbeinBcbinetsmounting boards A couplingguard and two shaft ~gwrrds are p~

r vided to p~ttheSiudenttrom accidet1talJito~gor~~gwires0l1 rotatshy- shy ing)arts The guardsmiddotare quickly mounted bY insertirig retamer CUpS in~T~9tsin

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The procedure for mou~ting and ioupling the machines to the base is as fon~

L 1 A~just each wing screw 021- ~e two screw clamp hold~ownmiddot ~locks to the top of its threaded stud - 0

i 2 Place each ~chine so that the rear of the base is reSting agairistmiddotthemiddot thd rear clamp on thei L- MGbasemiddot

8 Slide machines iJiboara until ~elrcouplingl1anPs are centered oVer cen~ slots 4 bert rub coupnngmiddotsleevemiddot~toone of the mac1dnes co~pling 1IimgM~ L

5 Slidere~jning machines coupling flange into-the other side of couplbig sleeve 6 Checktobe Sure thatmiddot~e couplhig guard will cOver coupling when insertedmiddotinto one ot thel pails areenter slotsmiddot 7 plaCe front clamp tor each of machines against the front or the two macbiD5t bases

(- s 8 F~pr tighten ~~uts 9it middotthe two screw clamp hold-down biocks Lmiddot 9 Mount coUplini aDd shaft guards by locating appropriate retainer clips in slotS so that coushy

pling is ~der co~Ung guard and ~ sh~ is covered by a ~haft guatdL

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SERIES 100 -OPERATINGINSTRUCTIONS

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MODIL1-10oaA TRANSFClRfJIER OEMONSTRATOR

GENEijAL The TlOO-8A~~ts of three Single-phase bansformers wit~ m11Jtiple primary and secondary taps terminated atpinreceptacl~on the front of the unit Each of the three ~rOrinersmay beused independen1q Or the threemay~interconmiddot

f nected mseries~1npQmneJ or inmiddot many poJyph8seCbnfigurations

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EacbtraDslormer is~~middot af)vol~amperesat 60 Hertz ~ has two primary~d

two secoDdaqwindiIlBL Each ofthe priD1817 windiD~1tas800 turns of Nobull 24 gauge-wire and JSmiddotm~-120volta 05 amperes Onewhidingis tapped at 82 volts toprovide~~middotS~tttllp~(866$)middot~fthemiddot twomiddotwiDd1np~ 68ri~ Each or thesecondshylQ7middotwindh1pmiddot1uIs100t11rns of No 21 gauge wire and israted 60 volts 10 ampere One winding Js tappbd atmiddotlaquo volts to p~vide a Scott tapor the two windings in series Shownbelow are the voltage ratings orthe various taps for each of the three traDspoundormers

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t o 32V 120V 0 120V lI__

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X1 X2 X3 X4 X5 X8 X7

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t bull MODEL middotRLmiddot100AmiddotRESISTANC~LOAD J J- shy~ GENERAL The RL-IOOAfs variable ftsistance unit used to applya resistivel0a4middottogenera

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tors or altemators One unit may be used in single-phase applications ora bank L of tlmae units may be combhled intQ Wye or De1taCOnt1IJDlt1~DS tor three phase

applicmioDS TiieRL-lOOA mttoduces resistieload~ ~sequentild steps r designed to prod11CB approximateiy equal ipcremeJlts otJoadmiddot~tmiddot The SPST f ~ toigle switches are numbered andmiddot must be cloSed in nUD1erl~ordertodecrease

totlreslstance~creasmglOad The total ~cemiddot or the cOb~ected~rs ( may be COmputed f~theequation L

middot 1 1 1-1 ~=R1+Ri+lt8middotmiddotmiddot

The ConowingO equations may be used to detemUne the power disSipated from a measurement of load currentor voltage

L P=EI = = I~

p (ampp) = 8 xEpBPH (tor balanced ioad)

Where P=P~inWatb

E =yoltage inVolfB I = Currentin Amperes

f R =Resistance in Ohms L P(Stp) =middotmiddotTotalPower for Three-Phase

~H ==~ Voltage per Phase~r Load Bankf L bull IpH = Ourrent per Phase ofLoad Bank ampshy

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~ SERIES 100 OPmiddotERATmiddotING INSTRUCTIONS

MODEL RLC-100RESmiddotISTANCE-REACTANmiddotCE LOAD

The RLCl00 ismiddota variable resistance and--reactance- (either ~ductive or capaci- tive) uDit that ~y be used _to apply a singl~plmse or a three-phase load The remstive load (w~ can be ~ for both middotACcd DC) is controDed by siz SPST toggle switches e8ch of which puts 2000 ohlnaof resistance in paraDelmiddot lor all three phases simultaneouslybullThe resistive-load is therefore always balanced The total resistance in eacli ph8se equals 2000- ohms divided by the Dumber of switches closed For example with two sWitehesclosedtbe total resistance-is 1000 ohms rith aUsiZ closed 8888 ohms Each or the three reactance loads (used forAC o~) separateVfused at 1 amp is controlled by a knob that varltlSthe degreeopound lead andmiddot l8g A clockwise rotationof the middotknob applies leadiIlg pOwer factor (cashypaCitive)loid while a counterc1~ rotation appIiesa lagging power factor (inductive) load There is DO lpadapplied whenthe-knob is in mid position

The 8-4-5 right triangle graph below may bemiddot~ to approximate a O~8 power factor leading or lagging

1 Appfi a resistiVe load 2 Readthe in-phase current h from -the ammeter 8 From the lR value on tlie horizontal base of the graph travel vertically to the

point where it intersects the 08 PF (total amps) line 4 Frommiddotthis point travel horizontally to the reactive current wlueIz 5 Adjust the ~ve load until the Ix ammeter reads this value of reactive cur

rent

6 To obtain a ~ced load in a three-phaseconfigaratioD repeat Step -5 for the other two~

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8 1360J1Fmiddot

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10 18~JtF

11 2007~middotF

12 2170 fLF

13 2513 )iFmiddot

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SERIES 100OPERATING INSTAUCTIONS L

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MODJL ACVA-10()ACMETERINGPANEL L GENERAL The HAMPDEN Model ACVA-1OO consistsmiddotol two AC ammetem and one AC voltshy

meterA11 or the meters are dioaeprot8cted against overloads as high 1Ui 1000f

The ~ltmeter islicctt8 within 8 w1UIemiddotthe ammeters are accurate wi~hin ~ plusmn29D ormiddotfWl sCale dellection The middotme~rshave the following ranges

r I AC Voltm~teI Oto l00~OO V~ts ~ AC Amme~ OtlJQ5f2f4l8-Amps

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OPERATION

AC AMMETERS

L 1 Connect the ammeter in series so that the middotentire AC current to be measured passes

I through the ~~ter The test lead from the dark blue middotbindingpostis connected to one

side or the Dne and the test lead trom the Qrange bin~ post to the other ~ L

2 ~e choice or measuring range is iet with the range switch Fourmiddotranges are avaiiable O 05 0204 an~ 0 - 8 amperes

8 Set the rangemiddotswitch on the 8 ampere range Detore turning on the power

a) When ~ to measure motor current put a jumper lead between the tWo binding poststo protect the movement from the large inrushcurrent at start This jumper is

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removed after the motor has started

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MODELACWM-1 GO WATIMETER PANEL

GENERAL The1iAMPDEN Model ACWMmiddotI00 consists artwo Iilulti-rangewattmeters and

I tbe~tchesh-lh~r operation Eacli has ~e follOwing ranges l

)to 1~30016~1200W

(150300Volts 2148 Amps)

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OPERATION Measure wattage bymiddotconn8cling a wattmetervoltmeter andmiddot~ete~8sshownin Figtt81 The ~-MPstttOn mustO be~middotconn~middotin series- with the ioad and-the

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VQTS con mUstmiddotbeqo~n~middotiJ1 prU9l1elwith the load protected against overloads by diodes

The Otlrrent~Coils are

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-FIGURE 1 WATTMETER CONNECnONS 14IJ -- -

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Each wa~eter has tWomiddot Voltage mtinp (150 and- 800V)~ Rotating the range -switclirounterciOCkwise from OFF engages the 150 volt range Rotatmg the _range SWitch clOQkwise from O~ engages the 800 volt range Utilize the Voltmeters readiDg to determine the approprlllte-range

Each wattmetermiddot has three currentmiddot ratings (2 4 and SA) Rotating the range swiJchfrom middotO~engages the Samprarigefbst ~ the wattm~termiddotreadsbelow ~r 8Cll18 and the ammeter indicates that the 4 amp rating will not be ~e9 ~ectmiddotthe 4 ainp range-middot If the mttnie~ again reads below balt scaie and the ammeterindicates that the 2 amp rating will no~ bemiddot exceeded the 2 amp range may bese1ectedI

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L FIGURE 2 WATTMETER CONNECTIONS 3fi1

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L middot The totalwatbge is the sum of the two meter readings PI and P2

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two ~eterS VlLL~PT be the same except at 1D1ity power factor middot -shy

When the power factor of the circuit is less than 509b the pointer of meter PI will reverse~ To obtain total wattage in this case reverse the current connections to metet Pl -then subtract the rea~g ormeter PI from that of meter P2

The twO-wattmeter~method cannot be used with as-phase 4-wire load Three wattmeters are ~ in that case

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POWER FACTOR i f ~

Given a balallCed load the~oWer tacentor middoteanbe -d~emiined from the two wattmeter mth6cL - ~

L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

J be calca1ated -from-the -following_equation0

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tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

wherep2 repr~ts th~~ier~thetwoWl1ttiJ1~ re~ingswhentbepower faeto~l~other thaD uPity

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BiDet th~powertaetb~ 8q1alsthcosme ofthephaseangletP~powerfactor may also be I deterJninedfromtheratioo~thetwo wittmeterreadings middotmiddotThegraph b~ow shows the1 I

I relationship between themiddotpowerfacior andth~ratio~f P1lP2 ~

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MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

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L OPERATIONI

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DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

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agt If the currePtis~ter than 5 amperes the needlewDI move off-scale TuRN OFF POVER IMliEDIATELY AJf exception to this may be on motor starling Momenshytary current inrushbullmay exceed 5 ampe~ but theneedleiminediately drops back to normal

b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

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1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

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a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

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MODEL-1723 rACHoME~R

DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

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MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

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OPEBATIONTouSe the powermiddotpanelt (lISt tum ON ~MAIN AC circuit breaker~i This will m~tethemain AC pnot Hght and 9nergize the four-pin ~Pyen~i supplying fix~208120VAOtliree-phase poWer Th~ other 1ixed~d~Je sulpHes may

l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

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L I tNOTE ~~ ~~ltage oo~~lbob fOr the 0-208120V three-phase sUpply is ~ted at the ~nd or the

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IfanY~r~es11PplifSri-e~vefloaded one or more circuit breakers may trip middotOFF Al- ir ways turnthemiddotVariable suppllesto zero and remove the C8usaopound the oyerload before resetshy

JL ting the circuitmiddotl~~em

A pindiilg ~ groun4 oenn~oDis proVided at each end or the panel fOrgrounding the rotating macbin~

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Page 11: [1 Table D. - UTKweb.eecs.utk.edu/~jsl/ECE325/ECE325-LabManual.pdfLab #2 Load-Speed Characteristic of a DC Motor . Objective . The objective of . this . lab is to . detennine the load-speed

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Lab 2P~~t A Wiring Diagram

PQVIER PANa

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Lab 2 Part B Wiring Diagram

POWER PANEL I bull

1 i 0 0 Omiddot 0 0lshy

120VAC 0-24011fOVAo-so-tW t2OVAC MAINAC PAl bull OmiddotSOVDC bull SEC PAL o-125VDC bull SEC tOVAC

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0 ~ 0 0middotL 0 ~ EJ ~ ~ EJ 0 ~ 0 i I

A B C N o~ N A B C N + +L g 0000 00 0000 It

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I bull i ~ Thoobjective of this lab is to understand th~ fwidamentals of a 3-phase induction motort-to g

calculate the parameters ofan inductionmotorequivalent circUi~ and to compare the calculated values with measured values L

Pre-La))

(

1 What are the two typeS ofrotOis used mAC inductlonmotorsl t 2 Give theequation for SYDchrono~ speed What is the synhronous speed for a four pole AC ~

L ~d-qctiltgtn~bine (standacent ~efrecFJe~) 3 Define slip for an induction motor If thesynchronous speed is 1800 RPM and the slip (s) is

L 001 what is the rotor speed Ifs == 011 -

l bull 4 Draw a power flow diagram for an AC induction ~otor

5~ middotmiddotDrawatorque VS~ sp~d curve for ail ACinduction motor What is the torqu~ prodnced at synchronous speed (Ns)

6 DescnDemiddot~ no-load test and the blocked rotor ~t for an induction motor Whatis the value ofslip for a Blocked ~otor Test

7 Draw the lEEE-recommended equivalent circuit~ shyL

Calculations C l

l Given the follow~g test results

fLj No-load test Line voltage= 210 V

Linecuxrent iO77 A

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Iiiputpower = 52 W L

I - Blocked-rotor test Line voltage ~ 60V shy tinecu1rent 17 AJ - shy

Input power == 100 W

Also given stator r~tance (Rl) =53 Wphase DL synchronous speed (COsyn) =1885 radlsec

L (R~ember that you are worldngwith a 3-phase machine)

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1 Calculate the parameters of the lEEE-~~ended equivalent circuit 2 Calculate the induction motornopad rotational Io~ 3 CalculateI2t I1t PF Fin Ptiutt Eff and ToutfQrslip v~ues fa11ging from 0 to O~l (with

L step siZe 001) (Pont =Pmech - Prot and Tout = Tmechgt

3 ~lot outputtorque versus speed ~ 4 Plot power factof versusoutput powe~ 5 piot AC)ine current versus outpu~power

i 6 it Plot efficiency versus outPut pow~ shy

LabormiddotatorY Exercise LabgratolY Setup

J

L 1 S~tUP middottheOC machine as a sep~te1y excited generator with variableresistance load bank andthe wo~drotot motor as an indu~on motor to drivemiddotthe DC generator (Connect the

indu~Otimotorstatotwindirigsfu a delta confi8uration) This is shown in the Lab 3 Wiring Diagrallt ~

3 CQ~tXtawattmetet to measure power into the itlductionmotor 4 CoDnectDC meters tomeasure DC generator ~nniDalvoltage and armature current 5 Connect AC ~terStOmeasweline to neutral voltage and line current

j 1

- Laboratoxy Me~ments

J 1 Mechanically conple the induction motor to the DC generator-

2 Bring the 3-phase AC voltage to 120V (line to n~tral) ~ I

i 3 Whenmiddotthe induction mot-or is running (around 1783 RPM) bring the nmiddotc machine terminal ~ ~ ~oi~ uP to 125 V middot

4 ~~centfu~ucti~n m~tofv~ues offOtor sp~ed regt vol~age1inetoneutral (Vt(l-n) line CUlTent t shy bull bull bull bullbullbull ~ bull t bull bull bull bulll

(lOt andp~~rofone_p~e (WI)bull middot 5 RCCC~d DC generator values values ofvoltage at terminal (VVand armature current (Ia)

6 First take a set ofmeasurements with all the resistance switches off 1 middotTheD continuerecordingmiddotas theJoad is increased up to ACmiddotllne current of 15 A Do not

exceedthis currentlimitl1

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CalctilationS

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~ 1 Calculate values for Pin Pout PF Eff~ atidTout

t Pin=3~Wl ~ shyd

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L PoUt~V~ogtc)jIa +Ia~Ra ~Pr~~

l PF= WI (Vt(l-n) II)

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L Tout= Pout6012nN

f 2 Plot ()utput torgue versus speed ( L- 3 Plotp01l-er fa~torve~u~middot outp~tpoer

4 Plot AC line current v~~outputpower f 5~i Plot~fficl~ncy verSusoutputPQwer L 6 Con1p~ethe ~resu1ts wi~thecalcu1ated results 7 CommeIJton the wisdom ofbuying an indu~on motor having a signijican~ygreaterporse i L power ra~g than iSrequiiedmiddot to dothejob~

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Lab 3 Wiring Diagram

PONERPANa

0 0 0 0 0 120VAC ~laquoNAD4O-4W 12OVoAC MAINC PAl bull o-1atNDC - SEC PAL bull 00121VDC bull SEC 12OVAC

0 ~ 0 0 GJ EJ []] 0 GJ ~ 0 ~ 0

A 8 C N + 0000 00 Q

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La) 4 Synchronous Motor

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L Objective

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L The objective of ~ lab is tomiddotexamine the terminal characteristics ofa synchronous motor under - I08(fand no-load conditions

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Pre-Lab

i - L 1 Whatisan important feature ofsynchronous motors

~ Dra~ariequivalentcircuit modetfor a synclnypousmotor ShowEf Xs Ra Iat~Vt If and

the fiel~winding 3 Descripe the open-eircuit test ~t is measured What is varied Sketch the circuit 4 Descn1le the short-circuit test Mat is measured What is varied Sketch the circuit 5 Sketehatt open~ircuit ch8rac~riStic aDd a short-circuit charac~eriStic Show Ia (rated) Vt

(rated) a11da modified airgaplineL

Laboratory Exercise f Part A L

The open-circuit and short-circuit tests will be performed to determine values f~r Xs and ~using

LI

the synchronous machine as a generator

Procedure

1 ~ Connect the DC machine as a selfexcited shunt generator 88 shown in Lab 4 Part A ~g

diagram

2 ~ Couple the DC machine to the syn6~nous machine f 3 Set the 0-125 VDCbob to zeromiddot L

4 Set the 0-150 VDC kn~b to zero 5 Set the synchron~us mac~e to INn START e

6 Bring the DC~cbine terminal voltage up to 125 Vt and adjust the field rheostat to obtain a speed of 1800~M

7 Set the sYnchronous machine to SYNCH RUN 8 Perform the open-circuit test With the synchronous machines terminals open measure the

( voltage across the windings (V00) as field current (If) in increased Increase the field current t - by increasing the DC voltage across the field winding Vary If from 0 to lA in increments of

l 9 OlA Set If to zero

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10 Perform the short-circuit test Short the ph~ windings of the synchronous machine and put

i i an ammeter in series with the shorted windings Measuremiddotthe average windingcurrent (Isc) as L

If in increased V~If from 0 to lA in increments ofOlA ( t

i L- Calculations

1 4~middotVt = Voc =120middotVcaJ~ulatcentmiddotXs and K(Xs =Voc IIsc andK= Voc I If)

2 P16tIIalvs If~(IIal =1Vt--KIf) I Xsi ) t L Part Bmiddot L The annatuIecurrentwill be measured agfield current is varied under loadmiddot and no loadconc1itions

L-

-

1 Connectfh~sySte~ as sbownin the Lab 4 Part Bwiring diagram but do not couple the syn~~riq~-~tiinetothe DC machine~

2 Senhe~chronousmac~to lND STARr 3 Thin tbe6-1S0vnpknobto position cO5~

4 TumODmailtpoiVer

( S S~ the synclnpnbusmachine tq ~YNCH RUN The motor speed should be 1800 RPM L 6 MeasureIa andItas If is varief1 up to lA

Load Procedure shy

1 TUm offmain power 2 Mechanically couplethe synchronous machine to the DC ~hine

3 Set~~ first nine switches of the resistance load to ON ) 4 Setthe-~chrononsmachine to lND START L

5 Turno~middot-m~~wer

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1~ 6 Tuni the~o-lS0VDCknob to position 20bull

~ 7 Settheo-l25VDCknobtoposition pound9 tbull

8 Set the synchronous machine to SYNCH RUN The motor speed should be at 1800 RPM 9bull Measure Ia and Ifas Ifis varied up to lA

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1 Plot Ia V8 If for load and no load conditions and compare with c~cu1ated graph

2 Is there a best~fieldcurrent at which the synchronous machine should be operated

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POWER PANEL

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SERI~S100 OPERATINGINSTRUCTIONS amp bull ~

MODEL WRM-100-3A WOUND-ROTOR MOTOR

GENERAL The WRY-100-SA is a three-phase four pole wound-rotor motorconsisting of a stator winding and a rotor winding withldip rings and brushes A three-pole

~ circuit breaker ~ also provided in the termm81 box The nominal ratings of the motor ari~ circuit breaker are listed below r

1 J l-- SPECIFICATIONS MOTORL

WmdingTypeshy Wound Btafor amp Rotor Horsepower shy 13HP Speed shy 175QRPM Voltage bull 20SV bull Sf Amiddot or 860V-s+Y

I Frequency- 60Hz L- Rating Continuous

Full Load Current bull 17 Amps

CIRCUIT BREAKER

Type of Operator bull Rocker Switch L No of PoleS bull Three

Overload )pe bull Thermal Trip Rating shy 2DAmpS Reset Method - middotOW- to Reset

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in Figure L Rotate the Wound Rotor Speed Control ~b to the maximum resisshytance fttn~ counterclockwise direction With all th~ ~ce in the rotor cir middotcai~ the motor-willdevelop maxirilum starting torque and minimum ~g curshy

rent Pwih up the rocker switch on the circuit breaker~ startmiddottqemotorbull The motor will accelerateup to speed The rheostat providesthe mSansofv~g theL motors lQieedtorque characteristicS The effect of the rlieostat increUes with increasing load onthe motorr ~

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A 6 C AC INPUT SI1PPLY

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FIGURE 1

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GENERAL

SPECIFICATIONS

middotMODEL SMmiddot100middot3ASYNCHRONOUS MACHINE

ThemiddotSMmiddotI00-8A is a three-phase four-pole machine consisting of a wyedel~ stashytor andmiddot 8 quadrature rotor having a DC field winding and a damper winding A three-pole circUit breaker and a IND START-BYNC RUN switch are provided in the terminal OOx- RatingS fonow

SM-100-3A MOTOR ampALTERNATOR

Speed - 1800 RPM Voltagemiddot Max Ambient Temp Insulation bull Rating bull

CIRCUIT BREAKER

Type of~tor shyNo ofPoles bull Overload Type bull Trip Rating bull Reset Methoa shy

ALTERNATOR

Power-Load Current bull Fielti Excitation shy

MOTOR

HorSepowershyCurrent bull Frequencyshy

208120V-B+-4W 4~ (1047) ClassmiddotB Continuous

Rocker Three Thermal L7amps

middot middotOFF to Reset

250 watts 07 amp (nominal) Separate L6 amps

18 HP 17 Amps 60Hz

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OPERATION Th~ proper connections tor operation of th~ SMl00-SA ~ a ~clttonous (SYNCHRONOUS motor are shown in Figure middot1 With ~ ~tebin the SYNC RUNposiliou MOTOR) ~ze the vari~ble DC supply and adjusttbe~tput voltage from zero up to

th~ value which eauses 1 amp to flow through the rotor ~turn the switch to the lNDSTART PO$ition middotand Start the motor by toggling~becircuit breaker to

the ONposltion WJten the motor reaches DO lQad 1ij)eeC1 move the switch to the SYNC RUN posItion The rotor will then sYnchronize with the nn~ and fJ1e motor wiD be ti1mrlng at exactly 1800 RPvL Used to demonstrate the Wrious ~tics of synclirOnous motors

+VARIABlpound DC

_sUPPLY

STATOR ROTOR middotL1middot 11 A~~-eJ-----CJ

middot AC u l 12

~~YB~T middotJ3~T3

ct-O--ltr

VARIABLE + DC SUPPLY

FIGURE 1 SM-10o-3A AS A SYNCHRONOUS MoioR

ABC AC SUPPLY INPUT

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OPERATION The proper ampinn~~ fo~ operation or the SM-l00-SA as an alternator are ALTERNATOR) shown in Fi8Ure ~ With tliese connections made and the switch in the SYNCL RUNposition drive the alternator at 1800 RPM With a sUitable prime mover

Energize the DC Voltage supply and increase thesupplys output to bicrease f themiddotslternatorts output voltage to the desired value Toggle the circuit breaker ~L ~ tlie ON pPSition to connect the alternators output to the load Used to

middotdemonstrate the characteristics of a polyphase alternator of the stationary arshyr mature typebull ~t may also be used asthe loading device when testing the varishyI oUsmotom- shy

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OUTPUT

rmiddot~ FIGURE 2 L SM-10o-3A AS AN ALTERNATOR

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SERJES100 OPERATING INStRUCTIONS

oMOoDEL DMmiddot1 DDA DC MACHINE

GENERAL The DY-10OA is amiddot two-pole compound-wound machine ~g of a shunt field a series field and an armature winding A shunt fie1dmiddotr~t and two-pole startel switM are also provided in the-terminal box ~tings follow

SPECIFICAnONS

MACHINE

Shunt Field Ex SepO5A 125V Insulation CJass F middotMax Ambient Temp 40 ~C (104 OF) Rating Continl101iS Speed 1800 RPM nominal Shunt Series Compound wo~dJl1Otcr

125V SOAt 18 HP Shunt Series Compound wound generator

RHEOSTAT

Resistance Power Current middot Taper Fuse Minimum Resistance Position

STARTER

Type of Operator No of Poles Overload Type Trip Rating middot Reset Method

125V 2A 250KW

800~Ohms

100 Watts O575middotAmps Lin ear 1A SJo Blo

Toggle Two Thermal 4lAmps Push Toggle down

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L FUNCTION The primDrJ function or the DC motor is to demonstrate the characteristics of

shunt series ancl compOund motors~ It IIl8Y also bemiddotutiHzed as a prime mover when testiJlg a gel1eraloror alternator Using the DCmiddotmotor tor this PurPose has the advantage th~tbe speed may be held constant bymiddot8djusting tJie shunt field rheostat after each load step is applied

L OPERATION The -proper connections for operation as a ClUDulative compound DC motor are

(DC MOTOR) shOWDin Fipre i Withmiddot theseoonndionS made the motor may be started by moving the starter switch toggle up to the ON position It is good praetioe to stad the motor with the shunt field rh~ in its minimum resistance fully COW position to provide m8amum starting torque andmiDitnum starting Curshy

L rent The motor may then be adjusted ~ the desired speed byadjUBtingtbe field rheostat or varying the line voltage

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1 125VDO SUPPLY

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FUNCTION The DC generator is p~arily utili2ed to demonstrate the characteristics of shunt series ~dCOinpound gen~tors It is~ alsOusedastlle loading device

when testing the vari~us motors

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OPERATION The~CODnections tor operation as a cmnulative C()~po1l1ld nCgenshyeratorareshown in Figure 2 With these connectio~middotmiddotDltldeJ drive theJDCmiddotGENERATOR gen~-atapproxhnately1800RPM with a suitable p~e moVer With thefie1qrheostatJnits Jll8Ximum resistance fullyc1ocm~ position enshyergiZe thel15V DC field supply Rotate the field rheostatinthecltunter

shy clockwisedir$ctian middottoinCreasemiddot the output voltage middotto the desiredmiddot value Switch Oti~middotthemiddotoverloadmiddot switChmiddotto connect the generators output to the

resistance load

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OUTPUT

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MODEL MGmiddotBmiddot100DG BEDPLATE f

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The MG Bedplateconsists of a heayy s~ baBe n10~~middotmiddoton vibration pads The

I - GENERAL

function otthe bedplate is toe~le the quickmounting ~dcoup1mg of the two individ~ macbiDoes to form a completemiddotmiddotm~ior-Pnerator setpwothreaded hpldshy

~ down)1Ocks ~d winged screwsareprovidecltoseeurethe F t claJnps which hold tbeinBcbinetsmounting boards A couplingguard and two shaft ~gwrrds are p~

r vided to p~ttheSiudenttrom accidet1talJito~gor~~gwires0l1 rotatshy- shy ing)arts The guardsmiddotare quickly mounted bY insertirig retamer CUpS in~T~9tsin

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The procedure for mou~ting and ioupling the machines to the base is as fon~

L 1 A~just each wing screw 021- ~e two screw clamp hold~ownmiddot ~locks to the top of its threaded stud - 0

i 2 Place each ~chine so that the rear of the base is reSting agairistmiddotthemiddot thd rear clamp on thei L- MGbasemiddot

8 Slide machines iJiboara until ~elrcouplingl1anPs are centered oVer cen~ slots 4 bert rub coupnngmiddotsleevemiddot~toone of the mac1dnes co~pling 1IimgM~ L

5 Slidere~jning machines coupling flange into-the other side of couplbig sleeve 6 Checktobe Sure thatmiddot~e couplhig guard will cOver coupling when insertedmiddotinto one ot thel pails areenter slotsmiddot 7 plaCe front clamp tor each of machines against the front or the two macbiD5t bases

(- s 8 F~pr tighten ~~uts 9it middotthe two screw clamp hold-down biocks Lmiddot 9 Mount coUplini aDd shaft guards by locating appropriate retainer clips in slotS so that coushy

pling is ~der co~Ung guard and ~ sh~ is covered by a ~haft guatdL

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MODIL1-10oaA TRANSFClRfJIER OEMONSTRATOR

GENEijAL The TlOO-8A~~ts of three Single-phase bansformers wit~ m11Jtiple primary and secondary taps terminated atpinreceptacl~on the front of the unit Each of the three ~rOrinersmay beused independen1q Or the threemay~interconmiddot

f nected mseries~1npQmneJ or inmiddot many poJyph8seCbnfigurations

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EacbtraDslormer is~~middot af)vol~amperesat 60 Hertz ~ has two primary~d

two secoDdaqwindiIlBL Each ofthe priD1817 windiD~1tas800 turns of Nobull 24 gauge-wire and JSmiddotm~-120volta 05 amperes Onewhidingis tapped at 82 volts toprovide~~middotS~tttllp~(866$)middot~fthemiddot twomiddotwiDd1np~ 68ri~ Each or thesecondshylQ7middotwindh1pmiddot1uIs100t11rns of No 21 gauge wire and israted 60 volts 10 ampere One winding Js tappbd atmiddotlaquo volts to p~vide a Scott tapor the two windings in series Shownbelow are the voltage ratings orthe various taps for each of the three traDspoundormers

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t o 32V 120V 0 120V lI__

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t bull MODEL middotRLmiddot100AmiddotRESISTANC~LOAD J J- shy~ GENERAL The RL-IOOAfs variable ftsistance unit used to applya resistivel0a4middottogenera

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tors or altemators One unit may be used in single-phase applications ora bank L of tlmae units may be combhled intQ Wye or De1taCOnt1IJDlt1~DS tor three phase

applicmioDS TiieRL-lOOA mttoduces resistieload~ ~sequentild steps r designed to prod11CB approximateiy equal ipcremeJlts otJoadmiddot~tmiddot The SPST f ~ toigle switches are numbered andmiddot must be cloSed in nUD1erl~ordertodecrease

totlreslstance~creasmglOad The total ~cemiddot or the cOb~ected~rs ( may be COmputed f~theequation L

middot 1 1 1-1 ~=R1+Ri+lt8middotmiddotmiddot

The ConowingO equations may be used to detemUne the power disSipated from a measurement of load currentor voltage

L P=EI = = I~

p (ampp) = 8 xEpBPH (tor balanced ioad)

Where P=P~inWatb

E =yoltage inVolfB I = Currentin Amperes

f R =Resistance in Ohms L P(Stp) =middotmiddotTotalPower for Three-Phase

~H ==~ Voltage per Phase~r Load Bankf L bull IpH = Ourrent per Phase ofLoad Bank ampshy

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~ SERIES 100 OPmiddotERATmiddotING INSTRUCTIONS

MODEL RLC-100RESmiddotISTANCE-REACTANmiddotCE LOAD

The RLCl00 ismiddota variable resistance and--reactance- (either ~ductive or capaci- tive) uDit that ~y be used _to apply a singl~plmse or a three-phase load The remstive load (w~ can be ~ for both middotACcd DC) is controDed by siz SPST toggle switches e8ch of which puts 2000 ohlnaof resistance in paraDelmiddot lor all three phases simultaneouslybullThe resistive-load is therefore always balanced The total resistance in eacli ph8se equals 2000- ohms divided by the Dumber of switches closed For example with two sWitehesclosedtbe total resistance-is 1000 ohms rith aUsiZ closed 8888 ohms Each or the three reactance loads (used forAC o~) separateVfused at 1 amp is controlled by a knob that varltlSthe degreeopound lead andmiddot l8g A clockwise rotationof the middotknob applies leadiIlg pOwer factor (cashypaCitive)loid while a counterc1~ rotation appIiesa lagging power factor (inductive) load There is DO lpadapplied whenthe-knob is in mid position

The 8-4-5 right triangle graph below may bemiddot~ to approximate a O~8 power factor leading or lagging

1 Appfi a resistiVe load 2 Readthe in-phase current h from -the ammeter 8 From the lR value on tlie horizontal base of the graph travel vertically to the

point where it intersects the 08 PF (total amps) line 4 Frommiddotthis point travel horizontally to the reactive current wlueIz 5 Adjust the ~ve load until the Ix ammeter reads this value of reactive cur

rent

6 To obtain a ~ced load in a three-phaseconfigaratioD repeat Step -5 for the other two~

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RESISTIVE AMPERES

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-17 35 Henry

-13 47 Henry

middotINDUCTANCEDIAL POSITIONmiddot (~middotQLJNT~RCmiddotLOCKWJSE)

-12 51 Henry

middot11 ~ 57 Henry

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-5 143H~nrYmiddot

-15 ~41middotmiddotHQIllY

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-16 37 Henry~

-7 97 HefJry

middot6 middot1tt~H~nry

-18 33 HenlY

DIAL POSITION CAPACITANCE (CLOCKWISE)

0 69 llF

1 1~57 J1F

2 316 J1F

3 501Jlf

middot4 640J1F

5 80~J1f

6 985 j1f 7 1160middotpF

8 1360J1Fmiddot

9 1609middotJ1F

10 18~JtF

11 2007~middotF

12 2170 fLF

13 2513 )iFmiddot

14 2860J1F

15 3090 pFmiddot

15 3269JlF

17 3539 JlFmiddot (

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SERIES 100OPERATING INSTAUCTIONS L

- -

-

MODJL ACVA-10()ACMETERINGPANEL L GENERAL The HAMPDEN Model ACVA-1OO consistsmiddotol two AC ammetem and one AC voltshy

meterA11 or the meters are dioaeprot8cted against overloads as high 1Ui 1000f

The ~ltmeter islicctt8 within 8 w1UIemiddotthe ammeters are accurate wi~hin ~ plusmn29D ormiddotfWl sCale dellection The middotme~rshave the following ranges

r I AC Voltm~teI Oto l00~OO V~ts ~ AC Amme~ OtlJQ5f2f4l8-Amps

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OPERATION

AC AMMETERS

L 1 Connect the ammeter in series so that the middotentire AC current to be measured passes

I through the ~~ter The test lead from the dark blue middotbindingpostis connected to one

side or the Dne and the test lead trom the Qrange bin~ post to the other ~ L

2 ~e choice or measuring range is iet with the range switch Fourmiddotranges are avaiiable O 05 0204 an~ 0 - 8 amperes

8 Set the rangemiddotswitch on the 8 ampere range Detore turning on the power

a) When ~ to measure motor current put a jumper lead between the tWo binding poststo protect the movement from the large inrushcurrent at start This jumper is

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removed after the motor has started

--~---~--~_--------~---_~_----ENGINEERfNG CORPORATION

MANUFACTURERSmiddotOF rpUIPMCNT F()R EDUCATION AND INDUSTRY

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MODELACWM-1 GO WATIMETER PANEL

GENERAL The1iAMPDEN Model ACWMmiddotI00 consists artwo Iilulti-rangewattmeters and

I tbe~tchesh-lh~r operation Eacli has ~e follOwing ranges l

)to 1~30016~1200W

(150300Volts 2148 Amps)

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OPERATION Measure wattage bymiddotconn8cling a wattmetervoltmeter andmiddot~ete~8sshownin Figtt81 The ~-MPstttOn mustO be~middotconn~middotin series- with the ioad and-the

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VQTS con mUstmiddotbeqo~n~middotiJ1 prU9l1elwith the load protected against overloads by diodes

The Otlrrent~Coils are

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-FIGURE 1 WATTMETER CONNECnONS 14IJ -- -

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Balanced Load

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Each wa~eter has tWomiddot Voltage mtinp (150 and- 800V)~ Rotating the range -switclirounterciOCkwise from OFF engages the 150 volt range Rotatmg the _range SWitch clOQkwise from O~ engages the 800 volt range Utilize the Voltmeters readiDg to determine the approprlllte-range

Each wattmetermiddot has three currentmiddot ratings (2 4 and SA) Rotating the range swiJchfrom middotO~engages the Samprarigefbst ~ the wattm~termiddotreadsbelow ~r 8Cll18 and the ammeter indicates that the 4 amp rating will not be ~e9 ~ectmiddotthe 4 ainp range-middot If the mttnie~ again reads below balt scaie and the ammeterindicates that the 2 amp rating will no~ bemiddot exceeded the 2 amp range may bese1ectedI

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L FIGURE 2 WATTMETER CONNECTIONS 3fi1

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L middot The totalwatbge is the sum of the two meter readings PI and P2

f When pow~ in a ~ced load is m~ured in this ~er the indication or the 1

two ~eterS VlLL~PT be the same except at 1D1ity power factor middot -shy

When the power factor of the circuit is less than 509b the pointer of meter PI will reverse~ To obtain total wattage in this case reverse the current connections to metet Pl -then subtract the rea~g ormeter PI from that of meter P2

The twO-wattmeter~method cannot be used with as-phase 4-wire load Three wattmeters are ~ in that case

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POWER FACTOR i f ~

Given a balallCed load the~oWer tacentor middoteanbe -d~emiined from the two wattmeter mth6cL - ~

L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

J be calca1ated -from-the -following_equation0

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tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

wherep2 repr~ts th~~ier~thetwoWl1ttiJ1~ re~ingswhentbepower faeto~l~other thaD uPity

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BiDet th~powertaetb~ 8q1alsthcosme ofthephaseangletP~powerfactor may also be I deterJninedfromtheratioo~thetwo wittmeterreadings middotmiddotThegraph b~ow shows the1 I

I relationship between themiddotpowerfacior andth~ratio~f P1lP2 ~

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MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

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DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

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agt If the currePtis~ter than 5 amperes the needlewDI move off-scale TuRN OFF POVER IMliEDIATELY AJf exception to this may be on motor starling Momenshytary current inrushbullmay exceed 5 ampe~ but theneedleiminediately drops back to normal

b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

L

1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

L

a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

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POmiddotBox 563 East Longmeadow MA 01028 (413) 52S~S981 o11X 95middot5426 bull Pax (413) 525-4741

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MODEL-1723 rACHoME~R

DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

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MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

L bull Fieci120VAC 15A~u~tWod~plex receptacles bull ~12OVAC single-pJiase2-~lOA bull FiX~208120VAC~phase 4-wire15A bull VariabJe 0 ~ 24oI14QVAC8-~i~~9A

f bull -Vari8bleO ~ 150vnQ-i~(lA isolated l~RMS L bull Variable 0 ~ 125VDCt 5Q -isolated ItlmiddotRMS middot

OPEBATIONTouSe the powermiddotpanelt (lISt tum ON ~MAIN AC circuit breaker~i This will m~tethemain AC pnot Hght and 9nergize the four-pin ~Pyen~i supplying fix~208120VAOtliree-phase poWer Th~ other 1ixed~d~Je sulpHes may

l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

cuit ~~ (both ~ ~ncl BEc) A clockwise lOtation of the vol~cpntro1 -- ~ ~eause ~~~~the voltage a~ble at the appropriate 1~Ptashy

L I tNOTE ~~ ~~ltage oo~~lbob fOr the 0-208120V three-phase sUpply is ~ted at the ~nd or the

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IfanY~r~es11PplifSri-e~vefloaded one or more circuit breakers may trip middotOFF Al- ir ways turnthemiddotVariable suppllesto zero and remove the C8usaopound the oyerload before resetshy

JL ting the circuitmiddotl~~em

A pindiilg ~ groun4 oenn~oDis proVided at each end or the panel fOrgrounding the rotating macbin~

ENGINEERING CORPORATION -----MANUFACTURERS OF eciuaPMENT R)R EOUCAT1ON AND INDUSTRV bull

PO Box 563 East ~ow IdA 91028 (413) S25-S9ff1 bull nx 95-5426 bull Fax (41~) S2S-4141

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Page 12: [1 Table D. - UTKweb.eecs.utk.edu/~jsl/ECE325/ECE325-LabManual.pdfLab #2 Load-Speed Characteristic of a DC Motor . Objective . The objective of . this . lab is to . detennine the load-speed

1 L

Lab 2 Part B Wiring Diagram

POWER PANEL I bull

1 i 0 0 Omiddot 0 0lshy

120VAC 0-24011fOVAo-so-tW t2OVAC MAINAC PAl bull OmiddotSOVDC bull SEC PAL o-125VDC bull SEC tOVAC

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0 ~ 0 0middotL 0 ~ EJ ~ ~ EJ 0 ~ 0 i I

A B C N o~ N A B C N + +L g 0000 00 0000 It

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l shy Lab 3middot Induction Motor Performance (

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L Objectivemiddotmiddot

I bull i ~ Thoobjective of this lab is to understand th~ fwidamentals of a 3-phase induction motort-to g

calculate the parameters ofan inductionmotorequivalent circUi~ and to compare the calculated values with measured values L

Pre-La))

(

1 What are the two typeS ofrotOis used mAC inductlonmotorsl t 2 Give theequation for SYDchrono~ speed What is the synhronous speed for a four pole AC ~

L ~d-qctiltgtn~bine (standacent ~efrecFJe~) 3 Define slip for an induction motor If thesynchronous speed is 1800 RPM and the slip (s) is

L 001 what is the rotor speed Ifs == 011 -

l bull 4 Draw a power flow diagram for an AC induction ~otor

5~ middotmiddotDrawatorque VS~ sp~d curve for ail ACinduction motor What is the torqu~ prodnced at synchronous speed (Ns)

6 DescnDemiddot~ no-load test and the blocked rotor ~t for an induction motor Whatis the value ofslip for a Blocked ~otor Test

7 Draw the lEEE-recommended equivalent circuit~ shyL

Calculations C l

l Given the follow~g test results

fLj No-load test Line voltage= 210 V

Linecuxrent iO77 A

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Iiiputpower = 52 W L

I - Blocked-rotor test Line voltage ~ 60V shy tinecu1rent 17 AJ - shy

Input power == 100 W

Also given stator r~tance (Rl) =53 Wphase DL synchronous speed (COsyn) =1885 radlsec

L (R~ember that you are worldngwith a 3-phase machine)

~ 10

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1 Calculate the parameters of the lEEE-~~ended equivalent circuit 2 Calculate the induction motornopad rotational Io~ 3 CalculateI2t I1t PF Fin Ptiutt Eff and ToutfQrslip v~ues fa11ging from 0 to O~l (with

L step siZe 001) (Pont =Pmech - Prot and Tout = Tmechgt

3 ~lot outputtorque versus speed ~ 4 Plot power factof versusoutput powe~ 5 piot AC)ine current versus outpu~power

i 6 it Plot efficiency versus outPut pow~ shy

LabormiddotatorY Exercise LabgratolY Setup

J

L 1 S~tUP middottheOC machine as a sep~te1y excited generator with variableresistance load bank andthe wo~drotot motor as an indu~on motor to drivemiddotthe DC generator (Connect the

indu~Otimotorstatotwindirigsfu a delta confi8uration) This is shown in the Lab 3 Wiring Diagrallt ~

3 CQ~tXtawattmetet to measure power into the itlductionmotor 4 CoDnectDC meters tomeasure DC generator ~nniDalvoltage and armature current 5 Connect AC ~terStOmeasweline to neutral voltage and line current

j 1

- Laboratoxy Me~ments

J 1 Mechanically conple the induction motor to the DC generator-

2 Bring the 3-phase AC voltage to 120V (line to n~tral) ~ I

i 3 Whenmiddotthe induction mot-or is running (around 1783 RPM) bring the nmiddotc machine terminal ~ ~ ~oi~ uP to 125 V middot

4 ~~centfu~ucti~n m~tofv~ues offOtor sp~ed regt vol~age1inetoneutral (Vt(l-n) line CUlTent t shy bull bull bull bullbullbull ~ bull t bull bull bull bulll

(lOt andp~~rofone_p~e (WI)bull middot 5 RCCC~d DC generator values values ofvoltage at terminal (VVand armature current (Ia)

6 First take a set ofmeasurements with all the resistance switches off 1 middotTheD continuerecordingmiddotas theJoad is increased up to ACmiddotllne current of 15 A Do not

exceedthis currentlimitl1

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CalctilationS

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~ 1 Calculate values for Pin Pout PF Eff~ atidTout

t Pin=3~Wl ~ shyd

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L PoUt~V~ogtc)jIa +Ia~Ra ~Pr~~

l PF= WI (Vt(l-n) II)

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middotL

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L Tout= Pout6012nN

f 2 Plot ()utput torgue versus speed ( L- 3 Plotp01l-er fa~torve~u~middot outp~tpoer

4 Plot AC line current v~~outputpower f 5~i Plot~fficl~ncy verSusoutputPQwer L 6 Con1p~ethe ~resu1ts wi~thecalcu1ated results 7 CommeIJton the wisdom ofbuying an indu~on motor having a signijican~ygreaterporse i L power ra~g than iSrequiiedmiddot to dothejob~

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Lab 3 Wiring Diagram

PONERPANa

0 0 0 0 0 120VAC ~laquoNAD4O-4W 12OVoAC MAINC PAl bull o-1atNDC - SEC PAL bull 00121VDC bull SEC 12OVAC

0 ~ 0 0 GJ EJ []] 0 GJ ~ 0 ~ 0

A 8 C N + 0000 00 Q

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La) 4 Synchronous Motor

j I

L Objective

i

L The objective of ~ lab is tomiddotexamine the terminal characteristics ofa synchronous motor under - I08(fand no-load conditions

i L

Pre-Lab

i - L 1 Whatisan important feature ofsynchronous motors

~ Dra~ariequivalentcircuit modetfor a synclnypousmotor ShowEf Xs Ra Iat~Vt If and

the fiel~winding 3 Descripe the open-eircuit test ~t is measured What is varied Sketch the circuit 4 Descn1le the short-circuit test Mat is measured What is varied Sketch the circuit 5 Sketehatt open~ircuit ch8rac~riStic aDd a short-circuit charac~eriStic Show Ia (rated) Vt

(rated) a11da modified airgaplineL

Laboratory Exercise f Part A L

The open-circuit and short-circuit tests will be performed to determine values f~r Xs and ~using

LI

the synchronous machine as a generator

Procedure

1 ~ Connect the DC machine as a selfexcited shunt generator 88 shown in Lab 4 Part A ~g

diagram

2 ~ Couple the DC machine to the syn6~nous machine f 3 Set the 0-125 VDCbob to zeromiddot L

4 Set the 0-150 VDC kn~b to zero 5 Set the synchron~us mac~e to INn START e

6 Bring the DC~cbine terminal voltage up to 125 Vt and adjust the field rheostat to obtain a speed of 1800~M

7 Set the sYnchronous machine to SYNCH RUN 8 Perform the open-circuit test With the synchronous machines terminals open measure the

( voltage across the windings (V00) as field current (If) in increased Increase the field current t - by increasing the DC voltage across the field winding Vary If from 0 to lA in increments of

l 9 OlA Set If to zero

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10 Perform the short-circuit test Short the ph~ windings of the synchronous machine and put

i i an ammeter in series with the shorted windings Measuremiddotthe average windingcurrent (Isc) as L

If in increased V~If from 0 to lA in increments ofOlA ( t

i L- Calculations

1 4~middotVt = Voc =120middotVcaJ~ulatcentmiddotXs and K(Xs =Voc IIsc andK= Voc I If)

2 P16tIIalvs If~(IIal =1Vt--KIf) I Xsi ) t L Part Bmiddot L The annatuIecurrentwill be measured agfield current is varied under loadmiddot and no loadconc1itions

L-

-

1 Connectfh~sySte~ as sbownin the Lab 4 Part Bwiring diagram but do not couple the syn~~riq~-~tiinetothe DC machine~

2 Senhe~chronousmac~to lND STARr 3 Thin tbe6-1S0vnpknobto position cO5~

4 TumODmailtpoiVer

( S S~ the synclnpnbusmachine tq ~YNCH RUN The motor speed should be 1800 RPM L 6 MeasureIa andItas If is varief1 up to lA

Load Procedure shy

1 TUm offmain power 2 Mechanically couplethe synchronous machine to the DC ~hine

3 Set~~ first nine switches of the resistance load to ON ) 4 Setthe-~chrononsmachine to lND START L

5 Turno~middot-m~~wer

1i

1~ 6 Tuni the~o-lS0VDCknob to position 20bull

~ 7 Settheo-l25VDCknobtoposition pound9 tbull

8 Set the synchronous machine to SYNCH RUN The motor speed should be at 1800 RPM 9bull Measure Ia and Ifas Ifis varied up to lA

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Calculations L

1 Plot Ia V8 If for load and no load conditions and compare with c~cu1ated graph

2 Is there a best~fieldcurrent at which the synchronous machine should be operated

15 l

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Lab 4 ~art A Wiring Diagram

POWER PANEL

middot0 0 o o PAl bull Ql25VOC bull sec 120VAC120VAO 0--240114OVACJJ44W 120VAC

o0 [~l 0 ~ o0 ~ ~ AB C NON ABC N + bull

Q 0000 00 0000

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i -- Lab 4 ~Part B Wiring Diagram

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SERI~S100 OPERATINGINSTRUCTIONS amp bull ~

MODEL WRM-100-3A WOUND-ROTOR MOTOR

GENERAL The WRY-100-SA is a three-phase four pole wound-rotor motorconsisting of a stator winding and a rotor winding withldip rings and brushes A three-pole

~ circuit breaker ~ also provided in the termm81 box The nominal ratings of the motor ari~ circuit breaker are listed below r

1 J l-- SPECIFICATIONS MOTORL

WmdingTypeshy Wound Btafor amp Rotor Horsepower shy 13HP Speed shy 175QRPM Voltage bull 20SV bull Sf Amiddot or 860V-s+Y

I Frequency- 60Hz L- Rating Continuous

Full Load Current bull 17 Amps

CIRCUIT BREAKER

Type of Operator bull Rocker Switch L No of PoleS bull Three

Overload )pe bull Thermal Trip Rating shy 2DAmpS Reset Method - middotOW- to Reset

r I - shy OPERATION To operatethe ~-l00-SAas an induction motor make the connections shown

in Figure L Rotate the Wound Rotor Speed Control ~b to the maximum resisshytance fttn~ counterclockwise direction With all th~ ~ce in the rotor cir middotcai~ the motor-willdevelop maxirilum starting torque and minimum ~g curshy

rent Pwih up the rocker switch on the circuit breaker~ startmiddottqemotorbull The motor will accelerateup to speed The rheostat providesthe mSansofv~g theL motors lQieedtorque characteristicS The effect of the rlieostat increUes with increasing load onthe motorr ~

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GENERAL

SPECIFICATIONS

middotMODEL SMmiddot100middot3ASYNCHRONOUS MACHINE

ThemiddotSMmiddotI00-8A is a three-phase four-pole machine consisting of a wyedel~ stashytor andmiddot 8 quadrature rotor having a DC field winding and a damper winding A three-pole circUit breaker and a IND START-BYNC RUN switch are provided in the terminal OOx- RatingS fonow

SM-100-3A MOTOR ampALTERNATOR

Speed - 1800 RPM Voltagemiddot Max Ambient Temp Insulation bull Rating bull

CIRCUIT BREAKER

Type of~tor shyNo ofPoles bull Overload Type bull Trip Rating bull Reset Methoa shy

ALTERNATOR

Power-Load Current bull Fielti Excitation shy

MOTOR

HorSepowershyCurrent bull Frequencyshy

208120V-B+-4W 4~ (1047) ClassmiddotB Continuous

Rocker Three Thermal L7amps

middot middotOFF to Reset

250 watts 07 amp (nominal) Separate L6 amps

18 HP 17 Amps 60Hz

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OPERATION Th~ proper connections tor operation of th~ SMl00-SA ~ a ~clttonous (SYNCHRONOUS motor are shown in Figure middot1 With ~ ~tebin the SYNC RUNposiliou MOTOR) ~ze the vari~ble DC supply and adjusttbe~tput voltage from zero up to

th~ value which eauses 1 amp to flow through the rotor ~turn the switch to the lNDSTART PO$ition middotand Start the motor by toggling~becircuit breaker to

the ONposltion WJten the motor reaches DO lQad 1ij)eeC1 move the switch to the SYNC RUN posItion The rotor will then sYnchronize with the nn~ and fJ1e motor wiD be ti1mrlng at exactly 1800 RPvL Used to demonstrate the Wrious ~tics of synclirOnous motors

+VARIABlpound DC

_sUPPLY

STATOR ROTOR middotL1middot 11 A~~-eJ-----CJ

middot AC u l 12

~~YB~T middotJ3~T3

ct-O--ltr

VARIABLE + DC SUPPLY

FIGURE 1 SM-10o-3A AS A SYNCHRONOUS MoioR

ABC AC SUPPLY INPUT

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OPERATION The proper ampinn~~ fo~ operation or the SM-l00-SA as an alternator are ALTERNATOR) shown in Fi8Ure ~ With tliese connections made and the switch in the SYNCL RUNposition drive the alternator at 1800 RPM With a sUitable prime mover

Energize the DC Voltage supply and increase thesupplys output to bicrease f themiddotslternatorts output voltage to the desired value Toggle the circuit breaker ~L ~ tlie ON pPSition to connect the alternators output to the load Used to

middotdemonstrate the characteristics of a polyphase alternator of the stationary arshyr mature typebull ~t may also be used asthe loading device when testing the varishyI oUsmotom- shy

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OUTPUT

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SERJES100 OPERATING INStRUCTIONS

oMOoDEL DMmiddot1 DDA DC MACHINE

GENERAL The DY-10OA is amiddot two-pole compound-wound machine ~g of a shunt field a series field and an armature winding A shunt fie1dmiddotr~t and two-pole startel switM are also provided in the-terminal box ~tings follow

SPECIFICAnONS

MACHINE

Shunt Field Ex SepO5A 125V Insulation CJass F middotMax Ambient Temp 40 ~C (104 OF) Rating Continl101iS Speed 1800 RPM nominal Shunt Series Compound wo~dJl1Otcr

125V SOAt 18 HP Shunt Series Compound wound generator

RHEOSTAT

Resistance Power Current middot Taper Fuse Minimum Resistance Position

STARTER

Type of Operator No of Poles Overload Type Trip Rating middot Reset Method

125V 2A 250KW

800~Ohms

100 Watts O575middotAmps Lin ear 1A SJo Blo

Toggle Two Thermal 4lAmps Push Toggle down

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L FUNCTION The primDrJ function or the DC motor is to demonstrate the characteristics of

shunt series ancl compOund motors~ It IIl8Y also bemiddotutiHzed as a prime mover when testiJlg a gel1eraloror alternator Using the DCmiddotmotor tor this PurPose has the advantage th~tbe speed may be held constant bymiddot8djusting tJie shunt field rheostat after each load step is applied

L OPERATION The -proper connections for operation as a ClUDulative compound DC motor are

(DC MOTOR) shOWDin Fipre i Withmiddot theseoonndionS made the motor may be started by moving the starter switch toggle up to the ON position It is good praetioe to stad the motor with the shunt field rh~ in its minimum resistance fully COW position to provide m8amum starting torque andmiDitnum starting Curshy

L rent The motor may then be adjusted ~ the desired speed byadjUBtingtbe field rheostat or varying the line voltage

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1 125VDO SUPPLY

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FUNCTION The DC generator is p~arily utili2ed to demonstrate the characteristics of shunt series ~dCOinpound gen~tors It is~ alsOusedastlle loading device

when testing the vari~us motors

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OPERATION The~CODnections tor operation as a cmnulative C()~po1l1ld nCgenshyeratorareshown in Figure 2 With these connectio~middotmiddotDltldeJ drive theJDCmiddotGENERATOR gen~-atapproxhnately1800RPM with a suitable p~e moVer With thefie1qrheostatJnits Jll8Ximum resistance fullyc1ocm~ position enshyergiZe thel15V DC field supply Rotate the field rheostatinthecltunter

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resistance load

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OUTPUT

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The MG Bedplateconsists of a heayy s~ baBe n10~~middotmiddoton vibration pads The

I - GENERAL

function otthe bedplate is toe~le the quickmounting ~dcoup1mg of the two individ~ macbiDoes to form a completemiddotmiddotm~ior-Pnerator setpwothreaded hpldshy

~ down)1Ocks ~d winged screwsareprovidecltoseeurethe F t claJnps which hold tbeinBcbinetsmounting boards A couplingguard and two shaft ~gwrrds are p~

r vided to p~ttheSiudenttrom accidet1talJito~gor~~gwires0l1 rotatshy- shy ing)arts The guardsmiddotare quickly mounted bY insertirig retamer CUpS in~T~9tsin

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The procedure for mou~ting and ioupling the machines to the base is as fon~

L 1 A~just each wing screw 021- ~e two screw clamp hold~ownmiddot ~locks to the top of its threaded stud - 0

i 2 Place each ~chine so that the rear of the base is reSting agairistmiddotthemiddot thd rear clamp on thei L- MGbasemiddot

8 Slide machines iJiboara until ~elrcouplingl1anPs are centered oVer cen~ slots 4 bert rub coupnngmiddotsleevemiddot~toone of the mac1dnes co~pling 1IimgM~ L

5 Slidere~jning machines coupling flange into-the other side of couplbig sleeve 6 Checktobe Sure thatmiddot~e couplhig guard will cOver coupling when insertedmiddotinto one ot thel pails areenter slotsmiddot 7 plaCe front clamp tor each of machines against the front or the two macbiD5t bases

(- s 8 F~pr tighten ~~uts 9it middotthe two screw clamp hold-down biocks Lmiddot 9 Mount coUplini aDd shaft guards by locating appropriate retainer clips in slotS so that coushy

pling is ~der co~Ung guard and ~ sh~ is covered by a ~haft guatdL

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MODIL1-10oaA TRANSFClRfJIER OEMONSTRATOR

GENEijAL The TlOO-8A~~ts of three Single-phase bansformers wit~ m11Jtiple primary and secondary taps terminated atpinreceptacl~on the front of the unit Each of the three ~rOrinersmay beused independen1q Or the threemay~interconmiddot

f nected mseries~1npQmneJ or inmiddot many poJyph8seCbnfigurations

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EacbtraDslormer is~~middot af)vol~amperesat 60 Hertz ~ has two primary~d

two secoDdaqwindiIlBL Each ofthe priD1817 windiD~1tas800 turns of Nobull 24 gauge-wire and JSmiddotm~-120volta 05 amperes Onewhidingis tapped at 82 volts toprovide~~middotS~tttllp~(866$)middot~fthemiddot twomiddotwiDd1np~ 68ri~ Each or thesecondshylQ7middotwindh1pmiddot1uIs100t11rns of No 21 gauge wire and israted 60 volts 10 ampere One winding Js tappbd atmiddotlaquo volts to p~vide a Scott tapor the two windings in series Shownbelow are the voltage ratings orthe various taps for each of the three traDspoundormers

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t bull MODEL middotRLmiddot100AmiddotRESISTANC~LOAD J J- shy~ GENERAL The RL-IOOAfs variable ftsistance unit used to applya resistivel0a4middottogenera

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tors or altemators One unit may be used in single-phase applications ora bank L of tlmae units may be combhled intQ Wye or De1taCOnt1IJDlt1~DS tor three phase

applicmioDS TiieRL-lOOA mttoduces resistieload~ ~sequentild steps r designed to prod11CB approximateiy equal ipcremeJlts otJoadmiddot~tmiddot The SPST f ~ toigle switches are numbered andmiddot must be cloSed in nUD1erl~ordertodecrease

totlreslstance~creasmglOad The total ~cemiddot or the cOb~ected~rs ( may be COmputed f~theequation L

middot 1 1 1-1 ~=R1+Ri+lt8middotmiddotmiddot

The ConowingO equations may be used to detemUne the power disSipated from a measurement of load currentor voltage

L P=EI = = I~

p (ampp) = 8 xEpBPH (tor balanced ioad)

Where P=P~inWatb

E =yoltage inVolfB I = Currentin Amperes

f R =Resistance in Ohms L P(Stp) =middotmiddotTotalPower for Three-Phase

~H ==~ Voltage per Phase~r Load Bankf L bull IpH = Ourrent per Phase ofLoad Bank ampshy

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~ SERIES 100 OPmiddotERATmiddotING INSTRUCTIONS

MODEL RLC-100RESmiddotISTANCE-REACTANmiddotCE LOAD

The RLCl00 ismiddota variable resistance and--reactance- (either ~ductive or capaci- tive) uDit that ~y be used _to apply a singl~plmse or a three-phase load The remstive load (w~ can be ~ for both middotACcd DC) is controDed by siz SPST toggle switches e8ch of which puts 2000 ohlnaof resistance in paraDelmiddot lor all three phases simultaneouslybullThe resistive-load is therefore always balanced The total resistance in eacli ph8se equals 2000- ohms divided by the Dumber of switches closed For example with two sWitehesclosedtbe total resistance-is 1000 ohms rith aUsiZ closed 8888 ohms Each or the three reactance loads (used forAC o~) separateVfused at 1 amp is controlled by a knob that varltlSthe degreeopound lead andmiddot l8g A clockwise rotationof the middotknob applies leadiIlg pOwer factor (cashypaCitive)loid while a counterc1~ rotation appIiesa lagging power factor (inductive) load There is DO lpadapplied whenthe-knob is in mid position

The 8-4-5 right triangle graph below may bemiddot~ to approximate a O~8 power factor leading or lagging

1 Appfi a resistiVe load 2 Readthe in-phase current h from -the ammeter 8 From the lR value on tlie horizontal base of the graph travel vertically to the

point where it intersects the 08 PF (total amps) line 4 Frommiddotthis point travel horizontally to the reactive current wlueIz 5 Adjust the ~ve load until the Ix ammeter reads this value of reactive cur

rent

6 To obtain a ~ced load in a three-phaseconfigaratioD repeat Step -5 for the other two~

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RESISTIVE AMPERES

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middotINDUCTANCEDIAL POSITIONmiddot (~middotQLJNT~RCmiddotLOCKWJSE)

-12 51 Henry

middot11 ~ 57 Henry

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-7 97 HefJry

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-18 33 HenlY

DIAL POSITION CAPACITANCE (CLOCKWISE)

0 69 llF

1 1~57 J1F

2 316 J1F

3 501Jlf

middot4 640J1F

5 80~J1f

6 985 j1f 7 1160middotpF

8 1360J1Fmiddot

9 1609middotJ1F

10 18~JtF

11 2007~middotF

12 2170 fLF

13 2513 )iFmiddot

14 2860J1F

15 3090 pFmiddot

15 3269JlF

17 3539 JlFmiddot (

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SERIES 100OPERATING INSTAUCTIONS L

- -

-

MODJL ACVA-10()ACMETERINGPANEL L GENERAL The HAMPDEN Model ACVA-1OO consistsmiddotol two AC ammetem and one AC voltshy

meterA11 or the meters are dioaeprot8cted against overloads as high 1Ui 1000f

The ~ltmeter islicctt8 within 8 w1UIemiddotthe ammeters are accurate wi~hin ~ plusmn29D ormiddotfWl sCale dellection The middotme~rshave the following ranges

r I AC Voltm~teI Oto l00~OO V~ts ~ AC Amme~ OtlJQ5f2f4l8-Amps

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OPERATION

AC AMMETERS

L 1 Connect the ammeter in series so that the middotentire AC current to be measured passes

I through the ~~ter The test lead from the dark blue middotbindingpostis connected to one

side or the Dne and the test lead trom the Qrange bin~ post to the other ~ L

2 ~e choice or measuring range is iet with the range switch Fourmiddotranges are avaiiable O 05 0204 an~ 0 - 8 amperes

8 Set the rangemiddotswitch on the 8 ampere range Detore turning on the power

a) When ~ to measure motor current put a jumper lead between the tWo binding poststo protect the movement from the large inrushcurrent at start This jumper is

(

removed after the motor has started

--~---~--~_--------~---_~_----ENGINEERfNG CORPORATION

MANUFACTURERSmiddotOF rpUIPMCNT F()R EDUCATION AND INDUSTRY

L POmiddotBoxS63 East Longmeadow MA 01028middot (413) 525-3981 bull TLX 9gt5426 bull Pax (413) S2S-474i

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MODELACWM-1 GO WATIMETER PANEL

GENERAL The1iAMPDEN Model ACWMmiddotI00 consists artwo Iilulti-rangewattmeters and

I tbe~tchesh-lh~r operation Eacli has ~e follOwing ranges l

)to 1~30016~1200W

(150300Volts 2148 Amps)

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OPERATION Measure wattage bymiddotconn8cling a wattmetervoltmeter andmiddot~ete~8sshownin Figtt81 The ~-MPstttOn mustO be~middotconn~middotin series- with the ioad and-the

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VQTS con mUstmiddotbeqo~n~middotiJ1 prU9l1elwith the load protected against overloads by diodes

The Otlrrent~Coils are

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-FIGURE 1 WATTMETER CONNECnONS 14IJ -- -

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Balanced Load

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Each wa~eter has tWomiddot Voltage mtinp (150 and- 800V)~ Rotating the range -switclirounterciOCkwise from OFF engages the 150 volt range Rotatmg the _range SWitch clOQkwise from O~ engages the 800 volt range Utilize the Voltmeters readiDg to determine the approprlllte-range

Each wattmetermiddot has three currentmiddot ratings (2 4 and SA) Rotating the range swiJchfrom middotO~engages the Samprarigefbst ~ the wattm~termiddotreadsbelow ~r 8Cll18 and the ammeter indicates that the 4 amp rating will not be ~e9 ~ectmiddotthe 4 ainp range-middot If the mttnie~ again reads below balt scaie and the ammeterindicates that the 2 amp rating will no~ bemiddot exceeded the 2 amp range may bese1ectedI

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L FIGURE 2 WATTMETER CONNECTIONS 3fi1

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L middot The totalwatbge is the sum of the two meter readings PI and P2

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two ~eterS VlLL~PT be the same except at 1D1ity power factor middot -shy

When the power factor of the circuit is less than 509b the pointer of meter PI will reverse~ To obtain total wattage in this case reverse the current connections to metet Pl -then subtract the rea~g ormeter PI from that of meter P2

The twO-wattmeter~method cannot be used with as-phase 4-wire load Three wattmeters are ~ in that case

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POWER FACTOR i f ~

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L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

J be calca1ated -from-the -following_equation0

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tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

wherep2 repr~ts th~~ier~thetwoWl1ttiJ1~ re~ingswhentbepower faeto~l~other thaD uPity

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MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

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DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

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b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

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1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

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a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

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DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

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MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

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OPEBATIONTouSe the powermiddotpanelt (lISt tum ON ~MAIN AC circuit breaker~i This will m~tethemain AC pnot Hght and 9nergize the four-pin ~Pyen~i supplying fix~208120VAOtliree-phase poWer Th~ other 1ixed~d~Je sulpHes may

l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

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JL ting the circuitmiddotl~~em

A pindiilg ~ groun4 oenn~oDis proVided at each end or the panel fOrgrounding the rotating macbin~

ENGINEERING CORPORATION -----MANUFACTURERS OF eciuaPMENT R)R EOUCAT1ON AND INDUSTRV bull

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Page 13: [1 Table D. - UTKweb.eecs.utk.edu/~jsl/ECE325/ECE325-LabManual.pdfLab #2 Load-Speed Characteristic of a DC Motor . Objective . The objective of . this . lab is to . detennine the load-speed

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calculate the parameters ofan inductionmotorequivalent circUi~ and to compare the calculated values with measured values L

Pre-La))

(

1 What are the two typeS ofrotOis used mAC inductlonmotorsl t 2 Give theequation for SYDchrono~ speed What is the synhronous speed for a four pole AC ~

L ~d-qctiltgtn~bine (standacent ~efrecFJe~) 3 Define slip for an induction motor If thesynchronous speed is 1800 RPM and the slip (s) is

L 001 what is the rotor speed Ifs == 011 -

l bull 4 Draw a power flow diagram for an AC induction ~otor

5~ middotmiddotDrawatorque VS~ sp~d curve for ail ACinduction motor What is the torqu~ prodnced at synchronous speed (Ns)

6 DescnDemiddot~ no-load test and the blocked rotor ~t for an induction motor Whatis the value ofslip for a Blocked ~otor Test

7 Draw the lEEE-recommended equivalent circuit~ shyL

Calculations C l

l Given the follow~g test results

fLj No-load test Line voltage= 210 V

Linecuxrent iO77 A

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Iiiputpower = 52 W L

I - Blocked-rotor test Line voltage ~ 60V shy tinecu1rent 17 AJ - shy

Input power == 100 W

Also given stator r~tance (Rl) =53 Wphase DL synchronous speed (COsyn) =1885 radlsec

L (R~ember that you are worldngwith a 3-phase machine)

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1 Calculate the parameters of the lEEE-~~ended equivalent circuit 2 Calculate the induction motornopad rotational Io~ 3 CalculateI2t I1t PF Fin Ptiutt Eff and ToutfQrslip v~ues fa11ging from 0 to O~l (with

L step siZe 001) (Pont =Pmech - Prot and Tout = Tmechgt

3 ~lot outputtorque versus speed ~ 4 Plot power factof versusoutput powe~ 5 piot AC)ine current versus outpu~power

i 6 it Plot efficiency versus outPut pow~ shy

LabormiddotatorY Exercise LabgratolY Setup

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L 1 S~tUP middottheOC machine as a sep~te1y excited generator with variableresistance load bank andthe wo~drotot motor as an indu~on motor to drivemiddotthe DC generator (Connect the

indu~Otimotorstatotwindirigsfu a delta confi8uration) This is shown in the Lab 3 Wiring Diagrallt ~

3 CQ~tXtawattmetet to measure power into the itlductionmotor 4 CoDnectDC meters tomeasure DC generator ~nniDalvoltage and armature current 5 Connect AC ~terStOmeasweline to neutral voltage and line current

j 1

- Laboratoxy Me~ments

J 1 Mechanically conple the induction motor to the DC generator-

2 Bring the 3-phase AC voltage to 120V (line to n~tral) ~ I

i 3 Whenmiddotthe induction mot-or is running (around 1783 RPM) bring the nmiddotc machine terminal ~ ~ ~oi~ uP to 125 V middot

4 ~~centfu~ucti~n m~tofv~ues offOtor sp~ed regt vol~age1inetoneutral (Vt(l-n) line CUlTent t shy bull bull bull bullbullbull ~ bull t bull bull bull bulll

(lOt andp~~rofone_p~e (WI)bull middot 5 RCCC~d DC generator values values ofvoltage at terminal (VVand armature current (Ia)

6 First take a set ofmeasurements with all the resistance switches off 1 middotTheD continuerecordingmiddotas theJoad is increased up to ACmiddotllne current of 15 A Do not

exceedthis currentlimitl1

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CalctilationS

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~ 1 Calculate values for Pin Pout PF Eff~ atidTout

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l PF= WI (Vt(l-n) II)

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L Tout= Pout6012nN

f 2 Plot ()utput torgue versus speed ( L- 3 Plotp01l-er fa~torve~u~middot outp~tpoer

4 Plot AC line current v~~outputpower f 5~i Plot~fficl~ncy verSusoutputPQwer L 6 Con1p~ethe ~resu1ts wi~thecalcu1ated results 7 CommeIJton the wisdom ofbuying an indu~on motor having a signijican~ygreaterporse i L power ra~g than iSrequiiedmiddot to dothejob~

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Lab 3 Wiring Diagram

PONERPANa

0 0 0 0 0 120VAC ~laquoNAD4O-4W 12OVoAC MAINC PAl bull o-1atNDC - SEC PAL bull 00121VDC bull SEC 12OVAC

0 ~ 0 0 GJ EJ []] 0 GJ ~ 0 ~ 0

A 8 C N + 0000 00 Q

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La) 4 Synchronous Motor

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L Objective

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L The objective of ~ lab is tomiddotexamine the terminal characteristics ofa synchronous motor under - I08(fand no-load conditions

i L

Pre-Lab

i - L 1 Whatisan important feature ofsynchronous motors

~ Dra~ariequivalentcircuit modetfor a synclnypousmotor ShowEf Xs Ra Iat~Vt If and

the fiel~winding 3 Descripe the open-eircuit test ~t is measured What is varied Sketch the circuit 4 Descn1le the short-circuit test Mat is measured What is varied Sketch the circuit 5 Sketehatt open~ircuit ch8rac~riStic aDd a short-circuit charac~eriStic Show Ia (rated) Vt

(rated) a11da modified airgaplineL

Laboratory Exercise f Part A L

The open-circuit and short-circuit tests will be performed to determine values f~r Xs and ~using

LI

the synchronous machine as a generator

Procedure

1 ~ Connect the DC machine as a selfexcited shunt generator 88 shown in Lab 4 Part A ~g

diagram

2 ~ Couple the DC machine to the syn6~nous machine f 3 Set the 0-125 VDCbob to zeromiddot L

4 Set the 0-150 VDC kn~b to zero 5 Set the synchron~us mac~e to INn START e

6 Bring the DC~cbine terminal voltage up to 125 Vt and adjust the field rheostat to obtain a speed of 1800~M

7 Set the sYnchronous machine to SYNCH RUN 8 Perform the open-circuit test With the synchronous machines terminals open measure the

( voltage across the windings (V00) as field current (If) in increased Increase the field current t - by increasing the DC voltage across the field winding Vary If from 0 to lA in increments of

l 9 OlA Set If to zero

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10 Perform the short-circuit test Short the ph~ windings of the synchronous machine and put

i i an ammeter in series with the shorted windings Measuremiddotthe average windingcurrent (Isc) as L

If in increased V~If from 0 to lA in increments ofOlA ( t

i L- Calculations

1 4~middotVt = Voc =120middotVcaJ~ulatcentmiddotXs and K(Xs =Voc IIsc andK= Voc I If)

2 P16tIIalvs If~(IIal =1Vt--KIf) I Xsi ) t L Part Bmiddot L The annatuIecurrentwill be measured agfield current is varied under loadmiddot and no loadconc1itions

L-

-

1 Connectfh~sySte~ as sbownin the Lab 4 Part Bwiring diagram but do not couple the syn~~riq~-~tiinetothe DC machine~

2 Senhe~chronousmac~to lND STARr 3 Thin tbe6-1S0vnpknobto position cO5~

4 TumODmailtpoiVer

( S S~ the synclnpnbusmachine tq ~YNCH RUN The motor speed should be 1800 RPM L 6 MeasureIa andItas If is varief1 up to lA

Load Procedure shy

1 TUm offmain power 2 Mechanically couplethe synchronous machine to the DC ~hine

3 Set~~ first nine switches of the resistance load to ON ) 4 Setthe-~chrononsmachine to lND START L

5 Turno~middot-m~~wer

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1~ 6 Tuni the~o-lS0VDCknob to position 20bull

~ 7 Settheo-l25VDCknobtoposition pound9 tbull

8 Set the synchronous machine to SYNCH RUN The motor speed should be at 1800 RPM 9bull Measure Ia and Ifas Ifis varied up to lA

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Calculations L

1 Plot Ia V8 If for load and no load conditions and compare with c~cu1ated graph

2 Is there a best~fieldcurrent at which the synchronous machine should be operated

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Lab 4 ~art A Wiring Diagram

POWER PANEL

middot0 0 o o PAl bull Ql25VOC bull sec 120VAC120VAO 0--240114OVACJJ44W 120VAC

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MODEL WRM-100-3A WOUND-ROTOR MOTOR

GENERAL The WRY-100-SA is a three-phase four pole wound-rotor motorconsisting of a stator winding and a rotor winding withldip rings and brushes A three-pole

~ circuit breaker ~ also provided in the termm81 box The nominal ratings of the motor ari~ circuit breaker are listed below r

1 J l-- SPECIFICATIONS MOTORL

WmdingTypeshy Wound Btafor amp Rotor Horsepower shy 13HP Speed shy 175QRPM Voltage bull 20SV bull Sf Amiddot or 860V-s+Y

I Frequency- 60Hz L- Rating Continuous

Full Load Current bull 17 Amps

CIRCUIT BREAKER

Type of Operator bull Rocker Switch L No of PoleS bull Three

Overload )pe bull Thermal Trip Rating shy 2DAmpS Reset Method - middotOW- to Reset

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in Figure L Rotate the Wound Rotor Speed Control ~b to the maximum resisshytance fttn~ counterclockwise direction With all th~ ~ce in the rotor cir middotcai~ the motor-willdevelop maxirilum starting torque and minimum ~g curshy

rent Pwih up the rocker switch on the circuit breaker~ startmiddottqemotorbull The motor will accelerateup to speed The rheostat providesthe mSansofv~g theL motors lQieedtorque characteristicS The effect of the rlieostat increUes with increasing load onthe motorr ~

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ENGfNEERING CORPORATION ------- MANUFACTURERS 01= EQUIPMENT lOR EDUCATION AND INDUSTlY

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GENERAL

SPECIFICATIONS

middotMODEL SMmiddot100middot3ASYNCHRONOUS MACHINE

ThemiddotSMmiddotI00-8A is a three-phase four-pole machine consisting of a wyedel~ stashytor andmiddot 8 quadrature rotor having a DC field winding and a damper winding A three-pole circUit breaker and a IND START-BYNC RUN switch are provided in the terminal OOx- RatingS fonow

SM-100-3A MOTOR ampALTERNATOR

Speed - 1800 RPM Voltagemiddot Max Ambient Temp Insulation bull Rating bull

CIRCUIT BREAKER

Type of~tor shyNo ofPoles bull Overload Type bull Trip Rating bull Reset Methoa shy

ALTERNATOR

Power-Load Current bull Fielti Excitation shy

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208120V-B+-4W 4~ (1047) ClassmiddotB Continuous

Rocker Three Thermal L7amps

middot middotOFF to Reset

250 watts 07 amp (nominal) Separate L6 amps

18 HP 17 Amps 60Hz

ENGINEERING COAPORATION --~-MANUf~RpoundRS~ EQUIPMENT lOR EDUCATION ANO INDUSTRY

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OPERATION Th~ proper connections tor operation of th~ SMl00-SA ~ a ~clttonous (SYNCHRONOUS motor are shown in Figure middot1 With ~ ~tebin the SYNC RUNposiliou MOTOR) ~ze the vari~ble DC supply and adjusttbe~tput voltage from zero up to

th~ value which eauses 1 amp to flow through the rotor ~turn the switch to the lNDSTART PO$ition middotand Start the motor by toggling~becircuit breaker to

the ONposltion WJten the motor reaches DO lQad 1ij)eeC1 move the switch to the SYNC RUN posItion The rotor will then sYnchronize with the nn~ and fJ1e motor wiD be ti1mrlng at exactly 1800 RPvL Used to demonstrate the Wrious ~tics of synclirOnous motors

+VARIABlpound DC

_sUPPLY

STATOR ROTOR middotL1middot 11 A~~-eJ-----CJ

middot AC u l 12

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ct-O--ltr

VARIABLE + DC SUPPLY

FIGURE 1 SM-10o-3A AS A SYNCHRONOUS MoioR

ABC AC SUPPLY INPUT

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OPERATION The proper ampinn~~ fo~ operation or the SM-l00-SA as an alternator are ALTERNATOR) shown in Fi8Ure ~ With tliese connections made and the switch in the SYNCL RUNposition drive the alternator at 1800 RPM With a sUitable prime mover

Energize the DC Voltage supply and increase thesupplys output to bicrease f themiddotslternatorts output voltage to the desired value Toggle the circuit breaker ~L ~ tlie ON pPSition to connect the alternators output to the load Used to

middotdemonstrate the characteristics of a polyphase alternator of the stationary arshyr mature typebull ~t may also be used asthe loading device when testing the varishyI oUsmotom- shy

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OUTPUT

rmiddot~ FIGURE 2 L SM-10o-3A AS AN ALTERNATOR

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SERJES100 OPERATING INStRUCTIONS

oMOoDEL DMmiddot1 DDA DC MACHINE

GENERAL The DY-10OA is amiddot two-pole compound-wound machine ~g of a shunt field a series field and an armature winding A shunt fie1dmiddotr~t and two-pole startel switM are also provided in the-terminal box ~tings follow

SPECIFICAnONS

MACHINE

Shunt Field Ex SepO5A 125V Insulation CJass F middotMax Ambient Temp 40 ~C (104 OF) Rating Continl101iS Speed 1800 RPM nominal Shunt Series Compound wo~dJl1Otcr

125V SOAt 18 HP Shunt Series Compound wound generator

RHEOSTAT

Resistance Power Current middot Taper Fuse Minimum Resistance Position

STARTER

Type of Operator No of Poles Overload Type Trip Rating middot Reset Method

125V 2A 250KW

800~Ohms

100 Watts O575middotAmps Lin ear 1A SJo Blo

Toggle Two Thermal 4lAmps Push Toggle down

ENGI-NEERING CORPORATION ----MANUFACTURERS OF eoulPUEHT FOR EDUCATION ANOINOUSTRY

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L FUNCTION The primDrJ function or the DC motor is to demonstrate the characteristics of

shunt series ancl compOund motors~ It IIl8Y also bemiddotutiHzed as a prime mover when testiJlg a gel1eraloror alternator Using the DCmiddotmotor tor this PurPose has the advantage th~tbe speed may be held constant bymiddot8djusting tJie shunt field rheostat after each load step is applied

L OPERATION The -proper connections for operation as a ClUDulative compound DC motor are

(DC MOTOR) shOWDin Fipre i Withmiddot theseoonndionS made the motor may be started by moving the starter switch toggle up to the ON position It is good praetioe to stad the motor with the shunt field rh~ in its minimum resistance fully COW position to provide m8amum starting torque andmiDitnum starting Curshy

L rent The motor may then be adjusted ~ the desired speed byadjUBtingtbe field rheostat or varying the line voltage

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1 125VDO SUPPLY

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FUNCTION The DC generator is p~arily utili2ed to demonstrate the characteristics of shunt series ~dCOinpound gen~tors It is~ alsOusedastlle loading device

when testing the vari~us motors

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OPERATION The~CODnections tor operation as a cmnulative C()~po1l1ld nCgenshyeratorareshown in Figure 2 With these connectio~middotmiddotDltldeJ drive theJDCmiddotGENERATOR gen~-atapproxhnately1800RPM with a suitable p~e moVer With thefie1qrheostatJnits Jll8Ximum resistance fullyc1ocm~ position enshyergiZe thel15V DC field supply Rotate the field rheostatinthecltunter

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resistance load

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OUTPUT

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MODEL MGmiddotBmiddot100DG BEDPLATE f

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The MG Bedplateconsists of a heayy s~ baBe n10~~middotmiddoton vibration pads The

I - GENERAL

function otthe bedplate is toe~le the quickmounting ~dcoup1mg of the two individ~ macbiDoes to form a completemiddotmiddotm~ior-Pnerator setpwothreaded hpldshy

~ down)1Ocks ~d winged screwsareprovidecltoseeurethe F t claJnps which hold tbeinBcbinetsmounting boards A couplingguard and two shaft ~gwrrds are p~

r vided to p~ttheSiudenttrom accidet1talJito~gor~~gwires0l1 rotatshy- shy ing)arts The guardsmiddotare quickly mounted bY insertirig retamer CUpS in~T~9tsin

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The procedure for mou~ting and ioupling the machines to the base is as fon~

L 1 A~just each wing screw 021- ~e two screw clamp hold~ownmiddot ~locks to the top of its threaded stud - 0

i 2 Place each ~chine so that the rear of the base is reSting agairistmiddotthemiddot thd rear clamp on thei L- MGbasemiddot

8 Slide machines iJiboara until ~elrcouplingl1anPs are centered oVer cen~ slots 4 bert rub coupnngmiddotsleevemiddot~toone of the mac1dnes co~pling 1IimgM~ L

5 Slidere~jning machines coupling flange into-the other side of couplbig sleeve 6 Checktobe Sure thatmiddot~e couplhig guard will cOver coupling when insertedmiddotinto one ot thel pails areenter slotsmiddot 7 plaCe front clamp tor each of machines against the front or the two macbiD5t bases

(- s 8 F~pr tighten ~~uts 9it middotthe two screw clamp hold-down biocks Lmiddot 9 Mount coUplini aDd shaft guards by locating appropriate retainer clips in slotS so that coushy

pling is ~der co~Ung guard and ~ sh~ is covered by a ~haft guatdL

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MODIL1-10oaA TRANSFClRfJIER OEMONSTRATOR

GENEijAL The TlOO-8A~~ts of three Single-phase bansformers wit~ m11Jtiple primary and secondary taps terminated atpinreceptacl~on the front of the unit Each of the three ~rOrinersmay beused independen1q Or the threemay~interconmiddot

f nected mseries~1npQmneJ or inmiddot many poJyph8seCbnfigurations

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EacbtraDslormer is~~middot af)vol~amperesat 60 Hertz ~ has two primary~d

two secoDdaqwindiIlBL Each ofthe priD1817 windiD~1tas800 turns of Nobull 24 gauge-wire and JSmiddotm~-120volta 05 amperes Onewhidingis tapped at 82 volts toprovide~~middotS~tttllp~(866$)middot~fthemiddot twomiddotwiDd1np~ 68ri~ Each or thesecondshylQ7middotwindh1pmiddot1uIs100t11rns of No 21 gauge wire and israted 60 volts 10 ampere One winding Js tappbd atmiddotlaquo volts to p~vide a Scott tapor the two windings in series Shownbelow are the voltage ratings orthe various taps for each of the three traDspoundormers

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t bull MODEL middotRLmiddot100AmiddotRESISTANC~LOAD J J- shy~ GENERAL The RL-IOOAfs variable ftsistance unit used to applya resistivel0a4middottogenera

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tors or altemators One unit may be used in single-phase applications ora bank L of tlmae units may be combhled intQ Wye or De1taCOnt1IJDlt1~DS tor three phase

applicmioDS TiieRL-lOOA mttoduces resistieload~ ~sequentild steps r designed to prod11CB approximateiy equal ipcremeJlts otJoadmiddot~tmiddot The SPST f ~ toigle switches are numbered andmiddot must be cloSed in nUD1erl~ordertodecrease

totlreslstance~creasmglOad The total ~cemiddot or the cOb~ected~rs ( may be COmputed f~theequation L

middot 1 1 1-1 ~=R1+Ri+lt8middotmiddotmiddot

The ConowingO equations may be used to detemUne the power disSipated from a measurement of load currentor voltage

L P=EI = = I~

p (ampp) = 8 xEpBPH (tor balanced ioad)

Where P=P~inWatb

E =yoltage inVolfB I = Currentin Amperes

f R =Resistance in Ohms L P(Stp) =middotmiddotTotalPower for Three-Phase

~H ==~ Voltage per Phase~r Load Bankf L bull IpH = Ourrent per Phase ofLoad Bank ampshy

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~ SERIES 100 OPmiddotERATmiddotING INSTRUCTIONS

MODEL RLC-100RESmiddotISTANCE-REACTANmiddotCE LOAD

The RLCl00 ismiddota variable resistance and--reactance- (either ~ductive or capaci- tive) uDit that ~y be used _to apply a singl~plmse or a three-phase load The remstive load (w~ can be ~ for both middotACcd DC) is controDed by siz SPST toggle switches e8ch of which puts 2000 ohlnaof resistance in paraDelmiddot lor all three phases simultaneouslybullThe resistive-load is therefore always balanced The total resistance in eacli ph8se equals 2000- ohms divided by the Dumber of switches closed For example with two sWitehesclosedtbe total resistance-is 1000 ohms rith aUsiZ closed 8888 ohms Each or the three reactance loads (used forAC o~) separateVfused at 1 amp is controlled by a knob that varltlSthe degreeopound lead andmiddot l8g A clockwise rotationof the middotknob applies leadiIlg pOwer factor (cashypaCitive)loid while a counterc1~ rotation appIiesa lagging power factor (inductive) load There is DO lpadapplied whenthe-knob is in mid position

The 8-4-5 right triangle graph below may bemiddot~ to approximate a O~8 power factor leading or lagging

1 Appfi a resistiVe load 2 Readthe in-phase current h from -the ammeter 8 From the lR value on tlie horizontal base of the graph travel vertically to the

point where it intersects the 08 PF (total amps) line 4 Frommiddotthis point travel horizontally to the reactive current wlueIz 5 Adjust the ~ve load until the Ix ammeter reads this value of reactive cur

rent

6 To obtain a ~ced load in a three-phaseconfigaratioD repeat Step -5 for the other two~

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-17 35 Henry

-13 47 Henry

middotINDUCTANCEDIAL POSITIONmiddot (~middotQLJNT~RCmiddotLOCKWJSE)

-12 51 Henry

middot11 ~ 57 Henry

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-15 ~41middotmiddotHQIllY

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-7 97 HefJry

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DIAL POSITION CAPACITANCE (CLOCKWISE)

0 69 llF

1 1~57 J1F

2 316 J1F

3 501Jlf

middot4 640J1F

5 80~J1f

6 985 j1f 7 1160middotpF

8 1360J1Fmiddot

9 1609middotJ1F

10 18~JtF

11 2007~middotF

12 2170 fLF

13 2513 )iFmiddot

14 2860J1F

15 3090 pFmiddot

15 3269JlF

17 3539 JlFmiddot (

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SERIES 100OPERATING INSTAUCTIONS L

- -

-

MODJL ACVA-10()ACMETERINGPANEL L GENERAL The HAMPDEN Model ACVA-1OO consistsmiddotol two AC ammetem and one AC voltshy

meterA11 or the meters are dioaeprot8cted against overloads as high 1Ui 1000f

The ~ltmeter islicctt8 within 8 w1UIemiddotthe ammeters are accurate wi~hin ~ plusmn29D ormiddotfWl sCale dellection The middotme~rshave the following ranges

r I AC Voltm~teI Oto l00~OO V~ts ~ AC Amme~ OtlJQ5f2f4l8-Amps

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OPERATION

AC AMMETERS

L 1 Connect the ammeter in series so that the middotentire AC current to be measured passes

I through the ~~ter The test lead from the dark blue middotbindingpostis connected to one

side or the Dne and the test lead trom the Qrange bin~ post to the other ~ L

2 ~e choice or measuring range is iet with the range switch Fourmiddotranges are avaiiable O 05 0204 an~ 0 - 8 amperes

8 Set the rangemiddotswitch on the 8 ampere range Detore turning on the power

a) When ~ to measure motor current put a jumper lead between the tWo binding poststo protect the movement from the large inrushcurrent at start This jumper is

(

removed after the motor has started

--~---~--~_--------~---_~_----ENGINEERfNG CORPORATION

MANUFACTURERSmiddotOF rpUIPMCNT F()R EDUCATION AND INDUSTRY

L POmiddotBoxS63 East Longmeadow MA 01028middot (413) 525-3981 bull TLX 9gt5426 bull Pax (413) S2S-474i

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MODELACWM-1 GO WATIMETER PANEL

GENERAL The1iAMPDEN Model ACWMmiddotI00 consists artwo Iilulti-rangewattmeters and

I tbe~tchesh-lh~r operation Eacli has ~e follOwing ranges l

)to 1~30016~1200W

(150300Volts 2148 Amps)

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OPERATION Measure wattage bymiddotconn8cling a wattmetervoltmeter andmiddot~ete~8sshownin Figtt81 The ~-MPstttOn mustO be~middotconn~middotin series- with the ioad and-the

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VQTS con mUstmiddotbeqo~n~middotiJ1 prU9l1elwith the load protected against overloads by diodes

The Otlrrent~Coils are

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-FIGURE 1 WATTMETER CONNECnONS 14IJ -- -

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Balanced Load

F-4 Cent

Each wa~eter has tWomiddot Voltage mtinp (150 and- 800V)~ Rotating the range -switclirounterciOCkwise from OFF engages the 150 volt range Rotatmg the _range SWitch clOQkwise from O~ engages the 800 volt range Utilize the Voltmeters readiDg to determine the approprlllte-range

Each wattmetermiddot has three currentmiddot ratings (2 4 and SA) Rotating the range swiJchfrom middotO~engages the Samprarigefbst ~ the wattm~termiddotreadsbelow ~r 8Cll18 and the ammeter indicates that the 4 amp rating will not be ~e9 ~ectmiddotthe 4 ainp range-middot If the mttnie~ again reads below balt scaie and the ammeterindicates that the 2 amp rating will no~ bemiddot exceeded the 2 amp range may bese1ectedI

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L FIGURE 2 WATTMETER CONNECTIONS 3fi1

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L middot The totalwatbge is the sum of the two meter readings PI and P2

f When pow~ in a ~ced load is m~ured in this ~er the indication or the 1

two ~eterS VlLL~PT be the same except at 1D1ity power factor middot -shy

When the power factor of the circuit is less than 509b the pointer of meter PI will reverse~ To obtain total wattage in this case reverse the current connections to metet Pl -then subtract the rea~g ormeter PI from that of meter P2

The twO-wattmeter~method cannot be used with as-phase 4-wire load Three wattmeters are ~ in that case

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POWER FACTOR i f ~

Given a balallCed load the~oWer tacentor middoteanbe -d~emiined from the two wattmeter mth6cL - ~

L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

J be calca1ated -from-the -following_equation0

J ~

tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

wherep2 repr~ts th~~ier~thetwoWl1ttiJ1~ re~ingswhentbepower faeto~l~other thaD uPity

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BiDet th~powertaetb~ 8q1alsthcosme ofthephaseangletP~powerfactor may also be I deterJninedfromtheratioo~thetwo wittmeterreadings middotmiddotThegraph b~ow shows the1 I

I relationship between themiddotpowerfacior andth~ratio~f P1lP2 ~

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MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

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DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

L shy6IfIamp_0 middotEN G I NmiddotEmiddotEmiddotR ING COR PO RmiddotATi ()N

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agt If the currePtis~ter than 5 amperes the needlewDI move off-scale TuRN OFF POVER IMliEDIATELY AJf exception to this may be on motor starling Momenshytary current inrushbullmay exceed 5 ampe~ but theneedleiminediately drops back to normal

b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

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1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

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a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

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ENGINEERINGo 90RPORATION -----MANUFAeTURtRS OF poundQUIPMpoundNT lOR EDUCATION ANO INDUSTfty

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MODEL-1723 rACHoME~R

DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

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MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

L bull Fieci120VAC 15A~u~tWod~plex receptacles bull ~12OVAC single-pJiase2-~lOA bull FiX~208120VAC~phase 4-wire15A bull VariabJe 0 ~ 24oI14QVAC8-~i~~9A

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OPEBATIONTouSe the powermiddotpanelt (lISt tum ON ~MAIN AC circuit breaker~i This will m~tethemain AC pnot Hght and 9nergize the four-pin ~Pyen~i supplying fix~208120VAOtliree-phase poWer Th~ other 1ixed~d~Je sulpHes may

l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

cuit ~~ (both ~ ~ncl BEc) A clockwise lOtation of the vol~cpntro1 -- ~ ~eause ~~~~the voltage a~ble at the appropriate 1~Ptashy

L I tNOTE ~~ ~~ltage oo~~lbob fOr the 0-208120V three-phase sUpply is ~ted at the ~nd or the

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IfanY~r~es11PplifSri-e~vefloaded one or more circuit breakers may trip middotOFF Al- ir ways turnthemiddotVariable suppllesto zero and remove the C8usaopound the oyerload before resetshy

JL ting the circuitmiddotl~~em

A pindiilg ~ groun4 oenn~oDis proVided at each end or the panel fOrgrounding the rotating macbin~

ENGINEERING CORPORATION -----MANUFACTURERS OF eciuaPMENT R)R EOUCAT1ON AND INDUSTRV bull

PO Box 563 East ~ow IdA 91028 (413) S25-S9ff1 bull nx 95-5426 bull Fax (41~) S2S-4141

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Page 14: [1 Table D. - UTKweb.eecs.utk.edu/~jsl/ECE325/ECE325-LabManual.pdfLab #2 Load-Speed Characteristic of a DC Motor . Objective . The objective of . this . lab is to . detennine the load-speed

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1 Calculate the parameters of the lEEE-~~ended equivalent circuit 2 Calculate the induction motornopad rotational Io~ 3 CalculateI2t I1t PF Fin Ptiutt Eff and ToutfQrslip v~ues fa11ging from 0 to O~l (with

L step siZe 001) (Pont =Pmech - Prot and Tout = Tmechgt

3 ~lot outputtorque versus speed ~ 4 Plot power factof versusoutput powe~ 5 piot AC)ine current versus outpu~power

i 6 it Plot efficiency versus outPut pow~ shy

LabormiddotatorY Exercise LabgratolY Setup

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L 1 S~tUP middottheOC machine as a sep~te1y excited generator with variableresistance load bank andthe wo~drotot motor as an indu~on motor to drivemiddotthe DC generator (Connect the

indu~Otimotorstatotwindirigsfu a delta confi8uration) This is shown in the Lab 3 Wiring Diagrallt ~

3 CQ~tXtawattmetet to measure power into the itlductionmotor 4 CoDnectDC meters tomeasure DC generator ~nniDalvoltage and armature current 5 Connect AC ~terStOmeasweline to neutral voltage and line current

j 1

- Laboratoxy Me~ments

J 1 Mechanically conple the induction motor to the DC generator-

2 Bring the 3-phase AC voltage to 120V (line to n~tral) ~ I

i 3 Whenmiddotthe induction mot-or is running (around 1783 RPM) bring the nmiddotc machine terminal ~ ~ ~oi~ uP to 125 V middot

4 ~~centfu~ucti~n m~tofv~ues offOtor sp~ed regt vol~age1inetoneutral (Vt(l-n) line CUlTent t shy bull bull bull bullbullbull ~ bull t bull bull bull bulll

(lOt andp~~rofone_p~e (WI)bull middot 5 RCCC~d DC generator values values ofvoltage at terminal (VVand armature current (Ia)

6 First take a set ofmeasurements with all the resistance switches off 1 middotTheD continuerecordingmiddotas theJoad is increased up to ACmiddotllne current of 15 A Do not

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CalctilationS

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~ 1 Calculate values for Pin Pout PF Eff~ atidTout

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l PF= WI (Vt(l-n) II)

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f 2 Plot ()utput torgue versus speed ( L- 3 Plotp01l-er fa~torve~u~middot outp~tpoer

4 Plot AC line current v~~outputpower f 5~i Plot~fficl~ncy verSusoutputPQwer L 6 Con1p~ethe ~resu1ts wi~thecalcu1ated results 7 CommeIJton the wisdom ofbuying an indu~on motor having a signijican~ygreaterporse i L power ra~g than iSrequiiedmiddot to dothejob~

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Lab 3 Wiring Diagram

PONERPANa

0 0 0 0 0 120VAC ~laquoNAD4O-4W 12OVoAC MAINC PAl bull o-1atNDC - SEC PAL bull 00121VDC bull SEC 12OVAC

0 ~ 0 0 GJ EJ []] 0 GJ ~ 0 ~ 0

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La) 4 Synchronous Motor

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L Objective

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L The objective of ~ lab is tomiddotexamine the terminal characteristics ofa synchronous motor under - I08(fand no-load conditions

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Pre-Lab

i - L 1 Whatisan important feature ofsynchronous motors

~ Dra~ariequivalentcircuit modetfor a synclnypousmotor ShowEf Xs Ra Iat~Vt If and

the fiel~winding 3 Descripe the open-eircuit test ~t is measured What is varied Sketch the circuit 4 Descn1le the short-circuit test Mat is measured What is varied Sketch the circuit 5 Sketehatt open~ircuit ch8rac~riStic aDd a short-circuit charac~eriStic Show Ia (rated) Vt

(rated) a11da modified airgaplineL

Laboratory Exercise f Part A L

The open-circuit and short-circuit tests will be performed to determine values f~r Xs and ~using

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the synchronous machine as a generator

Procedure

1 ~ Connect the DC machine as a selfexcited shunt generator 88 shown in Lab 4 Part A ~g

diagram

2 ~ Couple the DC machine to the syn6~nous machine f 3 Set the 0-125 VDCbob to zeromiddot L

4 Set the 0-150 VDC kn~b to zero 5 Set the synchron~us mac~e to INn START e

6 Bring the DC~cbine terminal voltage up to 125 Vt and adjust the field rheostat to obtain a speed of 1800~M

7 Set the sYnchronous machine to SYNCH RUN 8 Perform the open-circuit test With the synchronous machines terminals open measure the

( voltage across the windings (V00) as field current (If) in increased Increase the field current t - by increasing the DC voltage across the field winding Vary If from 0 to lA in increments of

l 9 OlA Set If to zero

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10 Perform the short-circuit test Short the ph~ windings of the synchronous machine and put

i i an ammeter in series with the shorted windings Measuremiddotthe average windingcurrent (Isc) as L

If in increased V~If from 0 to lA in increments ofOlA ( t

i L- Calculations

1 4~middotVt = Voc =120middotVcaJ~ulatcentmiddotXs and K(Xs =Voc IIsc andK= Voc I If)

2 P16tIIalvs If~(IIal =1Vt--KIf) I Xsi ) t L Part Bmiddot L The annatuIecurrentwill be measured agfield current is varied under loadmiddot and no loadconc1itions

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1 Connectfh~sySte~ as sbownin the Lab 4 Part Bwiring diagram but do not couple the syn~~riq~-~tiinetothe DC machine~

2 Senhe~chronousmac~to lND STARr 3 Thin tbe6-1S0vnpknobto position cO5~

4 TumODmailtpoiVer

( S S~ the synclnpnbusmachine tq ~YNCH RUN The motor speed should be 1800 RPM L 6 MeasureIa andItas If is varief1 up to lA

Load Procedure shy

1 TUm offmain power 2 Mechanically couplethe synchronous machine to the DC ~hine

3 Set~~ first nine switches of the resistance load to ON ) 4 Setthe-~chrononsmachine to lND START L

5 Turno~middot-m~~wer

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1~ 6 Tuni the~o-lS0VDCknob to position 20bull

~ 7 Settheo-l25VDCknobtoposition pound9 tbull

8 Set the synchronous machine to SYNCH RUN The motor speed should be at 1800 RPM 9bull Measure Ia and Ifas Ifis varied up to lA

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Calculations L

1 Plot Ia V8 If for load and no load conditions and compare with c~cu1ated graph

2 Is there a best~fieldcurrent at which the synchronous machine should be operated

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Lab 4 ~art A Wiring Diagram

POWER PANEL

middot0 0 o o PAl bull Ql25VOC bull sec 120VAC120VAO 0--240114OVACJJ44W 120VAC

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SERI~S100 OPERATINGINSTRUCTIONS amp bull ~

MODEL WRM-100-3A WOUND-ROTOR MOTOR

GENERAL The WRY-100-SA is a three-phase four pole wound-rotor motorconsisting of a stator winding and a rotor winding withldip rings and brushes A three-pole

~ circuit breaker ~ also provided in the termm81 box The nominal ratings of the motor ari~ circuit breaker are listed below r

1 J l-- SPECIFICATIONS MOTORL

WmdingTypeshy Wound Btafor amp Rotor Horsepower shy 13HP Speed shy 175QRPM Voltage bull 20SV bull Sf Amiddot or 860V-s+Y

I Frequency- 60Hz L- Rating Continuous

Full Load Current bull 17 Amps

CIRCUIT BREAKER

Type of Operator bull Rocker Switch L No of PoleS bull Three

Overload )pe bull Thermal Trip Rating shy 2DAmpS Reset Method - middotOW- to Reset

r I - shy OPERATION To operatethe ~-l00-SAas an induction motor make the connections shown

in Figure L Rotate the Wound Rotor Speed Control ~b to the maximum resisshytance fttn~ counterclockwise direction With all th~ ~ce in the rotor cir middotcai~ the motor-willdevelop maxirilum starting torque and minimum ~g curshy

rent Pwih up the rocker switch on the circuit breaker~ startmiddottqemotorbull The motor will accelerateup to speed The rheostat providesthe mSansofv~g theL motors lQieedtorque characteristicS The effect of the rlieostat increUes with increasing load onthe motorr ~

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GENERAL

SPECIFICATIONS

middotMODEL SMmiddot100middot3ASYNCHRONOUS MACHINE

ThemiddotSMmiddotI00-8A is a three-phase four-pole machine consisting of a wyedel~ stashytor andmiddot 8 quadrature rotor having a DC field winding and a damper winding A three-pole circUit breaker and a IND START-BYNC RUN switch are provided in the terminal OOx- RatingS fonow

SM-100-3A MOTOR ampALTERNATOR

Speed - 1800 RPM Voltagemiddot Max Ambient Temp Insulation bull Rating bull

CIRCUIT BREAKER

Type of~tor shyNo ofPoles bull Overload Type bull Trip Rating bull Reset Methoa shy

ALTERNATOR

Power-Load Current bull Fielti Excitation shy

MOTOR

HorSepowershyCurrent bull Frequencyshy

208120V-B+-4W 4~ (1047) ClassmiddotB Continuous

Rocker Three Thermal L7amps

middot middotOFF to Reset

250 watts 07 amp (nominal) Separate L6 amps

18 HP 17 Amps 60Hz

ENGINEERING COAPORATION --~-MANUf~RpoundRS~ EQUIPMENT lOR EDUCATION ANO INDUSTRY

Po Box 563 East Lon~~dow~ O~028 (413) 525-3981 bull 1tX95-S426 bull Pax (413) 525-4741

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OPERATION Th~ proper connections tor operation of th~ SMl00-SA ~ a ~clttonous (SYNCHRONOUS motor are shown in Figure middot1 With ~ ~tebin the SYNC RUNposiliou MOTOR) ~ze the vari~ble DC supply and adjusttbe~tput voltage from zero up to

th~ value which eauses 1 amp to flow through the rotor ~turn the switch to the lNDSTART PO$ition middotand Start the motor by toggling~becircuit breaker to

the ONposltion WJten the motor reaches DO lQad 1ij)eeC1 move the switch to the SYNC RUN posItion The rotor will then sYnchronize with the nn~ and fJ1e motor wiD be ti1mrlng at exactly 1800 RPvL Used to demonstrate the Wrious ~tics of synclirOnous motors

+VARIABlpound DC

_sUPPLY

STATOR ROTOR middotL1middot 11 A~~-eJ-----CJ

middot AC u l 12

~~YB~T middotJ3~T3

ct-O--ltr

VARIABLE + DC SUPPLY

FIGURE 1 SM-10o-3A AS A SYNCHRONOUS MoioR

ABC AC SUPPLY INPUT

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OPERATION The proper ampinn~~ fo~ operation or the SM-l00-SA as an alternator are ALTERNATOR) shown in Fi8Ure ~ With tliese connections made and the switch in the SYNCL RUNposition drive the alternator at 1800 RPM With a sUitable prime mover

Energize the DC Voltage supply and increase thesupplys output to bicrease f themiddotslternatorts output voltage to the desired value Toggle the circuit breaker ~L ~ tlie ON pPSition to connect the alternators output to the load Used to

middotdemonstrate the characteristics of a polyphase alternator of the stationary arshyr mature typebull ~t may also be used asthe loading device when testing the varishyI oUsmotom- shy

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rmiddot~ FIGURE 2 L SM-10o-3A AS AN ALTERNATOR

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SERJES100 OPERATING INStRUCTIONS

oMOoDEL DMmiddot1 DDA DC MACHINE

GENERAL The DY-10OA is amiddot two-pole compound-wound machine ~g of a shunt field a series field and an armature winding A shunt fie1dmiddotr~t and two-pole startel switM are also provided in the-terminal box ~tings follow

SPECIFICAnONS

MACHINE

Shunt Field Ex SepO5A 125V Insulation CJass F middotMax Ambient Temp 40 ~C (104 OF) Rating Continl101iS Speed 1800 RPM nominal Shunt Series Compound wo~dJl1Otcr

125V SOAt 18 HP Shunt Series Compound wound generator

RHEOSTAT

Resistance Power Current middot Taper Fuse Minimum Resistance Position

STARTER

Type of Operator No of Poles Overload Type Trip Rating middot Reset Method

125V 2A 250KW

800~Ohms

100 Watts O575middotAmps Lin ear 1A SJo Blo

Toggle Two Thermal 4lAmps Push Toggle down

ENGI-NEERING CORPORATION ----MANUFACTURERS OF eoulPUEHT FOR EDUCATION ANOINOUSTRY

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L FUNCTION The primDrJ function or the DC motor is to demonstrate the characteristics of

shunt series ancl compOund motors~ It IIl8Y also bemiddotutiHzed as a prime mover when testiJlg a gel1eraloror alternator Using the DCmiddotmotor tor this PurPose has the advantage th~tbe speed may be held constant bymiddot8djusting tJie shunt field rheostat after each load step is applied

L OPERATION The -proper connections for operation as a ClUDulative compound DC motor are

(DC MOTOR) shOWDin Fipre i Withmiddot theseoonndionS made the motor may be started by moving the starter switch toggle up to the ON position It is good praetioe to stad the motor with the shunt field rh~ in its minimum resistance fully COW position to provide m8amum starting torque andmiDitnum starting Curshy

L rent The motor may then be adjusted ~ the desired speed byadjUBtingtbe field rheostat or varying the line voltage

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1 125VDO SUPPLY

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FUNCTION The DC generator is p~arily utili2ed to demonstrate the characteristics of shunt series ~dCOinpound gen~tors It is~ alsOusedastlle loading device

when testing the vari~us motors

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OPERATION The~CODnections tor operation as a cmnulative C()~po1l1ld nCgenshyeratorareshown in Figure 2 With these connectio~middotmiddotDltldeJ drive theJDCmiddotGENERATOR gen~-atapproxhnately1800RPM with a suitable p~e moVer With thefie1qrheostatJnits Jll8Ximum resistance fullyc1ocm~ position enshyergiZe thel15V DC field supply Rotate the field rheostatinthecltunter

shy clockwisedir$ctian middottoinCreasemiddot the output voltage middotto the desiredmiddot value Switch Oti~middotthemiddotoverloadmiddot switChmiddotto connect the generators output to the

resistance load

+ 1151 DC - 230 W

OUTPUT

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MODEL MGmiddotBmiddot100DG BEDPLATE f

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The MG Bedplateconsists of a heayy s~ baBe n10~~middotmiddoton vibration pads The

I - GENERAL

function otthe bedplate is toe~le the quickmounting ~dcoup1mg of the two individ~ macbiDoes to form a completemiddotmiddotm~ior-Pnerator setpwothreaded hpldshy

~ down)1Ocks ~d winged screwsareprovidecltoseeurethe F t claJnps which hold tbeinBcbinetsmounting boards A couplingguard and two shaft ~gwrrds are p~

r vided to p~ttheSiudenttrom accidet1talJito~gor~~gwires0l1 rotatshy- shy ing)arts The guardsmiddotare quickly mounted bY insertirig retamer CUpS in~T~9tsin

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The procedure for mou~ting and ioupling the machines to the base is as fon~

L 1 A~just each wing screw 021- ~e two screw clamp hold~ownmiddot ~locks to the top of its threaded stud - 0

i 2 Place each ~chine so that the rear of the base is reSting agairistmiddotthemiddot thd rear clamp on thei L- MGbasemiddot

8 Slide machines iJiboara until ~elrcouplingl1anPs are centered oVer cen~ slots 4 bert rub coupnngmiddotsleevemiddot~toone of the mac1dnes co~pling 1IimgM~ L

5 Slidere~jning machines coupling flange into-the other side of couplbig sleeve 6 Checktobe Sure thatmiddot~e couplhig guard will cOver coupling when insertedmiddotinto one ot thel pails areenter slotsmiddot 7 plaCe front clamp tor each of machines against the front or the two macbiD5t bases

(- s 8 F~pr tighten ~~uts 9it middotthe two screw clamp hold-down biocks Lmiddot 9 Mount coUplini aDd shaft guards by locating appropriate retainer clips in slotS so that coushy

pling is ~der co~Ung guard and ~ sh~ is covered by a ~haft guatdL

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SERIES 100 -OPERATINGINSTRUCTIONS

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MODIL1-10oaA TRANSFClRfJIER OEMONSTRATOR

GENEijAL The TlOO-8A~~ts of three Single-phase bansformers wit~ m11Jtiple primary and secondary taps terminated atpinreceptacl~on the front of the unit Each of the three ~rOrinersmay beused independen1q Or the threemay~interconmiddot

f nected mseries~1npQmneJ or inmiddot many poJyph8seCbnfigurations

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EacbtraDslormer is~~middot af)vol~amperesat 60 Hertz ~ has two primary~d

two secoDdaqwindiIlBL Each ofthe priD1817 windiD~1tas800 turns of Nobull 24 gauge-wire and JSmiddotm~-120volta 05 amperes Onewhidingis tapped at 82 volts toprovide~~middotS~tttllp~(866$)middot~fthemiddot twomiddotwiDd1np~ 68ri~ Each or thesecondshylQ7middotwindh1pmiddot1uIs100t11rns of No 21 gauge wire and israted 60 volts 10 ampere One winding Js tappbd atmiddotlaquo volts to p~vide a Scott tapor the two windings in series Shownbelow are the voltage ratings orthe various taps for each of the three traDspoundormers

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t o 32V 120V 0 120V lI__

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middotSEmiddotRIES 100OPERATING INSTRUCTIONS

t bull MODEL middotRLmiddot100AmiddotRESISTANC~LOAD J J- shy~ GENERAL The RL-IOOAfs variable ftsistance unit used to applya resistivel0a4middottogenera

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tors or altemators One unit may be used in single-phase applications ora bank L of tlmae units may be combhled intQ Wye or De1taCOnt1IJDlt1~DS tor three phase

applicmioDS TiieRL-lOOA mttoduces resistieload~ ~sequentild steps r designed to prod11CB approximateiy equal ipcremeJlts otJoadmiddot~tmiddot The SPST f ~ toigle switches are numbered andmiddot must be cloSed in nUD1erl~ordertodecrease

totlreslstance~creasmglOad The total ~cemiddot or the cOb~ected~rs ( may be COmputed f~theequation L

middot 1 1 1-1 ~=R1+Ri+lt8middotmiddotmiddot

The ConowingO equations may be used to detemUne the power disSipated from a measurement of load currentor voltage

L P=EI = = I~

p (ampp) = 8 xEpBPH (tor balanced ioad)

Where P=P~inWatb

E =yoltage inVolfB I = Currentin Amperes

f R =Resistance in Ohms L P(Stp) =middotmiddotTotalPower for Three-Phase

~H ==~ Voltage per Phase~r Load Bankf L bull IpH = Ourrent per Phase ofLoad Bank ampshy

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FROM AC OR DC SOURCE

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~ SERIES 100 OPmiddotERATmiddotING INSTRUCTIONS

MODEL RLC-100RESmiddotISTANCE-REACTANmiddotCE LOAD

The RLCl00 ismiddota variable resistance and--reactance- (either ~ductive or capaci- tive) uDit that ~y be used _to apply a singl~plmse or a three-phase load The remstive load (w~ can be ~ for both middotACcd DC) is controDed by siz SPST toggle switches e8ch of which puts 2000 ohlnaof resistance in paraDelmiddot lor all three phases simultaneouslybullThe resistive-load is therefore always balanced The total resistance in eacli ph8se equals 2000- ohms divided by the Dumber of switches closed For example with two sWitehesclosedtbe total resistance-is 1000 ohms rith aUsiZ closed 8888 ohms Each or the three reactance loads (used forAC o~) separateVfused at 1 amp is controlled by a knob that varltlSthe degreeopound lead andmiddot l8g A clockwise rotationof the middotknob applies leadiIlg pOwer factor (cashypaCitive)loid while a counterc1~ rotation appIiesa lagging power factor (inductive) load There is DO lpadapplied whenthe-knob is in mid position

The 8-4-5 right triangle graph below may bemiddot~ to approximate a O~8 power factor leading or lagging

1 Appfi a resistiVe load 2 Readthe in-phase current h from -the ammeter 8 From the lR value on tlie horizontal base of the graph travel vertically to the

point where it intersects the 08 PF (total amps) line 4 Frommiddotthis point travel horizontally to the reactive current wlueIz 5 Adjust the ~ve load until the Ix ammeter reads this value of reactive cur

rent

6 To obtain a ~ced load in a three-phaseconfigaratioD repeat Step -5 for the other two~

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-17 35 Henry

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middotINDUCTANCEDIAL POSITIONmiddot (~middotQLJNT~RCmiddotLOCKWJSE)

-12 51 Henry

middot11 ~ 57 Henry

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-5 143H~nrYmiddot

-15 ~41middotmiddotHQIllY

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-7 97 HefJry

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DIAL POSITION CAPACITANCE (CLOCKWISE)

0 69 llF

1 1~57 J1F

2 316 J1F

3 501Jlf

middot4 640J1F

5 80~J1f

6 985 j1f 7 1160middotpF

8 1360J1Fmiddot

9 1609middotJ1F

10 18~JtF

11 2007~middotF

12 2170 fLF

13 2513 )iFmiddot

14 2860J1F

15 3090 pFmiddot

15 3269JlF

17 3539 JlFmiddot (

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SERIES 100OPERATING INSTAUCTIONS L

- -

-

MODJL ACVA-10()ACMETERINGPANEL L GENERAL The HAMPDEN Model ACVA-1OO consistsmiddotol two AC ammetem and one AC voltshy

meterA11 or the meters are dioaeprot8cted against overloads as high 1Ui 1000f

The ~ltmeter islicctt8 within 8 w1UIemiddotthe ammeters are accurate wi~hin ~ plusmn29D ormiddotfWl sCale dellection The middotme~rshave the following ranges

r I AC Voltm~teI Oto l00~OO V~ts ~ AC Amme~ OtlJQ5f2f4l8-Amps

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OPERATION

AC AMMETERS

L 1 Connect the ammeter in series so that the middotentire AC current to be measured passes

I through the ~~ter The test lead from the dark blue middotbindingpostis connected to one

side or the Dne and the test lead trom the Qrange bin~ post to the other ~ L

2 ~e choice or measuring range is iet with the range switch Fourmiddotranges are avaiiable O 05 0204 an~ 0 - 8 amperes

8 Set the rangemiddotswitch on the 8 ampere range Detore turning on the power

a) When ~ to measure motor current put a jumper lead between the tWo binding poststo protect the movement from the large inrushcurrent at start This jumper is

(

removed after the motor has started

--~---~--~_--------~---_~_----ENGINEERfNG CORPORATION

MANUFACTURERSmiddotOF rpUIPMCNT F()R EDUCATION AND INDUSTRY

L POmiddotBoxS63 East Longmeadow MA 01028middot (413) 525-3981 bull TLX 9gt5426 bull Pax (413) S2S-474i

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MODELACWM-1 GO WATIMETER PANEL

GENERAL The1iAMPDEN Model ACWMmiddotI00 consists artwo Iilulti-rangewattmeters and

I tbe~tchesh-lh~r operation Eacli has ~e follOwing ranges l

)to 1~30016~1200W

(150300Volts 2148 Amps)

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OPERATION Measure wattage bymiddotconn8cling a wattmetervoltmeter andmiddot~ete~8sshownin Figtt81 The ~-MPstttOn mustO be~middotconn~middotin series- with the ioad and-the

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VQTS con mUstmiddotbeqo~n~middotiJ1 prU9l1elwith the load protected against overloads by diodes

The Otlrrent~Coils are

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-FIGURE 1 WATTMETER CONNECnONS 14IJ -- -

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Each wa~eter has tWomiddot Voltage mtinp (150 and- 800V)~ Rotating the range -switclirounterciOCkwise from OFF engages the 150 volt range Rotatmg the _range SWitch clOQkwise from O~ engages the 800 volt range Utilize the Voltmeters readiDg to determine the approprlllte-range

Each wattmetermiddot has three currentmiddot ratings (2 4 and SA) Rotating the range swiJchfrom middotO~engages the Samprarigefbst ~ the wattm~termiddotreadsbelow ~r 8Cll18 and the ammeter indicates that the 4 amp rating will not be ~e9 ~ectmiddotthe 4 ainp range-middot If the mttnie~ again reads below balt scaie and the ammeterindicates that the 2 amp rating will no~ bemiddot exceeded the 2 amp range may bese1ectedI

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L FIGURE 2 WATTMETER CONNECTIONS 3fi1

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L middot The totalwatbge is the sum of the two meter readings PI and P2

f When pow~ in a ~ced load is m~ured in this ~er the indication or the 1

two ~eterS VlLL~PT be the same except at 1D1ity power factor middot -shy

When the power factor of the circuit is less than 509b the pointer of meter PI will reverse~ To obtain total wattage in this case reverse the current connections to metet Pl -then subtract the rea~g ormeter PI from that of meter P2

The twO-wattmeter~method cannot be used with as-phase 4-wire load Three wattmeters are ~ in that case

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POWER FACTOR i f ~

Given a balallCed load the~oWer tacentor middoteanbe -d~emiined from the two wattmeter mth6cL - ~

L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

J be calca1ated -from-the -following_equation0

J ~

tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

wherep2 repr~ts th~~ier~thetwoWl1ttiJ1~ re~ingswhentbepower faeto~l~other thaD uPity

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BiDet th~powertaetb~ 8q1alsthcosme ofthephaseangletP~powerfactor may also be I deterJninedfromtheratioo~thetwo wittmeterreadings middotmiddotThegraph b~ow shows the1 I

I relationship between themiddotpowerfacior andth~ratio~f P1lP2 ~

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MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

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L OPERATIONI

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DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

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agt If the currePtis~ter than 5 amperes the needlewDI move off-scale TuRN OFF POVER IMliEDIATELY AJf exception to this may be on motor starling Momenshytary current inrushbullmay exceed 5 ampe~ but theneedleiminediately drops back to normal

b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

L

1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

L

a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

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MODEL-1723 rACHoME~R

DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

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MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

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OPEBATIONTouSe the powermiddotpanelt (lISt tum ON ~MAIN AC circuit breaker~i This will m~tethemain AC pnot Hght and 9nergize the four-pin ~Pyen~i supplying fix~208120VAOtliree-phase poWer Th~ other 1ixed~d~Je sulpHes may

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Page 15: [1 Table D. - UTKweb.eecs.utk.edu/~jsl/ECE325/ECE325-LabManual.pdfLab #2 Load-Speed Characteristic of a DC Motor . Objective . The objective of . this . lab is to . detennine the load-speed

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f 2 Plot ()utput torgue versus speed ( L- 3 Plotp01l-er fa~torve~u~middot outp~tpoer

4 Plot AC line current v~~outputpower f 5~i Plot~fficl~ncy verSusoutputPQwer L 6 Con1p~ethe ~resu1ts wi~thecalcu1ated results 7 CommeIJton the wisdom ofbuying an indu~on motor having a signijican~ygreaterporse i L power ra~g than iSrequiiedmiddot to dothejob~

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Lab 3 Wiring Diagram

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La) 4 Synchronous Motor

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L Objective

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L The objective of ~ lab is tomiddotexamine the terminal characteristics ofa synchronous motor under - I08(fand no-load conditions

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Pre-Lab

i - L 1 Whatisan important feature ofsynchronous motors

~ Dra~ariequivalentcircuit modetfor a synclnypousmotor ShowEf Xs Ra Iat~Vt If and

the fiel~winding 3 Descripe the open-eircuit test ~t is measured What is varied Sketch the circuit 4 Descn1le the short-circuit test Mat is measured What is varied Sketch the circuit 5 Sketehatt open~ircuit ch8rac~riStic aDd a short-circuit charac~eriStic Show Ia (rated) Vt

(rated) a11da modified airgaplineL

Laboratory Exercise f Part A L

The open-circuit and short-circuit tests will be performed to determine values f~r Xs and ~using

LI

the synchronous machine as a generator

Procedure

1 ~ Connect the DC machine as a selfexcited shunt generator 88 shown in Lab 4 Part A ~g

diagram

2 ~ Couple the DC machine to the syn6~nous machine f 3 Set the 0-125 VDCbob to zeromiddot L

4 Set the 0-150 VDC kn~b to zero 5 Set the synchron~us mac~e to INn START e

6 Bring the DC~cbine terminal voltage up to 125 Vt and adjust the field rheostat to obtain a speed of 1800~M

7 Set the sYnchronous machine to SYNCH RUN 8 Perform the open-circuit test With the synchronous machines terminals open measure the

( voltage across the windings (V00) as field current (If) in increased Increase the field current t - by increasing the DC voltage across the field winding Vary If from 0 to lA in increments of

l 9 OlA Set If to zero

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10 Perform the short-circuit test Short the ph~ windings of the synchronous machine and put

i i an ammeter in series with the shorted windings Measuremiddotthe average windingcurrent (Isc) as L

If in increased V~If from 0 to lA in increments ofOlA ( t

i L- Calculations

1 4~middotVt = Voc =120middotVcaJ~ulatcentmiddotXs and K(Xs =Voc IIsc andK= Voc I If)

2 P16tIIalvs If~(IIal =1Vt--KIf) I Xsi ) t L Part Bmiddot L The annatuIecurrentwill be measured agfield current is varied under loadmiddot and no loadconc1itions

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-

1 Connectfh~sySte~ as sbownin the Lab 4 Part Bwiring diagram but do not couple the syn~~riq~-~tiinetothe DC machine~

2 Senhe~chronousmac~to lND STARr 3 Thin tbe6-1S0vnpknobto position cO5~

4 TumODmailtpoiVer

( S S~ the synclnpnbusmachine tq ~YNCH RUN The motor speed should be 1800 RPM L 6 MeasureIa andItas If is varief1 up to lA

Load Procedure shy

1 TUm offmain power 2 Mechanically couplethe synchronous machine to the DC ~hine

3 Set~~ first nine switches of the resistance load to ON ) 4 Setthe-~chrononsmachine to lND START L

5 Turno~middot-m~~wer

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1~ 6 Tuni the~o-lS0VDCknob to position 20bull

~ 7 Settheo-l25VDCknobtoposition pound9 tbull

8 Set the synchronous machine to SYNCH RUN The motor speed should be at 1800 RPM 9bull Measure Ia and Ifas Ifis varied up to lA

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Calculations L

1 Plot Ia V8 If for load and no load conditions and compare with c~cu1ated graph

2 Is there a best~fieldcurrent at which the synchronous machine should be operated

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Lab 4 ~art A Wiring Diagram

POWER PANEL

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MODEL WRM-100-3A WOUND-ROTOR MOTOR

GENERAL The WRY-100-SA is a three-phase four pole wound-rotor motorconsisting of a stator winding and a rotor winding withldip rings and brushes A three-pole

~ circuit breaker ~ also provided in the termm81 box The nominal ratings of the motor ari~ circuit breaker are listed below r

1 J l-- SPECIFICATIONS MOTORL

WmdingTypeshy Wound Btafor amp Rotor Horsepower shy 13HP Speed shy 175QRPM Voltage bull 20SV bull Sf Amiddot or 860V-s+Y

I Frequency- 60Hz L- Rating Continuous

Full Load Current bull 17 Amps

CIRCUIT BREAKER

Type of Operator bull Rocker Switch L No of PoleS bull Three

Overload )pe bull Thermal Trip Rating shy 2DAmpS Reset Method - middotOW- to Reset

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in Figure L Rotate the Wound Rotor Speed Control ~b to the maximum resisshytance fttn~ counterclockwise direction With all th~ ~ce in the rotor cir middotcai~ the motor-willdevelop maxirilum starting torque and minimum ~g curshy

rent Pwih up the rocker switch on the circuit breaker~ startmiddottqemotorbull The motor will accelerateup to speed The rheostat providesthe mSansofv~g theL motors lQieedtorque characteristicS The effect of the rlieostat increUes with increasing load onthe motorr ~

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FIGURE 1

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GENERAL

SPECIFICATIONS

middotMODEL SMmiddot100middot3ASYNCHRONOUS MACHINE

ThemiddotSMmiddotI00-8A is a three-phase four-pole machine consisting of a wyedel~ stashytor andmiddot 8 quadrature rotor having a DC field winding and a damper winding A three-pole circUit breaker and a IND START-BYNC RUN switch are provided in the terminal OOx- RatingS fonow

SM-100-3A MOTOR ampALTERNATOR

Speed - 1800 RPM Voltagemiddot Max Ambient Temp Insulation bull Rating bull

CIRCUIT BREAKER

Type of~tor shyNo ofPoles bull Overload Type bull Trip Rating bull Reset Methoa shy

ALTERNATOR

Power-Load Current bull Fielti Excitation shy

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208120V-B+-4W 4~ (1047) ClassmiddotB Continuous

Rocker Three Thermal L7amps

middot middotOFF to Reset

250 watts 07 amp (nominal) Separate L6 amps

18 HP 17 Amps 60Hz

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OPERATION Th~ proper connections tor operation of th~ SMl00-SA ~ a ~clttonous (SYNCHRONOUS motor are shown in Figure middot1 With ~ ~tebin the SYNC RUNposiliou MOTOR) ~ze the vari~ble DC supply and adjusttbe~tput voltage from zero up to

th~ value which eauses 1 amp to flow through the rotor ~turn the switch to the lNDSTART PO$ition middotand Start the motor by toggling~becircuit breaker to

the ONposltion WJten the motor reaches DO lQad 1ij)eeC1 move the switch to the SYNC RUN posItion The rotor will then sYnchronize with the nn~ and fJ1e motor wiD be ti1mrlng at exactly 1800 RPvL Used to demonstrate the Wrious ~tics of synclirOnous motors

+VARIABlpound DC

_sUPPLY

STATOR ROTOR middotL1middot 11 A~~-eJ-----CJ

middot AC u l 12

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VARIABLE + DC SUPPLY

FIGURE 1 SM-10o-3A AS A SYNCHRONOUS MoioR

ABC AC SUPPLY INPUT

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OPERATION The proper ampinn~~ fo~ operation or the SM-l00-SA as an alternator are ALTERNATOR) shown in Fi8Ure ~ With tliese connections made and the switch in the SYNCL RUNposition drive the alternator at 1800 RPM With a sUitable prime mover

Energize the DC Voltage supply and increase thesupplys output to bicrease f themiddotslternatorts output voltage to the desired value Toggle the circuit breaker ~L ~ tlie ON pPSition to connect the alternators output to the load Used to

middotdemonstrate the characteristics of a polyphase alternator of the stationary arshyr mature typebull ~t may also be used asthe loading device when testing the varishyI oUsmotom- shy

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rmiddot~ FIGURE 2 L SM-10o-3A AS AN ALTERNATOR

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SERJES100 OPERATING INStRUCTIONS

oMOoDEL DMmiddot1 DDA DC MACHINE

GENERAL The DY-10OA is amiddot two-pole compound-wound machine ~g of a shunt field a series field and an armature winding A shunt fie1dmiddotr~t and two-pole startel switM are also provided in the-terminal box ~tings follow

SPECIFICAnONS

MACHINE

Shunt Field Ex SepO5A 125V Insulation CJass F middotMax Ambient Temp 40 ~C (104 OF) Rating Continl101iS Speed 1800 RPM nominal Shunt Series Compound wo~dJl1Otcr

125V SOAt 18 HP Shunt Series Compound wound generator

RHEOSTAT

Resistance Power Current middot Taper Fuse Minimum Resistance Position

STARTER

Type of Operator No of Poles Overload Type Trip Rating middot Reset Method

125V 2A 250KW

800~Ohms

100 Watts O575middotAmps Lin ear 1A SJo Blo

Toggle Two Thermal 4lAmps Push Toggle down

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L FUNCTION The primDrJ function or the DC motor is to demonstrate the characteristics of

shunt series ancl compOund motors~ It IIl8Y also bemiddotutiHzed as a prime mover when testiJlg a gel1eraloror alternator Using the DCmiddotmotor tor this PurPose has the advantage th~tbe speed may be held constant bymiddot8djusting tJie shunt field rheostat after each load step is applied

L OPERATION The -proper connections for operation as a ClUDulative compound DC motor are

(DC MOTOR) shOWDin Fipre i Withmiddot theseoonndionS made the motor may be started by moving the starter switch toggle up to the ON position It is good praetioe to stad the motor with the shunt field rh~ in its minimum resistance fully COW position to provide m8amum starting torque andmiDitnum starting Curshy

L rent The motor may then be adjusted ~ the desired speed byadjUBtingtbe field rheostat or varying the line voltage

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FUNCTION The DC generator is p~arily utili2ed to demonstrate the characteristics of shunt series ~dCOinpound gen~tors It is~ alsOusedastlle loading device

when testing the vari~us motors

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OPERATION The~CODnections tor operation as a cmnulative C()~po1l1ld nCgenshyeratorareshown in Figure 2 With these connectio~middotmiddotDltldeJ drive theJDCmiddotGENERATOR gen~-atapproxhnately1800RPM with a suitable p~e moVer With thefie1qrheostatJnits Jll8Ximum resistance fullyc1ocm~ position enshyergiZe thel15V DC field supply Rotate the field rheostatinthecltunter

shy clockwisedir$ctian middottoinCreasemiddot the output voltage middotto the desiredmiddot value Switch Oti~middotthemiddotoverloadmiddot switChmiddotto connect the generators output to the

resistance load

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OUTPUT

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MODEL MGmiddotBmiddot100DG BEDPLATE f

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I - GENERAL

function otthe bedplate is toe~le the quickmounting ~dcoup1mg of the two individ~ macbiDoes to form a completemiddotmiddotm~ior-Pnerator setpwothreaded hpldshy

~ down)1Ocks ~d winged screwsareprovidecltoseeurethe F t claJnps which hold tbeinBcbinetsmounting boards A couplingguard and two shaft ~gwrrds are p~

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L 1 A~just each wing screw 021- ~e two screw clamp hold~ownmiddot ~locks to the top of its threaded stud - 0

i 2 Place each ~chine so that the rear of the base is reSting agairistmiddotthemiddot thd rear clamp on thei L- MGbasemiddot

8 Slide machines iJiboara until ~elrcouplingl1anPs are centered oVer cen~ slots 4 bert rub coupnngmiddotsleevemiddot~toone of the mac1dnes co~pling 1IimgM~ L

5 Slidere~jning machines coupling flange into-the other side of couplbig sleeve 6 Checktobe Sure thatmiddot~e couplhig guard will cOver coupling when insertedmiddotinto one ot thel pails areenter slotsmiddot 7 plaCe front clamp tor each of machines against the front or the two macbiD5t bases

(- s 8 F~pr tighten ~~uts 9it middotthe two screw clamp hold-down biocks Lmiddot 9 Mount coUplini aDd shaft guards by locating appropriate retainer clips in slotS so that coushy

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MODIL1-10oaA TRANSFClRfJIER OEMONSTRATOR

GENEijAL The TlOO-8A~~ts of three Single-phase bansformers wit~ m11Jtiple primary and secondary taps terminated atpinreceptacl~on the front of the unit Each of the three ~rOrinersmay beused independen1q Or the threemay~interconmiddot

f nected mseries~1npQmneJ or inmiddot many poJyph8seCbnfigurations

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EacbtraDslormer is~~middot af)vol~amperesat 60 Hertz ~ has two primary~d

two secoDdaqwindiIlBL Each ofthe priD1817 windiD~1tas800 turns of Nobull 24 gauge-wire and JSmiddotm~-120volta 05 amperes Onewhidingis tapped at 82 volts toprovide~~middotS~tttllp~(866$)middot~fthemiddot twomiddotwiDd1np~ 68ri~ Each or thesecondshylQ7middotwindh1pmiddot1uIs100t11rns of No 21 gauge wire and israted 60 volts 10 ampere One winding Js tappbd atmiddotlaquo volts to p~vide a Scott tapor the two windings in series Shownbelow are the voltage ratings orthe various taps for each of the three traDspoundormers

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t o 32V 120V 0 120V lI__

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middotSEmiddotRIES 100OPERATING INSTRUCTIONS

t bull MODEL middotRLmiddot100AmiddotRESISTANC~LOAD J J- shy~ GENERAL The RL-IOOAfs variable ftsistance unit used to applya resistivel0a4middottogenera

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tors or altemators One unit may be used in single-phase applications ora bank L of tlmae units may be combhled intQ Wye or De1taCOnt1IJDlt1~DS tor three phase

applicmioDS TiieRL-lOOA mttoduces resistieload~ ~sequentild steps r designed to prod11CB approximateiy equal ipcremeJlts otJoadmiddot~tmiddot The SPST f ~ toigle switches are numbered andmiddot must be cloSed in nUD1erl~ordertodecrease

totlreslstance~creasmglOad The total ~cemiddot or the cOb~ected~rs ( may be COmputed f~theequation L

middot 1 1 1-1 ~=R1+Ri+lt8middotmiddotmiddot

The ConowingO equations may be used to detemUne the power disSipated from a measurement of load currentor voltage

L P=EI = = I~

p (ampp) = 8 xEpBPH (tor balanced ioad)

Where P=P~inWatb

E =yoltage inVolfB I = Currentin Amperes

f R =Resistance in Ohms L P(Stp) =middotmiddotTotalPower for Three-Phase

~H ==~ Voltage per Phase~r Load Bankf L bull IpH = Ourrent per Phase ofLoad Bank ampshy

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~ SERIES 100 OPmiddotERATmiddotING INSTRUCTIONS

MODEL RLC-100RESmiddotISTANCE-REACTANmiddotCE LOAD

The RLCl00 ismiddota variable resistance and--reactance- (either ~ductive or capaci- tive) uDit that ~y be used _to apply a singl~plmse or a three-phase load The remstive load (w~ can be ~ for both middotACcd DC) is controDed by siz SPST toggle switches e8ch of which puts 2000 ohlnaof resistance in paraDelmiddot lor all three phases simultaneouslybullThe resistive-load is therefore always balanced The total resistance in eacli ph8se equals 2000- ohms divided by the Dumber of switches closed For example with two sWitehesclosedtbe total resistance-is 1000 ohms rith aUsiZ closed 8888 ohms Each or the three reactance loads (used forAC o~) separateVfused at 1 amp is controlled by a knob that varltlSthe degreeopound lead andmiddot l8g A clockwise rotationof the middotknob applies leadiIlg pOwer factor (cashypaCitive)loid while a counterc1~ rotation appIiesa lagging power factor (inductive) load There is DO lpadapplied whenthe-knob is in mid position

The 8-4-5 right triangle graph below may bemiddot~ to approximate a O~8 power factor leading or lagging

1 Appfi a resistiVe load 2 Readthe in-phase current h from -the ammeter 8 From the lR value on tlie horizontal base of the graph travel vertically to the

point where it intersects the 08 PF (total amps) line 4 Frommiddotthis point travel horizontally to the reactive current wlueIz 5 Adjust the ~ve load until the Ix ammeter reads this value of reactive cur

rent

6 To obtain a ~ced load in a three-phaseconfigaratioD repeat Step -5 for the other two~

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-7 97 HefJry

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DIAL POSITION CAPACITANCE (CLOCKWISE)

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1 1~57 J1F

2 316 J1F

3 501Jlf

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5 80~J1f

6 985 j1f 7 1160middotpF

8 1360J1Fmiddot

9 1609middotJ1F

10 18~JtF

11 2007~middotF

12 2170 fLF

13 2513 )iFmiddot

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SERIES 100OPERATING INSTAUCTIONS L

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MODJL ACVA-10()ACMETERINGPANEL L GENERAL The HAMPDEN Model ACVA-1OO consistsmiddotol two AC ammetem and one AC voltshy

meterA11 or the meters are dioaeprot8cted against overloads as high 1Ui 1000f

The ~ltmeter islicctt8 within 8 w1UIemiddotthe ammeters are accurate wi~hin ~ plusmn29D ormiddotfWl sCale dellection The middotme~rshave the following ranges

r I AC Voltm~teI Oto l00~OO V~ts ~ AC Amme~ OtlJQ5f2f4l8-Amps

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OPERATION

AC AMMETERS

L 1 Connect the ammeter in series so that the middotentire AC current to be measured passes

I through the ~~ter The test lead from the dark blue middotbindingpostis connected to one

side or the Dne and the test lead trom the Qrange bin~ post to the other ~ L

2 ~e choice or measuring range is iet with the range switch Fourmiddotranges are avaiiable O 05 0204 an~ 0 - 8 amperes

8 Set the rangemiddotswitch on the 8 ampere range Detore turning on the power

a) When ~ to measure motor current put a jumper lead between the tWo binding poststo protect the movement from the large inrushcurrent at start This jumper is

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MODELACWM-1 GO WATIMETER PANEL

GENERAL The1iAMPDEN Model ACWMmiddotI00 consists artwo Iilulti-rangewattmeters and

I tbe~tchesh-lh~r operation Eacli has ~e follOwing ranges l

)to 1~30016~1200W

(150300Volts 2148 Amps)

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OPERATION Measure wattage bymiddotconn8cling a wattmetervoltmeter andmiddot~ete~8sshownin Figtt81 The ~-MPstttOn mustO be~middotconn~middotin series- with the ioad and-the

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VQTS con mUstmiddotbeqo~n~middotiJ1 prU9l1elwith the load protected against overloads by diodes

The Otlrrent~Coils are

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-FIGURE 1 WATTMETER CONNECnONS 14IJ -- -

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Each wa~eter has tWomiddot Voltage mtinp (150 and- 800V)~ Rotating the range -switclirounterciOCkwise from OFF engages the 150 volt range Rotatmg the _range SWitch clOQkwise from O~ engages the 800 volt range Utilize the Voltmeters readiDg to determine the approprlllte-range

Each wattmetermiddot has three currentmiddot ratings (2 4 and SA) Rotating the range swiJchfrom middotO~engages the Samprarigefbst ~ the wattm~termiddotreadsbelow ~r 8Cll18 and the ammeter indicates that the 4 amp rating will not be ~e9 ~ectmiddotthe 4 ainp range-middot If the mttnie~ again reads below balt scaie and the ammeterindicates that the 2 amp rating will no~ bemiddot exceeded the 2 amp range may bese1ectedI

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L FIGURE 2 WATTMETER CONNECTIONS 3fi1

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L middot The totalwatbge is the sum of the two meter readings PI and P2

f When pow~ in a ~ced load is m~ured in this ~er the indication or the 1

two ~eterS VlLL~PT be the same except at 1D1ity power factor middot -shy

When the power factor of the circuit is less than 509b the pointer of meter PI will reverse~ To obtain total wattage in this case reverse the current connections to metet Pl -then subtract the rea~g ormeter PI from that of meter P2

The twO-wattmeter~method cannot be used with as-phase 4-wire load Three wattmeters are ~ in that case

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POWER FACTOR i f ~

Given a balallCed load the~oWer tacentor middoteanbe -d~emiined from the two wattmeter mth6cL - ~

L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

J be calca1ated -from-the -following_equation0

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tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

wherep2 repr~ts th~~ier~thetwoWl1ttiJ1~ re~ingswhentbepower faeto~l~other thaD uPity

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BiDet th~powertaetb~ 8q1alsthcosme ofthephaseangletP~powerfactor may also be I deterJninedfromtheratioo~thetwo wittmeterreadings middotmiddotThegraph b~ow shows the1 I

I relationship between themiddotpowerfacior andth~ratio~f P1lP2 ~

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MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

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L OPERATIONI

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DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

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agt If the currePtis~ter than 5 amperes the needlewDI move off-scale TuRN OFF POVER IMliEDIATELY AJf exception to this may be on motor starling Momenshytary current inrushbullmay exceed 5 ampe~ but theneedleiminediately drops back to normal

b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

L

1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

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a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

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MODEL-1723 rACHoME~R

DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

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MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

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l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

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JL ting the circuitmiddotl~~em

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Page 16: [1 Table D. - UTKweb.eecs.utk.edu/~jsl/ECE325/ECE325-LabManual.pdfLab #2 Load-Speed Characteristic of a DC Motor . Objective . The objective of . this . lab is to . detennine the load-speed

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Lab 3 Wiring Diagram

PONERPANa

0 0 0 0 0 120VAC ~laquoNAD4O-4W 12OVoAC MAINC PAl bull o-1atNDC - SEC PAL bull 00121VDC bull SEC 12OVAC

0 ~ 0 0 GJ EJ []] 0 GJ ~ 0 ~ 0

A 8 C N + 0000 00 Q

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La) 4 Synchronous Motor

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L Objective

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L The objective of ~ lab is tomiddotexamine the terminal characteristics ofa synchronous motor under - I08(fand no-load conditions

i L

Pre-Lab

i - L 1 Whatisan important feature ofsynchronous motors

~ Dra~ariequivalentcircuit modetfor a synclnypousmotor ShowEf Xs Ra Iat~Vt If and

the fiel~winding 3 Descripe the open-eircuit test ~t is measured What is varied Sketch the circuit 4 Descn1le the short-circuit test Mat is measured What is varied Sketch the circuit 5 Sketehatt open~ircuit ch8rac~riStic aDd a short-circuit charac~eriStic Show Ia (rated) Vt

(rated) a11da modified airgaplineL

Laboratory Exercise f Part A L

The open-circuit and short-circuit tests will be performed to determine values f~r Xs and ~using

LI

the synchronous machine as a generator

Procedure

1 ~ Connect the DC machine as a selfexcited shunt generator 88 shown in Lab 4 Part A ~g

diagram

2 ~ Couple the DC machine to the syn6~nous machine f 3 Set the 0-125 VDCbob to zeromiddot L

4 Set the 0-150 VDC kn~b to zero 5 Set the synchron~us mac~e to INn START e

6 Bring the DC~cbine terminal voltage up to 125 Vt and adjust the field rheostat to obtain a speed of 1800~M

7 Set the sYnchronous machine to SYNCH RUN 8 Perform the open-circuit test With the synchronous machines terminals open measure the

( voltage across the windings (V00) as field current (If) in increased Increase the field current t - by increasing the DC voltage across the field winding Vary If from 0 to lA in increments of

l 9 OlA Set If to zero

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10 Perform the short-circuit test Short the ph~ windings of the synchronous machine and put

i i an ammeter in series with the shorted windings Measuremiddotthe average windingcurrent (Isc) as L

If in increased V~If from 0 to lA in increments ofOlA ( t

i L- Calculations

1 4~middotVt = Voc =120middotVcaJ~ulatcentmiddotXs and K(Xs =Voc IIsc andK= Voc I If)

2 P16tIIalvs If~(IIal =1Vt--KIf) I Xsi ) t L Part Bmiddot L The annatuIecurrentwill be measured agfield current is varied under loadmiddot and no loadconc1itions

L-

-

1 Connectfh~sySte~ as sbownin the Lab 4 Part Bwiring diagram but do not couple the syn~~riq~-~tiinetothe DC machine~

2 Senhe~chronousmac~to lND STARr 3 Thin tbe6-1S0vnpknobto position cO5~

4 TumODmailtpoiVer

( S S~ the synclnpnbusmachine tq ~YNCH RUN The motor speed should be 1800 RPM L 6 MeasureIa andItas If is varief1 up to lA

Load Procedure shy

1 TUm offmain power 2 Mechanically couplethe synchronous machine to the DC ~hine

3 Set~~ first nine switches of the resistance load to ON ) 4 Setthe-~chrononsmachine to lND START L

5 Turno~middot-m~~wer

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1~ 6 Tuni the~o-lS0VDCknob to position 20bull

~ 7 Settheo-l25VDCknobtoposition pound9 tbull

8 Set the synchronous machine to SYNCH RUN The motor speed should be at 1800 RPM 9bull Measure Ia and Ifas Ifis varied up to lA

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1 Plot Ia V8 If for load and no load conditions and compare with c~cu1ated graph

2 Is there a best~fieldcurrent at which the synchronous machine should be operated

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POWER PANEL

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SERI~S100 OPERATINGINSTRUCTIONS amp bull ~

MODEL WRM-100-3A WOUND-ROTOR MOTOR

GENERAL The WRY-100-SA is a three-phase four pole wound-rotor motorconsisting of a stator winding and a rotor winding withldip rings and brushes A three-pole

~ circuit breaker ~ also provided in the termm81 box The nominal ratings of the motor ari~ circuit breaker are listed below r

1 J l-- SPECIFICATIONS MOTORL

WmdingTypeshy Wound Btafor amp Rotor Horsepower shy 13HP Speed shy 175QRPM Voltage bull 20SV bull Sf Amiddot or 860V-s+Y

I Frequency- 60Hz L- Rating Continuous

Full Load Current bull 17 Amps

CIRCUIT BREAKER

Type of Operator bull Rocker Switch L No of PoleS bull Three

Overload )pe bull Thermal Trip Rating shy 2DAmpS Reset Method - middotOW- to Reset

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in Figure L Rotate the Wound Rotor Speed Control ~b to the maximum resisshytance fttn~ counterclockwise direction With all th~ ~ce in the rotor cir middotcai~ the motor-willdevelop maxirilum starting torque and minimum ~g curshy

rent Pwih up the rocker switch on the circuit breaker~ startmiddottqemotorbull The motor will accelerateup to speed The rheostat providesthe mSansofv~g theL motors lQieedtorque characteristicS The effect of the rlieostat increUes with increasing load onthe motorr ~

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A 6 C AC INPUT SI1PPLY

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WRSe-100

FIGURE 1

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GENERAL

SPECIFICATIONS

middotMODEL SMmiddot100middot3ASYNCHRONOUS MACHINE

ThemiddotSMmiddotI00-8A is a three-phase four-pole machine consisting of a wyedel~ stashytor andmiddot 8 quadrature rotor having a DC field winding and a damper winding A three-pole circUit breaker and a IND START-BYNC RUN switch are provided in the terminal OOx- RatingS fonow

SM-100-3A MOTOR ampALTERNATOR

Speed - 1800 RPM Voltagemiddot Max Ambient Temp Insulation bull Rating bull

CIRCUIT BREAKER

Type of~tor shyNo ofPoles bull Overload Type bull Trip Rating bull Reset Methoa shy

ALTERNATOR

Power-Load Current bull Fielti Excitation shy

MOTOR

HorSepowershyCurrent bull Frequencyshy

208120V-B+-4W 4~ (1047) ClassmiddotB Continuous

Rocker Three Thermal L7amps

middot middotOFF to Reset

250 watts 07 amp (nominal) Separate L6 amps

18 HP 17 Amps 60Hz

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OPERATION Th~ proper connections tor operation of th~ SMl00-SA ~ a ~clttonous (SYNCHRONOUS motor are shown in Figure middot1 With ~ ~tebin the SYNC RUNposiliou MOTOR) ~ze the vari~ble DC supply and adjusttbe~tput voltage from zero up to

th~ value which eauses 1 amp to flow through the rotor ~turn the switch to the lNDSTART PO$ition middotand Start the motor by toggling~becircuit breaker to

the ONposltion WJten the motor reaches DO lQad 1ij)eeC1 move the switch to the SYNC RUN posItion The rotor will then sYnchronize with the nn~ and fJ1e motor wiD be ti1mrlng at exactly 1800 RPvL Used to demonstrate the Wrious ~tics of synclirOnous motors

+VARIABlpound DC

_sUPPLY

STATOR ROTOR middotL1middot 11 A~~-eJ-----CJ

middot AC u l 12

~~YB~T middotJ3~T3

ct-O--ltr

VARIABLE + DC SUPPLY

FIGURE 1 SM-10o-3A AS A SYNCHRONOUS MoioR

ABC AC SUPPLY INPUT

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OPERATION The proper ampinn~~ fo~ operation or the SM-l00-SA as an alternator are ALTERNATOR) shown in Fi8Ure ~ With tliese connections made and the switch in the SYNCL RUNposition drive the alternator at 1800 RPM With a sUitable prime mover

Energize the DC Voltage supply and increase thesupplys output to bicrease f themiddotslternatorts output voltage to the desired value Toggle the circuit breaker ~L ~ tlie ON pPSition to connect the alternators output to the load Used to

middotdemonstrate the characteristics of a polyphase alternator of the stationary arshyr mature typebull ~t may also be used asthe loading device when testing the varishyI oUsmotom- shy

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L bull DC

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OUTPUT

rmiddot~ FIGURE 2 L SM-10o-3A AS AN ALTERNATOR

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SERJES100 OPERATING INStRUCTIONS

oMOoDEL DMmiddot1 DDA DC MACHINE

GENERAL The DY-10OA is amiddot two-pole compound-wound machine ~g of a shunt field a series field and an armature winding A shunt fie1dmiddotr~t and two-pole startel switM are also provided in the-terminal box ~tings follow

SPECIFICAnONS

MACHINE

Shunt Field Ex SepO5A 125V Insulation CJass F middotMax Ambient Temp 40 ~C (104 OF) Rating Continl101iS Speed 1800 RPM nominal Shunt Series Compound wo~dJl1Otcr

125V SOAt 18 HP Shunt Series Compound wound generator

RHEOSTAT

Resistance Power Current middot Taper Fuse Minimum Resistance Position

STARTER

Type of Operator No of Poles Overload Type Trip Rating middot Reset Method

125V 2A 250KW

800~Ohms

100 Watts O575middotAmps Lin ear 1A SJo Blo

Toggle Two Thermal 4lAmps Push Toggle down

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L FUNCTION The primDrJ function or the DC motor is to demonstrate the characteristics of

shunt series ancl compOund motors~ It IIl8Y also bemiddotutiHzed as a prime mover when testiJlg a gel1eraloror alternator Using the DCmiddotmotor tor this PurPose has the advantage th~tbe speed may be held constant bymiddot8djusting tJie shunt field rheostat after each load step is applied

L OPERATION The -proper connections for operation as a ClUDulative compound DC motor are

(DC MOTOR) shOWDin Fipre i Withmiddot theseoonndionS made the motor may be started by moving the starter switch toggle up to the ON position It is good praetioe to stad the motor with the shunt field rh~ in its minimum resistance fully COW position to provide m8amum starting torque andmiDitnum starting Curshy

L rent The motor may then be adjusted ~ the desired speed byadjUBtingtbe field rheostat or varying the line voltage

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1 125VDO SUPPLY

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FUNCTION The DC generator is p~arily utili2ed to demonstrate the characteristics of shunt series ~dCOinpound gen~tors It is~ alsOusedastlle loading device

when testing the vari~us motors

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OPERATION The~CODnections tor operation as a cmnulative C()~po1l1ld nCgenshyeratorareshown in Figure 2 With these connectio~middotmiddotDltldeJ drive theJDCmiddotGENERATOR gen~-atapproxhnately1800RPM with a suitable p~e moVer With thefie1qrheostatJnits Jll8Ximum resistance fullyc1ocm~ position enshyergiZe thel15V DC field supply Rotate the field rheostatinthecltunter

shy clockwisedir$ctian middottoinCreasemiddot the output voltage middotto the desiredmiddot value Switch Oti~middotthemiddotoverloadmiddot switChmiddotto connect the generators output to the

resistance load

+ 1151 DC - 230 W

OUTPUT

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MODEL MGmiddotBmiddot100DG BEDPLATE f

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The MG Bedplateconsists of a heayy s~ baBe n10~~middotmiddoton vibration pads The

I - GENERAL

function otthe bedplate is toe~le the quickmounting ~dcoup1mg of the two individ~ macbiDoes to form a completemiddotmiddotm~ior-Pnerator setpwothreaded hpldshy

~ down)1Ocks ~d winged screwsareprovidecltoseeurethe F t claJnps which hold tbeinBcbinetsmounting boards A couplingguard and two shaft ~gwrrds are p~

r vided to p~ttheSiudenttrom accidet1talJito~gor~~gwires0l1 rotatshy- shy ing)arts The guardsmiddotare quickly mounted bY insertirig retamer CUpS in~T~9tsin

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The procedure for mou~ting and ioupling the machines to the base is as fon~

L 1 A~just each wing screw 021- ~e two screw clamp hold~ownmiddot ~locks to the top of its threaded stud - 0

i 2 Place each ~chine so that the rear of the base is reSting agairistmiddotthemiddot thd rear clamp on thei L- MGbasemiddot

8 Slide machines iJiboara until ~elrcouplingl1anPs are centered oVer cen~ slots 4 bert rub coupnngmiddotsleevemiddot~toone of the mac1dnes co~pling 1IimgM~ L

5 Slidere~jning machines coupling flange into-the other side of couplbig sleeve 6 Checktobe Sure thatmiddot~e couplhig guard will cOver coupling when insertedmiddotinto one ot thel pails areenter slotsmiddot 7 plaCe front clamp tor each of machines against the front or the two macbiD5t bases

(- s 8 F~pr tighten ~~uts 9it middotthe two screw clamp hold-down biocks Lmiddot 9 Mount coUplini aDd shaft guards by locating appropriate retainer clips in slotS so that coushy

pling is ~der co~Ung guard and ~ sh~ is covered by a ~haft guatdL

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MODIL1-10oaA TRANSFClRfJIER OEMONSTRATOR

GENEijAL The TlOO-8A~~ts of three Single-phase bansformers wit~ m11Jtiple primary and secondary taps terminated atpinreceptacl~on the front of the unit Each of the three ~rOrinersmay beused independen1q Or the threemay~interconmiddot

f nected mseries~1npQmneJ or inmiddot many poJyph8seCbnfigurations

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EacbtraDslormer is~~middot af)vol~amperesat 60 Hertz ~ has two primary~d

two secoDdaqwindiIlBL Each ofthe priD1817 windiD~1tas800 turns of Nobull 24 gauge-wire and JSmiddotm~-120volta 05 amperes Onewhidingis tapped at 82 volts toprovide~~middotS~tttllp~(866$)middot~fthemiddot twomiddotwiDd1np~ 68ri~ Each or thesecondshylQ7middotwindh1pmiddot1uIs100t11rns of No 21 gauge wire and israted 60 volts 10 ampere One winding Js tappbd atmiddotlaquo volts to p~vide a Scott tapor the two windings in series Shownbelow are the voltage ratings orthe various taps for each of the three traDspoundormers

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t o 32V 120V 0 120V lI__

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t bull MODEL middotRLmiddot100AmiddotRESISTANC~LOAD J J- shy~ GENERAL The RL-IOOAfs variable ftsistance unit used to applya resistivel0a4middottogenera

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tors or altemators One unit may be used in single-phase applications ora bank L of tlmae units may be combhled intQ Wye or De1taCOnt1IJDlt1~DS tor three phase

applicmioDS TiieRL-lOOA mttoduces resistieload~ ~sequentild steps r designed to prod11CB approximateiy equal ipcremeJlts otJoadmiddot~tmiddot The SPST f ~ toigle switches are numbered andmiddot must be cloSed in nUD1erl~ordertodecrease

totlreslstance~creasmglOad The total ~cemiddot or the cOb~ected~rs ( may be COmputed f~theequation L

middot 1 1 1-1 ~=R1+Ri+lt8middotmiddotmiddot

The ConowingO equations may be used to detemUne the power disSipated from a measurement of load currentor voltage

L P=EI = = I~

p (ampp) = 8 xEpBPH (tor balanced ioad)

Where P=P~inWatb

E =yoltage inVolfB I = Currentin Amperes

f R =Resistance in Ohms L P(Stp) =middotmiddotTotalPower for Three-Phase

~H ==~ Voltage per Phase~r Load Bankf L bull IpH = Ourrent per Phase ofLoad Bank ampshy

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MODEL RLC-100RESmiddotISTANCE-REACTANmiddotCE LOAD

The RLCl00 ismiddota variable resistance and--reactance- (either ~ductive or capaci- tive) uDit that ~y be used _to apply a singl~plmse or a three-phase load The remstive load (w~ can be ~ for both middotACcd DC) is controDed by siz SPST toggle switches e8ch of which puts 2000 ohlnaof resistance in paraDelmiddot lor all three phases simultaneouslybullThe resistive-load is therefore always balanced The total resistance in eacli ph8se equals 2000- ohms divided by the Dumber of switches closed For example with two sWitehesclosedtbe total resistance-is 1000 ohms rith aUsiZ closed 8888 ohms Each or the three reactance loads (used forAC o~) separateVfused at 1 amp is controlled by a knob that varltlSthe degreeopound lead andmiddot l8g A clockwise rotationof the middotknob applies leadiIlg pOwer factor (cashypaCitive)loid while a counterc1~ rotation appIiesa lagging power factor (inductive) load There is DO lpadapplied whenthe-knob is in mid position

The 8-4-5 right triangle graph below may bemiddot~ to approximate a O~8 power factor leading or lagging

1 Appfi a resistiVe load 2 Readthe in-phase current h from -the ammeter 8 From the lR value on tlie horizontal base of the graph travel vertically to the

point where it intersects the 08 PF (total amps) line 4 Frommiddotthis point travel horizontally to the reactive current wlueIz 5 Adjust the ~ve load until the Ix ammeter reads this value of reactive cur

rent

6 To obtain a ~ced load in a three-phaseconfigaratioD repeat Step -5 for the other two~

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-13 47 Henry

middotINDUCTANCEDIAL POSITIONmiddot (~middotQLJNT~RCmiddotLOCKWJSE)

-12 51 Henry

middot11 ~ 57 Henry

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-15 ~41middotmiddotHQIllY

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-16 37 Henry~

-7 97 HefJry

middot6 middot1tt~H~nry

-18 33 HenlY

DIAL POSITION CAPACITANCE (CLOCKWISE)

0 69 llF

1 1~57 J1F

2 316 J1F

3 501Jlf

middot4 640J1F

5 80~J1f

6 985 j1f 7 1160middotpF

8 1360J1Fmiddot

9 1609middotJ1F

10 18~JtF

11 2007~middotF

12 2170 fLF

13 2513 )iFmiddot

14 2860J1F

15 3090 pFmiddot

15 3269JlF

17 3539 JlFmiddot (

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SERIES 100OPERATING INSTAUCTIONS L

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MODJL ACVA-10()ACMETERINGPANEL L GENERAL The HAMPDEN Model ACVA-1OO consistsmiddotol two AC ammetem and one AC voltshy

meterA11 or the meters are dioaeprot8cted against overloads as high 1Ui 1000f

The ~ltmeter islicctt8 within 8 w1UIemiddotthe ammeters are accurate wi~hin ~ plusmn29D ormiddotfWl sCale dellection The middotme~rshave the following ranges

r I AC Voltm~teI Oto l00~OO V~ts ~ AC Amme~ OtlJQ5f2f4l8-Amps

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OPERATION

AC AMMETERS

L 1 Connect the ammeter in series so that the middotentire AC current to be measured passes

I through the ~~ter The test lead from the dark blue middotbindingpostis connected to one

side or the Dne and the test lead trom the Qrange bin~ post to the other ~ L

2 ~e choice or measuring range is iet with the range switch Fourmiddotranges are avaiiable O 05 0204 an~ 0 - 8 amperes

8 Set the rangemiddotswitch on the 8 ampere range Detore turning on the power

a) When ~ to measure motor current put a jumper lead between the tWo binding poststo protect the movement from the large inrushcurrent at start This jumper is

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removed after the motor has started

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MODELACWM-1 GO WATIMETER PANEL

GENERAL The1iAMPDEN Model ACWMmiddotI00 consists artwo Iilulti-rangewattmeters and

I tbe~tchesh-lh~r operation Eacli has ~e follOwing ranges l

)to 1~30016~1200W

(150300Volts 2148 Amps)

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OPERATION Measure wattage bymiddotconn8cling a wattmetervoltmeter andmiddot~ete~8sshownin Figtt81 The ~-MPstttOn mustO be~middotconn~middotin series- with the ioad and-the

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VQTS con mUstmiddotbeqo~n~middotiJ1 prU9l1elwith the load protected against overloads by diodes

The Otlrrent~Coils are

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-FIGURE 1 WATTMETER CONNECnONS 14IJ -- -

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Each wa~eter has tWomiddot Voltage mtinp (150 and- 800V)~ Rotating the range -switclirounterciOCkwise from OFF engages the 150 volt range Rotatmg the _range SWitch clOQkwise from O~ engages the 800 volt range Utilize the Voltmeters readiDg to determine the approprlllte-range

Each wattmetermiddot has three currentmiddot ratings (2 4 and SA) Rotating the range swiJchfrom middotO~engages the Samprarigefbst ~ the wattm~termiddotreadsbelow ~r 8Cll18 and the ammeter indicates that the 4 amp rating will not be ~e9 ~ectmiddotthe 4 ainp range-middot If the mttnie~ again reads below balt scaie and the ammeterindicates that the 2 amp rating will no~ bemiddot exceeded the 2 amp range may bese1ectedI

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L FIGURE 2 WATTMETER CONNECTIONS 3fi1

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L middot The totalwatbge is the sum of the two meter readings PI and P2

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two ~eterS VlLL~PT be the same except at 1D1ity power factor middot -shy

When the power factor of the circuit is less than 509b the pointer of meter PI will reverse~ To obtain total wattage in this case reverse the current connections to metet Pl -then subtract the rea~g ormeter PI from that of meter P2

The twO-wattmeter~method cannot be used with as-phase 4-wire load Three wattmeters are ~ in that case

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POWER FACTOR i f ~

Given a balallCed load the~oWer tacentor middoteanbe -d~emiined from the two wattmeter mth6cL - ~

L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

J be calca1ated -from-the -following_equation0

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tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

wherep2 repr~ts th~~ier~thetwoWl1ttiJ1~ re~ingswhentbepower faeto~l~other thaD uPity

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BiDet th~powertaetb~ 8q1alsthcosme ofthephaseangletP~powerfactor may also be I deterJninedfromtheratioo~thetwo wittmeterreadings middotmiddotThegraph b~ow shows the1 I

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MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

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DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

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agt If the currePtis~ter than 5 amperes the needlewDI move off-scale TuRN OFF POVER IMliEDIATELY AJf exception to this may be on motor starling Momenshytary current inrushbullmay exceed 5 ampe~ but theneedleiminediately drops back to normal

b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

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1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

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a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

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MODEL-1723 rACHoME~R

DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

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MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

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OPEBATIONTouSe the powermiddotpanelt (lISt tum ON ~MAIN AC circuit breaker~i This will m~tethemain AC pnot Hght and 9nergize the four-pin ~Pyen~i supplying fix~208120VAOtliree-phase poWer Th~ other 1ixed~d~Je sulpHes may

l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

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L I tNOTE ~~ ~~ltage oo~~lbob fOr the 0-208120V three-phase sUpply is ~ted at the ~nd or the

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IfanY~r~es11PplifSri-e~vefloaded one or more circuit breakers may trip middotOFF Al- ir ways turnthemiddotVariable suppllesto zero and remove the C8usaopound the oyerload before resetshy

JL ting the circuitmiddotl~~em

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Page 17: [1 Table D. - UTKweb.eecs.utk.edu/~jsl/ECE325/ECE325-LabManual.pdfLab #2 Load-Speed Characteristic of a DC Motor . Objective . The objective of . this . lab is to . detennine the load-speed

La) 4 Synchronous Motor

j I

L Objective

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L The objective of ~ lab is tomiddotexamine the terminal characteristics ofa synchronous motor under - I08(fand no-load conditions

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Pre-Lab

i - L 1 Whatisan important feature ofsynchronous motors

~ Dra~ariequivalentcircuit modetfor a synclnypousmotor ShowEf Xs Ra Iat~Vt If and

the fiel~winding 3 Descripe the open-eircuit test ~t is measured What is varied Sketch the circuit 4 Descn1le the short-circuit test Mat is measured What is varied Sketch the circuit 5 Sketehatt open~ircuit ch8rac~riStic aDd a short-circuit charac~eriStic Show Ia (rated) Vt

(rated) a11da modified airgaplineL

Laboratory Exercise f Part A L

The open-circuit and short-circuit tests will be performed to determine values f~r Xs and ~using

LI

the synchronous machine as a generator

Procedure

1 ~ Connect the DC machine as a selfexcited shunt generator 88 shown in Lab 4 Part A ~g

diagram

2 ~ Couple the DC machine to the syn6~nous machine f 3 Set the 0-125 VDCbob to zeromiddot L

4 Set the 0-150 VDC kn~b to zero 5 Set the synchron~us mac~e to INn START e

6 Bring the DC~cbine terminal voltage up to 125 Vt and adjust the field rheostat to obtain a speed of 1800~M

7 Set the sYnchronous machine to SYNCH RUN 8 Perform the open-circuit test With the synchronous machines terminals open measure the

( voltage across the windings (V00) as field current (If) in increased Increase the field current t - by increasing the DC voltage across the field winding Vary If from 0 to lA in increments of

l 9 OlA Set If to zero

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10 Perform the short-circuit test Short the ph~ windings of the synchronous machine and put

i i an ammeter in series with the shorted windings Measuremiddotthe average windingcurrent (Isc) as L

If in increased V~If from 0 to lA in increments ofOlA ( t

i L- Calculations

1 4~middotVt = Voc =120middotVcaJ~ulatcentmiddotXs and K(Xs =Voc IIsc andK= Voc I If)

2 P16tIIalvs If~(IIal =1Vt--KIf) I Xsi ) t L Part Bmiddot L The annatuIecurrentwill be measured agfield current is varied under loadmiddot and no loadconc1itions

L-

-

1 Connectfh~sySte~ as sbownin the Lab 4 Part Bwiring diagram but do not couple the syn~~riq~-~tiinetothe DC machine~

2 Senhe~chronousmac~to lND STARr 3 Thin tbe6-1S0vnpknobto position cO5~

4 TumODmailtpoiVer

( S S~ the synclnpnbusmachine tq ~YNCH RUN The motor speed should be 1800 RPM L 6 MeasureIa andItas If is varief1 up to lA

Load Procedure shy

1 TUm offmain power 2 Mechanically couplethe synchronous machine to the DC ~hine

3 Set~~ first nine switches of the resistance load to ON ) 4 Setthe-~chrononsmachine to lND START L

5 Turno~middot-m~~wer

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1~ 6 Tuni the~o-lS0VDCknob to position 20bull

~ 7 Settheo-l25VDCknobtoposition pound9 tbull

8 Set the synchronous machine to SYNCH RUN The motor speed should be at 1800 RPM 9bull Measure Ia and Ifas Ifis varied up to lA

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Calculations L

1 Plot Ia V8 If for load and no load conditions and compare with c~cu1ated graph

2 Is there a best~fieldcurrent at which the synchronous machine should be operated

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Lab 4 ~art A Wiring Diagram

POWER PANEL

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SERI~S100 OPERATINGINSTRUCTIONS amp bull ~

MODEL WRM-100-3A WOUND-ROTOR MOTOR

GENERAL The WRY-100-SA is a three-phase four pole wound-rotor motorconsisting of a stator winding and a rotor winding withldip rings and brushes A three-pole

~ circuit breaker ~ also provided in the termm81 box The nominal ratings of the motor ari~ circuit breaker are listed below r

1 J l-- SPECIFICATIONS MOTORL

WmdingTypeshy Wound Btafor amp Rotor Horsepower shy 13HP Speed shy 175QRPM Voltage bull 20SV bull Sf Amiddot or 860V-s+Y

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Full Load Current bull 17 Amps

CIRCUIT BREAKER

Type of Operator bull Rocker Switch L No of PoleS bull Three

Overload )pe bull Thermal Trip Rating shy 2DAmpS Reset Method - middotOW- to Reset

r I - shy OPERATION To operatethe ~-l00-SAas an induction motor make the connections shown

in Figure L Rotate the Wound Rotor Speed Control ~b to the maximum resisshytance fttn~ counterclockwise direction With all th~ ~ce in the rotor cir middotcai~ the motor-willdevelop maxirilum starting torque and minimum ~g curshy

rent Pwih up the rocker switch on the circuit breaker~ startmiddottqemotorbull The motor will accelerateup to speed The rheostat providesthe mSansofv~g theL motors lQieedtorque characteristicS The effect of the rlieostat increUes with increasing load onthe motorr ~

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ENGfNEERING CORPORATION ------- MANUFACTURERS 01= EQUIPMENT lOR EDUCATION AND INDUSTlY

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GENERAL

SPECIFICATIONS

middotMODEL SMmiddot100middot3ASYNCHRONOUS MACHINE

ThemiddotSMmiddotI00-8A is a three-phase four-pole machine consisting of a wyedel~ stashytor andmiddot 8 quadrature rotor having a DC field winding and a damper winding A three-pole circUit breaker and a IND START-BYNC RUN switch are provided in the terminal OOx- RatingS fonow

SM-100-3A MOTOR ampALTERNATOR

Speed - 1800 RPM Voltagemiddot Max Ambient Temp Insulation bull Rating bull

CIRCUIT BREAKER

Type of~tor shyNo ofPoles bull Overload Type bull Trip Rating bull Reset Methoa shy

ALTERNATOR

Power-Load Current bull Fielti Excitation shy

MOTOR

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208120V-B+-4W 4~ (1047) ClassmiddotB Continuous

Rocker Three Thermal L7amps

middot middotOFF to Reset

250 watts 07 amp (nominal) Separate L6 amps

18 HP 17 Amps 60Hz

ENGINEERING COAPORATION --~-MANUf~RpoundRS~ EQUIPMENT lOR EDUCATION ANO INDUSTRY

Po Box 563 East Lon~~dow~ O~028 (413) 525-3981 bull 1tX95-S426 bull Pax (413) 525-4741

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OPERATION Th~ proper connections tor operation of th~ SMl00-SA ~ a ~clttonous (SYNCHRONOUS motor are shown in Figure middot1 With ~ ~tebin the SYNC RUNposiliou MOTOR) ~ze the vari~ble DC supply and adjusttbe~tput voltage from zero up to

th~ value which eauses 1 amp to flow through the rotor ~turn the switch to the lNDSTART PO$ition middotand Start the motor by toggling~becircuit breaker to

the ONposltion WJten the motor reaches DO lQad 1ij)eeC1 move the switch to the SYNC RUN posItion The rotor will then sYnchronize with the nn~ and fJ1e motor wiD be ti1mrlng at exactly 1800 RPvL Used to demonstrate the Wrious ~tics of synclirOnous motors

+VARIABlpound DC

_sUPPLY

STATOR ROTOR middotL1middot 11 A~~-eJ-----CJ

middot AC u l 12

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VARIABLE + DC SUPPLY

FIGURE 1 SM-10o-3A AS A SYNCHRONOUS MoioR

ABC AC SUPPLY INPUT

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OPERATION The proper ampinn~~ fo~ operation or the SM-l00-SA as an alternator are ALTERNATOR) shown in Fi8Ure ~ With tliese connections made and the switch in the SYNCL RUNposition drive the alternator at 1800 RPM With a sUitable prime mover

Energize the DC Voltage supply and increase thesupplys output to bicrease f themiddotslternatorts output voltage to the desired value Toggle the circuit breaker ~L ~ tlie ON pPSition to connect the alternators output to the load Used to

middotdemonstrate the characteristics of a polyphase alternator of the stationary arshyr mature typebull ~t may also be used asthe loading device when testing the varishyI oUsmotom- shy

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OUTPUT

rmiddot~ FIGURE 2 L SM-10o-3A AS AN ALTERNATOR

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SERJES100 OPERATING INStRUCTIONS

oMOoDEL DMmiddot1 DDA DC MACHINE

GENERAL The DY-10OA is amiddot two-pole compound-wound machine ~g of a shunt field a series field and an armature winding A shunt fie1dmiddotr~t and two-pole startel switM are also provided in the-terminal box ~tings follow

SPECIFICAnONS

MACHINE

Shunt Field Ex SepO5A 125V Insulation CJass F middotMax Ambient Temp 40 ~C (104 OF) Rating Continl101iS Speed 1800 RPM nominal Shunt Series Compound wo~dJl1Otcr

125V SOAt 18 HP Shunt Series Compound wound generator

RHEOSTAT

Resistance Power Current middot Taper Fuse Minimum Resistance Position

STARTER

Type of Operator No of Poles Overload Type Trip Rating middot Reset Method

125V 2A 250KW

800~Ohms

100 Watts O575middotAmps Lin ear 1A SJo Blo

Toggle Two Thermal 4lAmps Push Toggle down

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L FUNCTION The primDrJ function or the DC motor is to demonstrate the characteristics of

shunt series ancl compOund motors~ It IIl8Y also bemiddotutiHzed as a prime mover when testiJlg a gel1eraloror alternator Using the DCmiddotmotor tor this PurPose has the advantage th~tbe speed may be held constant bymiddot8djusting tJie shunt field rheostat after each load step is applied

L OPERATION The -proper connections for operation as a ClUDulative compound DC motor are

(DC MOTOR) shOWDin Fipre i Withmiddot theseoonndionS made the motor may be started by moving the starter switch toggle up to the ON position It is good praetioe to stad the motor with the shunt field rh~ in its minimum resistance fully COW position to provide m8amum starting torque andmiDitnum starting Curshy

L rent The motor may then be adjusted ~ the desired speed byadjUBtingtbe field rheostat or varying the line voltage

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1 125VDO SUPPLY

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FUNCTION The DC generator is p~arily utili2ed to demonstrate the characteristics of shunt series ~dCOinpound gen~tors It is~ alsOusedastlle loading device

when testing the vari~us motors

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OPERATION The~CODnections tor operation as a cmnulative C()~po1l1ld nCgenshyeratorareshown in Figure 2 With these connectio~middotmiddotDltldeJ drive theJDCmiddotGENERATOR gen~-atapproxhnately1800RPM with a suitable p~e moVer With thefie1qrheostatJnits Jll8Ximum resistance fullyc1ocm~ position enshyergiZe thel15V DC field supply Rotate the field rheostatinthecltunter

shy clockwisedir$ctian middottoinCreasemiddot the output voltage middotto the desiredmiddot value Switch Oti~middotthemiddotoverloadmiddot switChmiddotto connect the generators output to the

resistance load

+ 1151 DC - 230 W

OUTPUT

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MODEL MGmiddotBmiddot100DG BEDPLATE f

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The MG Bedplateconsists of a heayy s~ baBe n10~~middotmiddoton vibration pads The

I - GENERAL

function otthe bedplate is toe~le the quickmounting ~dcoup1mg of the two individ~ macbiDoes to form a completemiddotmiddotm~ior-Pnerator setpwothreaded hpldshy

~ down)1Ocks ~d winged screwsareprovidecltoseeurethe F t claJnps which hold tbeinBcbinetsmounting boards A couplingguard and two shaft ~gwrrds are p~

r vided to p~ttheSiudenttrom accidet1talJito~gor~~gwires0l1 rotatshy- shy ing)arts The guardsmiddotare quickly mounted bY insertirig retamer CUpS in~T~9tsin

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The procedure for mou~ting and ioupling the machines to the base is as fon~

L 1 A~just each wing screw 021- ~e two screw clamp hold~ownmiddot ~locks to the top of its threaded stud - 0

i 2 Place each ~chine so that the rear of the base is reSting agairistmiddotthemiddot thd rear clamp on thei L- MGbasemiddot

8 Slide machines iJiboara until ~elrcouplingl1anPs are centered oVer cen~ slots 4 bert rub coupnngmiddotsleevemiddot~toone of the mac1dnes co~pling 1IimgM~ L

5 Slidere~jning machines coupling flange into-the other side of couplbig sleeve 6 Checktobe Sure thatmiddot~e couplhig guard will cOver coupling when insertedmiddotinto one ot thel pails areenter slotsmiddot 7 plaCe front clamp tor each of machines against the front or the two macbiD5t bases

(- s 8 F~pr tighten ~~uts 9it middotthe two screw clamp hold-down biocks Lmiddot 9 Mount coUplini aDd shaft guards by locating appropriate retainer clips in slotS so that coushy

pling is ~der co~Ung guard and ~ sh~ is covered by a ~haft guatdL

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MODIL1-10oaA TRANSFClRfJIER OEMONSTRATOR

GENEijAL The TlOO-8A~~ts of three Single-phase bansformers wit~ m11Jtiple primary and secondary taps terminated atpinreceptacl~on the front of the unit Each of the three ~rOrinersmay beused independen1q Or the threemay~interconmiddot

f nected mseries~1npQmneJ or inmiddot many poJyph8seCbnfigurations

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EacbtraDslormer is~~middot af)vol~amperesat 60 Hertz ~ has two primary~d

two secoDdaqwindiIlBL Each ofthe priD1817 windiD~1tas800 turns of Nobull 24 gauge-wire and JSmiddotm~-120volta 05 amperes Onewhidingis tapped at 82 volts toprovide~~middotS~tttllp~(866$)middot~fthemiddot twomiddotwiDd1np~ 68ri~ Each or thesecondshylQ7middotwindh1pmiddot1uIs100t11rns of No 21 gauge wire and israted 60 volts 10 ampere One winding Js tappbd atmiddotlaquo volts to p~vide a Scott tapor the two windings in series Shownbelow are the voltage ratings orthe various taps for each of the three traDspoundormers

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t o 32V 120V 0 120V lI__

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X1 X2 X3 X4 X5 X8 X7

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t bull MODEL middotRLmiddot100AmiddotRESISTANC~LOAD J J- shy~ GENERAL The RL-IOOAfs variable ftsistance unit used to applya resistivel0a4middottogenera

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tors or altemators One unit may be used in single-phase applications ora bank L of tlmae units may be combhled intQ Wye or De1taCOnt1IJDlt1~DS tor three phase

applicmioDS TiieRL-lOOA mttoduces resistieload~ ~sequentild steps r designed to prod11CB approximateiy equal ipcremeJlts otJoadmiddot~tmiddot The SPST f ~ toigle switches are numbered andmiddot must be cloSed in nUD1erl~ordertodecrease

totlreslstance~creasmglOad The total ~cemiddot or the cOb~ected~rs ( may be COmputed f~theequation L

middot 1 1 1-1 ~=R1+Ri+lt8middotmiddotmiddot

The ConowingO equations may be used to detemUne the power disSipated from a measurement of load currentor voltage

L P=EI = = I~

p (ampp) = 8 xEpBPH (tor balanced ioad)

Where P=P~inWatb

E =yoltage inVolfB I = Currentin Amperes

f R =Resistance in Ohms L P(Stp) =middotmiddotTotalPower for Three-Phase

~H ==~ Voltage per Phase~r Load Bankf L bull IpH = Ourrent per Phase ofLoad Bank ampshy

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~ SERIES 100 OPmiddotERATmiddotING INSTRUCTIONS

MODEL RLC-100RESmiddotISTANCE-REACTANmiddotCE LOAD

The RLCl00 ismiddota variable resistance and--reactance- (either ~ductive or capaci- tive) uDit that ~y be used _to apply a singl~plmse or a three-phase load The remstive load (w~ can be ~ for both middotACcd DC) is controDed by siz SPST toggle switches e8ch of which puts 2000 ohlnaof resistance in paraDelmiddot lor all three phases simultaneouslybullThe resistive-load is therefore always balanced The total resistance in eacli ph8se equals 2000- ohms divided by the Dumber of switches closed For example with two sWitehesclosedtbe total resistance-is 1000 ohms rith aUsiZ closed 8888 ohms Each or the three reactance loads (used forAC o~) separateVfused at 1 amp is controlled by a knob that varltlSthe degreeopound lead andmiddot l8g A clockwise rotationof the middotknob applies leadiIlg pOwer factor (cashypaCitive)loid while a counterc1~ rotation appIiesa lagging power factor (inductive) load There is DO lpadapplied whenthe-knob is in mid position

The 8-4-5 right triangle graph below may bemiddot~ to approximate a O~8 power factor leading or lagging

1 Appfi a resistiVe load 2 Readthe in-phase current h from -the ammeter 8 From the lR value on tlie horizontal base of the graph travel vertically to the

point where it intersects the 08 PF (total amps) line 4 Frommiddotthis point travel horizontally to the reactive current wlueIz 5 Adjust the ~ve load until the Ix ammeter reads this value of reactive cur

rent

6 To obtain a ~ced load in a three-phaseconfigaratioD repeat Step -5 for the other two~

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-17 35 Henry

-13 47 Henry

middotINDUCTANCEDIAL POSITIONmiddot (~middotQLJNT~RCmiddotLOCKWJSE)

-12 51 Henry

middot11 ~ 57 Henry

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-5 143H~nrYmiddot

-15 ~41middotmiddotHQIllY

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-7 97 HefJry

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DIAL POSITION CAPACITANCE (CLOCKWISE)

0 69 llF

1 1~57 J1F

2 316 J1F

3 501Jlf

middot4 640J1F

5 80~J1f

6 985 j1f 7 1160middotpF

8 1360J1Fmiddot

9 1609middotJ1F

10 18~JtF

11 2007~middotF

12 2170 fLF

13 2513 )iFmiddot

14 2860J1F

15 3090 pFmiddot

15 3269JlF

17 3539 JlFmiddot (

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SERIES 100OPERATING INSTAUCTIONS L

- -

-

MODJL ACVA-10()ACMETERINGPANEL L GENERAL The HAMPDEN Model ACVA-1OO consistsmiddotol two AC ammetem and one AC voltshy

meterA11 or the meters are dioaeprot8cted against overloads as high 1Ui 1000f

The ~ltmeter islicctt8 within 8 w1UIemiddotthe ammeters are accurate wi~hin ~ plusmn29D ormiddotfWl sCale dellection The middotme~rshave the following ranges

r I AC Voltm~teI Oto l00~OO V~ts ~ AC Amme~ OtlJQ5f2f4l8-Amps

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OPERATION

AC AMMETERS

L 1 Connect the ammeter in series so that the middotentire AC current to be measured passes

I through the ~~ter The test lead from the dark blue middotbindingpostis connected to one

side or the Dne and the test lead trom the Qrange bin~ post to the other ~ L

2 ~e choice or measuring range is iet with the range switch Fourmiddotranges are avaiiable O 05 0204 an~ 0 - 8 amperes

8 Set the rangemiddotswitch on the 8 ampere range Detore turning on the power

a) When ~ to measure motor current put a jumper lead between the tWo binding poststo protect the movement from the large inrushcurrent at start This jumper is

(

removed after the motor has started

--~---~--~_--------~---_~_----ENGINEERfNG CORPORATION

MANUFACTURERSmiddotOF rpUIPMCNT F()R EDUCATION AND INDUSTRY

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MODELACWM-1 GO WATIMETER PANEL

GENERAL The1iAMPDEN Model ACWMmiddotI00 consists artwo Iilulti-rangewattmeters and

I tbe~tchesh-lh~r operation Eacli has ~e follOwing ranges l

)to 1~30016~1200W

(150300Volts 2148 Amps)

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OPERATION Measure wattage bymiddotconn8cling a wattmetervoltmeter andmiddot~ete~8sshownin Figtt81 The ~-MPstttOn mustO be~middotconn~middotin series- with the ioad and-the

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VQTS con mUstmiddotbeqo~n~middotiJ1 prU9l1elwith the load protected against overloads by diodes

The Otlrrent~Coils are

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-FIGURE 1 WATTMETER CONNECnONS 14IJ -- -

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Each wa~eter has tWomiddot Voltage mtinp (150 and- 800V)~ Rotating the range -switclirounterciOCkwise from OFF engages the 150 volt range Rotatmg the _range SWitch clOQkwise from O~ engages the 800 volt range Utilize the Voltmeters readiDg to determine the approprlllte-range

Each wattmetermiddot has three currentmiddot ratings (2 4 and SA) Rotating the range swiJchfrom middotO~engages the Samprarigefbst ~ the wattm~termiddotreadsbelow ~r 8Cll18 and the ammeter indicates that the 4 amp rating will not be ~e9 ~ectmiddotthe 4 ainp range-middot If the mttnie~ again reads below balt scaie and the ammeterindicates that the 2 amp rating will no~ bemiddot exceeded the 2 amp range may bese1ectedI

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L FIGURE 2 WATTMETER CONNECTIONS 3fi1

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L middot The totalwatbge is the sum of the two meter readings PI and P2

f When pow~ in a ~ced load is m~ured in this ~er the indication or the 1

two ~eterS VlLL~PT be the same except at 1D1ity power factor middot -shy

When the power factor of the circuit is less than 509b the pointer of meter PI will reverse~ To obtain total wattage in this case reverse the current connections to metet Pl -then subtract the rea~g ormeter PI from that of meter P2

The twO-wattmeter~method cannot be used with as-phase 4-wire load Three wattmeters are ~ in that case

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POWER FACTOR i f ~

Given a balallCed load the~oWer tacentor middoteanbe -d~emiined from the two wattmeter mth6cL - ~

L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

J be calca1ated -from-the -following_equation0

J ~

tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

wherep2 repr~ts th~~ier~thetwoWl1ttiJ1~ re~ingswhentbepower faeto~l~other thaD uPity

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BiDet th~powertaetb~ 8q1alsthcosme ofthephaseangletP~powerfactor may also be I deterJninedfromtheratioo~thetwo wittmeterreadings middotmiddotThegraph b~ow shows the1 I

I relationship between themiddotpowerfacior andth~ratio~f P1lP2 ~

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MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

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L OPERATIONI

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DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

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agt If the currePtis~ter than 5 amperes the needlewDI move off-scale TuRN OFF POVER IMliEDIATELY AJf exception to this may be on motor starling Momenshytary current inrushbullmay exceed 5 ampe~ but theneedleiminediately drops back to normal

b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

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1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

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a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

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DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

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MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

L bull Fieci120VAC 15A~u~tWod~plex receptacles bull ~12OVAC single-pJiase2-~lOA bull FiX~208120VAC~phase 4-wire15A bull VariabJe 0 ~ 24oI14QVAC8-~i~~9A

f bull -Vari8bleO ~ 150vnQ-i~(lA isolated l~RMS L bull Variable 0 ~ 125VDCt 5Q -isolated ItlmiddotRMS middot

OPEBATIONTouSe the powermiddotpanelt (lISt tum ON ~MAIN AC circuit breaker~i This will m~tethemain AC pnot Hght and 9nergize the four-pin ~Pyen~i supplying fix~208120VAOtliree-phase poWer Th~ other 1ixed~d~Je sulpHes may

l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

cuit ~~ (both ~ ~ncl BEc) A clockwise lOtation of the vol~cpntro1 -- ~ ~eause ~~~~the voltage a~ble at the appropriate 1~Ptashy

L I tNOTE ~~ ~~ltage oo~~lbob fOr the 0-208120V three-phase sUpply is ~ted at the ~nd or the

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IfanY~r~es11PplifSri-e~vefloaded one or more circuit breakers may trip middotOFF Al- ir ways turnthemiddotVariable suppllesto zero and remove the C8usaopound the oyerload before resetshy

JL ting the circuitmiddotl~~em

A pindiilg ~ groun4 oenn~oDis proVided at each end or the panel fOrgrounding the rotating macbin~

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Page 18: [1 Table D. - UTKweb.eecs.utk.edu/~jsl/ECE325/ECE325-LabManual.pdfLab #2 Load-Speed Characteristic of a DC Motor . Objective . The objective of . this . lab is to . detennine the load-speed

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10 Perform the short-circuit test Short the ph~ windings of the synchronous machine and put

i i an ammeter in series with the shorted windings Measuremiddotthe average windingcurrent (Isc) as L

If in increased V~If from 0 to lA in increments ofOlA ( t

i L- Calculations

1 4~middotVt = Voc =120middotVcaJ~ulatcentmiddotXs and K(Xs =Voc IIsc andK= Voc I If)

2 P16tIIalvs If~(IIal =1Vt--KIf) I Xsi ) t L Part Bmiddot L The annatuIecurrentwill be measured agfield current is varied under loadmiddot and no loadconc1itions

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1 Connectfh~sySte~ as sbownin the Lab 4 Part Bwiring diagram but do not couple the syn~~riq~-~tiinetothe DC machine~

2 Senhe~chronousmac~to lND STARr 3 Thin tbe6-1S0vnpknobto position cO5~

4 TumODmailtpoiVer

( S S~ the synclnpnbusmachine tq ~YNCH RUN The motor speed should be 1800 RPM L 6 MeasureIa andItas If is varief1 up to lA

Load Procedure shy

1 TUm offmain power 2 Mechanically couplethe synchronous machine to the DC ~hine

3 Set~~ first nine switches of the resistance load to ON ) 4 Setthe-~chrononsmachine to lND START L

5 Turno~middot-m~~wer

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1~ 6 Tuni the~o-lS0VDCknob to position 20bull

~ 7 Settheo-l25VDCknobtoposition pound9 tbull

8 Set the synchronous machine to SYNCH RUN The motor speed should be at 1800 RPM 9bull Measure Ia and Ifas Ifis varied up to lA

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Calculations L

1 Plot Ia V8 If for load and no load conditions and compare with c~cu1ated graph

2 Is there a best~fieldcurrent at which the synchronous machine should be operated

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Lab 4 ~art A Wiring Diagram

POWER PANEL

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SERI~S100 OPERATINGINSTRUCTIONS amp bull ~

MODEL WRM-100-3A WOUND-ROTOR MOTOR

GENERAL The WRY-100-SA is a three-phase four pole wound-rotor motorconsisting of a stator winding and a rotor winding withldip rings and brushes A three-pole

~ circuit breaker ~ also provided in the termm81 box The nominal ratings of the motor ari~ circuit breaker are listed below r

1 J l-- SPECIFICATIONS MOTORL

WmdingTypeshy Wound Btafor amp Rotor Horsepower shy 13HP Speed shy 175QRPM Voltage bull 20SV bull Sf Amiddot or 860V-s+Y

I Frequency- 60Hz L- Rating Continuous

Full Load Current bull 17 Amps

CIRCUIT BREAKER

Type of Operator bull Rocker Switch L No of PoleS bull Three

Overload )pe bull Thermal Trip Rating shy 2DAmpS Reset Method - middotOW- to Reset

r I - shy OPERATION To operatethe ~-l00-SAas an induction motor make the connections shown

in Figure L Rotate the Wound Rotor Speed Control ~b to the maximum resisshytance fttn~ counterclockwise direction With all th~ ~ce in the rotor cir middotcai~ the motor-willdevelop maxirilum starting torque and minimum ~g curshy

rent Pwih up the rocker switch on the circuit breaker~ startmiddottqemotorbull The motor will accelerateup to speed The rheostat providesthe mSansofv~g theL motors lQieedtorque characteristicS The effect of the rlieostat increUes with increasing load onthe motorr ~

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A 6 C AC INPUT SI1PPLY

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WRSe-100

FIGURE 1

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GENERAL

SPECIFICATIONS

middotMODEL SMmiddot100middot3ASYNCHRONOUS MACHINE

ThemiddotSMmiddotI00-8A is a three-phase four-pole machine consisting of a wyedel~ stashytor andmiddot 8 quadrature rotor having a DC field winding and a damper winding A three-pole circUit breaker and a IND START-BYNC RUN switch are provided in the terminal OOx- RatingS fonow

SM-100-3A MOTOR ampALTERNATOR

Speed - 1800 RPM Voltagemiddot Max Ambient Temp Insulation bull Rating bull

CIRCUIT BREAKER

Type of~tor shyNo ofPoles bull Overload Type bull Trip Rating bull Reset Methoa shy

ALTERNATOR

Power-Load Current bull Fielti Excitation shy

MOTOR

HorSepowershyCurrent bull Frequencyshy

208120V-B+-4W 4~ (1047) ClassmiddotB Continuous

Rocker Three Thermal L7amps

middot middotOFF to Reset

250 watts 07 amp (nominal) Separate L6 amps

18 HP 17 Amps 60Hz

ENGINEERING COAPORATION --~-MANUf~RpoundRS~ EQUIPMENT lOR EDUCATION ANO INDUSTRY

Po Box 563 East Lon~~dow~ O~028 (413) 525-3981 bull 1tX95-S426 bull Pax (413) 525-4741

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OPERATION Th~ proper connections tor operation of th~ SMl00-SA ~ a ~clttonous (SYNCHRONOUS motor are shown in Figure middot1 With ~ ~tebin the SYNC RUNposiliou MOTOR) ~ze the vari~ble DC supply and adjusttbe~tput voltage from zero up to

th~ value which eauses 1 amp to flow through the rotor ~turn the switch to the lNDSTART PO$ition middotand Start the motor by toggling~becircuit breaker to

the ONposltion WJten the motor reaches DO lQad 1ij)eeC1 move the switch to the SYNC RUN posItion The rotor will then sYnchronize with the nn~ and fJ1e motor wiD be ti1mrlng at exactly 1800 RPvL Used to demonstrate the Wrious ~tics of synclirOnous motors

+VARIABlpound DC

_sUPPLY

STATOR ROTOR middotL1middot 11 A~~-eJ-----CJ

middot AC u l 12

~~YB~T middotJ3~T3

ct-O--ltr

VARIABLE + DC SUPPLY

FIGURE 1 SM-10o-3A AS A SYNCHRONOUS MoioR

ABC AC SUPPLY INPUT

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OPERATION The proper ampinn~~ fo~ operation or the SM-l00-SA as an alternator are ALTERNATOR) shown in Fi8Ure ~ With tliese connections made and the switch in the SYNCL RUNposition drive the alternator at 1800 RPM With a sUitable prime mover

Energize the DC Voltage supply and increase thesupplys output to bicrease f themiddotslternatorts output voltage to the desired value Toggle the circuit breaker ~L ~ tlie ON pPSition to connect the alternators output to the load Used to

middotdemonstrate the characteristics of a polyphase alternator of the stationary arshyr mature typebull ~t may also be used asthe loading device when testing the varishyI oUsmotom- shy

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OUTPUT

rmiddot~ FIGURE 2 L SM-10o-3A AS AN ALTERNATOR

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SERJES100 OPERATING INStRUCTIONS

oMOoDEL DMmiddot1 DDA DC MACHINE

GENERAL The DY-10OA is amiddot two-pole compound-wound machine ~g of a shunt field a series field and an armature winding A shunt fie1dmiddotr~t and two-pole startel switM are also provided in the-terminal box ~tings follow

SPECIFICAnONS

MACHINE

Shunt Field Ex SepO5A 125V Insulation CJass F middotMax Ambient Temp 40 ~C (104 OF) Rating Continl101iS Speed 1800 RPM nominal Shunt Series Compound wo~dJl1Otcr

125V SOAt 18 HP Shunt Series Compound wound generator

RHEOSTAT

Resistance Power Current middot Taper Fuse Minimum Resistance Position

STARTER

Type of Operator No of Poles Overload Type Trip Rating middot Reset Method

125V 2A 250KW

800~Ohms

100 Watts O575middotAmps Lin ear 1A SJo Blo

Toggle Two Thermal 4lAmps Push Toggle down

ENGI-NEERING CORPORATION ----MANUFACTURERS OF eoulPUEHT FOR EDUCATION ANOINOUSTRY

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L FUNCTION The primDrJ function or the DC motor is to demonstrate the characteristics of

shunt series ancl compOund motors~ It IIl8Y also bemiddotutiHzed as a prime mover when testiJlg a gel1eraloror alternator Using the DCmiddotmotor tor this PurPose has the advantage th~tbe speed may be held constant bymiddot8djusting tJie shunt field rheostat after each load step is applied

L OPERATION The -proper connections for operation as a ClUDulative compound DC motor are

(DC MOTOR) shOWDin Fipre i Withmiddot theseoonndionS made the motor may be started by moving the starter switch toggle up to the ON position It is good praetioe to stad the motor with the shunt field rh~ in its minimum resistance fully COW position to provide m8amum starting torque andmiDitnum starting Curshy

L rent The motor may then be adjusted ~ the desired speed byadjUBtingtbe field rheostat or varying the line voltage

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1 125VDO SUPPLY

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FUNCTION The DC generator is p~arily utili2ed to demonstrate the characteristics of shunt series ~dCOinpound gen~tors It is~ alsOusedastlle loading device

when testing the vari~us motors

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OPERATION The~CODnections tor operation as a cmnulative C()~po1l1ld nCgenshyeratorareshown in Figure 2 With these connectio~middotmiddotDltldeJ drive theJDCmiddotGENERATOR gen~-atapproxhnately1800RPM with a suitable p~e moVer With thefie1qrheostatJnits Jll8Ximum resistance fullyc1ocm~ position enshyergiZe thel15V DC field supply Rotate the field rheostatinthecltunter

shy clockwisedir$ctian middottoinCreasemiddot the output voltage middotto the desiredmiddot value Switch Oti~middotthemiddotoverloadmiddot switChmiddotto connect the generators output to the

resistance load

+ 1151 DC - 230 W

OUTPUT

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FIGURE 2DC G~NERATOR)

ENGINEERING CORPORATION MANUFACTURERS Oyen eoutPUampNT FOR EDUCATION AND IHOUSTRY

Po Box S63 East Longmeadow -MA 01028 (413) S2S-3981 bull TLX 95-5426 bull p~ (413) 525-4741

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MODEL MGmiddotBmiddot100DG BEDPLATE f

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The MG Bedplateconsists of a heayy s~ baBe n10~~middotmiddoton vibration pads The

I - GENERAL

function otthe bedplate is toe~le the quickmounting ~dcoup1mg of the two individ~ macbiDoes to form a completemiddotmiddotm~ior-Pnerator setpwothreaded hpldshy

~ down)1Ocks ~d winged screwsareprovidecltoseeurethe F t claJnps which hold tbeinBcbinetsmounting boards A couplingguard and two shaft ~gwrrds are p~

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The procedure for mou~ting and ioupling the machines to the base is as fon~

L 1 A~just each wing screw 021- ~e two screw clamp hold~ownmiddot ~locks to the top of its threaded stud - 0

i 2 Place each ~chine so that the rear of the base is reSting agairistmiddotthemiddot thd rear clamp on thei L- MGbasemiddot

8 Slide machines iJiboara until ~elrcouplingl1anPs are centered oVer cen~ slots 4 bert rub coupnngmiddotsleevemiddot~toone of the mac1dnes co~pling 1IimgM~ L

5 Slidere~jning machines coupling flange into-the other side of couplbig sleeve 6 Checktobe Sure thatmiddot~e couplhig guard will cOver coupling when insertedmiddotinto one ot thel pails areenter slotsmiddot 7 plaCe front clamp tor each of machines against the front or the two macbiD5t bases

(- s 8 F~pr tighten ~~uts 9it middotthe two screw clamp hold-down biocks Lmiddot 9 Mount coUplini aDd shaft guards by locating appropriate retainer clips in slotS so that coushy

pling is ~der co~Ung guard and ~ sh~ is covered by a ~haft guatdL

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SERIES 100 -OPERATINGINSTRUCTIONS

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MODIL1-10oaA TRANSFClRfJIER OEMONSTRATOR

GENEijAL The TlOO-8A~~ts of three Single-phase bansformers wit~ m11Jtiple primary and secondary taps terminated atpinreceptacl~on the front of the unit Each of the three ~rOrinersmay beused independen1q Or the threemay~interconmiddot

f nected mseries~1npQmneJ or inmiddot many poJyph8seCbnfigurations

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two secoDdaqwindiIlBL Each ofthe priD1817 windiD~1tas800 turns of Nobull 24 gauge-wire and JSmiddotm~-120volta 05 amperes Onewhidingis tapped at 82 volts toprovide~~middotS~tttllp~(866$)middot~fthemiddot twomiddotwiDd1np~ 68ri~ Each or thesecondshylQ7middotwindh1pmiddot1uIs100t11rns of No 21 gauge wire and israted 60 volts 10 ampere One winding Js tappbd atmiddotlaquo volts to p~vide a Scott tapor the two windings in series Shownbelow are the voltage ratings orthe various taps for each of the three traDspoundormers

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middotSEmiddotRIES 100OPERATING INSTRUCTIONS

t bull MODEL middotRLmiddot100AmiddotRESISTANC~LOAD J J- shy~ GENERAL The RL-IOOAfs variable ftsistance unit used to applya resistivel0a4middottogenera

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tors or altemators One unit may be used in single-phase applications ora bank L of tlmae units may be combhled intQ Wye or De1taCOnt1IJDlt1~DS tor three phase

applicmioDS TiieRL-lOOA mttoduces resistieload~ ~sequentild steps r designed to prod11CB approximateiy equal ipcremeJlts otJoadmiddot~tmiddot The SPST f ~ toigle switches are numbered andmiddot must be cloSed in nUD1erl~ordertodecrease

totlreslstance~creasmglOad The total ~cemiddot or the cOb~ected~rs ( may be COmputed f~theequation L

middot 1 1 1-1 ~=R1+Ri+lt8middotmiddotmiddot

The ConowingO equations may be used to detemUne the power disSipated from a measurement of load currentor voltage

L P=EI = = I~

p (ampp) = 8 xEpBPH (tor balanced ioad)

Where P=P~inWatb

E =yoltage inVolfB I = Currentin Amperes

f R =Resistance in Ohms L P(Stp) =middotmiddotTotalPower for Three-Phase

~H ==~ Voltage per Phase~r Load Bankf L bull IpH = Ourrent per Phase ofLoad Bank ampshy

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FROM AC OR DC SOURCE

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~ SERIES 100 OPmiddotERATmiddotING INSTRUCTIONS

MODEL RLC-100RESmiddotISTANCE-REACTANmiddotCE LOAD

The RLCl00 ismiddota variable resistance and--reactance- (either ~ductive or capaci- tive) uDit that ~y be used _to apply a singl~plmse or a three-phase load The remstive load (w~ can be ~ for both middotACcd DC) is controDed by siz SPST toggle switches e8ch of which puts 2000 ohlnaof resistance in paraDelmiddot lor all three phases simultaneouslybullThe resistive-load is therefore always balanced The total resistance in eacli ph8se equals 2000- ohms divided by the Dumber of switches closed For example with two sWitehesclosedtbe total resistance-is 1000 ohms rith aUsiZ closed 8888 ohms Each or the three reactance loads (used forAC o~) separateVfused at 1 amp is controlled by a knob that varltlSthe degreeopound lead andmiddot l8g A clockwise rotationof the middotknob applies leadiIlg pOwer factor (cashypaCitive)loid while a counterc1~ rotation appIiesa lagging power factor (inductive) load There is DO lpadapplied whenthe-knob is in mid position

The 8-4-5 right triangle graph below may bemiddot~ to approximate a O~8 power factor leading or lagging

1 Appfi a resistiVe load 2 Readthe in-phase current h from -the ammeter 8 From the lR value on tlie horizontal base of the graph travel vertically to the

point where it intersects the 08 PF (total amps) line 4 Frommiddotthis point travel horizontally to the reactive current wlueIz 5 Adjust the ~ve load until the Ix ammeter reads this value of reactive cur

rent

6 To obtain a ~ced load in a three-phaseconfigaratioD repeat Step -5 for the other two~

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middot11 ~ 57 Henry

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-7 97 HefJry

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DIAL POSITION CAPACITANCE (CLOCKWISE)

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1 1~57 J1F

2 316 J1F

3 501Jlf

middot4 640J1F

5 80~J1f

6 985 j1f 7 1160middotpF

8 1360J1Fmiddot

9 1609middotJ1F

10 18~JtF

11 2007~middotF

12 2170 fLF

13 2513 )iFmiddot

14 2860J1F

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15 3269JlF

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SERIES 100OPERATING INSTAUCTIONS L

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MODJL ACVA-10()ACMETERINGPANEL L GENERAL The HAMPDEN Model ACVA-1OO consistsmiddotol two AC ammetem and one AC voltshy

meterA11 or the meters are dioaeprot8cted against overloads as high 1Ui 1000f

The ~ltmeter islicctt8 within 8 w1UIemiddotthe ammeters are accurate wi~hin ~ plusmn29D ormiddotfWl sCale dellection The middotme~rshave the following ranges

r I AC Voltm~teI Oto l00~OO V~ts ~ AC Amme~ OtlJQ5f2f4l8-Amps

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OPERATION

AC AMMETERS

L 1 Connect the ammeter in series so that the middotentire AC current to be measured passes

I through the ~~ter The test lead from the dark blue middotbindingpostis connected to one

side or the Dne and the test lead trom the Qrange bin~ post to the other ~ L

2 ~e choice or measuring range is iet with the range switch Fourmiddotranges are avaiiable O 05 0204 an~ 0 - 8 amperes

8 Set the rangemiddotswitch on the 8 ampere range Detore turning on the power

a) When ~ to measure motor current put a jumper lead between the tWo binding poststo protect the movement from the large inrushcurrent at start This jumper is

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removed after the motor has started

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MODELACWM-1 GO WATIMETER PANEL

GENERAL The1iAMPDEN Model ACWMmiddotI00 consists artwo Iilulti-rangewattmeters and

I tbe~tchesh-lh~r operation Eacli has ~e follOwing ranges l

)to 1~30016~1200W

(150300Volts 2148 Amps)

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OPERATION Measure wattage bymiddotconn8cling a wattmetervoltmeter andmiddot~ete~8sshownin Figtt81 The ~-MPstttOn mustO be~middotconn~middotin series- with the ioad and-the

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VQTS con mUstmiddotbeqo~n~middotiJ1 prU9l1elwith the load protected against overloads by diodes

The Otlrrent~Coils are

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-FIGURE 1 WATTMETER CONNECnONS 14IJ -- -

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Each wa~eter has tWomiddot Voltage mtinp (150 and- 800V)~ Rotating the range -switclirounterciOCkwise from OFF engages the 150 volt range Rotatmg the _range SWitch clOQkwise from O~ engages the 800 volt range Utilize the Voltmeters readiDg to determine the approprlllte-range

Each wattmetermiddot has three currentmiddot ratings (2 4 and SA) Rotating the range swiJchfrom middotO~engages the Samprarigefbst ~ the wattm~termiddotreadsbelow ~r 8Cll18 and the ammeter indicates that the 4 amp rating will not be ~e9 ~ectmiddotthe 4 ainp range-middot If the mttnie~ again reads below balt scaie and the ammeterindicates that the 2 amp rating will no~ bemiddot exceeded the 2 amp range may bese1ectedI

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L FIGURE 2 WATTMETER CONNECTIONS 3fi1

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L middot The totalwatbge is the sum of the two meter readings PI and P2

f When pow~ in a ~ced load is m~ured in this ~er the indication or the 1

two ~eterS VlLL~PT be the same except at 1D1ity power factor middot -shy

When the power factor of the circuit is less than 509b the pointer of meter PI will reverse~ To obtain total wattage in this case reverse the current connections to metet Pl -then subtract the rea~g ormeter PI from that of meter P2

The twO-wattmeter~method cannot be used with as-phase 4-wire load Three wattmeters are ~ in that case

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POWER FACTOR i f ~

Given a balallCed load the~oWer tacentor middoteanbe -d~emiined from the two wattmeter mth6cL - ~

L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

J be calca1ated -from-the -following_equation0

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tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

wherep2 repr~ts th~~ier~thetwoWl1ttiJ1~ re~ingswhentbepower faeto~l~other thaD uPity

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BiDet th~powertaetb~ 8q1alsthcosme ofthephaseangletP~powerfactor may also be I deterJninedfromtheratioo~thetwo wittmeterreadings middotmiddotThegraph b~ow shows the1 I

I relationship between themiddotpowerfacior andth~ratio~f P1lP2 ~

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MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

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L OPERATIONI

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DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

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agt If the currePtis~ter than 5 amperes the needlewDI move off-scale TuRN OFF POVER IMliEDIATELY AJf exception to this may be on motor starling Momenshytary current inrushbullmay exceed 5 ampe~ but theneedleiminediately drops back to normal

b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

L

1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

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a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

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MODEL-1723 rACHoME~R

DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

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MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

L bull Fieci120VAC 15A~u~tWod~plex receptacles bull ~12OVAC single-pJiase2-~lOA bull FiX~208120VAC~phase 4-wire15A bull VariabJe 0 ~ 24oI14QVAC8-~i~~9A

f bull -Vari8bleO ~ 150vnQ-i~(lA isolated l~RMS L bull Variable 0 ~ 125VDCt 5Q -isolated ItlmiddotRMS middot

OPEBATIONTouSe the powermiddotpanelt (lISt tum ON ~MAIN AC circuit breaker~i This will m~tethemain AC pnot Hght and 9nergize the four-pin ~Pyen~i supplying fix~208120VAOtliree-phase poWer Th~ other 1ixed~d~Je sulpHes may

l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

cuit ~~ (both ~ ~ncl BEc) A clockwise lOtation of the vol~cpntro1 -- ~ ~eause ~~~~the voltage a~ble at the appropriate 1~Ptashy

L I tNOTE ~~ ~~ltage oo~~lbob fOr the 0-208120V three-phase sUpply is ~ted at the ~nd or the

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IfanY~r~es11PplifSri-e~vefloaded one or more circuit breakers may trip middotOFF Al- ir ways turnthemiddotVariable suppllesto zero and remove the C8usaopound the oyerload before resetshy

JL ting the circuitmiddotl~~em

A pindiilg ~ groun4 oenn~oDis proVided at each end or the panel fOrgrounding the rotating macbin~

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POWER PANEL

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SERI~S100 OPERATINGINSTRUCTIONS amp bull ~

MODEL WRM-100-3A WOUND-ROTOR MOTOR

GENERAL The WRY-100-SA is a three-phase four pole wound-rotor motorconsisting of a stator winding and a rotor winding withldip rings and brushes A three-pole

~ circuit breaker ~ also provided in the termm81 box The nominal ratings of the motor ari~ circuit breaker are listed below r

1 J l-- SPECIFICATIONS MOTORL

WmdingTypeshy Wound Btafor amp Rotor Horsepower shy 13HP Speed shy 175QRPM Voltage bull 20SV bull Sf Amiddot or 860V-s+Y

I Frequency- 60Hz L- Rating Continuous

Full Load Current bull 17 Amps

CIRCUIT BREAKER

Type of Operator bull Rocker Switch L No of PoleS bull Three

Overload )pe bull Thermal Trip Rating shy 2DAmpS Reset Method - middotOW- to Reset

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in Figure L Rotate the Wound Rotor Speed Control ~b to the maximum resisshytance fttn~ counterclockwise direction With all th~ ~ce in the rotor cir middotcai~ the motor-willdevelop maxirilum starting torque and minimum ~g curshy

rent Pwih up the rocker switch on the circuit breaker~ startmiddottqemotorbull The motor will accelerateup to speed The rheostat providesthe mSansofv~g theL motors lQieedtorque characteristicS The effect of the rlieostat increUes with increasing load onthe motorr ~

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FIGURE 1

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GENERAL

SPECIFICATIONS

middotMODEL SMmiddot100middot3ASYNCHRONOUS MACHINE

ThemiddotSMmiddotI00-8A is a three-phase four-pole machine consisting of a wyedel~ stashytor andmiddot 8 quadrature rotor having a DC field winding and a damper winding A three-pole circUit breaker and a IND START-BYNC RUN switch are provided in the terminal OOx- RatingS fonow

SM-100-3A MOTOR ampALTERNATOR

Speed - 1800 RPM Voltagemiddot Max Ambient Temp Insulation bull Rating bull

CIRCUIT BREAKER

Type of~tor shyNo ofPoles bull Overload Type bull Trip Rating bull Reset Methoa shy

ALTERNATOR

Power-Load Current bull Fielti Excitation shy

MOTOR

HorSepowershyCurrent bull Frequencyshy

208120V-B+-4W 4~ (1047) ClassmiddotB Continuous

Rocker Three Thermal L7amps

middot middotOFF to Reset

250 watts 07 amp (nominal) Separate L6 amps

18 HP 17 Amps 60Hz

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OPERATION Th~ proper connections tor operation of th~ SMl00-SA ~ a ~clttonous (SYNCHRONOUS motor are shown in Figure middot1 With ~ ~tebin the SYNC RUNposiliou MOTOR) ~ze the vari~ble DC supply and adjusttbe~tput voltage from zero up to

th~ value which eauses 1 amp to flow through the rotor ~turn the switch to the lNDSTART PO$ition middotand Start the motor by toggling~becircuit breaker to

the ONposltion WJten the motor reaches DO lQad 1ij)eeC1 move the switch to the SYNC RUN posItion The rotor will then sYnchronize with the nn~ and fJ1e motor wiD be ti1mrlng at exactly 1800 RPvL Used to demonstrate the Wrious ~tics of synclirOnous motors

+VARIABlpound DC

_sUPPLY

STATOR ROTOR middotL1middot 11 A~~-eJ-----CJ

middot AC u l 12

~~YB~T middotJ3~T3

ct-O--ltr

VARIABLE + DC SUPPLY

FIGURE 1 SM-10o-3A AS A SYNCHRONOUS MoioR

ABC AC SUPPLY INPUT

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OPERATION The proper ampinn~~ fo~ operation or the SM-l00-SA as an alternator are ALTERNATOR) shown in Fi8Ure ~ With tliese connections made and the switch in the SYNCL RUNposition drive the alternator at 1800 RPM With a sUitable prime mover

Energize the DC Voltage supply and increase thesupplys output to bicrease f themiddotslternatorts output voltage to the desired value Toggle the circuit breaker ~L ~ tlie ON pPSition to connect the alternators output to the load Used to

middotdemonstrate the characteristics of a polyphase alternator of the stationary arshyr mature typebull ~t may also be used asthe loading device when testing the varishyI oUsmotom- shy

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OUTPUT

rmiddot~ FIGURE 2 L SM-10o-3A AS AN ALTERNATOR

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SERJES100 OPERATING INStRUCTIONS

oMOoDEL DMmiddot1 DDA DC MACHINE

GENERAL The DY-10OA is amiddot two-pole compound-wound machine ~g of a shunt field a series field and an armature winding A shunt fie1dmiddotr~t and two-pole startel switM are also provided in the-terminal box ~tings follow

SPECIFICAnONS

MACHINE

Shunt Field Ex SepO5A 125V Insulation CJass F middotMax Ambient Temp 40 ~C (104 OF) Rating Continl101iS Speed 1800 RPM nominal Shunt Series Compound wo~dJl1Otcr

125V SOAt 18 HP Shunt Series Compound wound generator

RHEOSTAT

Resistance Power Current middot Taper Fuse Minimum Resistance Position

STARTER

Type of Operator No of Poles Overload Type Trip Rating middot Reset Method

125V 2A 250KW

800~Ohms

100 Watts O575middotAmps Lin ear 1A SJo Blo

Toggle Two Thermal 4lAmps Push Toggle down

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L FUNCTION The primDrJ function or the DC motor is to demonstrate the characteristics of

shunt series ancl compOund motors~ It IIl8Y also bemiddotutiHzed as a prime mover when testiJlg a gel1eraloror alternator Using the DCmiddotmotor tor this PurPose has the advantage th~tbe speed may be held constant bymiddot8djusting tJie shunt field rheostat after each load step is applied

L OPERATION The -proper connections for operation as a ClUDulative compound DC motor are

(DC MOTOR) shOWDin Fipre i Withmiddot theseoonndionS made the motor may be started by moving the starter switch toggle up to the ON position It is good praetioe to stad the motor with the shunt field rh~ in its minimum resistance fully COW position to provide m8amum starting torque andmiDitnum starting Curshy

L rent The motor may then be adjusted ~ the desired speed byadjUBtingtbe field rheostat or varying the line voltage

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1 125VDO SUPPLY

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FUNCTION The DC generator is p~arily utili2ed to demonstrate the characteristics of shunt series ~dCOinpound gen~tors It is~ alsOusedastlle loading device

when testing the vari~us motors

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OPERATION The~CODnections tor operation as a cmnulative C()~po1l1ld nCgenshyeratorareshown in Figure 2 With these connectio~middotmiddotDltldeJ drive theJDCmiddotGENERATOR gen~-atapproxhnately1800RPM with a suitable p~e moVer With thefie1qrheostatJnits Jll8Ximum resistance fullyc1ocm~ position enshyergiZe thel15V DC field supply Rotate the field rheostatinthecltunter

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resistance load

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OUTPUT

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The MG Bedplateconsists of a heayy s~ baBe n10~~middotmiddoton vibration pads The

I - GENERAL

function otthe bedplate is toe~le the quickmounting ~dcoup1mg of the two individ~ macbiDoes to form a completemiddotmiddotm~ior-Pnerator setpwothreaded hpldshy

~ down)1Ocks ~d winged screwsareprovidecltoseeurethe F t claJnps which hold tbeinBcbinetsmounting boards A couplingguard and two shaft ~gwrrds are p~

r vided to p~ttheSiudenttrom accidet1talJito~gor~~gwires0l1 rotatshy- shy ing)arts The guardsmiddotare quickly mounted bY insertirig retamer CUpS in~T~9tsin

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The procedure for mou~ting and ioupling the machines to the base is as fon~

L 1 A~just each wing screw 021- ~e two screw clamp hold~ownmiddot ~locks to the top of its threaded stud - 0

i 2 Place each ~chine so that the rear of the base is reSting agairistmiddotthemiddot thd rear clamp on thei L- MGbasemiddot

8 Slide machines iJiboara until ~elrcouplingl1anPs are centered oVer cen~ slots 4 bert rub coupnngmiddotsleevemiddot~toone of the mac1dnes co~pling 1IimgM~ L

5 Slidere~jning machines coupling flange into-the other side of couplbig sleeve 6 Checktobe Sure thatmiddot~e couplhig guard will cOver coupling when insertedmiddotinto one ot thel pails areenter slotsmiddot 7 plaCe front clamp tor each of machines against the front or the two macbiD5t bases

(- s 8 F~pr tighten ~~uts 9it middotthe two screw clamp hold-down biocks Lmiddot 9 Mount coUplini aDd shaft guards by locating appropriate retainer clips in slotS so that coushy

pling is ~der co~Ung guard and ~ sh~ is covered by a ~haft guatdL

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MODIL1-10oaA TRANSFClRfJIER OEMONSTRATOR

GENEijAL The TlOO-8A~~ts of three Single-phase bansformers wit~ m11Jtiple primary and secondary taps terminated atpinreceptacl~on the front of the unit Each of the three ~rOrinersmay beused independen1q Or the threemay~interconmiddot

f nected mseries~1npQmneJ or inmiddot many poJyph8seCbnfigurations

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EacbtraDslormer is~~middot af)vol~amperesat 60 Hertz ~ has two primary~d

two secoDdaqwindiIlBL Each ofthe priD1817 windiD~1tas800 turns of Nobull 24 gauge-wire and JSmiddotm~-120volta 05 amperes Onewhidingis tapped at 82 volts toprovide~~middotS~tttllp~(866$)middot~fthemiddot twomiddotwiDd1np~ 68ri~ Each or thesecondshylQ7middotwindh1pmiddot1uIs100t11rns of No 21 gauge wire and israted 60 volts 10 ampere One winding Js tappbd atmiddotlaquo volts to p~vide a Scott tapor the two windings in series Shownbelow are the voltage ratings orthe various taps for each of the three traDspoundormers

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t bull MODEL middotRLmiddot100AmiddotRESISTANC~LOAD J J- shy~ GENERAL The RL-IOOAfs variable ftsistance unit used to applya resistivel0a4middottogenera

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tors or altemators One unit may be used in single-phase applications ora bank L of tlmae units may be combhled intQ Wye or De1taCOnt1IJDlt1~DS tor three phase

applicmioDS TiieRL-lOOA mttoduces resistieload~ ~sequentild steps r designed to prod11CB approximateiy equal ipcremeJlts otJoadmiddot~tmiddot The SPST f ~ toigle switches are numbered andmiddot must be cloSed in nUD1erl~ordertodecrease

totlreslstance~creasmglOad The total ~cemiddot or the cOb~ected~rs ( may be COmputed f~theequation L

middot 1 1 1-1 ~=R1+Ri+lt8middotmiddotmiddot

The ConowingO equations may be used to detemUne the power disSipated from a measurement of load currentor voltage

L P=EI = = I~

p (ampp) = 8 xEpBPH (tor balanced ioad)

Where P=P~inWatb

E =yoltage inVolfB I = Currentin Amperes

f R =Resistance in Ohms L P(Stp) =middotmiddotTotalPower for Three-Phase

~H ==~ Voltage per Phase~r Load Bankf L bull IpH = Ourrent per Phase ofLoad Bank ampshy

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~ SERIES 100 OPmiddotERATmiddotING INSTRUCTIONS

MODEL RLC-100RESmiddotISTANCE-REACTANmiddotCE LOAD

The RLCl00 ismiddota variable resistance and--reactance- (either ~ductive or capaci- tive) uDit that ~y be used _to apply a singl~plmse or a three-phase load The remstive load (w~ can be ~ for both middotACcd DC) is controDed by siz SPST toggle switches e8ch of which puts 2000 ohlnaof resistance in paraDelmiddot lor all three phases simultaneouslybullThe resistive-load is therefore always balanced The total resistance in eacli ph8se equals 2000- ohms divided by the Dumber of switches closed For example with two sWitehesclosedtbe total resistance-is 1000 ohms rith aUsiZ closed 8888 ohms Each or the three reactance loads (used forAC o~) separateVfused at 1 amp is controlled by a knob that varltlSthe degreeopound lead andmiddot l8g A clockwise rotationof the middotknob applies leadiIlg pOwer factor (cashypaCitive)loid while a counterc1~ rotation appIiesa lagging power factor (inductive) load There is DO lpadapplied whenthe-knob is in mid position

The 8-4-5 right triangle graph below may bemiddot~ to approximate a O~8 power factor leading or lagging

1 Appfi a resistiVe load 2 Readthe in-phase current h from -the ammeter 8 From the lR value on tlie horizontal base of the graph travel vertically to the

point where it intersects the 08 PF (total amps) line 4 Frommiddotthis point travel horizontally to the reactive current wlueIz 5 Adjust the ~ve load until the Ix ammeter reads this value of reactive cur

rent

6 To obtain a ~ced load in a three-phaseconfigaratioD repeat Step -5 for the other two~

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middotINDUCTANCEDIAL POSITIONmiddot (~middotQLJNT~RCmiddotLOCKWJSE)

-12 51 Henry

middot11 ~ 57 Henry

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-7 97 HefJry

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DIAL POSITION CAPACITANCE (CLOCKWISE)

0 69 llF

1 1~57 J1F

2 316 J1F

3 501Jlf

middot4 640J1F

5 80~J1f

6 985 j1f 7 1160middotpF

8 1360J1Fmiddot

9 1609middotJ1F

10 18~JtF

11 2007~middotF

12 2170 fLF

13 2513 )iFmiddot

14 2860J1F

15 3090 pFmiddot

15 3269JlF

17 3539 JlFmiddot (

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SERIES 100OPERATING INSTAUCTIONS L

- -

-

MODJL ACVA-10()ACMETERINGPANEL L GENERAL The HAMPDEN Model ACVA-1OO consistsmiddotol two AC ammetem and one AC voltshy

meterA11 or the meters are dioaeprot8cted against overloads as high 1Ui 1000f

The ~ltmeter islicctt8 within 8 w1UIemiddotthe ammeters are accurate wi~hin ~ plusmn29D ormiddotfWl sCale dellection The middotme~rshave the following ranges

r I AC Voltm~teI Oto l00~OO V~ts ~ AC Amme~ OtlJQ5f2f4l8-Amps

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OPERATION

AC AMMETERS

L 1 Connect the ammeter in series so that the middotentire AC current to be measured passes

I through the ~~ter The test lead from the dark blue middotbindingpostis connected to one

side or the Dne and the test lead trom the Qrange bin~ post to the other ~ L

2 ~e choice or measuring range is iet with the range switch Fourmiddotranges are avaiiable O 05 0204 an~ 0 - 8 amperes

8 Set the rangemiddotswitch on the 8 ampere range Detore turning on the power

a) When ~ to measure motor current put a jumper lead between the tWo binding poststo protect the movement from the large inrushcurrent at start This jumper is

(

removed after the motor has started

--~---~--~_--------~---_~_----ENGINEERfNG CORPORATION

MANUFACTURERSmiddotOF rpUIPMCNT F()R EDUCATION AND INDUSTRY

L POmiddotBoxS63 East Longmeadow MA 01028middot (413) 525-3981 bull TLX 9gt5426 bull Pax (413) S2S-474i

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MODELACWM-1 GO WATIMETER PANEL

GENERAL The1iAMPDEN Model ACWMmiddotI00 consists artwo Iilulti-rangewattmeters and

I tbe~tchesh-lh~r operation Eacli has ~e follOwing ranges l

)to 1~30016~1200W

(150300Volts 2148 Amps)

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OPERATION Measure wattage bymiddotconn8cling a wattmetervoltmeter andmiddot~ete~8sshownin Figtt81 The ~-MPstttOn mustO be~middotconn~middotin series- with the ioad and-the

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The Otlrrent~Coils are

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-FIGURE 1 WATTMETER CONNECnONS 14IJ -- -

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Balanced Load

F-4 Cent

Each wa~eter has tWomiddot Voltage mtinp (150 and- 800V)~ Rotating the range -switclirounterciOCkwise from OFF engages the 150 volt range Rotatmg the _range SWitch clOQkwise from O~ engages the 800 volt range Utilize the Voltmeters readiDg to determine the approprlllte-range

Each wattmetermiddot has three currentmiddot ratings (2 4 and SA) Rotating the range swiJchfrom middotO~engages the Samprarigefbst ~ the wattm~termiddotreadsbelow ~r 8Cll18 and the ammeter indicates that the 4 amp rating will not be ~e9 ~ectmiddotthe 4 ainp range-middot If the mttnie~ again reads below balt scaie and the ammeterindicates that the 2 amp rating will no~ bemiddot exceeded the 2 amp range may bese1ectedI

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L middot The totalwatbge is the sum of the two meter readings PI and P2

f When pow~ in a ~ced load is m~ured in this ~er the indication or the 1

two ~eterS VlLL~PT be the same except at 1D1ity power factor middot -shy

When the power factor of the circuit is less than 509b the pointer of meter PI will reverse~ To obtain total wattage in this case reverse the current connections to metet Pl -then subtract the rea~g ormeter PI from that of meter P2

The twO-wattmeter~method cannot be used with as-phase 4-wire load Three wattmeters are ~ in that case

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POWER FACTOR i f ~

Given a balallCed load the~oWer tacentor middoteanbe -d~emiined from the two wattmeter mth6cL - ~

L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

J be calca1ated -from-the -following_equation0

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tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

wherep2 repr~ts th~~ier~thetwoWl1ttiJ1~ re~ingswhentbepower faeto~l~other thaD uPity

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BiDet th~powertaetb~ 8q1alsthcosme ofthephaseangletP~powerfactor may also be I deterJninedfromtheratioo~thetwo wittmeterreadings middotmiddotThegraph b~ow shows the1 I

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MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

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DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

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agt If the currePtis~ter than 5 amperes the needlewDI move off-scale TuRN OFF POVER IMliEDIATELY AJf exception to this may be on motor starling Momenshytary current inrushbullmay exceed 5 ampe~ but theneedleiminediately drops back to normal

b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

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1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

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a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

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MODEL-1723 rACHoME~R

DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

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MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

L bull Fieci120VAC 15A~u~tWod~plex receptacles bull ~12OVAC single-pJiase2-~lOA bull FiX~208120VAC~phase 4-wire15A bull VariabJe 0 ~ 24oI14QVAC8-~i~~9A

f bull -Vari8bleO ~ 150vnQ-i~(lA isolated l~RMS L bull Variable 0 ~ 125VDCt 5Q -isolated ItlmiddotRMS middot

OPEBATIONTouSe the powermiddotpanelt (lISt tum ON ~MAIN AC circuit breaker~i This will m~tethemain AC pnot Hght and 9nergize the four-pin ~Pyen~i supplying fix~208120VAOtliree-phase poWer Th~ other 1ixed~d~Je sulpHes may

l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

cuit ~~ (both ~ ~ncl BEc) A clockwise lOtation of the vol~cpntro1 -- ~ ~eause ~~~~the voltage a~ble at the appropriate 1~Ptashy

L I tNOTE ~~ ~~ltage oo~~lbob fOr the 0-208120V three-phase sUpply is ~ted at the ~nd or the

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IfanY~r~es11PplifSri-e~vefloaded one or more circuit breakers may trip middotOFF Al- ir ways turnthemiddotVariable suppllesto zero and remove the C8usaopound the oyerload before resetshy

JL ting the circuitmiddotl~~em

A pindiilg ~ groun4 oenn~oDis proVided at each end or the panel fOrgrounding the rotating macbin~

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MODEL WRM-100-3A WOUND-ROTOR MOTOR

GENERAL The WRY-100-SA is a three-phase four pole wound-rotor motorconsisting of a stator winding and a rotor winding withldip rings and brushes A three-pole

~ circuit breaker ~ also provided in the termm81 box The nominal ratings of the motor ari~ circuit breaker are listed below r

1 J l-- SPECIFICATIONS MOTORL

WmdingTypeshy Wound Btafor amp Rotor Horsepower shy 13HP Speed shy 175QRPM Voltage bull 20SV bull Sf Amiddot or 860V-s+Y

I Frequency- 60Hz L- Rating Continuous

Full Load Current bull 17 Amps

CIRCUIT BREAKER

Type of Operator bull Rocker Switch L No of PoleS bull Three

Overload )pe bull Thermal Trip Rating shy 2DAmpS Reset Method - middotOW- to Reset

r I - shy OPERATION To operatethe ~-l00-SAas an induction motor make the connections shown

in Figure L Rotate the Wound Rotor Speed Control ~b to the maximum resisshytance fttn~ counterclockwise direction With all th~ ~ce in the rotor cir middotcai~ the motor-willdevelop maxirilum starting torque and minimum ~g curshy

rent Pwih up the rocker switch on the circuit breaker~ startmiddottqemotorbull The motor will accelerateup to speed The rheostat providesthe mSansofv~g theL motors lQieedtorque characteristicS The effect of the rlieostat increUes with increasing load onthe motorr ~

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WRSe-100

FIGURE 1

ENGfNEERING CORPORATION ------- MANUFACTURERS 01= EQUIPMENT lOR EDUCATION AND INDUSTlY

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GENERAL

SPECIFICATIONS

middotMODEL SMmiddot100middot3ASYNCHRONOUS MACHINE

ThemiddotSMmiddotI00-8A is a three-phase four-pole machine consisting of a wyedel~ stashytor andmiddot 8 quadrature rotor having a DC field winding and a damper winding A three-pole circUit breaker and a IND START-BYNC RUN switch are provided in the terminal OOx- RatingS fonow

SM-100-3A MOTOR ampALTERNATOR

Speed - 1800 RPM Voltagemiddot Max Ambient Temp Insulation bull Rating bull

CIRCUIT BREAKER

Type of~tor shyNo ofPoles bull Overload Type bull Trip Rating bull Reset Methoa shy

ALTERNATOR

Power-Load Current bull Fielti Excitation shy

MOTOR

HorSepowershyCurrent bull Frequencyshy

208120V-B+-4W 4~ (1047) ClassmiddotB Continuous

Rocker Three Thermal L7amps

middot middotOFF to Reset

250 watts 07 amp (nominal) Separate L6 amps

18 HP 17 Amps 60Hz

ENGINEERING COAPORATION --~-MANUf~RpoundRS~ EQUIPMENT lOR EDUCATION ANO INDUSTRY

Po Box 563 East Lon~~dow~ O~028 (413) 525-3981 bull 1tX95-S426 bull Pax (413) 525-4741

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OPERATION Th~ proper connections tor operation of th~ SMl00-SA ~ a ~clttonous (SYNCHRONOUS motor are shown in Figure middot1 With ~ ~tebin the SYNC RUNposiliou MOTOR) ~ze the vari~ble DC supply and adjusttbe~tput voltage from zero up to

th~ value which eauses 1 amp to flow through the rotor ~turn the switch to the lNDSTART PO$ition middotand Start the motor by toggling~becircuit breaker to

the ONposltion WJten the motor reaches DO lQad 1ij)eeC1 move the switch to the SYNC RUN posItion The rotor will then sYnchronize with the nn~ and fJ1e motor wiD be ti1mrlng at exactly 1800 RPvL Used to demonstrate the Wrious ~tics of synclirOnous motors

+VARIABlpound DC

_sUPPLY

STATOR ROTOR middotL1middot 11 A~~-eJ-----CJ

middot AC u l 12

~~YB~T middotJ3~T3

ct-O--ltr

VARIABLE + DC SUPPLY

FIGURE 1 SM-10o-3A AS A SYNCHRONOUS MoioR

ABC AC SUPPLY INPUT

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OPERATION The proper ampinn~~ fo~ operation or the SM-l00-SA as an alternator are ALTERNATOR) shown in Fi8Ure ~ With tliese connections made and the switch in the SYNCL RUNposition drive the alternator at 1800 RPM With a sUitable prime mover

Energize the DC Voltage supply and increase thesupplys output to bicrease f themiddotslternatorts output voltage to the desired value Toggle the circuit breaker ~L ~ tlie ON pPSition to connect the alternators output to the load Used to

middotdemonstrate the characteristics of a polyphase alternator of the stationary arshyr mature typebull ~t may also be used asthe loading device when testing the varishyI oUsmotom- shy

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OUTPUT

rmiddot~ FIGURE 2 L SM-10o-3A AS AN ALTERNATOR

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oMOoDEL DMmiddot1 DDA DC MACHINE

GENERAL The DY-10OA is amiddot two-pole compound-wound machine ~g of a shunt field a series field and an armature winding A shunt fie1dmiddotr~t and two-pole startel switM are also provided in the-terminal box ~tings follow

SPECIFICAnONS

MACHINE

Shunt Field Ex SepO5A 125V Insulation CJass F middotMax Ambient Temp 40 ~C (104 OF) Rating Continl101iS Speed 1800 RPM nominal Shunt Series Compound wo~dJl1Otcr

125V SOAt 18 HP Shunt Series Compound wound generator

RHEOSTAT

Resistance Power Current middot Taper Fuse Minimum Resistance Position

STARTER

Type of Operator No of Poles Overload Type Trip Rating middot Reset Method

125V 2A 250KW

800~Ohms

100 Watts O575middotAmps Lin ear 1A SJo Blo

Toggle Two Thermal 4lAmps Push Toggle down

ENGI-NEERING CORPORATION ----MANUFACTURERS OF eoulPUEHT FOR EDUCATION ANOINOUSTRY

r Po Box ~3J East Longmeadow MA 01028 (413) 525-381 bull nx 9S-S~26 Pax (413) 525-4741

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L FUNCTION The primDrJ function or the DC motor is to demonstrate the characteristics of

shunt series ancl compOund motors~ It IIl8Y also bemiddotutiHzed as a prime mover when testiJlg a gel1eraloror alternator Using the DCmiddotmotor tor this PurPose has the advantage th~tbe speed may be held constant bymiddot8djusting tJie shunt field rheostat after each load step is applied

L OPERATION The -proper connections for operation as a ClUDulative compound DC motor are

(DC MOTOR) shOWDin Fipre i Withmiddot theseoonndionS made the motor may be started by moving the starter switch toggle up to the ON position It is good praetioe to stad the motor with the shunt field rh~ in its minimum resistance fully COW position to provide m8amum starting torque andmiDitnum starting Curshy

L rent The motor may then be adjusted ~ the desired speed byadjUBtingtbe field rheostat or varying the line voltage

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1 125VDO SUPPLY

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+ 125V DC SUPPLY

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FUNCTION The DC generator is p~arily utili2ed to demonstrate the characteristics of shunt series ~dCOinpound gen~tors It is~ alsOusedastlle loading device

when testing the vari~us motors

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OPERATION The~CODnections tor operation as a cmnulative C()~po1l1ld nCgenshyeratorareshown in Figure 2 With these connectio~middotmiddotDltldeJ drive theJDCmiddotGENERATOR gen~-atapproxhnately1800RPM with a suitable p~e moVer With thefie1qrheostatJnits Jll8Ximum resistance fullyc1ocm~ position enshyergiZe thel15V DC field supply Rotate the field rheostatinthecltunter

shy clockwisedir$ctian middottoinCreasemiddot the output voltage middotto the desiredmiddot value Switch Oti~middotthemiddotoverloadmiddot switChmiddotto connect the generators output to the

resistance load

+ 1151 DC - 230 W

OUTPUT

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FIGURE 2DC G~NERATOR)

ENGINEERING CORPORATION MANUFACTURERS Oyen eoutPUampNT FOR EDUCATION AND IHOUSTRY

Po Box S63 East Longmeadow -MA 01028 (413) S2S-3981 bull TLX 95-5426 bull p~ (413) 525-4741

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MODEL MGmiddotBmiddot100DG BEDPLATE f

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The MG Bedplateconsists of a heayy s~ baBe n10~~middotmiddoton vibration pads The

I - GENERAL

function otthe bedplate is toe~le the quickmounting ~dcoup1mg of the two individ~ macbiDoes to form a completemiddotmiddotm~ior-Pnerator setpwothreaded hpldshy

~ down)1Ocks ~d winged screwsareprovidecltoseeurethe F t claJnps which hold tbeinBcbinetsmounting boards A couplingguard and two shaft ~gwrrds are p~

r vided to p~ttheSiudenttrom accidet1talJito~gor~~gwires0l1 rotatshy- shy ing)arts The guardsmiddotare quickly mounted bY insertirig retamer CUpS in~T~9tsin

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The procedure for mou~ting and ioupling the machines to the base is as fon~

L 1 A~just each wing screw 021- ~e two screw clamp hold~ownmiddot ~locks to the top of its threaded stud - 0

i 2 Place each ~chine so that the rear of the base is reSting agairistmiddotthemiddot thd rear clamp on thei L- MGbasemiddot

8 Slide machines iJiboara until ~elrcouplingl1anPs are centered oVer cen~ slots 4 bert rub coupnngmiddotsleevemiddot~toone of the mac1dnes co~pling 1IimgM~ L

5 Slidere~jning machines coupling flange into-the other side of couplbig sleeve 6 Checktobe Sure thatmiddot~e couplhig guard will cOver coupling when insertedmiddotinto one ot thel pails areenter slotsmiddot 7 plaCe front clamp tor each of machines against the front or the two macbiD5t bases

(- s 8 F~pr tighten ~~uts 9it middotthe two screw clamp hold-down biocks Lmiddot 9 Mount coUplini aDd shaft guards by locating appropriate retainer clips in slotS so that coushy

pling is ~der co~Ung guard and ~ sh~ is covered by a ~haft guatdL

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MODIL1-10oaA TRANSFClRfJIER OEMONSTRATOR

GENEijAL The TlOO-8A~~ts of three Single-phase bansformers wit~ m11Jtiple primary and secondary taps terminated atpinreceptacl~on the front of the unit Each of the three ~rOrinersmay beused independen1q Or the threemay~interconmiddot

f nected mseries~1npQmneJ or inmiddot many poJyph8seCbnfigurations

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EacbtraDslormer is~~middot af)vol~amperesat 60 Hertz ~ has two primary~d

two secoDdaqwindiIlBL Each ofthe priD1817 windiD~1tas800 turns of Nobull 24 gauge-wire and JSmiddotm~-120volta 05 amperes Onewhidingis tapped at 82 volts toprovide~~middotS~tttllp~(866$)middot~fthemiddot twomiddotwiDd1np~ 68ri~ Each or thesecondshylQ7middotwindh1pmiddot1uIs100t11rns of No 21 gauge wire and israted 60 volts 10 ampere One winding Js tappbd atmiddotlaquo volts to p~vide a Scott tapor the two windings in series Shownbelow are the voltage ratings orthe various taps for each of the three traDspoundormers

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t bull MODEL middotRLmiddot100AmiddotRESISTANC~LOAD J J- shy~ GENERAL The RL-IOOAfs variable ftsistance unit used to applya resistivel0a4middottogenera

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tors or altemators One unit may be used in single-phase applications ora bank L of tlmae units may be combhled intQ Wye or De1taCOnt1IJDlt1~DS tor three phase

applicmioDS TiieRL-lOOA mttoduces resistieload~ ~sequentild steps r designed to prod11CB approximateiy equal ipcremeJlts otJoadmiddot~tmiddot The SPST f ~ toigle switches are numbered andmiddot must be cloSed in nUD1erl~ordertodecrease

totlreslstance~creasmglOad The total ~cemiddot or the cOb~ected~rs ( may be COmputed f~theequation L

middot 1 1 1-1 ~=R1+Ri+lt8middotmiddotmiddot

The ConowingO equations may be used to detemUne the power disSipated from a measurement of load currentor voltage

L P=EI = = I~

p (ampp) = 8 xEpBPH (tor balanced ioad)

Where P=P~inWatb

E =yoltage inVolfB I = Currentin Amperes

f R =Resistance in Ohms L P(Stp) =middotmiddotTotalPower for Three-Phase

~H ==~ Voltage per Phase~r Load Bankf L bull IpH = Ourrent per Phase ofLoad Bank ampshy

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MODEL RLC-100RESmiddotISTANCE-REACTANmiddotCE LOAD

The RLCl00 ismiddota variable resistance and--reactance- (either ~ductive or capaci- tive) uDit that ~y be used _to apply a singl~plmse or a three-phase load The remstive load (w~ can be ~ for both middotACcd DC) is controDed by siz SPST toggle switches e8ch of which puts 2000 ohlnaof resistance in paraDelmiddot lor all three phases simultaneouslybullThe resistive-load is therefore always balanced The total resistance in eacli ph8se equals 2000- ohms divided by the Dumber of switches closed For example with two sWitehesclosedtbe total resistance-is 1000 ohms rith aUsiZ closed 8888 ohms Each or the three reactance loads (used forAC o~) separateVfused at 1 amp is controlled by a knob that varltlSthe degreeopound lead andmiddot l8g A clockwise rotationof the middotknob applies leadiIlg pOwer factor (cashypaCitive)loid while a counterc1~ rotation appIiesa lagging power factor (inductive) load There is DO lpadapplied whenthe-knob is in mid position

The 8-4-5 right triangle graph below may bemiddot~ to approximate a O~8 power factor leading or lagging

1 Appfi a resistiVe load 2 Readthe in-phase current h from -the ammeter 8 From the lR value on tlie horizontal base of the graph travel vertically to the

point where it intersects the 08 PF (total amps) line 4 Frommiddotthis point travel horizontally to the reactive current wlueIz 5 Adjust the ~ve load until the Ix ammeter reads this value of reactive cur

rent

6 To obtain a ~ced load in a three-phaseconfigaratioD repeat Step -5 for the other two~

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middotINDUCTANCEDIAL POSITIONmiddot (~middotQLJNT~RCmiddotLOCKWJSE)

-12 51 Henry

middot11 ~ 57 Henry

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DIAL POSITION CAPACITANCE (CLOCKWISE)

0 69 llF

1 1~57 J1F

2 316 J1F

3 501Jlf

middot4 640J1F

5 80~J1f

6 985 j1f 7 1160middotpF

8 1360J1Fmiddot

9 1609middotJ1F

10 18~JtF

11 2007~middotF

12 2170 fLF

13 2513 )iFmiddot

14 2860J1F

15 3090 pFmiddot

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SERIES 100OPERATING INSTAUCTIONS L

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MODJL ACVA-10()ACMETERINGPANEL L GENERAL The HAMPDEN Model ACVA-1OO consistsmiddotol two AC ammetem and one AC voltshy

meterA11 or the meters are dioaeprot8cted against overloads as high 1Ui 1000f

The ~ltmeter islicctt8 within 8 w1UIemiddotthe ammeters are accurate wi~hin ~ plusmn29D ormiddotfWl sCale dellection The middotme~rshave the following ranges

r I AC Voltm~teI Oto l00~OO V~ts ~ AC Amme~ OtlJQ5f2f4l8-Amps

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OPERATION

AC AMMETERS

L 1 Connect the ammeter in series so that the middotentire AC current to be measured passes

I through the ~~ter The test lead from the dark blue middotbindingpostis connected to one

side or the Dne and the test lead trom the Qrange bin~ post to the other ~ L

2 ~e choice or measuring range is iet with the range switch Fourmiddotranges are avaiiable O 05 0204 an~ 0 - 8 amperes

8 Set the rangemiddotswitch on the 8 ampere range Detore turning on the power

a) When ~ to measure motor current put a jumper lead between the tWo binding poststo protect the movement from the large inrushcurrent at start This jumper is

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removed after the motor has started

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MODELACWM-1 GO WATIMETER PANEL

GENERAL The1iAMPDEN Model ACWMmiddotI00 consists artwo Iilulti-rangewattmeters and

I tbe~tchesh-lh~r operation Eacli has ~e follOwing ranges l

)to 1~30016~1200W

(150300Volts 2148 Amps)

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OPERATION Measure wattage bymiddotconn8cling a wattmetervoltmeter andmiddot~ete~8sshownin Figtt81 The ~-MPstttOn mustO be~middotconn~middotin series- with the ioad and-the

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VQTS con mUstmiddotbeqo~n~middotiJ1 prU9l1elwith the load protected against overloads by diodes

The Otlrrent~Coils are

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-FIGURE 1 WATTMETER CONNECnONS 14IJ -- -

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Each wa~eter has tWomiddot Voltage mtinp (150 and- 800V)~ Rotating the range -switclirounterciOCkwise from OFF engages the 150 volt range Rotatmg the _range SWitch clOQkwise from O~ engages the 800 volt range Utilize the Voltmeters readiDg to determine the approprlllte-range

Each wattmetermiddot has three currentmiddot ratings (2 4 and SA) Rotating the range swiJchfrom middotO~engages the Samprarigefbst ~ the wattm~termiddotreadsbelow ~r 8Cll18 and the ammeter indicates that the 4 amp rating will not be ~e9 ~ectmiddotthe 4 ainp range-middot If the mttnie~ again reads below balt scaie and the ammeterindicates that the 2 amp rating will no~ bemiddot exceeded the 2 amp range may bese1ectedI

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L FIGURE 2 WATTMETER CONNECTIONS 3fi1

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L middot The totalwatbge is the sum of the two meter readings PI and P2

f When pow~ in a ~ced load is m~ured in this ~er the indication or the 1

two ~eterS VlLL~PT be the same except at 1D1ity power factor middot -shy

When the power factor of the circuit is less than 509b the pointer of meter PI will reverse~ To obtain total wattage in this case reverse the current connections to metet Pl -then subtract the rea~g ormeter PI from that of meter P2

The twO-wattmeter~method cannot be used with as-phase 4-wire load Three wattmeters are ~ in that case

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POWER FACTOR i f ~

Given a balallCed load the~oWer tacentor middoteanbe -d~emiined from the two wattmeter mth6cL - ~

L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

J be calca1ated -from-the -following_equation0

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tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

wherep2 repr~ts th~~ier~thetwoWl1ttiJ1~ re~ingswhentbepower faeto~l~other thaD uPity

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BiDet th~powertaetb~ 8q1alsthcosme ofthephaseangletP~powerfactor may also be I deterJninedfromtheratioo~thetwo wittmeterreadings middotmiddotThegraph b~ow shows the1 I

I relationship between themiddotpowerfacior andth~ratio~f P1lP2 ~

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MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

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DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

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agt If the currePtis~ter than 5 amperes the needlewDI move off-scale TuRN OFF POVER IMliEDIATELY AJf exception to this may be on motor starling Momenshytary current inrushbullmay exceed 5 ampe~ but theneedleiminediately drops back to normal

b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

L

1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

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a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

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MODEL-1723 rACHoME~R

DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

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L SERIESmiddot1-00OPERATIN~middot INSJRUCTIONS~middot

MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

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OPEBATIONTouSe the powermiddotpanelt (lISt tum ON ~MAIN AC circuit breaker~i This will m~tethemain AC pnot Hght and 9nergize the four-pin ~Pyen~i supplying fix~208120VAOtliree-phase poWer Th~ other 1ixed~d~Je sulpHes may

l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

cuit ~~ (both ~ ~ncl BEc) A clockwise lOtation of the vol~cpntro1 -- ~ ~eause ~~~~the voltage a~ble at the appropriate 1~Ptashy

L I tNOTE ~~ ~~ltage oo~~lbob fOr the 0-208120V three-phase sUpply is ~ted at the ~nd or the

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IfanY~r~es11PplifSri-e~vefloaded one or more circuit breakers may trip middotOFF Al- ir ways turnthemiddotVariable suppllesto zero and remove the C8usaopound the oyerload before resetshy

JL ting the circuitmiddotl~~em

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MODEL WRM-100-3A WOUND-ROTOR MOTOR

GENERAL The WRY-100-SA is a three-phase four pole wound-rotor motorconsisting of a stator winding and a rotor winding withldip rings and brushes A three-pole

~ circuit breaker ~ also provided in the termm81 box The nominal ratings of the motor ari~ circuit breaker are listed below r

1 J l-- SPECIFICATIONS MOTORL

WmdingTypeshy Wound Btafor amp Rotor Horsepower shy 13HP Speed shy 175QRPM Voltage bull 20SV bull Sf Amiddot or 860V-s+Y

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Full Load Current bull 17 Amps

CIRCUIT BREAKER

Type of Operator bull Rocker Switch L No of PoleS bull Three

Overload )pe bull Thermal Trip Rating shy 2DAmpS Reset Method - middotOW- to Reset

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in Figure L Rotate the Wound Rotor Speed Control ~b to the maximum resisshytance fttn~ counterclockwise direction With all th~ ~ce in the rotor cir middotcai~ the motor-willdevelop maxirilum starting torque and minimum ~g curshy

rent Pwih up the rocker switch on the circuit breaker~ startmiddottqemotorbull The motor will accelerateup to speed The rheostat providesthe mSansofv~g theL motors lQieedtorque characteristicS The effect of the rlieostat increUes with increasing load onthe motorr ~

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GENERAL

SPECIFICATIONS

middotMODEL SMmiddot100middot3ASYNCHRONOUS MACHINE

ThemiddotSMmiddotI00-8A is a three-phase four-pole machine consisting of a wyedel~ stashytor andmiddot 8 quadrature rotor having a DC field winding and a damper winding A three-pole circUit breaker and a IND START-BYNC RUN switch are provided in the terminal OOx- RatingS fonow

SM-100-3A MOTOR ampALTERNATOR

Speed - 1800 RPM Voltagemiddot Max Ambient Temp Insulation bull Rating bull

CIRCUIT BREAKER

Type of~tor shyNo ofPoles bull Overload Type bull Trip Rating bull Reset Methoa shy

ALTERNATOR

Power-Load Current bull Fielti Excitation shy

MOTOR

HorSepowershyCurrent bull Frequencyshy

208120V-B+-4W 4~ (1047) ClassmiddotB Continuous

Rocker Three Thermal L7amps

middot middotOFF to Reset

250 watts 07 amp (nominal) Separate L6 amps

18 HP 17 Amps 60Hz

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OPERATION Th~ proper connections tor operation of th~ SMl00-SA ~ a ~clttonous (SYNCHRONOUS motor are shown in Figure middot1 With ~ ~tebin the SYNC RUNposiliou MOTOR) ~ze the vari~ble DC supply and adjusttbe~tput voltage from zero up to

th~ value which eauses 1 amp to flow through the rotor ~turn the switch to the lNDSTART PO$ition middotand Start the motor by toggling~becircuit breaker to

the ONposltion WJten the motor reaches DO lQad 1ij)eeC1 move the switch to the SYNC RUN posItion The rotor will then sYnchronize with the nn~ and fJ1e motor wiD be ti1mrlng at exactly 1800 RPvL Used to demonstrate the Wrious ~tics of synclirOnous motors

+VARIABlpound DC

_sUPPLY

STATOR ROTOR middotL1middot 11 A~~-eJ-----CJ

middot AC u l 12

~~YB~T middotJ3~T3

ct-O--ltr

VARIABLE + DC SUPPLY

FIGURE 1 SM-10o-3A AS A SYNCHRONOUS MoioR

ABC AC SUPPLY INPUT

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OPERATION The proper ampinn~~ fo~ operation or the SM-l00-SA as an alternator are ALTERNATOR) shown in Fi8Ure ~ With tliese connections made and the switch in the SYNCL RUNposition drive the alternator at 1800 RPM With a sUitable prime mover

Energize the DC Voltage supply and increase thesupplys output to bicrease f themiddotslternatorts output voltage to the desired value Toggle the circuit breaker ~L ~ tlie ON pPSition to connect the alternators output to the load Used to

middotdemonstrate the characteristics of a polyphase alternator of the stationary arshyr mature typebull ~t may also be used asthe loading device when testing the varishyI oUsmotom- shy

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OUTPUT

rmiddot~ FIGURE 2 L SM-10o-3A AS AN ALTERNATOR

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SERJES100 OPERATING INStRUCTIONS

oMOoDEL DMmiddot1 DDA DC MACHINE

GENERAL The DY-10OA is amiddot two-pole compound-wound machine ~g of a shunt field a series field and an armature winding A shunt fie1dmiddotr~t and two-pole startel switM are also provided in the-terminal box ~tings follow

SPECIFICAnONS

MACHINE

Shunt Field Ex SepO5A 125V Insulation CJass F middotMax Ambient Temp 40 ~C (104 OF) Rating Continl101iS Speed 1800 RPM nominal Shunt Series Compound wo~dJl1Otcr

125V SOAt 18 HP Shunt Series Compound wound generator

RHEOSTAT

Resistance Power Current middot Taper Fuse Minimum Resistance Position

STARTER

Type of Operator No of Poles Overload Type Trip Rating middot Reset Method

125V 2A 250KW

800~Ohms

100 Watts O575middotAmps Lin ear 1A SJo Blo

Toggle Two Thermal 4lAmps Push Toggle down

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L FUNCTION The primDrJ function or the DC motor is to demonstrate the characteristics of

shunt series ancl compOund motors~ It IIl8Y also bemiddotutiHzed as a prime mover when testiJlg a gel1eraloror alternator Using the DCmiddotmotor tor this PurPose has the advantage th~tbe speed may be held constant bymiddot8djusting tJie shunt field rheostat after each load step is applied

L OPERATION The -proper connections for operation as a ClUDulative compound DC motor are

(DC MOTOR) shOWDin Fipre i Withmiddot theseoonndionS made the motor may be started by moving the starter switch toggle up to the ON position It is good praetioe to stad the motor with the shunt field rh~ in its minimum resistance fully COW position to provide m8amum starting torque andmiDitnum starting Curshy

L rent The motor may then be adjusted ~ the desired speed byadjUBtingtbe field rheostat or varying the line voltage

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1 125VDO SUPPLY

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FUNCTION The DC generator is p~arily utili2ed to demonstrate the characteristics of shunt series ~dCOinpound gen~tors It is~ alsOusedastlle loading device

when testing the vari~us motors

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OPERATION The~CODnections tor operation as a cmnulative C()~po1l1ld nCgenshyeratorareshown in Figure 2 With these connectio~middotmiddotDltldeJ drive theJDCmiddotGENERATOR gen~-atapproxhnately1800RPM with a suitable p~e moVer With thefie1qrheostatJnits Jll8Ximum resistance fullyc1ocm~ position enshyergiZe thel15V DC field supply Rotate the field rheostatinthecltunter

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resistance load

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OUTPUT

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I - GENERAL

function otthe bedplate is toe~le the quickmounting ~dcoup1mg of the two individ~ macbiDoes to form a completemiddotmiddotm~ior-Pnerator setpwothreaded hpldshy

~ down)1Ocks ~d winged screwsareprovidecltoseeurethe F t claJnps which hold tbeinBcbinetsmounting boards A couplingguard and two shaft ~gwrrds are p~

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The procedure for mou~ting and ioupling the machines to the base is as fon~

L 1 A~just each wing screw 021- ~e two screw clamp hold~ownmiddot ~locks to the top of its threaded stud - 0

i 2 Place each ~chine so that the rear of the base is reSting agairistmiddotthemiddot thd rear clamp on thei L- MGbasemiddot

8 Slide machines iJiboara until ~elrcouplingl1anPs are centered oVer cen~ slots 4 bert rub coupnngmiddotsleevemiddot~toone of the mac1dnes co~pling 1IimgM~ L

5 Slidere~jning machines coupling flange into-the other side of couplbig sleeve 6 Checktobe Sure thatmiddot~e couplhig guard will cOver coupling when insertedmiddotinto one ot thel pails areenter slotsmiddot 7 plaCe front clamp tor each of machines against the front or the two macbiD5t bases

(- s 8 F~pr tighten ~~uts 9it middotthe two screw clamp hold-down biocks Lmiddot 9 Mount coUplini aDd shaft guards by locating appropriate retainer clips in slotS so that coushy

pling is ~der co~Ung guard and ~ sh~ is covered by a ~haft guatdL

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MODIL1-10oaA TRANSFClRfJIER OEMONSTRATOR

GENEijAL The TlOO-8A~~ts of three Single-phase bansformers wit~ m11Jtiple primary and secondary taps terminated atpinreceptacl~on the front of the unit Each of the three ~rOrinersmay beused independen1q Or the threemay~interconmiddot

f nected mseries~1npQmneJ or inmiddot many poJyph8seCbnfigurations

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two secoDdaqwindiIlBL Each ofthe priD1817 windiD~1tas800 turns of Nobull 24 gauge-wire and JSmiddotm~-120volta 05 amperes Onewhidingis tapped at 82 volts toprovide~~middotS~tttllp~(866$)middot~fthemiddot twomiddotwiDd1np~ 68ri~ Each or thesecondshylQ7middotwindh1pmiddot1uIs100t11rns of No 21 gauge wire and israted 60 volts 10 ampere One winding Js tappbd atmiddotlaquo volts to p~vide a Scott tapor the two windings in series Shownbelow are the voltage ratings orthe various taps for each of the three traDspoundormers

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t bull MODEL middotRLmiddot100AmiddotRESISTANC~LOAD J J- shy~ GENERAL The RL-IOOAfs variable ftsistance unit used to applya resistivel0a4middottogenera

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tors or altemators One unit may be used in single-phase applications ora bank L of tlmae units may be combhled intQ Wye or De1taCOnt1IJDlt1~DS tor three phase

applicmioDS TiieRL-lOOA mttoduces resistieload~ ~sequentild steps r designed to prod11CB approximateiy equal ipcremeJlts otJoadmiddot~tmiddot The SPST f ~ toigle switches are numbered andmiddot must be cloSed in nUD1erl~ordertodecrease

totlreslstance~creasmglOad The total ~cemiddot or the cOb~ected~rs ( may be COmputed f~theequation L

middot 1 1 1-1 ~=R1+Ri+lt8middotmiddotmiddot

The ConowingO equations may be used to detemUne the power disSipated from a measurement of load currentor voltage

L P=EI = = I~

p (ampp) = 8 xEpBPH (tor balanced ioad)

Where P=P~inWatb

E =yoltage inVolfB I = Currentin Amperes

f R =Resistance in Ohms L P(Stp) =middotmiddotTotalPower for Three-Phase

~H ==~ Voltage per Phase~r Load Bankf L bull IpH = Ourrent per Phase ofLoad Bank ampshy

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~ SERIES 100 OPmiddotERATmiddotING INSTRUCTIONS

MODEL RLC-100RESmiddotISTANCE-REACTANmiddotCE LOAD

The RLCl00 ismiddota variable resistance and--reactance- (either ~ductive or capaci- tive) uDit that ~y be used _to apply a singl~plmse or a three-phase load The remstive load (w~ can be ~ for both middotACcd DC) is controDed by siz SPST toggle switches e8ch of which puts 2000 ohlnaof resistance in paraDelmiddot lor all three phases simultaneouslybullThe resistive-load is therefore always balanced The total resistance in eacli ph8se equals 2000- ohms divided by the Dumber of switches closed For example with two sWitehesclosedtbe total resistance-is 1000 ohms rith aUsiZ closed 8888 ohms Each or the three reactance loads (used forAC o~) separateVfused at 1 amp is controlled by a knob that varltlSthe degreeopound lead andmiddot l8g A clockwise rotationof the middotknob applies leadiIlg pOwer factor (cashypaCitive)loid while a counterc1~ rotation appIiesa lagging power factor (inductive) load There is DO lpadapplied whenthe-knob is in mid position

The 8-4-5 right triangle graph below may bemiddot~ to approximate a O~8 power factor leading or lagging

1 Appfi a resistiVe load 2 Readthe in-phase current h from -the ammeter 8 From the lR value on tlie horizontal base of the graph travel vertically to the

point where it intersects the 08 PF (total amps) line 4 Frommiddotthis point travel horizontally to the reactive current wlueIz 5 Adjust the ~ve load until the Ix ammeter reads this value of reactive cur

rent

6 To obtain a ~ced load in a three-phaseconfigaratioD repeat Step -5 for the other two~

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DIAL POSITION CAPACITANCE (CLOCKWISE)

0 69 llF

1 1~57 J1F

2 316 J1F

3 501Jlf

middot4 640J1F

5 80~J1f

6 985 j1f 7 1160middotpF

8 1360J1Fmiddot

9 1609middotJ1F

10 18~JtF

11 2007~middotF

12 2170 fLF

13 2513 )iFmiddot

14 2860J1F

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SERIES 100OPERATING INSTAUCTIONS L

- -

-

MODJL ACVA-10()ACMETERINGPANEL L GENERAL The HAMPDEN Model ACVA-1OO consistsmiddotol two AC ammetem and one AC voltshy

meterA11 or the meters are dioaeprot8cted against overloads as high 1Ui 1000f

The ~ltmeter islicctt8 within 8 w1UIemiddotthe ammeters are accurate wi~hin ~ plusmn29D ormiddotfWl sCale dellection The middotme~rshave the following ranges

r I AC Voltm~teI Oto l00~OO V~ts ~ AC Amme~ OtlJQ5f2f4l8-Amps

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OPERATION

AC AMMETERS

L 1 Connect the ammeter in series so that the middotentire AC current to be measured passes

I through the ~~ter The test lead from the dark blue middotbindingpostis connected to one

side or the Dne and the test lead trom the Qrange bin~ post to the other ~ L

2 ~e choice or measuring range is iet with the range switch Fourmiddotranges are avaiiable O 05 0204 an~ 0 - 8 amperes

8 Set the rangemiddotswitch on the 8 ampere range Detore turning on the power

a) When ~ to measure motor current put a jumper lead between the tWo binding poststo protect the movement from the large inrushcurrent at start This jumper is

(

removed after the motor has started

--~---~--~_--------~---_~_----ENGINEERfNG CORPORATION

MANUFACTURERSmiddotOF rpUIPMCNT F()R EDUCATION AND INDUSTRY

L POmiddotBoxS63 East Longmeadow MA 01028middot (413) 525-3981 bull TLX 9gt5426 bull Pax (413) S2S-474i

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MODELACWM-1 GO WATIMETER PANEL

GENERAL The1iAMPDEN Model ACWMmiddotI00 consists artwo Iilulti-rangewattmeters and

I tbe~tchesh-lh~r operation Eacli has ~e follOwing ranges l

)to 1~30016~1200W

(150300Volts 2148 Amps)

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OPERATION Measure wattage bymiddotconn8cling a wattmetervoltmeter andmiddot~ete~8sshownin Figtt81 The ~-MPstttOn mustO be~middotconn~middotin series- with the ioad and-the

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VQTS con mUstmiddotbeqo~n~middotiJ1 prU9l1elwith the load protected against overloads by diodes

The Otlrrent~Coils are

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-FIGURE 1 WATTMETER CONNECnONS 14IJ -- -

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Balanced Load

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Each wa~eter has tWomiddot Voltage mtinp (150 and- 800V)~ Rotating the range -switclirounterciOCkwise from OFF engages the 150 volt range Rotatmg the _range SWitch clOQkwise from O~ engages the 800 volt range Utilize the Voltmeters readiDg to determine the approprlllte-range

Each wattmetermiddot has three currentmiddot ratings (2 4 and SA) Rotating the range swiJchfrom middotO~engages the Samprarigefbst ~ the wattm~termiddotreadsbelow ~r 8Cll18 and the ammeter indicates that the 4 amp rating will not be ~e9 ~ectmiddotthe 4 ainp range-middot If the mttnie~ again reads below balt scaie and the ammeterindicates that the 2 amp rating will no~ bemiddot exceeded the 2 amp range may bese1ectedI

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L FIGURE 2 WATTMETER CONNECTIONS 3fi1

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L middot The totalwatbge is the sum of the two meter readings PI and P2

f When pow~ in a ~ced load is m~ured in this ~er the indication or the 1

two ~eterS VlLL~PT be the same except at 1D1ity power factor middot -shy

When the power factor of the circuit is less than 509b the pointer of meter PI will reverse~ To obtain total wattage in this case reverse the current connections to metet Pl -then subtract the rea~g ormeter PI from that of meter P2

The twO-wattmeter~method cannot be used with as-phase 4-wire load Three wattmeters are ~ in that case

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POWER FACTOR i f ~

Given a balallCed load the~oWer tacentor middoteanbe -d~emiined from the two wattmeter mth6cL - ~

L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

J be calca1ated -from-the -following_equation0

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tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

wherep2 repr~ts th~~ier~thetwoWl1ttiJ1~ re~ingswhentbepower faeto~l~other thaD uPity

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BiDet th~powertaetb~ 8q1alsthcosme ofthephaseangletP~powerfactor may also be I deterJninedfromtheratioo~thetwo wittmeterreadings middotmiddotThegraph b~ow shows the1 I

I relationship between themiddotpowerfacior andth~ratio~f P1lP2 ~

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MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

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DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

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agt If the currePtis~ter than 5 amperes the needlewDI move off-scale TuRN OFF POVER IMliEDIATELY AJf exception to this may be on motor starling Momenshytary current inrushbullmay exceed 5 ampe~ but theneedleiminediately drops back to normal

b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

L

1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

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a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

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ENGINEERINGo 90RPORATION -----MANUFAeTURtRS OF poundQUIPMpoundNT lOR EDUCATION ANO INDUSTfty

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MODEL-1723 rACHoME~R

DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

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MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

L bull Fieci120VAC 15A~u~tWod~plex receptacles bull ~12OVAC single-pJiase2-~lOA bull FiX~208120VAC~phase 4-wire15A bull VariabJe 0 ~ 24oI14QVAC8-~i~~9A

f bull -Vari8bleO ~ 150vnQ-i~(lA isolated l~RMS L bull Variable 0 ~ 125VDCt 5Q -isolated ItlmiddotRMS middot

OPEBATIONTouSe the powermiddotpanelt (lISt tum ON ~MAIN AC circuit breaker~i This will m~tethemain AC pnot Hght and 9nergize the four-pin ~Pyen~i supplying fix~208120VAOtliree-phase poWer Th~ other 1ixed~d~Je sulpHes may

l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

cuit ~~ (both ~ ~ncl BEc) A clockwise lOtation of the vol~cpntro1 -- ~ ~eause ~~~~the voltage a~ble at the appropriate 1~Ptashy

L I tNOTE ~~ ~~ltage oo~~lbob fOr the 0-208120V three-phase sUpply is ~ted at the ~nd or the

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IfanY~r~es11PplifSri-e~vefloaded one or more circuit breakers may trip middotOFF Al- ir ways turnthemiddotVariable suppllesto zero and remove the C8usaopound the oyerload before resetshy

JL ting the circuitmiddotl~~em

A pindiilg ~ groun4 oenn~oDis proVided at each end or the panel fOrgrounding the rotating macbin~

ENGINEERING CORPORATION -----MANUFACTURERS OF eciuaPMENT R)R EOUCAT1ON AND INDUSTRV bull

PO Box 563 East ~ow IdA 91028 (413) S25-S9ff1 bull nx 95-5426 bull Fax (41~) S2S-4141

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Page 22: [1 Table D. - UTKweb.eecs.utk.edu/~jsl/ECE325/ECE325-LabManual.pdfLab #2 Load-Speed Characteristic of a DC Motor . Objective . The objective of . this . lab is to . detennine the load-speed

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WRM-10o-3A

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A 6 C AC INPUT SI1PPLY

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S12 520

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WRSe-100

FIGURE 1

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GENERAL

SPECIFICATIONS

middotMODEL SMmiddot100middot3ASYNCHRONOUS MACHINE

ThemiddotSMmiddotI00-8A is a three-phase four-pole machine consisting of a wyedel~ stashytor andmiddot 8 quadrature rotor having a DC field winding and a damper winding A three-pole circUit breaker and a IND START-BYNC RUN switch are provided in the terminal OOx- RatingS fonow

SM-100-3A MOTOR ampALTERNATOR

Speed - 1800 RPM Voltagemiddot Max Ambient Temp Insulation bull Rating bull

CIRCUIT BREAKER

Type of~tor shyNo ofPoles bull Overload Type bull Trip Rating bull Reset Methoa shy

ALTERNATOR

Power-Load Current bull Fielti Excitation shy

MOTOR

HorSepowershyCurrent bull Frequencyshy

208120V-B+-4W 4~ (1047) ClassmiddotB Continuous

Rocker Three Thermal L7amps

middot middotOFF to Reset

250 watts 07 amp (nominal) Separate L6 amps

18 HP 17 Amps 60Hz

ENGINEERING COAPORATION --~-MANUf~RpoundRS~ EQUIPMENT lOR EDUCATION ANO INDUSTRY

Po Box 563 East Lon~~dow~ O~028 (413) 525-3981 bull 1tX95-S426 bull Pax (413) 525-4741

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OPERATION Th~ proper connections tor operation of th~ SMl00-SA ~ a ~clttonous (SYNCHRONOUS motor are shown in Figure middot1 With ~ ~tebin the SYNC RUNposiliou MOTOR) ~ze the vari~ble DC supply and adjusttbe~tput voltage from zero up to

th~ value which eauses 1 amp to flow through the rotor ~turn the switch to the lNDSTART PO$ition middotand Start the motor by toggling~becircuit breaker to

the ONposltion WJten the motor reaches DO lQad 1ij)eeC1 move the switch to the SYNC RUN posItion The rotor will then sYnchronize with the nn~ and fJ1e motor wiD be ti1mrlng at exactly 1800 RPvL Used to demonstrate the Wrious ~tics of synclirOnous motors

+VARIABlpound DC

_sUPPLY

STATOR ROTOR middotL1middot 11 A~~-eJ-----CJ

middot AC u l 12

~~YB~T middotJ3~T3

ct-O--ltr

VARIABLE + DC SUPPLY

FIGURE 1 SM-10o-3A AS A SYNCHRONOUS MoioR

ABC AC SUPPLY INPUT

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OPERATION The proper ampinn~~ fo~ operation or the SM-l00-SA as an alternator are ALTERNATOR) shown in Fi8Ure ~ With tliese connections made and the switch in the SYNCL RUNposition drive the alternator at 1800 RPM With a sUitable prime mover

Energize the DC Voltage supply and increase thesupplys output to bicrease f themiddotslternatorts output voltage to the desired value Toggle the circuit breaker ~L ~ tlie ON pPSition to connect the alternators output to the load Used to

middotdemonstrate the characteristics of a polyphase alternator of the stationary arshyr mature typebull ~t may also be used asthe loading device when testing the varishyI oUsmotom- shy

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_SUPPLY

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ROTOR SlATORL 1

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OUTPUT

rmiddot~ FIGURE 2 L SM-10o-3A AS AN ALTERNATOR

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[ MANUF~OF EOUIPMENT fOR E0UCA1lOH AND INOUS1RY

Po ~ 563 East Longmeadow MA 01028 (419) SSS981 bull nx 95-5426 bull Pax (413) 525-4741

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SERJES100 OPERATING INStRUCTIONS

oMOoDEL DMmiddot1 DDA DC MACHINE

GENERAL The DY-10OA is amiddot two-pole compound-wound machine ~g of a shunt field a series field and an armature winding A shunt fie1dmiddotr~t and two-pole startel switM are also provided in the-terminal box ~tings follow

SPECIFICAnONS

MACHINE

Shunt Field Ex SepO5A 125V Insulation CJass F middotMax Ambient Temp 40 ~C (104 OF) Rating Continl101iS Speed 1800 RPM nominal Shunt Series Compound wo~dJl1Otcr

125V SOAt 18 HP Shunt Series Compound wound generator

RHEOSTAT

Resistance Power Current middot Taper Fuse Minimum Resistance Position

STARTER

Type of Operator No of Poles Overload Type Trip Rating middot Reset Method

125V 2A 250KW

800~Ohms

100 Watts O575middotAmps Lin ear 1A SJo Blo

Toggle Two Thermal 4lAmps Push Toggle down

ENGI-NEERING CORPORATION ----MANUFACTURERS OF eoulPUEHT FOR EDUCATION ANOINOUSTRY

r Po Box ~3J East Longmeadow MA 01028 (413) 525-381 bull nx 9S-S~26 Pax (413) 525-4741

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L FUNCTION The primDrJ function or the DC motor is to demonstrate the characteristics of

shunt series ancl compOund motors~ It IIl8Y also bemiddotutiHzed as a prime mover when testiJlg a gel1eraloror alternator Using the DCmiddotmotor tor this PurPose has the advantage th~tbe speed may be held constant bymiddot8djusting tJie shunt field rheostat after each load step is applied

L OPERATION The -proper connections for operation as a ClUDulative compound DC motor are

(DC MOTOR) shOWDin Fipre i Withmiddot theseoonndionS made the motor may be started by moving the starter switch toggle up to the ON position It is good praetioe to stad the motor with the shunt field rh~ in its minimum resistance fully COW position to provide m8amum starting torque andmiDitnum starting Curshy

L rent The motor may then be adjusted ~ the desired speed byadjUBtingtbe field rheostat or varying the line voltage

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1 125VDO SUPPLY

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+ 125V DC SUPPLY

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FUNCTION The DC generator is p~arily utili2ed to demonstrate the characteristics of shunt series ~dCOinpound gen~tors It is~ alsOusedastlle loading device

when testing the vari~us motors

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OPERATION The~CODnections tor operation as a cmnulative C()~po1l1ld nCgenshyeratorareshown in Figure 2 With these connectio~middotmiddotDltldeJ drive theJDCmiddotGENERATOR gen~-atapproxhnately1800RPM with a suitable p~e moVer With thefie1qrheostatJnits Jll8Ximum resistance fullyc1ocm~ position enshyergiZe thel15V DC field supply Rotate the field rheostatinthecltunter

shy clockwisedir$ctian middottoinCreasemiddot the output voltage middotto the desiredmiddot value Switch Oti~middotthemiddotoverloadmiddot switChmiddotto connect the generators output to the

resistance load

+ 1151 DC - 230 W

OUTPUT

RHEO SERIES L1

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FIGURE 2DC G~NERATOR)

ENGINEERING CORPORATION MANUFACTURERS Oyen eoutPUampNT FOR EDUCATION AND IHOUSTRY

Po Box S63 East Longmeadow -MA 01028 (413) S2S-3981 bull TLX 95-5426 bull p~ (413) 525-4741

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MODEL MGmiddotBmiddot100DG BEDPLATE f

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The MG Bedplateconsists of a heayy s~ baBe n10~~middotmiddoton vibration pads The

I - GENERAL

function otthe bedplate is toe~le the quickmounting ~dcoup1mg of the two individ~ macbiDoes to form a completemiddotmiddotm~ior-Pnerator setpwothreaded hpldshy

~ down)1Ocks ~d winged screwsareprovidecltoseeurethe F t claJnps which hold tbeinBcbinetsmounting boards A couplingguard and two shaft ~gwrrds are p~

r vided to p~ttheSiudenttrom accidet1talJito~gor~~gwires0l1 rotatshy- shy ing)arts The guardsmiddotare quickly mounted bY insertirig retamer CUpS in~T~9tsin

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The procedure for mou~ting and ioupling the machines to the base is as fon~

L 1 A~just each wing screw 021- ~e two screw clamp hold~ownmiddot ~locks to the top of its threaded stud - 0

i 2 Place each ~chine so that the rear of the base is reSting agairistmiddotthemiddot thd rear clamp on thei L- MGbasemiddot

8 Slide machines iJiboara until ~elrcouplingl1anPs are centered oVer cen~ slots 4 bert rub coupnngmiddotsleevemiddot~toone of the mac1dnes co~pling 1IimgM~ L

5 Slidere~jning machines coupling flange into-the other side of couplbig sleeve 6 Checktobe Sure thatmiddot~e couplhig guard will cOver coupling when insertedmiddotinto one ot thel pails areenter slotsmiddot 7 plaCe front clamp tor each of machines against the front or the two macbiD5t bases

(- s 8 F~pr tighten ~~uts 9it middotthe two screw clamp hold-down biocks Lmiddot 9 Mount coUplini aDd shaft guards by locating appropriate retainer clips in slotS so that coushy

pling is ~der co~Ung guard and ~ sh~ is covered by a ~haft guatdL

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MODIL1-10oaA TRANSFClRfJIER OEMONSTRATOR

GENEijAL The TlOO-8A~~ts of three Single-phase bansformers wit~ m11Jtiple primary and secondary taps terminated atpinreceptacl~on the front of the unit Each of the three ~rOrinersmay beused independen1q Or the threemay~interconmiddot

f nected mseries~1npQmneJ or inmiddot many poJyph8seCbnfigurations

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EacbtraDslormer is~~middot af)vol~amperesat 60 Hertz ~ has two primary~d

two secoDdaqwindiIlBL Each ofthe priD1817 windiD~1tas800 turns of Nobull 24 gauge-wire and JSmiddotm~-120volta 05 amperes Onewhidingis tapped at 82 volts toprovide~~middotS~tttllp~(866$)middot~fthemiddot twomiddotwiDd1np~ 68ri~ Each or thesecondshylQ7middotwindh1pmiddot1uIs100t11rns of No 21 gauge wire and israted 60 volts 10 ampere One winding Js tappbd atmiddotlaquo volts to p~vide a Scott tapor the two windings in series Shownbelow are the voltage ratings orthe various taps for each of the three traDspoundormers

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t bull MODEL middotRLmiddot100AmiddotRESISTANC~LOAD J J- shy~ GENERAL The RL-IOOAfs variable ftsistance unit used to applya resistivel0a4middottogenera

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tors or altemators One unit may be used in single-phase applications ora bank L of tlmae units may be combhled intQ Wye or De1taCOnt1IJDlt1~DS tor three phase

applicmioDS TiieRL-lOOA mttoduces resistieload~ ~sequentild steps r designed to prod11CB approximateiy equal ipcremeJlts otJoadmiddot~tmiddot The SPST f ~ toigle switches are numbered andmiddot must be cloSed in nUD1erl~ordertodecrease

totlreslstance~creasmglOad The total ~cemiddot or the cOb~ected~rs ( may be COmputed f~theequation L

middot 1 1 1-1 ~=R1+Ri+lt8middotmiddotmiddot

The ConowingO equations may be used to detemUne the power disSipated from a measurement of load currentor voltage

L P=EI = = I~

p (ampp) = 8 xEpBPH (tor balanced ioad)

Where P=P~inWatb

E =yoltage inVolfB I = Currentin Amperes

f R =Resistance in Ohms L P(Stp) =middotmiddotTotalPower for Three-Phase

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MODEL RLC-100RESmiddotISTANCE-REACTANmiddotCE LOAD

The RLCl00 ismiddota variable resistance and--reactance- (either ~ductive or capaci- tive) uDit that ~y be used _to apply a singl~plmse or a three-phase load The remstive load (w~ can be ~ for both middotACcd DC) is controDed by siz SPST toggle switches e8ch of which puts 2000 ohlnaof resistance in paraDelmiddot lor all three phases simultaneouslybullThe resistive-load is therefore always balanced The total resistance in eacli ph8se equals 2000- ohms divided by the Dumber of switches closed For example with two sWitehesclosedtbe total resistance-is 1000 ohms rith aUsiZ closed 8888 ohms Each or the three reactance loads (used forAC o~) separateVfused at 1 amp is controlled by a knob that varltlSthe degreeopound lead andmiddot l8g A clockwise rotationof the middotknob applies leadiIlg pOwer factor (cashypaCitive)loid while a counterc1~ rotation appIiesa lagging power factor (inductive) load There is DO lpadapplied whenthe-knob is in mid position

The 8-4-5 right triangle graph below may bemiddot~ to approximate a O~8 power factor leading or lagging

1 Appfi a resistiVe load 2 Readthe in-phase current h from -the ammeter 8 From the lR value on tlie horizontal base of the graph travel vertically to the

point where it intersects the 08 PF (total amps) line 4 Frommiddotthis point travel horizontally to the reactive current wlueIz 5 Adjust the ~ve load until the Ix ammeter reads this value of reactive cur

rent

6 To obtain a ~ced load in a three-phaseconfigaratioD repeat Step -5 for the other two~

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middotINDUCTANCEDIAL POSITIONmiddot (~middotQLJNT~RCmiddotLOCKWJSE)

-12 51 Henry

middot11 ~ 57 Henry

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DIAL POSITION CAPACITANCE (CLOCKWISE)

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1 1~57 J1F

2 316 J1F

3 501Jlf

middot4 640J1F

5 80~J1f

6 985 j1f 7 1160middotpF

8 1360J1Fmiddot

9 1609middotJ1F

10 18~JtF

11 2007~middotF

12 2170 fLF

13 2513 )iFmiddot

14 2860J1F

15 3090 pFmiddot

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SERIES 100OPERATING INSTAUCTIONS L

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MODJL ACVA-10()ACMETERINGPANEL L GENERAL The HAMPDEN Model ACVA-1OO consistsmiddotol two AC ammetem and one AC voltshy

meterA11 or the meters are dioaeprot8cted against overloads as high 1Ui 1000f

The ~ltmeter islicctt8 within 8 w1UIemiddotthe ammeters are accurate wi~hin ~ plusmn29D ormiddotfWl sCale dellection The middotme~rshave the following ranges

r I AC Voltm~teI Oto l00~OO V~ts ~ AC Amme~ OtlJQ5f2f4l8-Amps

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OPERATION

AC AMMETERS

L 1 Connect the ammeter in series so that the middotentire AC current to be measured passes

I through the ~~ter The test lead from the dark blue middotbindingpostis connected to one

side or the Dne and the test lead trom the Qrange bin~ post to the other ~ L

2 ~e choice or measuring range is iet with the range switch Fourmiddotranges are avaiiable O 05 0204 an~ 0 - 8 amperes

8 Set the rangemiddotswitch on the 8 ampere range Detore turning on the power

a) When ~ to measure motor current put a jumper lead between the tWo binding poststo protect the movement from the large inrushcurrent at start This jumper is

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removed after the motor has started

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MODELACWM-1 GO WATIMETER PANEL

GENERAL The1iAMPDEN Model ACWMmiddotI00 consists artwo Iilulti-rangewattmeters and

I tbe~tchesh-lh~r operation Eacli has ~e follOwing ranges l

)to 1~30016~1200W

(150300Volts 2148 Amps)

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OPERATION Measure wattage bymiddotconn8cling a wattmetervoltmeter andmiddot~ete~8sshownin Figtt81 The ~-MPstttOn mustO be~middotconn~middotin series- with the ioad and-the

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VQTS con mUstmiddotbeqo~n~middotiJ1 prU9l1elwith the load protected against overloads by diodes

The Otlrrent~Coils are

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-FIGURE 1 WATTMETER CONNECnONS 14IJ -- -

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Each wa~eter has tWomiddot Voltage mtinp (150 and- 800V)~ Rotating the range -switclirounterciOCkwise from OFF engages the 150 volt range Rotatmg the _range SWitch clOQkwise from O~ engages the 800 volt range Utilize the Voltmeters readiDg to determine the approprlllte-range

Each wattmetermiddot has three currentmiddot ratings (2 4 and SA) Rotating the range swiJchfrom middotO~engages the Samprarigefbst ~ the wattm~termiddotreadsbelow ~r 8Cll18 and the ammeter indicates that the 4 amp rating will not be ~e9 ~ectmiddotthe 4 ainp range-middot If the mttnie~ again reads below balt scaie and the ammeterindicates that the 2 amp rating will no~ bemiddot exceeded the 2 amp range may bese1ectedI

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L FIGURE 2 WATTMETER CONNECTIONS 3fi1

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L middot The totalwatbge is the sum of the two meter readings PI and P2

f When pow~ in a ~ced load is m~ured in this ~er the indication or the 1

two ~eterS VlLL~PT be the same except at 1D1ity power factor middot -shy

When the power factor of the circuit is less than 509b the pointer of meter PI will reverse~ To obtain total wattage in this case reverse the current connections to metet Pl -then subtract the rea~g ormeter PI from that of meter P2

The twO-wattmeter~method cannot be used with as-phase 4-wire load Three wattmeters are ~ in that case

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POWER FACTOR i f ~

Given a balallCed load the~oWer tacentor middoteanbe -d~emiined from the two wattmeter mth6cL - ~

L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

J be calca1ated -from-the -following_equation0

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tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

wherep2 repr~ts th~~ier~thetwoWl1ttiJ1~ re~ingswhentbepower faeto~l~other thaD uPity

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BiDet th~powertaetb~ 8q1alsthcosme ofthephaseangletP~powerfactor may also be I deterJninedfromtheratioo~thetwo wittmeterreadings middotmiddotThegraph b~ow shows the1 I

I relationship between themiddotpowerfacior andth~ratio~f P1lP2 ~

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MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

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DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

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agt If the currePtis~ter than 5 amperes the needlewDI move off-scale TuRN OFF POVER IMliEDIATELY AJf exception to this may be on motor starling Momenshytary current inrushbullmay exceed 5 ampe~ but theneedleiminediately drops back to normal

b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

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1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

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a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

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MODEL-1723 rACHoME~R

DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

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MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

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OPEBATIONTouSe the powermiddotpanelt (lISt tum ON ~MAIN AC circuit breaker~i This will m~tethemain AC pnot Hght and 9nergize the four-pin ~Pyen~i supplying fix~208120VAOtliree-phase poWer Th~ other 1ixed~d~Je sulpHes may

l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

cuit ~~ (both ~ ~ncl BEc) A clockwise lOtation of the vol~cpntro1 -- ~ ~eause ~~~~the voltage a~ble at the appropriate 1~Ptashy

L I tNOTE ~~ ~~ltage oo~~lbob fOr the 0-208120V three-phase sUpply is ~ted at the ~nd or the

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IfanY~r~es11PplifSri-e~vefloaded one or more circuit breakers may trip middotOFF Al- ir ways turnthemiddotVariable suppllesto zero and remove the C8usaopound the oyerload before resetshy

JL ting the circuitmiddotl~~em

A pindiilg ~ groun4 oenn~oDis proVided at each end or the panel fOrgrounding the rotating macbin~

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GENERAL

SPECIFICATIONS

middotMODEL SMmiddot100middot3ASYNCHRONOUS MACHINE

ThemiddotSMmiddotI00-8A is a three-phase four-pole machine consisting of a wyedel~ stashytor andmiddot 8 quadrature rotor having a DC field winding and a damper winding A three-pole circUit breaker and a IND START-BYNC RUN switch are provided in the terminal OOx- RatingS fonow

SM-100-3A MOTOR ampALTERNATOR

Speed - 1800 RPM Voltagemiddot Max Ambient Temp Insulation bull Rating bull

CIRCUIT BREAKER

Type of~tor shyNo ofPoles bull Overload Type bull Trip Rating bull Reset Methoa shy

ALTERNATOR

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MOTOR

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208120V-B+-4W 4~ (1047) ClassmiddotB Continuous

Rocker Three Thermal L7amps

middot middotOFF to Reset

250 watts 07 amp (nominal) Separate L6 amps

18 HP 17 Amps 60Hz

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OPERATION Th~ proper connections tor operation of th~ SMl00-SA ~ a ~clttonous (SYNCHRONOUS motor are shown in Figure middot1 With ~ ~tebin the SYNC RUNposiliou MOTOR) ~ze the vari~ble DC supply and adjusttbe~tput voltage from zero up to

th~ value which eauses 1 amp to flow through the rotor ~turn the switch to the lNDSTART PO$ition middotand Start the motor by toggling~becircuit breaker to

the ONposltion WJten the motor reaches DO lQad 1ij)eeC1 move the switch to the SYNC RUN posItion The rotor will then sYnchronize with the nn~ and fJ1e motor wiD be ti1mrlng at exactly 1800 RPvL Used to demonstrate the Wrious ~tics of synclirOnous motors

+VARIABlpound DC

_sUPPLY

STATOR ROTOR middotL1middot 11 A~~-eJ-----CJ

middot AC u l 12

~~YB~T middotJ3~T3

ct-O--ltr

VARIABLE + DC SUPPLY

FIGURE 1 SM-10o-3A AS A SYNCHRONOUS MoioR

ABC AC SUPPLY INPUT

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OPERATION The proper ampinn~~ fo~ operation or the SM-l00-SA as an alternator are ALTERNATOR) shown in Fi8Ure ~ With tliese connections made and the switch in the SYNCL RUNposition drive the alternator at 1800 RPM With a sUitable prime mover

Energize the DC Voltage supply and increase thesupplys output to bicrease f themiddotslternatorts output voltage to the desired value Toggle the circuit breaker ~L ~ tlie ON pPSition to connect the alternators output to the load Used to

middotdemonstrate the characteristics of a polyphase alternator of the stationary arshyr mature typebull ~t may also be used asthe loading device when testing the varishyI oUsmotom- shy

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SERJES100 OPERATING INStRUCTIONS

oMOoDEL DMmiddot1 DDA DC MACHINE

GENERAL The DY-10OA is amiddot two-pole compound-wound machine ~g of a shunt field a series field and an armature winding A shunt fie1dmiddotr~t and two-pole startel switM are also provided in the-terminal box ~tings follow

SPECIFICAnONS

MACHINE

Shunt Field Ex SepO5A 125V Insulation CJass F middotMax Ambient Temp 40 ~C (104 OF) Rating Continl101iS Speed 1800 RPM nominal Shunt Series Compound wo~dJl1Otcr

125V SOAt 18 HP Shunt Series Compound wound generator

RHEOSTAT

Resistance Power Current middot Taper Fuse Minimum Resistance Position

STARTER

Type of Operator No of Poles Overload Type Trip Rating middot Reset Method

125V 2A 250KW

800~Ohms

100 Watts O575middotAmps Lin ear 1A SJo Blo

Toggle Two Thermal 4lAmps Push Toggle down

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L FUNCTION The primDrJ function or the DC motor is to demonstrate the characteristics of

shunt series ancl compOund motors~ It IIl8Y also bemiddotutiHzed as a prime mover when testiJlg a gel1eraloror alternator Using the DCmiddotmotor tor this PurPose has the advantage th~tbe speed may be held constant bymiddot8djusting tJie shunt field rheostat after each load step is applied

L OPERATION The -proper connections for operation as a ClUDulative compound DC motor are

(DC MOTOR) shOWDin Fipre i Withmiddot theseoonndionS made the motor may be started by moving the starter switch toggle up to the ON position It is good praetioe to stad the motor with the shunt field rh~ in its minimum resistance fully COW position to provide m8amum starting torque andmiDitnum starting Curshy

L rent The motor may then be adjusted ~ the desired speed byadjUBtingtbe field rheostat or varying the line voltage

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1 125VDO SUPPLY

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FUNCTION The DC generator is p~arily utili2ed to demonstrate the characteristics of shunt series ~dCOinpound gen~tors It is~ alsOusedastlle loading device

when testing the vari~us motors

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OPERATION The~CODnections tor operation as a cmnulative C()~po1l1ld nCgenshyeratorareshown in Figure 2 With these connectio~middotmiddotDltldeJ drive theJDCmiddotGENERATOR gen~-atapproxhnately1800RPM with a suitable p~e moVer With thefie1qrheostatJnits Jll8Ximum resistance fullyc1ocm~ position enshyergiZe thel15V DC field supply Rotate the field rheostatinthecltunter

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resistance load

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OUTPUT

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I - GENERAL

function otthe bedplate is toe~le the quickmounting ~dcoup1mg of the two individ~ macbiDoes to form a completemiddotmiddotm~ior-Pnerator setpwothreaded hpldshy

~ down)1Ocks ~d winged screwsareprovidecltoseeurethe F t claJnps which hold tbeinBcbinetsmounting boards A couplingguard and two shaft ~gwrrds are p~

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The procedure for mou~ting and ioupling the machines to the base is as fon~

L 1 A~just each wing screw 021- ~e two screw clamp hold~ownmiddot ~locks to the top of its threaded stud - 0

i 2 Place each ~chine so that the rear of the base is reSting agairistmiddotthemiddot thd rear clamp on thei L- MGbasemiddot

8 Slide machines iJiboara until ~elrcouplingl1anPs are centered oVer cen~ slots 4 bert rub coupnngmiddotsleevemiddot~toone of the mac1dnes co~pling 1IimgM~ L

5 Slidere~jning machines coupling flange into-the other side of couplbig sleeve 6 Checktobe Sure thatmiddot~e couplhig guard will cOver coupling when insertedmiddotinto one ot thel pails areenter slotsmiddot 7 plaCe front clamp tor each of machines against the front or the two macbiD5t bases

(- s 8 F~pr tighten ~~uts 9it middotthe two screw clamp hold-down biocks Lmiddot 9 Mount coUplini aDd shaft guards by locating appropriate retainer clips in slotS so that coushy

pling is ~der co~Ung guard and ~ sh~ is covered by a ~haft guatdL

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MODIL1-10oaA TRANSFClRfJIER OEMONSTRATOR

GENEijAL The TlOO-8A~~ts of three Single-phase bansformers wit~ m11Jtiple primary and secondary taps terminated atpinreceptacl~on the front of the unit Each of the three ~rOrinersmay beused independen1q Or the threemay~interconmiddot

f nected mseries~1npQmneJ or inmiddot many poJyph8seCbnfigurations

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EacbtraDslormer is~~middot af)vol~amperesat 60 Hertz ~ has two primary~d

two secoDdaqwindiIlBL Each ofthe priD1817 windiD~1tas800 turns of Nobull 24 gauge-wire and JSmiddotm~-120volta 05 amperes Onewhidingis tapped at 82 volts toprovide~~middotS~tttllp~(866$)middot~fthemiddot twomiddotwiDd1np~ 68ri~ Each or thesecondshylQ7middotwindh1pmiddot1uIs100t11rns of No 21 gauge wire and israted 60 volts 10 ampere One winding Js tappbd atmiddotlaquo volts to p~vide a Scott tapor the two windings in series Shownbelow are the voltage ratings orthe various taps for each of the three traDspoundormers

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t bull MODEL middotRLmiddot100AmiddotRESISTANC~LOAD J J- shy~ GENERAL The RL-IOOAfs variable ftsistance unit used to applya resistivel0a4middottogenera

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tors or altemators One unit may be used in single-phase applications ora bank L of tlmae units may be combhled intQ Wye or De1taCOnt1IJDlt1~DS tor three phase

applicmioDS TiieRL-lOOA mttoduces resistieload~ ~sequentild steps r designed to prod11CB approximateiy equal ipcremeJlts otJoadmiddot~tmiddot The SPST f ~ toigle switches are numbered andmiddot must be cloSed in nUD1erl~ordertodecrease

totlreslstance~creasmglOad The total ~cemiddot or the cOb~ected~rs ( may be COmputed f~theequation L

middot 1 1 1-1 ~=R1+Ri+lt8middotmiddotmiddot

The ConowingO equations may be used to detemUne the power disSipated from a measurement of load currentor voltage

L P=EI = = I~

p (ampp) = 8 xEpBPH (tor balanced ioad)

Where P=P~inWatb

E =yoltage inVolfB I = Currentin Amperes

f R =Resistance in Ohms L P(Stp) =middotmiddotTotalPower for Three-Phase

~H ==~ Voltage per Phase~r Load Bankf L bull IpH = Ourrent per Phase ofLoad Bank ampshy

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~ SERIES 100 OPmiddotERATmiddotING INSTRUCTIONS

MODEL RLC-100RESmiddotISTANCE-REACTANmiddotCE LOAD

The RLCl00 ismiddota variable resistance and--reactance- (either ~ductive or capaci- tive) uDit that ~y be used _to apply a singl~plmse or a three-phase load The remstive load (w~ can be ~ for both middotACcd DC) is controDed by siz SPST toggle switches e8ch of which puts 2000 ohlnaof resistance in paraDelmiddot lor all three phases simultaneouslybullThe resistive-load is therefore always balanced The total resistance in eacli ph8se equals 2000- ohms divided by the Dumber of switches closed For example with two sWitehesclosedtbe total resistance-is 1000 ohms rith aUsiZ closed 8888 ohms Each or the three reactance loads (used forAC o~) separateVfused at 1 amp is controlled by a knob that varltlSthe degreeopound lead andmiddot l8g A clockwise rotationof the middotknob applies leadiIlg pOwer factor (cashypaCitive)loid while a counterc1~ rotation appIiesa lagging power factor (inductive) load There is DO lpadapplied whenthe-knob is in mid position

The 8-4-5 right triangle graph below may bemiddot~ to approximate a O~8 power factor leading or lagging

1 Appfi a resistiVe load 2 Readthe in-phase current h from -the ammeter 8 From the lR value on tlie horizontal base of the graph travel vertically to the

point where it intersects the 08 PF (total amps) line 4 Frommiddotthis point travel horizontally to the reactive current wlueIz 5 Adjust the ~ve load until the Ix ammeter reads this value of reactive cur

rent

6 To obtain a ~ced load in a three-phaseconfigaratioD repeat Step -5 for the other two~

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middotINDUCTANCEDIAL POSITIONmiddot (~middotQLJNT~RCmiddotLOCKWJSE)

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DIAL POSITION CAPACITANCE (CLOCKWISE)

0 69 llF

1 1~57 J1F

2 316 J1F

3 501Jlf

middot4 640J1F

5 80~J1f

6 985 j1f 7 1160middotpF

8 1360J1Fmiddot

9 1609middotJ1F

10 18~JtF

11 2007~middotF

12 2170 fLF

13 2513 )iFmiddot

14 2860J1F

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SERIES 100OPERATING INSTAUCTIONS L

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MODJL ACVA-10()ACMETERINGPANEL L GENERAL The HAMPDEN Model ACVA-1OO consistsmiddotol two AC ammetem and one AC voltshy

meterA11 or the meters are dioaeprot8cted against overloads as high 1Ui 1000f

The ~ltmeter islicctt8 within 8 w1UIemiddotthe ammeters are accurate wi~hin ~ plusmn29D ormiddotfWl sCale dellection The middotme~rshave the following ranges

r I AC Voltm~teI Oto l00~OO V~ts ~ AC Amme~ OtlJQ5f2f4l8-Amps

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OPERATION

AC AMMETERS

L 1 Connect the ammeter in series so that the middotentire AC current to be measured passes

I through the ~~ter The test lead from the dark blue middotbindingpostis connected to one

side or the Dne and the test lead trom the Qrange bin~ post to the other ~ L

2 ~e choice or measuring range is iet with the range switch Fourmiddotranges are avaiiable O 05 0204 an~ 0 - 8 amperes

8 Set the rangemiddotswitch on the 8 ampere range Detore turning on the power

a) When ~ to measure motor current put a jumper lead between the tWo binding poststo protect the movement from the large inrushcurrent at start This jumper is

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removed after the motor has started

--~---~--~_--------~---_~_----ENGINEERfNG CORPORATION

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MODELACWM-1 GO WATIMETER PANEL

GENERAL The1iAMPDEN Model ACWMmiddotI00 consists artwo Iilulti-rangewattmeters and

I tbe~tchesh-lh~r operation Eacli has ~e follOwing ranges l

)to 1~30016~1200W

(150300Volts 2148 Amps)

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OPERATION Measure wattage bymiddotconn8cling a wattmetervoltmeter andmiddot~ete~8sshownin Figtt81 The ~-MPstttOn mustO be~middotconn~middotin series- with the ioad and-the

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VQTS con mUstmiddotbeqo~n~middotiJ1 prU9l1elwith the load protected against overloads by diodes

The Otlrrent~Coils are

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-FIGURE 1 WATTMETER CONNECnONS 14IJ -- -

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Balanced Load

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Each wa~eter has tWomiddot Voltage mtinp (150 and- 800V)~ Rotating the range -switclirounterciOCkwise from OFF engages the 150 volt range Rotatmg the _range SWitch clOQkwise from O~ engages the 800 volt range Utilize the Voltmeters readiDg to determine the approprlllte-range

Each wattmetermiddot has three currentmiddot ratings (2 4 and SA) Rotating the range swiJchfrom middotO~engages the Samprarigefbst ~ the wattm~termiddotreadsbelow ~r 8Cll18 and the ammeter indicates that the 4 amp rating will not be ~e9 ~ectmiddotthe 4 ainp range-middot If the mttnie~ again reads below balt scaie and the ammeterindicates that the 2 amp rating will no~ bemiddot exceeded the 2 amp range may bese1ectedI

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L FIGURE 2 WATTMETER CONNECTIONS 3fi1

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L middot The totalwatbge is the sum of the two meter readings PI and P2

f When pow~ in a ~ced load is m~ured in this ~er the indication or the 1

two ~eterS VlLL~PT be the same except at 1D1ity power factor middot -shy

When the power factor of the circuit is less than 509b the pointer of meter PI will reverse~ To obtain total wattage in this case reverse the current connections to metet Pl -then subtract the rea~g ormeter PI from that of meter P2

The twO-wattmeter~method cannot be used with as-phase 4-wire load Three wattmeters are ~ in that case

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POWER FACTOR i f ~

Given a balallCed load the~oWer tacentor middoteanbe -d~emiined from the two wattmeter mth6cL - ~

L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

J be calca1ated -from-the -following_equation0

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tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

wherep2 repr~ts th~~ier~thetwoWl1ttiJ1~ re~ingswhentbepower faeto~l~other thaD uPity

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BiDet th~powertaetb~ 8q1alsthcosme ofthephaseangletP~powerfactor may also be I deterJninedfromtheratioo~thetwo wittmeterreadings middotmiddotThegraph b~ow shows the1 I

I relationship between themiddotpowerfacior andth~ratio~f P1lP2 ~

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MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

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DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

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agt If the currePtis~ter than 5 amperes the needlewDI move off-scale TuRN OFF POVER IMliEDIATELY AJf exception to this may be on motor starling Momenshytary current inrushbullmay exceed 5 ampe~ but theneedleiminediately drops back to normal

b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

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1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

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a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

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MODEL-1723 rACHoME~R

DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

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MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

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OPEBATIONTouSe the powermiddotpanelt (lISt tum ON ~MAIN AC circuit breaker~i This will m~tethemain AC pnot Hght and 9nergize the four-pin ~Pyen~i supplying fix~208120VAOtliree-phase poWer Th~ other 1ixed~d~Je sulpHes may

l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

cuit ~~ (both ~ ~ncl BEc) A clockwise lOtation of the vol~cpntro1 -- ~ ~eause ~~~~the voltage a~ble at the appropriate 1~Ptashy

L I tNOTE ~~ ~~ltage oo~~lbob fOr the 0-208120V three-phase sUpply is ~ted at the ~nd or the

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IfanY~r~es11PplifSri-e~vefloaded one or more circuit breakers may trip middotOFF Al- ir ways turnthemiddotVariable suppllesto zero and remove the C8usaopound the oyerload before resetshy

JL ting the circuitmiddotl~~em

A pindiilg ~ groun4 oenn~oDis proVided at each end or the panel fOrgrounding the rotating macbin~

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PO Box 563 East ~ow IdA 91028 (413) S25-S9ff1 bull nx 95-5426 bull Fax (41~) S2S-4141

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Page 24: [1 Table D. - UTKweb.eecs.utk.edu/~jsl/ECE325/ECE325-LabManual.pdfLab #2 Load-Speed Characteristic of a DC Motor . Objective . The objective of . this . lab is to . detennine the load-speed

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OPERATION Th~ proper connections tor operation of th~ SMl00-SA ~ a ~clttonous (SYNCHRONOUS motor are shown in Figure middot1 With ~ ~tebin the SYNC RUNposiliou MOTOR) ~ze the vari~ble DC supply and adjusttbe~tput voltage from zero up to

th~ value which eauses 1 amp to flow through the rotor ~turn the switch to the lNDSTART PO$ition middotand Start the motor by toggling~becircuit breaker to

the ONposltion WJten the motor reaches DO lQad 1ij)eeC1 move the switch to the SYNC RUN posItion The rotor will then sYnchronize with the nn~ and fJ1e motor wiD be ti1mrlng at exactly 1800 RPvL Used to demonstrate the Wrious ~tics of synclirOnous motors

+VARIABlpound DC

_sUPPLY

STATOR ROTOR middotL1middot 11 A~~-eJ-----CJ

middot AC u l 12

~~YB~T middotJ3~T3

ct-O--ltr

VARIABLE + DC SUPPLY

FIGURE 1 SM-10o-3A AS A SYNCHRONOUS MoioR

ABC AC SUPPLY INPUT

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OPERATION The proper ampinn~~ fo~ operation or the SM-l00-SA as an alternator are ALTERNATOR) shown in Fi8Ure ~ With tliese connections made and the switch in the SYNCL RUNposition drive the alternator at 1800 RPM With a sUitable prime mover

Energize the DC Voltage supply and increase thesupplys output to bicrease f themiddotslternatorts output voltage to the desired value Toggle the circuit breaker ~L ~ tlie ON pPSition to connect the alternators output to the load Used to

middotdemonstrate the characteristics of a polyphase alternator of the stationary arshyr mature typebull ~t may also be used asthe loading device when testing the varishyI oUsmotom- shy

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OUTPUT

rmiddot~ FIGURE 2 L SM-10o-3A AS AN ALTERNATOR

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SERJES100 OPERATING INStRUCTIONS

oMOoDEL DMmiddot1 DDA DC MACHINE

GENERAL The DY-10OA is amiddot two-pole compound-wound machine ~g of a shunt field a series field and an armature winding A shunt fie1dmiddotr~t and two-pole startel switM are also provided in the-terminal box ~tings follow

SPECIFICAnONS

MACHINE

Shunt Field Ex SepO5A 125V Insulation CJass F middotMax Ambient Temp 40 ~C (104 OF) Rating Continl101iS Speed 1800 RPM nominal Shunt Series Compound wo~dJl1Otcr

125V SOAt 18 HP Shunt Series Compound wound generator

RHEOSTAT

Resistance Power Current middot Taper Fuse Minimum Resistance Position

STARTER

Type of Operator No of Poles Overload Type Trip Rating middot Reset Method

125V 2A 250KW

800~Ohms

100 Watts O575middotAmps Lin ear 1A SJo Blo

Toggle Two Thermal 4lAmps Push Toggle down

ENGI-NEERING CORPORATION ----MANUFACTURERS OF eoulPUEHT FOR EDUCATION ANOINOUSTRY

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L FUNCTION The primDrJ function or the DC motor is to demonstrate the characteristics of

shunt series ancl compOund motors~ It IIl8Y also bemiddotutiHzed as a prime mover when testiJlg a gel1eraloror alternator Using the DCmiddotmotor tor this PurPose has the advantage th~tbe speed may be held constant bymiddot8djusting tJie shunt field rheostat after each load step is applied

L OPERATION The -proper connections for operation as a ClUDulative compound DC motor are

(DC MOTOR) shOWDin Fipre i Withmiddot theseoonndionS made the motor may be started by moving the starter switch toggle up to the ON position It is good praetioe to stad the motor with the shunt field rh~ in its minimum resistance fully COW position to provide m8amum starting torque andmiDitnum starting Curshy

L rent The motor may then be adjusted ~ the desired speed byadjUBtingtbe field rheostat or varying the line voltage

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1 125VDO SUPPLY

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FUNCTION The DC generator is p~arily utili2ed to demonstrate the characteristics of shunt series ~dCOinpound gen~tors It is~ alsOusedastlle loading device

when testing the vari~us motors

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OPERATION The~CODnections tor operation as a cmnulative C()~po1l1ld nCgenshyeratorareshown in Figure 2 With these connectio~middotmiddotDltldeJ drive theJDCmiddotGENERATOR gen~-atapproxhnately1800RPM with a suitable p~e moVer With thefie1qrheostatJnits Jll8Ximum resistance fullyc1ocm~ position enshyergiZe thel15V DC field supply Rotate the field rheostatinthecltunter

shy clockwisedir$ctian middottoinCreasemiddot the output voltage middotto the desiredmiddot value Switch Oti~middotthemiddotoverloadmiddot switChmiddotto connect the generators output to the

resistance load

+ 1151 DC - 230 W

OUTPUT

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Po Box S63 East Longmeadow -MA 01028 (413) S2S-3981 bull TLX 95-5426 bull p~ (413) 525-4741

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MODEL MGmiddotBmiddot100DG BEDPLATE f

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The MG Bedplateconsists of a heayy s~ baBe n10~~middotmiddoton vibration pads The

I - GENERAL

function otthe bedplate is toe~le the quickmounting ~dcoup1mg of the two individ~ macbiDoes to form a completemiddotmiddotm~ior-Pnerator setpwothreaded hpldshy

~ down)1Ocks ~d winged screwsareprovidecltoseeurethe F t claJnps which hold tbeinBcbinetsmounting boards A couplingguard and two shaft ~gwrrds are p~

r vided to p~ttheSiudenttrom accidet1talJito~gor~~gwires0l1 rotatshy- shy ing)arts The guardsmiddotare quickly mounted bY insertirig retamer CUpS in~T~9tsin

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The procedure for mou~ting and ioupling the machines to the base is as fon~

L 1 A~just each wing screw 021- ~e two screw clamp hold~ownmiddot ~locks to the top of its threaded stud - 0

i 2 Place each ~chine so that the rear of the base is reSting agairistmiddotthemiddot thd rear clamp on thei L- MGbasemiddot

8 Slide machines iJiboara until ~elrcouplingl1anPs are centered oVer cen~ slots 4 bert rub coupnngmiddotsleevemiddot~toone of the mac1dnes co~pling 1IimgM~ L

5 Slidere~jning machines coupling flange into-the other side of couplbig sleeve 6 Checktobe Sure thatmiddot~e couplhig guard will cOver coupling when insertedmiddotinto one ot thel pails areenter slotsmiddot 7 plaCe front clamp tor each of machines against the front or the two macbiD5t bases

(- s 8 F~pr tighten ~~uts 9it middotthe two screw clamp hold-down biocks Lmiddot 9 Mount coUplini aDd shaft guards by locating appropriate retainer clips in slotS so that coushy

pling is ~der co~Ung guard and ~ sh~ is covered by a ~haft guatdL

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MODIL1-10oaA TRANSFClRfJIER OEMONSTRATOR

GENEijAL The TlOO-8A~~ts of three Single-phase bansformers wit~ m11Jtiple primary and secondary taps terminated atpinreceptacl~on the front of the unit Each of the three ~rOrinersmay beused independen1q Or the threemay~interconmiddot

f nected mseries~1npQmneJ or inmiddot many poJyph8seCbnfigurations

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EacbtraDslormer is~~middot af)vol~amperesat 60 Hertz ~ has two primary~d

two secoDdaqwindiIlBL Each ofthe priD1817 windiD~1tas800 turns of Nobull 24 gauge-wire and JSmiddotm~-120volta 05 amperes Onewhidingis tapped at 82 volts toprovide~~middotS~tttllp~(866$)middot~fthemiddot twomiddotwiDd1np~ 68ri~ Each or thesecondshylQ7middotwindh1pmiddot1uIs100t11rns of No 21 gauge wire and israted 60 volts 10 ampere One winding Js tappbd atmiddotlaquo volts to p~vide a Scott tapor the two windings in series Shownbelow are the voltage ratings orthe various taps for each of the three traDspoundormers

~----pmMAAY----~-

t o 32V 120V 0 120V lI__

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X1 X2 X3 X4 X5 X8 X7

o 12V 24V 60V 0 44V 60V

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t bull MODEL middotRLmiddot100AmiddotRESISTANC~LOAD J J- shy~ GENERAL The RL-IOOAfs variable ftsistance unit used to applya resistivel0a4middottogenera

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tors or altemators One unit may be used in single-phase applications ora bank L of tlmae units may be combhled intQ Wye or De1taCOnt1IJDlt1~DS tor three phase

applicmioDS TiieRL-lOOA mttoduces resistieload~ ~sequentild steps r designed to prod11CB approximateiy equal ipcremeJlts otJoadmiddot~tmiddot The SPST f ~ toigle switches are numbered andmiddot must be cloSed in nUD1erl~ordertodecrease

totlreslstance~creasmglOad The total ~cemiddot or the cOb~ected~rs ( may be COmputed f~theequation L

middot 1 1 1-1 ~=R1+Ri+lt8middotmiddotmiddot

The ConowingO equations may be used to detemUne the power disSipated from a measurement of load currentor voltage

L P=EI = = I~

p (ampp) = 8 xEpBPH (tor balanced ioad)

Where P=P~inWatb

E =yoltage inVolfB I = Currentin Amperes

f R =Resistance in Ohms L P(Stp) =middotmiddotTotalPower for Three-Phase

~H ==~ Voltage per Phase~r Load Bankf L bull IpH = Ourrent per Phase ofLoad Bank ampshy

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~ SERIES 100 OPmiddotERATmiddotING INSTRUCTIONS

MODEL RLC-100RESmiddotISTANCE-REACTANmiddotCE LOAD

The RLCl00 ismiddota variable resistance and--reactance- (either ~ductive or capaci- tive) uDit that ~y be used _to apply a singl~plmse or a three-phase load The remstive load (w~ can be ~ for both middotACcd DC) is controDed by siz SPST toggle switches e8ch of which puts 2000 ohlnaof resistance in paraDelmiddot lor all three phases simultaneouslybullThe resistive-load is therefore always balanced The total resistance in eacli ph8se equals 2000- ohms divided by the Dumber of switches closed For example with two sWitehesclosedtbe total resistance-is 1000 ohms rith aUsiZ closed 8888 ohms Each or the three reactance loads (used forAC o~) separateVfused at 1 amp is controlled by a knob that varltlSthe degreeopound lead andmiddot l8g A clockwise rotationof the middotknob applies leadiIlg pOwer factor (cashypaCitive)loid while a counterc1~ rotation appIiesa lagging power factor (inductive) load There is DO lpadapplied whenthe-knob is in mid position

The 8-4-5 right triangle graph below may bemiddot~ to approximate a O~8 power factor leading or lagging

1 Appfi a resistiVe load 2 Readthe in-phase current h from -the ammeter 8 From the lR value on tlie horizontal base of the graph travel vertically to the

point where it intersects the 08 PF (total amps) line 4 Frommiddotthis point travel horizontally to the reactive current wlueIz 5 Adjust the ~ve load until the Ix ammeter reads this value of reactive cur

rent

6 To obtain a ~ced load in a three-phaseconfigaratioD repeat Step -5 for the other two~

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DIAL POSITION CAPACITANCE (CLOCKWISE)

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2 316 J1F

3 501Jlf

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5 80~J1f

6 985 j1f 7 1160middotpF

8 1360J1Fmiddot

9 1609middotJ1F

10 18~JtF

11 2007~middotF

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13 2513 )iFmiddot

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SERIES 100OPERATING INSTAUCTIONS L

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MODJL ACVA-10()ACMETERINGPANEL L GENERAL The HAMPDEN Model ACVA-1OO consistsmiddotol two AC ammetem and one AC voltshy

meterA11 or the meters are dioaeprot8cted against overloads as high 1Ui 1000f

The ~ltmeter islicctt8 within 8 w1UIemiddotthe ammeters are accurate wi~hin ~ plusmn29D ormiddotfWl sCale dellection The middotme~rshave the following ranges

r I AC Voltm~teI Oto l00~OO V~ts ~ AC Amme~ OtlJQ5f2f4l8-Amps

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OPERATION

AC AMMETERS

L 1 Connect the ammeter in series so that the middotentire AC current to be measured passes

I through the ~~ter The test lead from the dark blue middotbindingpostis connected to one

side or the Dne and the test lead trom the Qrange bin~ post to the other ~ L

2 ~e choice or measuring range is iet with the range switch Fourmiddotranges are avaiiable O 05 0204 an~ 0 - 8 amperes

8 Set the rangemiddotswitch on the 8 ampere range Detore turning on the power

a) When ~ to measure motor current put a jumper lead between the tWo binding poststo protect the movement from the large inrushcurrent at start This jumper is

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removed after the motor has started

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MODELACWM-1 GO WATIMETER PANEL

GENERAL The1iAMPDEN Model ACWMmiddotI00 consists artwo Iilulti-rangewattmeters and

I tbe~tchesh-lh~r operation Eacli has ~e follOwing ranges l

)to 1~30016~1200W

(150300Volts 2148 Amps)

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OPERATION Measure wattage bymiddotconn8cling a wattmetervoltmeter andmiddot~ete~8sshownin Figtt81 The ~-MPstttOn mustO be~middotconn~middotin series- with the ioad and-the

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VQTS con mUstmiddotbeqo~n~middotiJ1 prU9l1elwith the load protected against overloads by diodes

The Otlrrent~Coils are

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-FIGURE 1 WATTMETER CONNECnONS 14IJ -- -

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Each wa~eter has tWomiddot Voltage mtinp (150 and- 800V)~ Rotating the range -switclirounterciOCkwise from OFF engages the 150 volt range Rotatmg the _range SWitch clOQkwise from O~ engages the 800 volt range Utilize the Voltmeters readiDg to determine the approprlllte-range

Each wattmetermiddot has three currentmiddot ratings (2 4 and SA) Rotating the range swiJchfrom middotO~engages the Samprarigefbst ~ the wattm~termiddotreadsbelow ~r 8Cll18 and the ammeter indicates that the 4 amp rating will not be ~e9 ~ectmiddotthe 4 ainp range-middot If the mttnie~ again reads below balt scaie and the ammeterindicates that the 2 amp rating will no~ bemiddot exceeded the 2 amp range may bese1ectedI

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L FIGURE 2 WATTMETER CONNECTIONS 3fi1

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L middot The totalwatbge is the sum of the two meter readings PI and P2

f When pow~ in a ~ced load is m~ured in this ~er the indication or the 1

two ~eterS VlLL~PT be the same except at 1D1ity power factor middot -shy

When the power factor of the circuit is less than 509b the pointer of meter PI will reverse~ To obtain total wattage in this case reverse the current connections to metet Pl -then subtract the rea~g ormeter PI from that of meter P2

The twO-wattmeter~method cannot be used with as-phase 4-wire load Three wattmeters are ~ in that case

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POWER FACTOR i f ~

Given a balallCed load the~oWer tacentor middoteanbe -d~emiined from the two wattmeter mth6cL - ~

L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

J be calca1ated -from-the -following_equation0

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tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

wherep2 repr~ts th~~ier~thetwoWl1ttiJ1~ re~ingswhentbepower faeto~l~other thaD uPity

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BiDet th~powertaetb~ 8q1alsthcosme ofthephaseangletP~powerfactor may also be I deterJninedfromtheratioo~thetwo wittmeterreadings middotmiddotThegraph b~ow shows the1 I

I relationship between themiddotpowerfacior andth~ratio~f P1lP2 ~

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MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

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L OPERATIONI

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DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

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agt If the currePtis~ter than 5 amperes the needlewDI move off-scale TuRN OFF POVER IMliEDIATELY AJf exception to this may be on motor starling Momenshytary current inrushbullmay exceed 5 ampe~ but theneedleiminediately drops back to normal

b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

L

1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

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a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

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MODEL-1723 rACHoME~R

DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

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L SERIESmiddot1-00OPERATIN~middot INSJRUCTIONS~middot

MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

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OPEBATIONTouSe the powermiddotpanelt (lISt tum ON ~MAIN AC circuit breaker~i This will m~tethemain AC pnot Hght and 9nergize the four-pin ~Pyen~i supplying fix~208120VAOtliree-phase poWer Th~ other 1ixed~d~Je sulpHes may

l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

cuit ~~ (both ~ ~ncl BEc) A clockwise lOtation of the vol~cpntro1 -- ~ ~eause ~~~~the voltage a~ble at the appropriate 1~Ptashy

L I tNOTE ~~ ~~ltage oo~~lbob fOr the 0-208120V three-phase sUpply is ~ted at the ~nd or the

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IfanY~r~es11PplifSri-e~vefloaded one or more circuit breakers may trip middotOFF Al- ir ways turnthemiddotVariable suppllesto zero and remove the C8usaopound the oyerload before resetshy

JL ting the circuitmiddotl~~em

A pindiilg ~ groun4 oenn~oDis proVided at each end or the panel fOrgrounding the rotating macbin~

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Page 25: [1 Table D. - UTKweb.eecs.utk.edu/~jsl/ECE325/ECE325-LabManual.pdfLab #2 Load-Speed Characteristic of a DC Motor . Objective . The objective of . this . lab is to . detennine the load-speed

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OPERATION The proper ampinn~~ fo~ operation or the SM-l00-SA as an alternator are ALTERNATOR) shown in Fi8Ure ~ With tliese connections made and the switch in the SYNCL RUNposition drive the alternator at 1800 RPM With a sUitable prime mover

Energize the DC Voltage supply and increase thesupplys output to bicrease f themiddotslternatorts output voltage to the desired value Toggle the circuit breaker ~L ~ tlie ON pPSition to connect the alternators output to the load Used to

middotdemonstrate the characteristics of a polyphase alternator of the stationary arshyr mature typebull ~t may also be used asthe loading device when testing the varishyI oUsmotom- shy

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rmiddot~ FIGURE 2 L SM-10o-3A AS AN ALTERNATOR

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SERJES100 OPERATING INStRUCTIONS

oMOoDEL DMmiddot1 DDA DC MACHINE

GENERAL The DY-10OA is amiddot two-pole compound-wound machine ~g of a shunt field a series field and an armature winding A shunt fie1dmiddotr~t and two-pole startel switM are also provided in the-terminal box ~tings follow

SPECIFICAnONS

MACHINE

Shunt Field Ex SepO5A 125V Insulation CJass F middotMax Ambient Temp 40 ~C (104 OF) Rating Continl101iS Speed 1800 RPM nominal Shunt Series Compound wo~dJl1Otcr

125V SOAt 18 HP Shunt Series Compound wound generator

RHEOSTAT

Resistance Power Current middot Taper Fuse Minimum Resistance Position

STARTER

Type of Operator No of Poles Overload Type Trip Rating middot Reset Method

125V 2A 250KW

800~Ohms

100 Watts O575middotAmps Lin ear 1A SJo Blo

Toggle Two Thermal 4lAmps Push Toggle down

ENGI-NEERING CORPORATION ----MANUFACTURERS OF eoulPUEHT FOR EDUCATION ANOINOUSTRY

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L FUNCTION The primDrJ function or the DC motor is to demonstrate the characteristics of

shunt series ancl compOund motors~ It IIl8Y also bemiddotutiHzed as a prime mover when testiJlg a gel1eraloror alternator Using the DCmiddotmotor tor this PurPose has the advantage th~tbe speed may be held constant bymiddot8djusting tJie shunt field rheostat after each load step is applied

L OPERATION The -proper connections for operation as a ClUDulative compound DC motor are

(DC MOTOR) shOWDin Fipre i Withmiddot theseoonndionS made the motor may be started by moving the starter switch toggle up to the ON position It is good praetioe to stad the motor with the shunt field rh~ in its minimum resistance fully COW position to provide m8amum starting torque andmiDitnum starting Curshy

L rent The motor may then be adjusted ~ the desired speed byadjUBtingtbe field rheostat or varying the line voltage

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1 125VDO SUPPLY

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FUNCTION The DC generator is p~arily utili2ed to demonstrate the characteristics of shunt series ~dCOinpound gen~tors It is~ alsOusedastlle loading device

when testing the vari~us motors

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OPERATION The~CODnections tor operation as a cmnulative C()~po1l1ld nCgenshyeratorareshown in Figure 2 With these connectio~middotmiddotDltldeJ drive theJDCmiddotGENERATOR gen~-atapproxhnately1800RPM with a suitable p~e moVer With thefie1qrheostatJnits Jll8Ximum resistance fullyc1ocm~ position enshyergiZe thel15V DC field supply Rotate the field rheostatinthecltunter

shy clockwisedir$ctian middottoinCreasemiddot the output voltage middotto the desiredmiddot value Switch Oti~middotthemiddotoverloadmiddot switChmiddotto connect the generators output to the

resistance load

+ 1151 DC - 230 W

OUTPUT

RHEO SERIES L1

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MODEL MGmiddotBmiddot100DG BEDPLATE f

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The MG Bedplateconsists of a heayy s~ baBe n10~~middotmiddoton vibration pads The

I - GENERAL

function otthe bedplate is toe~le the quickmounting ~dcoup1mg of the two individ~ macbiDoes to form a completemiddotmiddotm~ior-Pnerator setpwothreaded hpldshy

~ down)1Ocks ~d winged screwsareprovidecltoseeurethe F t claJnps which hold tbeinBcbinetsmounting boards A couplingguard and two shaft ~gwrrds are p~

r vided to p~ttheSiudenttrom accidet1talJito~gor~~gwires0l1 rotatshy- shy ing)arts The guardsmiddotare quickly mounted bY insertirig retamer CUpS in~T~9tsin

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The procedure for mou~ting and ioupling the machines to the base is as fon~

L 1 A~just each wing screw 021- ~e two screw clamp hold~ownmiddot ~locks to the top of its threaded stud - 0

i 2 Place each ~chine so that the rear of the base is reSting agairistmiddotthemiddot thd rear clamp on thei L- MGbasemiddot

8 Slide machines iJiboara until ~elrcouplingl1anPs are centered oVer cen~ slots 4 bert rub coupnngmiddotsleevemiddot~toone of the mac1dnes co~pling 1IimgM~ L

5 Slidere~jning machines coupling flange into-the other side of couplbig sleeve 6 Checktobe Sure thatmiddot~e couplhig guard will cOver coupling when insertedmiddotinto one ot thel pails areenter slotsmiddot 7 plaCe front clamp tor each of machines against the front or the two macbiD5t bases

(- s 8 F~pr tighten ~~uts 9it middotthe two screw clamp hold-down biocks Lmiddot 9 Mount coUplini aDd shaft guards by locating appropriate retainer clips in slotS so that coushy

pling is ~der co~Ung guard and ~ sh~ is covered by a ~haft guatdL

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SERIES 100 -OPERATINGINSTRUCTIONS

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MODIL1-10oaA TRANSFClRfJIER OEMONSTRATOR

GENEijAL The TlOO-8A~~ts of three Single-phase bansformers wit~ m11Jtiple primary and secondary taps terminated atpinreceptacl~on the front of the unit Each of the three ~rOrinersmay beused independen1q Or the threemay~interconmiddot

f nected mseries~1npQmneJ or inmiddot many poJyph8seCbnfigurations

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EacbtraDslormer is~~middot af)vol~amperesat 60 Hertz ~ has two primary~d

two secoDdaqwindiIlBL Each ofthe priD1817 windiD~1tas800 turns of Nobull 24 gauge-wire and JSmiddotm~-120volta 05 amperes Onewhidingis tapped at 82 volts toprovide~~middotS~tttllp~(866$)middot~fthemiddot twomiddotwiDd1np~ 68ri~ Each or thesecondshylQ7middotwindh1pmiddot1uIs100t11rns of No 21 gauge wire and israted 60 volts 10 ampere One winding Js tappbd atmiddotlaquo volts to p~vide a Scott tapor the two windings in series Shownbelow are the voltage ratings orthe various taps for each of the three traDspoundormers

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middotSEmiddotRIES 100OPERATING INSTRUCTIONS

t bull MODEL middotRLmiddot100AmiddotRESISTANC~LOAD J J- shy~ GENERAL The RL-IOOAfs variable ftsistance unit used to applya resistivel0a4middottogenera

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tors or altemators One unit may be used in single-phase applications ora bank L of tlmae units may be combhled intQ Wye or De1taCOnt1IJDlt1~DS tor three phase

applicmioDS TiieRL-lOOA mttoduces resistieload~ ~sequentild steps r designed to prod11CB approximateiy equal ipcremeJlts otJoadmiddot~tmiddot The SPST f ~ toigle switches are numbered andmiddot must be cloSed in nUD1erl~ordertodecrease

totlreslstance~creasmglOad The total ~cemiddot or the cOb~ected~rs ( may be COmputed f~theequation L

middot 1 1 1-1 ~=R1+Ri+lt8middotmiddotmiddot

The ConowingO equations may be used to detemUne the power disSipated from a measurement of load currentor voltage

L P=EI = = I~

p (ampp) = 8 xEpBPH (tor balanced ioad)

Where P=P~inWatb

E =yoltage inVolfB I = Currentin Amperes

f R =Resistance in Ohms L P(Stp) =middotmiddotTotalPower for Three-Phase

~H ==~ Voltage per Phase~r Load Bankf L bull IpH = Ourrent per Phase ofLoad Bank ampshy

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MODEL RLC-100RESmiddotISTANCE-REACTANmiddotCE LOAD

The RLCl00 ismiddota variable resistance and--reactance- (either ~ductive or capaci- tive) uDit that ~y be used _to apply a singl~plmse or a three-phase load The remstive load (w~ can be ~ for both middotACcd DC) is controDed by siz SPST toggle switches e8ch of which puts 2000 ohlnaof resistance in paraDelmiddot lor all three phases simultaneouslybullThe resistive-load is therefore always balanced The total resistance in eacli ph8se equals 2000- ohms divided by the Dumber of switches closed For example with two sWitehesclosedtbe total resistance-is 1000 ohms rith aUsiZ closed 8888 ohms Each or the three reactance loads (used forAC o~) separateVfused at 1 amp is controlled by a knob that varltlSthe degreeopound lead andmiddot l8g A clockwise rotationof the middotknob applies leadiIlg pOwer factor (cashypaCitive)loid while a counterc1~ rotation appIiesa lagging power factor (inductive) load There is DO lpadapplied whenthe-knob is in mid position

The 8-4-5 right triangle graph below may bemiddot~ to approximate a O~8 power factor leading or lagging

1 Appfi a resistiVe load 2 Readthe in-phase current h from -the ammeter 8 From the lR value on tlie horizontal base of the graph travel vertically to the

point where it intersects the 08 PF (total amps) line 4 Frommiddotthis point travel horizontally to the reactive current wlueIz 5 Adjust the ~ve load until the Ix ammeter reads this value of reactive cur

rent

6 To obtain a ~ced load in a three-phaseconfigaratioD repeat Step -5 for the other two~

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middot11 ~ 57 Henry

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DIAL POSITION CAPACITANCE (CLOCKWISE)

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2 316 J1F

3 501Jlf

middot4 640J1F

5 80~J1f

6 985 j1f 7 1160middotpF

8 1360J1Fmiddot

9 1609middotJ1F

10 18~JtF

11 2007~middotF

12 2170 fLF

13 2513 )iFmiddot

14 2860J1F

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SERIES 100OPERATING INSTAUCTIONS L

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MODJL ACVA-10()ACMETERINGPANEL L GENERAL The HAMPDEN Model ACVA-1OO consistsmiddotol two AC ammetem and one AC voltshy

meterA11 or the meters are dioaeprot8cted against overloads as high 1Ui 1000f

The ~ltmeter islicctt8 within 8 w1UIemiddotthe ammeters are accurate wi~hin ~ plusmn29D ormiddotfWl sCale dellection The middotme~rshave the following ranges

r I AC Voltm~teI Oto l00~OO V~ts ~ AC Amme~ OtlJQ5f2f4l8-Amps

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OPERATION

AC AMMETERS

L 1 Connect the ammeter in series so that the middotentire AC current to be measured passes

I through the ~~ter The test lead from the dark blue middotbindingpostis connected to one

side or the Dne and the test lead trom the Qrange bin~ post to the other ~ L

2 ~e choice or measuring range is iet with the range switch Fourmiddotranges are avaiiable O 05 0204 an~ 0 - 8 amperes

8 Set the rangemiddotswitch on the 8 ampere range Detore turning on the power

a) When ~ to measure motor current put a jumper lead between the tWo binding poststo protect the movement from the large inrushcurrent at start This jumper is

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removed after the motor has started

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MANUFACTURERSmiddotOF rpUIPMCNT F()R EDUCATION AND INDUSTRY

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MODELACWM-1 GO WATIMETER PANEL

GENERAL The1iAMPDEN Model ACWMmiddotI00 consists artwo Iilulti-rangewattmeters and

I tbe~tchesh-lh~r operation Eacli has ~e follOwing ranges l

)to 1~30016~1200W

(150300Volts 2148 Amps)

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OPERATION Measure wattage bymiddotconn8cling a wattmetervoltmeter andmiddot~ete~8sshownin Figtt81 The ~-MPstttOn mustO be~middotconn~middotin series- with the ioad and-the

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VQTS con mUstmiddotbeqo~n~middotiJ1 prU9l1elwith the load protected against overloads by diodes

The Otlrrent~Coils are

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-FIGURE 1 WATTMETER CONNECnONS 14IJ -- -

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Each wa~eter has tWomiddot Voltage mtinp (150 and- 800V)~ Rotating the range -switclirounterciOCkwise from OFF engages the 150 volt range Rotatmg the _range SWitch clOQkwise from O~ engages the 800 volt range Utilize the Voltmeters readiDg to determine the approprlllte-range

Each wattmetermiddot has three currentmiddot ratings (2 4 and SA) Rotating the range swiJchfrom middotO~engages the Samprarigefbst ~ the wattm~termiddotreadsbelow ~r 8Cll18 and the ammeter indicates that the 4 amp rating will not be ~e9 ~ectmiddotthe 4 ainp range-middot If the mttnie~ again reads below balt scaie and the ammeterindicates that the 2 amp rating will no~ bemiddot exceeded the 2 amp range may bese1ectedI

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L FIGURE 2 WATTMETER CONNECTIONS 3fi1

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L middot The totalwatbge is the sum of the two meter readings PI and P2

f When pow~ in a ~ced load is m~ured in this ~er the indication or the 1

two ~eterS VlLL~PT be the same except at 1D1ity power factor middot -shy

When the power factor of the circuit is less than 509b the pointer of meter PI will reverse~ To obtain total wattage in this case reverse the current connections to metet Pl -then subtract the rea~g ormeter PI from that of meter P2

The twO-wattmeter~method cannot be used with as-phase 4-wire load Three wattmeters are ~ in that case

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POWER FACTOR i f ~

Given a balallCed load the~oWer tacentor middoteanbe -d~emiined from the two wattmeter mth6cL - ~

L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

J be calca1ated -from-the -following_equation0

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tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

wherep2 repr~ts th~~ier~thetwoWl1ttiJ1~ re~ingswhentbepower faeto~l~other thaD uPity

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BiDet th~powertaetb~ 8q1alsthcosme ofthephaseangletP~powerfactor may also be I deterJninedfromtheratioo~thetwo wittmeterreadings middotmiddotThegraph b~ow shows the1 I

I relationship between themiddotpowerfacior andth~ratio~f P1lP2 ~

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MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

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DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

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agt If the currePtis~ter than 5 amperes the needlewDI move off-scale TuRN OFF POVER IMliEDIATELY AJf exception to this may be on motor starling Momenshytary current inrushbullmay exceed 5 ampe~ but theneedleiminediately drops back to normal

b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

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1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

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a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

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MODEL-1723 rACHoME~R

DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

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MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

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When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

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A pindiilg ~ groun4 oenn~oDis proVided at each end or the panel fOrgrounding the rotating macbin~

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Page 26: [1 Table D. - UTKweb.eecs.utk.edu/~jsl/ECE325/ECE325-LabManual.pdfLab #2 Load-Speed Characteristic of a DC Motor . Objective . The objective of . this . lab is to . detennine the load-speed

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SERJES100 OPERATING INStRUCTIONS

oMOoDEL DMmiddot1 DDA DC MACHINE

GENERAL The DY-10OA is amiddot two-pole compound-wound machine ~g of a shunt field a series field and an armature winding A shunt fie1dmiddotr~t and two-pole startel switM are also provided in the-terminal box ~tings follow

SPECIFICAnONS

MACHINE

Shunt Field Ex SepO5A 125V Insulation CJass F middotMax Ambient Temp 40 ~C (104 OF) Rating Continl101iS Speed 1800 RPM nominal Shunt Series Compound wo~dJl1Otcr

125V SOAt 18 HP Shunt Series Compound wound generator

RHEOSTAT

Resistance Power Current middot Taper Fuse Minimum Resistance Position

STARTER

Type of Operator No of Poles Overload Type Trip Rating middot Reset Method

125V 2A 250KW

800~Ohms

100 Watts O575middotAmps Lin ear 1A SJo Blo

Toggle Two Thermal 4lAmps Push Toggle down

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L FUNCTION The primDrJ function or the DC motor is to demonstrate the characteristics of

shunt series ancl compOund motors~ It IIl8Y also bemiddotutiHzed as a prime mover when testiJlg a gel1eraloror alternator Using the DCmiddotmotor tor this PurPose has the advantage th~tbe speed may be held constant bymiddot8djusting tJie shunt field rheostat after each load step is applied

L OPERATION The -proper connections for operation as a ClUDulative compound DC motor are

(DC MOTOR) shOWDin Fipre i Withmiddot theseoonndionS made the motor may be started by moving the starter switch toggle up to the ON position It is good praetioe to stad the motor with the shunt field rh~ in its minimum resistance fully COW position to provide m8amum starting torque andmiDitnum starting Curshy

L rent The motor may then be adjusted ~ the desired speed byadjUBtingtbe field rheostat or varying the line voltage

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1 125VDO SUPPLY

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FUNCTION The DC generator is p~arily utili2ed to demonstrate the characteristics of shunt series ~dCOinpound gen~tors It is~ alsOusedastlle loading device

when testing the vari~us motors

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OPERATION The~CODnections tor operation as a cmnulative C()~po1l1ld nCgenshyeratorareshown in Figure 2 With these connectio~middotmiddotDltldeJ drive theJDCmiddotGENERATOR gen~-atapproxhnately1800RPM with a suitable p~e moVer With thefie1qrheostatJnits Jll8Ximum resistance fullyc1ocm~ position enshyergiZe thel15V DC field supply Rotate the field rheostatinthecltunter

shy clockwisedir$ctian middottoinCreasemiddot the output voltage middotto the desiredmiddot value Switch Oti~middotthemiddotoverloadmiddot switChmiddotto connect the generators output to the

resistance load

+ 1151 DC - 230 W

OUTPUT

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MODEL MGmiddotBmiddot100DG BEDPLATE f

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The MG Bedplateconsists of a heayy s~ baBe n10~~middotmiddoton vibration pads The

I - GENERAL

function otthe bedplate is toe~le the quickmounting ~dcoup1mg of the two individ~ macbiDoes to form a completemiddotmiddotm~ior-Pnerator setpwothreaded hpldshy

~ down)1Ocks ~d winged screwsareprovidecltoseeurethe F t claJnps which hold tbeinBcbinetsmounting boards A couplingguard and two shaft ~gwrrds are p~

r vided to p~ttheSiudenttrom accidet1talJito~gor~~gwires0l1 rotatshy- shy ing)arts The guardsmiddotare quickly mounted bY insertirig retamer CUpS in~T~9tsin

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The procedure for mou~ting and ioupling the machines to the base is as fon~

L 1 A~just each wing screw 021- ~e two screw clamp hold~ownmiddot ~locks to the top of its threaded stud - 0

i 2 Place each ~chine so that the rear of the base is reSting agairistmiddotthemiddot thd rear clamp on thei L- MGbasemiddot

8 Slide machines iJiboara until ~elrcouplingl1anPs are centered oVer cen~ slots 4 bert rub coupnngmiddotsleevemiddot~toone of the mac1dnes co~pling 1IimgM~ L

5 Slidere~jning machines coupling flange into-the other side of couplbig sleeve 6 Checktobe Sure thatmiddot~e couplhig guard will cOver coupling when insertedmiddotinto one ot thel pails areenter slotsmiddot 7 plaCe front clamp tor each of machines against the front or the two macbiD5t bases

(- s 8 F~pr tighten ~~uts 9it middotthe two screw clamp hold-down biocks Lmiddot 9 Mount coUplini aDd shaft guards by locating appropriate retainer clips in slotS so that coushy

pling is ~der co~Ung guard and ~ sh~ is covered by a ~haft guatdL

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SERIES 100 -OPERATINGINSTRUCTIONS

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MODIL1-10oaA TRANSFClRfJIER OEMONSTRATOR

GENEijAL The TlOO-8A~~ts of three Single-phase bansformers wit~ m11Jtiple primary and secondary taps terminated atpinreceptacl~on the front of the unit Each of the three ~rOrinersmay beused independen1q Or the threemay~interconmiddot

f nected mseries~1npQmneJ or inmiddot many poJyph8seCbnfigurations

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EacbtraDslormer is~~middot af)vol~amperesat 60 Hertz ~ has two primary~d

two secoDdaqwindiIlBL Each ofthe priD1817 windiD~1tas800 turns of Nobull 24 gauge-wire and JSmiddotm~-120volta 05 amperes Onewhidingis tapped at 82 volts toprovide~~middotS~tttllp~(866$)middot~fthemiddot twomiddotwiDd1np~ 68ri~ Each or thesecondshylQ7middotwindh1pmiddot1uIs100t11rns of No 21 gauge wire and israted 60 volts 10 ampere One winding Js tappbd atmiddotlaquo volts to p~vide a Scott tapor the two windings in series Shownbelow are the voltage ratings orthe various taps for each of the three traDspoundormers

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t o 32V 120V 0 120V lI__

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X1 X2 X3 X4 X5 X8 X7

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t bull MODEL middotRLmiddot100AmiddotRESISTANC~LOAD J J- shy~ GENERAL The RL-IOOAfs variable ftsistance unit used to applya resistivel0a4middottogenera

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tors or altemators One unit may be used in single-phase applications ora bank L of tlmae units may be combhled intQ Wye or De1taCOnt1IJDlt1~DS tor three phase

applicmioDS TiieRL-lOOA mttoduces resistieload~ ~sequentild steps r designed to prod11CB approximateiy equal ipcremeJlts otJoadmiddot~tmiddot The SPST f ~ toigle switches are numbered andmiddot must be cloSed in nUD1erl~ordertodecrease

totlreslstance~creasmglOad The total ~cemiddot or the cOb~ected~rs ( may be COmputed f~theequation L

middot 1 1 1-1 ~=R1+Ri+lt8middotmiddotmiddot

The ConowingO equations may be used to detemUne the power disSipated from a measurement of load currentor voltage

L P=EI = = I~

p (ampp) = 8 xEpBPH (tor balanced ioad)

Where P=P~inWatb

E =yoltage inVolfB I = Currentin Amperes

f R =Resistance in Ohms L P(Stp) =middotmiddotTotalPower for Three-Phase

~H ==~ Voltage per Phase~r Load Bankf L bull IpH = Ourrent per Phase ofLoad Bank ampshy

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FROM AC OR DC SOURCE

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3f1 SOURCE

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~ SERIES 100 OPmiddotERATmiddotING INSTRUCTIONS

MODEL RLC-100RESmiddotISTANCE-REACTANmiddotCE LOAD

The RLCl00 ismiddota variable resistance and--reactance- (either ~ductive or capaci- tive) uDit that ~y be used _to apply a singl~plmse or a three-phase load The remstive load (w~ can be ~ for both middotACcd DC) is controDed by siz SPST toggle switches e8ch of which puts 2000 ohlnaof resistance in paraDelmiddot lor all three phases simultaneouslybullThe resistive-load is therefore always balanced The total resistance in eacli ph8se equals 2000- ohms divided by the Dumber of switches closed For example with two sWitehesclosedtbe total resistance-is 1000 ohms rith aUsiZ closed 8888 ohms Each or the three reactance loads (used forAC o~) separateVfused at 1 amp is controlled by a knob that varltlSthe degreeopound lead andmiddot l8g A clockwise rotationof the middotknob applies leadiIlg pOwer factor (cashypaCitive)loid while a counterc1~ rotation appIiesa lagging power factor (inductive) load There is DO lpadapplied whenthe-knob is in mid position

The 8-4-5 right triangle graph below may bemiddot~ to approximate a O~8 power factor leading or lagging

1 Appfi a resistiVe load 2 Readthe in-phase current h from -the ammeter 8 From the lR value on tlie horizontal base of the graph travel vertically to the

point where it intersects the 08 PF (total amps) line 4 Frommiddotthis point travel horizontally to the reactive current wlueIz 5 Adjust the ~ve load until the Ix ammeter reads this value of reactive cur

rent

6 To obtain a ~ced load in a three-phaseconfigaratioD repeat Step -5 for the other two~

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RESISTIVE AMPERES

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-17 35 Henry

-13 47 Henry

middotINDUCTANCEDIAL POSITIONmiddot (~middotQLJNT~RCmiddotLOCKWJSE)

-12 51 Henry

middot11 ~ 57 Henry

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-15 ~41middotmiddotHQIllY

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-7 97 HefJry

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DIAL POSITION CAPACITANCE (CLOCKWISE)

0 69 llF

1 1~57 J1F

2 316 J1F

3 501Jlf

middot4 640J1F

5 80~J1f

6 985 j1f 7 1160middotpF

8 1360J1Fmiddot

9 1609middotJ1F

10 18~JtF

11 2007~middotF

12 2170 fLF

13 2513 )iFmiddot

14 2860J1F

15 3090 pFmiddot

15 3269JlF

17 3539 JlFmiddot (

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SERIES 100OPERATING INSTAUCTIONS L

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MODJL ACVA-10()ACMETERINGPANEL L GENERAL The HAMPDEN Model ACVA-1OO consistsmiddotol two AC ammetem and one AC voltshy

meterA11 or the meters are dioaeprot8cted against overloads as high 1Ui 1000f

The ~ltmeter islicctt8 within 8 w1UIemiddotthe ammeters are accurate wi~hin ~ plusmn29D ormiddotfWl sCale dellection The middotme~rshave the following ranges

r I AC Voltm~teI Oto l00~OO V~ts ~ AC Amme~ OtlJQ5f2f4l8-Amps

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OPERATION

AC AMMETERS

L 1 Connect the ammeter in series so that the middotentire AC current to be measured passes

I through the ~~ter The test lead from the dark blue middotbindingpostis connected to one

side or the Dne and the test lead trom the Qrange bin~ post to the other ~ L

2 ~e choice or measuring range is iet with the range switch Fourmiddotranges are avaiiable O 05 0204 an~ 0 - 8 amperes

8 Set the rangemiddotswitch on the 8 ampere range Detore turning on the power

a) When ~ to measure motor current put a jumper lead between the tWo binding poststo protect the movement from the large inrushcurrent at start This jumper is

(

removed after the motor has started

--~---~--~_--------~---_~_----ENGINEERfNG CORPORATION

MANUFACTURERSmiddotOF rpUIPMCNT F()R EDUCATION AND INDUSTRY

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GENERAL The1iAMPDEN Model ACWMmiddotI00 consists artwo Iilulti-rangewattmeters and

I tbe~tchesh-lh~r operation Eacli has ~e follOwing ranges l

)to 1~30016~1200W

(150300Volts 2148 Amps)

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OPERATION Measure wattage bymiddotconn8cling a wattmetervoltmeter andmiddot~ete~8sshownin Figtt81 The ~-MPstttOn mustO be~middotconn~middotin series- with the ioad and-the

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VQTS con mUstmiddotbeqo~n~middotiJ1 prU9l1elwith the load protected against overloads by diodes

The Otlrrent~Coils are

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-FIGURE 1 WATTMETER CONNECnONS 14IJ -- -

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Each wa~eter has tWomiddot Voltage mtinp (150 and- 800V)~ Rotating the range -switclirounterciOCkwise from OFF engages the 150 volt range Rotatmg the _range SWitch clOQkwise from O~ engages the 800 volt range Utilize the Voltmeters readiDg to determine the approprlllte-range

Each wattmetermiddot has three currentmiddot ratings (2 4 and SA) Rotating the range swiJchfrom middotO~engages the Samprarigefbst ~ the wattm~termiddotreadsbelow ~r 8Cll18 and the ammeter indicates that the 4 amp rating will not be ~e9 ~ectmiddotthe 4 ainp range-middot If the mttnie~ again reads below balt scaie and the ammeterindicates that the 2 amp rating will no~ bemiddot exceeded the 2 amp range may bese1ectedI

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L FIGURE 2 WATTMETER CONNECTIONS 3fi1

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L middot The totalwatbge is the sum of the two meter readings PI and P2

f When pow~ in a ~ced load is m~ured in this ~er the indication or the 1

two ~eterS VlLL~PT be the same except at 1D1ity power factor middot -shy

When the power factor of the circuit is less than 509b the pointer of meter PI will reverse~ To obtain total wattage in this case reverse the current connections to metet Pl -then subtract the rea~g ormeter PI from that of meter P2

The twO-wattmeter~method cannot be used with as-phase 4-wire load Three wattmeters are ~ in that case

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POWER FACTOR i f ~

Given a balallCed load the~oWer tacentor middoteanbe -d~emiined from the two wattmeter mth6cL - ~

L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

J be calca1ated -from-the -following_equation0

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tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

wherep2 repr~ts th~~ier~thetwoWl1ttiJ1~ re~ingswhentbepower faeto~l~other thaD uPity

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BiDet th~powertaetb~ 8q1alsthcosme ofthephaseangletP~powerfactor may also be I deterJninedfromtheratioo~thetwo wittmeterreadings middotmiddotThegraph b~ow shows the1 I

I relationship between themiddotpowerfacior andth~ratio~f P1lP2 ~

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MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

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L OPERATIONI

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DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

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b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

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1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

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a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

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DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

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MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

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OPEBATIONTouSe the powermiddotpanelt (lISt tum ON ~MAIN AC circuit breaker~i This will m~tethemain AC pnot Hght and 9nergize the four-pin ~Pyen~i supplying fix~208120VAOtliree-phase poWer Th~ other 1ixed~d~Je sulpHes may

l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

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IfanY~r~es11PplifSri-e~vefloaded one or more circuit breakers may trip middotOFF Al- ir ways turnthemiddotVariable suppllesto zero and remove the C8usaopound the oyerload before resetshy

JL ting the circuitmiddotl~~em

A pindiilg ~ groun4 oenn~oDis proVided at each end or the panel fOrgrounding the rotating macbin~

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Page 27: [1 Table D. - UTKweb.eecs.utk.edu/~jsl/ECE325/ECE325-LabManual.pdfLab #2 Load-Speed Characteristic of a DC Motor . Objective . The objective of . this . lab is to . detennine the load-speed

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L FUNCTION The primDrJ function or the DC motor is to demonstrate the characteristics of

shunt series ancl compOund motors~ It IIl8Y also bemiddotutiHzed as a prime mover when testiJlg a gel1eraloror alternator Using the DCmiddotmotor tor this PurPose has the advantage th~tbe speed may be held constant bymiddot8djusting tJie shunt field rheostat after each load step is applied

L OPERATION The -proper connections for operation as a ClUDulative compound DC motor are

(DC MOTOR) shOWDin Fipre i Withmiddot theseoonndionS made the motor may be started by moving the starter switch toggle up to the ON position It is good praetioe to stad the motor with the shunt field rh~ in its minimum resistance fully COW position to provide m8amum starting torque andmiDitnum starting Curshy

L rent The motor may then be adjusted ~ the desired speed byadjUBtingtbe field rheostat or varying the line voltage

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FUNCTION The DC generator is p~arily utili2ed to demonstrate the characteristics of shunt series ~dCOinpound gen~tors It is~ alsOusedastlle loading device

when testing the vari~us motors

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OPERATION The~CODnections tor operation as a cmnulative C()~po1l1ld nCgenshyeratorareshown in Figure 2 With these connectio~middotmiddotDltldeJ drive theJDCmiddotGENERATOR gen~-atapproxhnately1800RPM with a suitable p~e moVer With thefie1qrheostatJnits Jll8Ximum resistance fullyc1ocm~ position enshyergiZe thel15V DC field supply Rotate the field rheostatinthecltunter

shy clockwisedir$ctian middottoinCreasemiddot the output voltage middotto the desiredmiddot value Switch Oti~middotthemiddotoverloadmiddot switChmiddotto connect the generators output to the

resistance load

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OUTPUT

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MODEL MGmiddotBmiddot100DG BEDPLATE f

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The MG Bedplateconsists of a heayy s~ baBe n10~~middotmiddoton vibration pads The

I - GENERAL

function otthe bedplate is toe~le the quickmounting ~dcoup1mg of the two individ~ macbiDoes to form a completemiddotmiddotm~ior-Pnerator setpwothreaded hpldshy

~ down)1Ocks ~d winged screwsareprovidecltoseeurethe F t claJnps which hold tbeinBcbinetsmounting boards A couplingguard and two shaft ~gwrrds are p~

r vided to p~ttheSiudenttrom accidet1talJito~gor~~gwires0l1 rotatshy- shy ing)arts The guardsmiddotare quickly mounted bY insertirig retamer CUpS in~T~9tsin

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The procedure for mou~ting and ioupling the machines to the base is as fon~

L 1 A~just each wing screw 021- ~e two screw clamp hold~ownmiddot ~locks to the top of its threaded stud - 0

i 2 Place each ~chine so that the rear of the base is reSting agairistmiddotthemiddot thd rear clamp on thei L- MGbasemiddot

8 Slide machines iJiboara until ~elrcouplingl1anPs are centered oVer cen~ slots 4 bert rub coupnngmiddotsleevemiddot~toone of the mac1dnes co~pling 1IimgM~ L

5 Slidere~jning machines coupling flange into-the other side of couplbig sleeve 6 Checktobe Sure thatmiddot~e couplhig guard will cOver coupling when insertedmiddotinto one ot thel pails areenter slotsmiddot 7 plaCe front clamp tor each of machines against the front or the two macbiD5t bases

(- s 8 F~pr tighten ~~uts 9it middotthe two screw clamp hold-down biocks Lmiddot 9 Mount coUplini aDd shaft guards by locating appropriate retainer clips in slotS so that coushy

pling is ~der co~Ung guard and ~ sh~ is covered by a ~haft guatdL

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SERIES 100 -OPERATINGINSTRUCTIONS

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MODIL1-10oaA TRANSFClRfJIER OEMONSTRATOR

GENEijAL The TlOO-8A~~ts of three Single-phase bansformers wit~ m11Jtiple primary and secondary taps terminated atpinreceptacl~on the front of the unit Each of the three ~rOrinersmay beused independen1q Or the threemay~interconmiddot

f nected mseries~1npQmneJ or inmiddot many poJyph8seCbnfigurations

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EacbtraDslormer is~~middot af)vol~amperesat 60 Hertz ~ has two primary~d

two secoDdaqwindiIlBL Each ofthe priD1817 windiD~1tas800 turns of Nobull 24 gauge-wire and JSmiddotm~-120volta 05 amperes Onewhidingis tapped at 82 volts toprovide~~middotS~tttllp~(866$)middot~fthemiddot twomiddotwiDd1np~ 68ri~ Each or thesecondshylQ7middotwindh1pmiddot1uIs100t11rns of No 21 gauge wire and israted 60 volts 10 ampere One winding Js tappbd atmiddotlaquo volts to p~vide a Scott tapor the two windings in series Shownbelow are the voltage ratings orthe various taps for each of the three traDspoundormers

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t o 32V 120V 0 120V lI__

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X1 X2 X3 X4 X5 X8 X7

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middotSEmiddotRIES 100OPERATING INSTRUCTIONS

t bull MODEL middotRLmiddot100AmiddotRESISTANC~LOAD J J- shy~ GENERAL The RL-IOOAfs variable ftsistance unit used to applya resistivel0a4middottogenera

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tors or altemators One unit may be used in single-phase applications ora bank L of tlmae units may be combhled intQ Wye or De1taCOnt1IJDlt1~DS tor three phase

applicmioDS TiieRL-lOOA mttoduces resistieload~ ~sequentild steps r designed to prod11CB approximateiy equal ipcremeJlts otJoadmiddot~tmiddot The SPST f ~ toigle switches are numbered andmiddot must be cloSed in nUD1erl~ordertodecrease

totlreslstance~creasmglOad The total ~cemiddot or the cOb~ected~rs ( may be COmputed f~theequation L

middot 1 1 1-1 ~=R1+Ri+lt8middotmiddotmiddot

The ConowingO equations may be used to detemUne the power disSipated from a measurement of load currentor voltage

L P=EI = = I~

p (ampp) = 8 xEpBPH (tor balanced ioad)

Where P=P~inWatb

E =yoltage inVolfB I = Currentin Amperes

f R =Resistance in Ohms L P(Stp) =middotmiddotTotalPower for Three-Phase

~H ==~ Voltage per Phase~r Load Bankf L bull IpH = Ourrent per Phase ofLoad Bank ampshy

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3f1 SOURCE

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~ SERIES 100 OPmiddotERATmiddotING INSTRUCTIONS

MODEL RLC-100RESmiddotISTANCE-REACTANmiddotCE LOAD

The RLCl00 ismiddota variable resistance and--reactance- (either ~ductive or capaci- tive) uDit that ~y be used _to apply a singl~plmse or a three-phase load The remstive load (w~ can be ~ for both middotACcd DC) is controDed by siz SPST toggle switches e8ch of which puts 2000 ohlnaof resistance in paraDelmiddot lor all three phases simultaneouslybullThe resistive-load is therefore always balanced The total resistance in eacli ph8se equals 2000- ohms divided by the Dumber of switches closed For example with two sWitehesclosedtbe total resistance-is 1000 ohms rith aUsiZ closed 8888 ohms Each or the three reactance loads (used forAC o~) separateVfused at 1 amp is controlled by a knob that varltlSthe degreeopound lead andmiddot l8g A clockwise rotationof the middotknob applies leadiIlg pOwer factor (cashypaCitive)loid while a counterc1~ rotation appIiesa lagging power factor (inductive) load There is DO lpadapplied whenthe-knob is in mid position

The 8-4-5 right triangle graph below may bemiddot~ to approximate a O~8 power factor leading or lagging

1 Appfi a resistiVe load 2 Readthe in-phase current h from -the ammeter 8 From the lR value on tlie horizontal base of the graph travel vertically to the

point where it intersects the 08 PF (total amps) line 4 Frommiddotthis point travel horizontally to the reactive current wlueIz 5 Adjust the ~ve load until the Ix ammeter reads this value of reactive cur

rent

6 To obtain a ~ced load in a three-phaseconfigaratioD repeat Step -5 for the other two~

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RESISTIVE AMPERES

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-17 35 Henry

-13 47 Henry

middotINDUCTANCEDIAL POSITIONmiddot (~middotQLJNT~RCmiddotLOCKWJSE)

-12 51 Henry

middot11 ~ 57 Henry

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-7 97 HefJry

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DIAL POSITION CAPACITANCE (CLOCKWISE)

0 69 llF

1 1~57 J1F

2 316 J1F

3 501Jlf

middot4 640J1F

5 80~J1f

6 985 j1f 7 1160middotpF

8 1360J1Fmiddot

9 1609middotJ1F

10 18~JtF

11 2007~middotF

12 2170 fLF

13 2513 )iFmiddot

14 2860J1F

15 3090 pFmiddot

15 3269JlF

17 3539 JlFmiddot (

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SERIES 100OPERATING INSTAUCTIONS L

- -

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MODJL ACVA-10()ACMETERINGPANEL L GENERAL The HAMPDEN Model ACVA-1OO consistsmiddotol two AC ammetem and one AC voltshy

meterA11 or the meters are dioaeprot8cted against overloads as high 1Ui 1000f

The ~ltmeter islicctt8 within 8 w1UIemiddotthe ammeters are accurate wi~hin ~ plusmn29D ormiddotfWl sCale dellection The middotme~rshave the following ranges

r I AC Voltm~teI Oto l00~OO V~ts ~ AC Amme~ OtlJQ5f2f4l8-Amps

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OPERATION

AC AMMETERS

L 1 Connect the ammeter in series so that the middotentire AC current to be measured passes

I through the ~~ter The test lead from the dark blue middotbindingpostis connected to one

side or the Dne and the test lead trom the Qrange bin~ post to the other ~ L

2 ~e choice or measuring range is iet with the range switch Fourmiddotranges are avaiiable O 05 0204 an~ 0 - 8 amperes

8 Set the rangemiddotswitch on the 8 ampere range Detore turning on the power

a) When ~ to measure motor current put a jumper lead between the tWo binding poststo protect the movement from the large inrushcurrent at start This jumper is

(

removed after the motor has started

--~---~--~_--------~---_~_----ENGINEERfNG CORPORATION

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MODELACWM-1 GO WATIMETER PANEL

GENERAL The1iAMPDEN Model ACWMmiddotI00 consists artwo Iilulti-rangewattmeters and

I tbe~tchesh-lh~r operation Eacli has ~e follOwing ranges l

)to 1~30016~1200W

(150300Volts 2148 Amps)

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OPERATION Measure wattage bymiddotconn8cling a wattmetervoltmeter andmiddot~ete~8sshownin Figtt81 The ~-MPstttOn mustO be~middotconn~middotin series- with the ioad and-the

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VQTS con mUstmiddotbeqo~n~middotiJ1 prU9l1elwith the load protected against overloads by diodes

The Otlrrent~Coils are

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-FIGURE 1 WATTMETER CONNECnONS 14IJ -- -

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Each wa~eter has tWomiddot Voltage mtinp (150 and- 800V)~ Rotating the range -switclirounterciOCkwise from OFF engages the 150 volt range Rotatmg the _range SWitch clOQkwise from O~ engages the 800 volt range Utilize the Voltmeters readiDg to determine the approprlllte-range

Each wattmetermiddot has three currentmiddot ratings (2 4 and SA) Rotating the range swiJchfrom middotO~engages the Samprarigefbst ~ the wattm~termiddotreadsbelow ~r 8Cll18 and the ammeter indicates that the 4 amp rating will not be ~e9 ~ectmiddotthe 4 ainp range-middot If the mttnie~ again reads below balt scaie and the ammeterindicates that the 2 amp rating will no~ bemiddot exceeded the 2 amp range may bese1ectedI

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L FIGURE 2 WATTMETER CONNECTIONS 3fi1

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L middot The totalwatbge is the sum of the two meter readings PI and P2

f When pow~ in a ~ced load is m~ured in this ~er the indication or the 1

two ~eterS VlLL~PT be the same except at 1D1ity power factor middot -shy

When the power factor of the circuit is less than 509b the pointer of meter PI will reverse~ To obtain total wattage in this case reverse the current connections to metet Pl -then subtract the rea~g ormeter PI from that of meter P2

The twO-wattmeter~method cannot be used with as-phase 4-wire load Three wattmeters are ~ in that case

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POWER FACTOR i f ~

Given a balallCed load the~oWer tacentor middoteanbe -d~emiined from the two wattmeter mth6cL - ~

L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

J be calca1ated -from-the -following_equation0

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tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

wherep2 repr~ts th~~ier~thetwoWl1ttiJ1~ re~ingswhentbepower faeto~l~other thaD uPity

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BiDet th~powertaetb~ 8q1alsthcosme ofthephaseangletP~powerfactor may also be I deterJninedfromtheratioo~thetwo wittmeterreadings middotmiddotThegraph b~ow shows the1 I

I relationship between themiddotpowerfacior andth~ratio~f P1lP2 ~

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MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

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DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

L shy6IfIamp_0 middotEN G I NmiddotEmiddotEmiddotR ING COR PO RmiddotATi ()N

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agt If the currePtis~ter than 5 amperes the needlewDI move off-scale TuRN OFF POVER IMliEDIATELY AJf exception to this may be on motor starling Momenshytary current inrushbullmay exceed 5 ampe~ but theneedleiminediately drops back to normal

b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

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1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

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a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

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MODEL-1723 rACHoME~R

DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

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MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

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OPEBATIONTouSe the powermiddotpanelt (lISt tum ON ~MAIN AC circuit breaker~i This will m~tethemain AC pnot Hght and 9nergize the four-pin ~Pyen~i supplying fix~208120VAOtliree-phase poWer Th~ other 1ixed~d~Je sulpHes may

l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

cuit ~~ (both ~ ~ncl BEc) A clockwise lOtation of the vol~cpntro1 -- ~ ~eause ~~~~the voltage a~ble at the appropriate 1~Ptashy

L I tNOTE ~~ ~~ltage oo~~lbob fOr the 0-208120V three-phase sUpply is ~ted at the ~nd or the

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IfanY~r~es11PplifSri-e~vefloaded one or more circuit breakers may trip middotOFF Al- ir ways turnthemiddotVariable suppllesto zero and remove the C8usaopound the oyerload before resetshy

JL ting the circuitmiddotl~~em

A pindiilg ~ groun4 oenn~oDis proVided at each end or the panel fOrgrounding the rotating macbin~

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Page 28: [1 Table D. - UTKweb.eecs.utk.edu/~jsl/ECE325/ECE325-LabManual.pdfLab #2 Load-Speed Characteristic of a DC Motor . Objective . The objective of . this . lab is to . detennine the load-speed

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FUNCTION The DC generator is p~arily utili2ed to demonstrate the characteristics of shunt series ~dCOinpound gen~tors It is~ alsOusedastlle loading device

when testing the vari~us motors

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OPERATION The~CODnections tor operation as a cmnulative C()~po1l1ld nCgenshyeratorareshown in Figure 2 With these connectio~middotmiddotDltldeJ drive theJDCmiddotGENERATOR gen~-atapproxhnately1800RPM with a suitable p~e moVer With thefie1qrheostatJnits Jll8Ximum resistance fullyc1ocm~ position enshyergiZe thel15V DC field supply Rotate the field rheostatinthecltunter

shy clockwisedir$ctian middottoinCreasemiddot the output voltage middotto the desiredmiddot value Switch Oti~middotthemiddotoverloadmiddot switChmiddotto connect the generators output to the

resistance load

+ 1151 DC - 230 W

OUTPUT

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MODEL MGmiddotBmiddot100DG BEDPLATE f

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The MG Bedplateconsists of a heayy s~ baBe n10~~middotmiddoton vibration pads The

I - GENERAL

function otthe bedplate is toe~le the quickmounting ~dcoup1mg of the two individ~ macbiDoes to form a completemiddotmiddotm~ior-Pnerator setpwothreaded hpldshy

~ down)1Ocks ~d winged screwsareprovidecltoseeurethe F t claJnps which hold tbeinBcbinetsmounting boards A couplingguard and two shaft ~gwrrds are p~

r vided to p~ttheSiudenttrom accidet1talJito~gor~~gwires0l1 rotatshy- shy ing)arts The guardsmiddotare quickly mounted bY insertirig retamer CUpS in~T~9tsin

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The procedure for mou~ting and ioupling the machines to the base is as fon~

L 1 A~just each wing screw 021- ~e two screw clamp hold~ownmiddot ~locks to the top of its threaded stud - 0

i 2 Place each ~chine so that the rear of the base is reSting agairistmiddotthemiddot thd rear clamp on thei L- MGbasemiddot

8 Slide machines iJiboara until ~elrcouplingl1anPs are centered oVer cen~ slots 4 bert rub coupnngmiddotsleevemiddot~toone of the mac1dnes co~pling 1IimgM~ L

5 Slidere~jning machines coupling flange into-the other side of couplbig sleeve 6 Checktobe Sure thatmiddot~e couplhig guard will cOver coupling when insertedmiddotinto one ot thel pails areenter slotsmiddot 7 plaCe front clamp tor each of machines against the front or the two macbiD5t bases

(- s 8 F~pr tighten ~~uts 9it middotthe two screw clamp hold-down biocks Lmiddot 9 Mount coUplini aDd shaft guards by locating appropriate retainer clips in slotS so that coushy

pling is ~der co~Ung guard and ~ sh~ is covered by a ~haft guatdL

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SERIES 100 -OPERATINGINSTRUCTIONS

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MODIL1-10oaA TRANSFClRfJIER OEMONSTRATOR

GENEijAL The TlOO-8A~~ts of three Single-phase bansformers wit~ m11Jtiple primary and secondary taps terminated atpinreceptacl~on the front of the unit Each of the three ~rOrinersmay beused independen1q Or the threemay~interconmiddot

f nected mseries~1npQmneJ or inmiddot many poJyph8seCbnfigurations

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EacbtraDslormer is~~middot af)vol~amperesat 60 Hertz ~ has two primary~d

two secoDdaqwindiIlBL Each ofthe priD1817 windiD~1tas800 turns of Nobull 24 gauge-wire and JSmiddotm~-120volta 05 amperes Onewhidingis tapped at 82 volts toprovide~~middotS~tttllp~(866$)middot~fthemiddot twomiddotwiDd1np~ 68ri~ Each or thesecondshylQ7middotwindh1pmiddot1uIs100t11rns of No 21 gauge wire and israted 60 volts 10 ampere One winding Js tappbd atmiddotlaquo volts to p~vide a Scott tapor the two windings in series Shownbelow are the voltage ratings orthe various taps for each of the three traDspoundormers

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t o 32V 120V 0 120V lI__

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X1 X2 X3 X4 X5 X8 X7

o 12V 24V 60V 0 44V 60V

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middotSEmiddotRIES 100OPERATING INSTRUCTIONS

t bull MODEL middotRLmiddot100AmiddotRESISTANC~LOAD J J- shy~ GENERAL The RL-IOOAfs variable ftsistance unit used to applya resistivel0a4middottogenera

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tors or altemators One unit may be used in single-phase applications ora bank L of tlmae units may be combhled intQ Wye or De1taCOnt1IJDlt1~DS tor three phase

applicmioDS TiieRL-lOOA mttoduces resistieload~ ~sequentild steps r designed to prod11CB approximateiy equal ipcremeJlts otJoadmiddot~tmiddot The SPST f ~ toigle switches are numbered andmiddot must be cloSed in nUD1erl~ordertodecrease

totlreslstance~creasmglOad The total ~cemiddot or the cOb~ected~rs ( may be COmputed f~theequation L

middot 1 1 1-1 ~=R1+Ri+lt8middotmiddotmiddot

The ConowingO equations may be used to detemUne the power disSipated from a measurement of load currentor voltage

L P=EI = = I~

p (ampp) = 8 xEpBPH (tor balanced ioad)

Where P=P~inWatb

E =yoltage inVolfB I = Currentin Amperes

f R =Resistance in Ohms L P(Stp) =middotmiddotTotalPower for Three-Phase

~H ==~ Voltage per Phase~r Load Bankf L bull IpH = Ourrent per Phase ofLoad Bank ampshy

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~ SERIES 100 OPmiddotERATmiddotING INSTRUCTIONS

MODEL RLC-100RESmiddotISTANCE-REACTANmiddotCE LOAD

The RLCl00 ismiddota variable resistance and--reactance- (either ~ductive or capaci- tive) uDit that ~y be used _to apply a singl~plmse or a three-phase load The remstive load (w~ can be ~ for both middotACcd DC) is controDed by siz SPST toggle switches e8ch of which puts 2000 ohlnaof resistance in paraDelmiddot lor all three phases simultaneouslybullThe resistive-load is therefore always balanced The total resistance in eacli ph8se equals 2000- ohms divided by the Dumber of switches closed For example with two sWitehesclosedtbe total resistance-is 1000 ohms rith aUsiZ closed 8888 ohms Each or the three reactance loads (used forAC o~) separateVfused at 1 amp is controlled by a knob that varltlSthe degreeopound lead andmiddot l8g A clockwise rotationof the middotknob applies leadiIlg pOwer factor (cashypaCitive)loid while a counterc1~ rotation appIiesa lagging power factor (inductive) load There is DO lpadapplied whenthe-knob is in mid position

The 8-4-5 right triangle graph below may bemiddot~ to approximate a O~8 power factor leading or lagging

1 Appfi a resistiVe load 2 Readthe in-phase current h from -the ammeter 8 From the lR value on tlie horizontal base of the graph travel vertically to the

point where it intersects the 08 PF (total amps) line 4 Frommiddotthis point travel horizontally to the reactive current wlueIz 5 Adjust the ~ve load until the Ix ammeter reads this value of reactive cur

rent

6 To obtain a ~ced load in a three-phaseconfigaratioD repeat Step -5 for the other two~

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RESISTIVE AMPERES

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-17 35 Henry

-13 47 Henry

middotINDUCTANCEDIAL POSITIONmiddot (~middotQLJNT~RCmiddotLOCKWJSE)

-12 51 Henry

middot11 ~ 57 Henry

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~9 bull74H~

~ 85Heol

-5 143H~nrYmiddot

-15 ~41middotmiddotHQIllY

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-16 37 Henry~

-7 97 HefJry

middot6 middot1tt~H~nry

-18 33 HenlY

DIAL POSITION CAPACITANCE (CLOCKWISE)

0 69 llF

1 1~57 J1F

2 316 J1F

3 501Jlf

middot4 640J1F

5 80~J1f

6 985 j1f 7 1160middotpF

8 1360J1Fmiddot

9 1609middotJ1F

10 18~JtF

11 2007~middotF

12 2170 fLF

13 2513 )iFmiddot

14 2860J1F

15 3090 pFmiddot

15 3269JlF

17 3539 JlFmiddot (

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SERIES 100OPERATING INSTAUCTIONS L

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MODJL ACVA-10()ACMETERINGPANEL L GENERAL The HAMPDEN Model ACVA-1OO consistsmiddotol two AC ammetem and one AC voltshy

meterA11 or the meters are dioaeprot8cted against overloads as high 1Ui 1000f

The ~ltmeter islicctt8 within 8 w1UIemiddotthe ammeters are accurate wi~hin ~ plusmn29D ormiddotfWl sCale dellection The middotme~rshave the following ranges

r I AC Voltm~teI Oto l00~OO V~ts ~ AC Amme~ OtlJQ5f2f4l8-Amps

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OPERATION

AC AMMETERS

L 1 Connect the ammeter in series so that the middotentire AC current to be measured passes

I through the ~~ter The test lead from the dark blue middotbindingpostis connected to one

side or the Dne and the test lead trom the Qrange bin~ post to the other ~ L

2 ~e choice or measuring range is iet with the range switch Fourmiddotranges are avaiiable O 05 0204 an~ 0 - 8 amperes

8 Set the rangemiddotswitch on the 8 ampere range Detore turning on the power

a) When ~ to measure motor current put a jumper lead between the tWo binding poststo protect the movement from the large inrushcurrent at start This jumper is

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removed after the motor has started

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MODELACWM-1 GO WATIMETER PANEL

GENERAL The1iAMPDEN Model ACWMmiddotI00 consists artwo Iilulti-rangewattmeters and

I tbe~tchesh-lh~r operation Eacli has ~e follOwing ranges l

)to 1~30016~1200W

(150300Volts 2148 Amps)

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OPERATION Measure wattage bymiddotconn8cling a wattmetervoltmeter andmiddot~ete~8sshownin Figtt81 The ~-MPstttOn mustO be~middotconn~middotin series- with the ioad and-the

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VQTS con mUstmiddotbeqo~n~middotiJ1 prU9l1elwith the load protected against overloads by diodes

The Otlrrent~Coils are

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-FIGURE 1 WATTMETER CONNECnONS 14IJ -- -

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Each wa~eter has tWomiddot Voltage mtinp (150 and- 800V)~ Rotating the range -switclirounterciOCkwise from OFF engages the 150 volt range Rotatmg the _range SWitch clOQkwise from O~ engages the 800 volt range Utilize the Voltmeters readiDg to determine the approprlllte-range

Each wattmetermiddot has three currentmiddot ratings (2 4 and SA) Rotating the range swiJchfrom middotO~engages the Samprarigefbst ~ the wattm~termiddotreadsbelow ~r 8Cll18 and the ammeter indicates that the 4 amp rating will not be ~e9 ~ectmiddotthe 4 ainp range-middot If the mttnie~ again reads below balt scaie and the ammeterindicates that the 2 amp rating will no~ bemiddot exceeded the 2 amp range may bese1ectedI

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L FIGURE 2 WATTMETER CONNECTIONS 3fi1

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L middot The totalwatbge is the sum of the two meter readings PI and P2

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two ~eterS VlLL~PT be the same except at 1D1ity power factor middot -shy

When the power factor of the circuit is less than 509b the pointer of meter PI will reverse~ To obtain total wattage in this case reverse the current connections to metet Pl -then subtract the rea~g ormeter PI from that of meter P2

The twO-wattmeter~method cannot be used with as-phase 4-wire load Three wattmeters are ~ in that case

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POWER FACTOR i f ~

Given a balallCed load the~oWer tacentor middoteanbe -d~emiined from the two wattmeter mth6cL - ~

L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

J be calca1ated -from-the -following_equation0

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tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

wherep2 repr~ts th~~ier~thetwoWl1ttiJ1~ re~ingswhentbepower faeto~l~other thaD uPity

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BiDet th~powertaetb~ 8q1alsthcosme ofthephaseangletP~powerfactor may also be I deterJninedfromtheratioo~thetwo wittmeterreadings middotmiddotThegraph b~ow shows the1 I

I relationship between themiddotpowerfacior andth~ratio~f P1lP2 ~

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MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

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L OPERATIONI

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DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

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agt If the currePtis~ter than 5 amperes the needlewDI move off-scale TuRN OFF POVER IMliEDIATELY AJf exception to this may be on motor starling Momenshytary current inrushbullmay exceed 5 ampe~ but theneedleiminediately drops back to normal

b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

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1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

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a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

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MODEL-1723 rACHoME~R

DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

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MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

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OPEBATIONTouSe the powermiddotpanelt (lISt tum ON ~MAIN AC circuit breaker~i This will m~tethemain AC pnot Hght and 9nergize the four-pin ~Pyen~i supplying fix~208120VAOtliree-phase poWer Th~ other 1ixed~d~Je sulpHes may

l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

cuit ~~ (both ~ ~ncl BEc) A clockwise lOtation of the vol~cpntro1 -- ~ ~eause ~~~~the voltage a~ble at the appropriate 1~Ptashy

L I tNOTE ~~ ~~ltage oo~~lbob fOr the 0-208120V three-phase sUpply is ~ted at the ~nd or the

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IfanY~r~es11PplifSri-e~vefloaded one or more circuit breakers may trip middotOFF Al- ir ways turnthemiddotVariable suppllesto zero and remove the C8usaopound the oyerload before resetshy

JL ting the circuitmiddotl~~em

A pindiilg ~ groun4 oenn~oDis proVided at each end or the panel fOrgrounding the rotating macbin~

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Page 29: [1 Table D. - UTKweb.eecs.utk.edu/~jsl/ECE325/ECE325-LabManual.pdfLab #2 Load-Speed Characteristic of a DC Motor . Objective . The objective of . this . lab is to . detennine the load-speed

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MODEL MGmiddotBmiddot100DG BEDPLATE f

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The MG Bedplateconsists of a heayy s~ baBe n10~~middotmiddoton vibration pads The

I - GENERAL

function otthe bedplate is toe~le the quickmounting ~dcoup1mg of the two individ~ macbiDoes to form a completemiddotmiddotm~ior-Pnerator setpwothreaded hpldshy

~ down)1Ocks ~d winged screwsareprovidecltoseeurethe F t claJnps which hold tbeinBcbinetsmounting boards A couplingguard and two shaft ~gwrrds are p~

r vided to p~ttheSiudenttrom accidet1talJito~gor~~gwires0l1 rotatshy- shy ing)arts The guardsmiddotare quickly mounted bY insertirig retamer CUpS in~T~9tsin

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The procedure for mou~ting and ioupling the machines to the base is as fon~

L 1 A~just each wing screw 021- ~e two screw clamp hold~ownmiddot ~locks to the top of its threaded stud - 0

i 2 Place each ~chine so that the rear of the base is reSting agairistmiddotthemiddot thd rear clamp on thei L- MGbasemiddot

8 Slide machines iJiboara until ~elrcouplingl1anPs are centered oVer cen~ slots 4 bert rub coupnngmiddotsleevemiddot~toone of the mac1dnes co~pling 1IimgM~ L

5 Slidere~jning machines coupling flange into-the other side of couplbig sleeve 6 Checktobe Sure thatmiddot~e couplhig guard will cOver coupling when insertedmiddotinto one ot thel pails areenter slotsmiddot 7 plaCe front clamp tor each of machines against the front or the two macbiD5t bases

(- s 8 F~pr tighten ~~uts 9it middotthe two screw clamp hold-down biocks Lmiddot 9 Mount coUplini aDd shaft guards by locating appropriate retainer clips in slotS so that coushy

pling is ~der co~Ung guard and ~ sh~ is covered by a ~haft guatdL

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SERIES 100 -OPERATINGINSTRUCTIONS

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MODIL1-10oaA TRANSFClRfJIER OEMONSTRATOR

GENEijAL The TlOO-8A~~ts of three Single-phase bansformers wit~ m11Jtiple primary and secondary taps terminated atpinreceptacl~on the front of the unit Each of the three ~rOrinersmay beused independen1q Or the threemay~interconmiddot

f nected mseries~1npQmneJ or inmiddot many poJyph8seCbnfigurations

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EacbtraDslormer is~~middot af)vol~amperesat 60 Hertz ~ has two primary~d

two secoDdaqwindiIlBL Each ofthe priD1817 windiD~1tas800 turns of Nobull 24 gauge-wire and JSmiddotm~-120volta 05 amperes Onewhidingis tapped at 82 volts toprovide~~middotS~tttllp~(866$)middot~fthemiddot twomiddotwiDd1np~ 68ri~ Each or thesecondshylQ7middotwindh1pmiddot1uIs100t11rns of No 21 gauge wire and israted 60 volts 10 ampere One winding Js tappbd atmiddotlaquo volts to p~vide a Scott tapor the two windings in series Shownbelow are the voltage ratings orthe various taps for each of the three traDspoundormers

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t o 32V 120V 0 120V lI__

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t bull MODEL middotRLmiddot100AmiddotRESISTANC~LOAD J J- shy~ GENERAL The RL-IOOAfs variable ftsistance unit used to applya resistivel0a4middottogenera

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tors or altemators One unit may be used in single-phase applications ora bank L of tlmae units may be combhled intQ Wye or De1taCOnt1IJDlt1~DS tor three phase

applicmioDS TiieRL-lOOA mttoduces resistieload~ ~sequentild steps r designed to prod11CB approximateiy equal ipcremeJlts otJoadmiddot~tmiddot The SPST f ~ toigle switches are numbered andmiddot must be cloSed in nUD1erl~ordertodecrease

totlreslstance~creasmglOad The total ~cemiddot or the cOb~ected~rs ( may be COmputed f~theequation L

middot 1 1 1-1 ~=R1+Ri+lt8middotmiddotmiddot

The ConowingO equations may be used to detemUne the power disSipated from a measurement of load currentor voltage

L P=EI = = I~

p (ampp) = 8 xEpBPH (tor balanced ioad)

Where P=P~inWatb

E =yoltage inVolfB I = Currentin Amperes

f R =Resistance in Ohms L P(Stp) =middotmiddotTotalPower for Three-Phase

~H ==~ Voltage per Phase~r Load Bankf L bull IpH = Ourrent per Phase ofLoad Bank ampshy

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~ SERIES 100 OPmiddotERATmiddotING INSTRUCTIONS

MODEL RLC-100RESmiddotISTANCE-REACTANmiddotCE LOAD

The RLCl00 ismiddota variable resistance and--reactance- (either ~ductive or capaci- tive) uDit that ~y be used _to apply a singl~plmse or a three-phase load The remstive load (w~ can be ~ for both middotACcd DC) is controDed by siz SPST toggle switches e8ch of which puts 2000 ohlnaof resistance in paraDelmiddot lor all three phases simultaneouslybullThe resistive-load is therefore always balanced The total resistance in eacli ph8se equals 2000- ohms divided by the Dumber of switches closed For example with two sWitehesclosedtbe total resistance-is 1000 ohms rith aUsiZ closed 8888 ohms Each or the three reactance loads (used forAC o~) separateVfused at 1 amp is controlled by a knob that varltlSthe degreeopound lead andmiddot l8g A clockwise rotationof the middotknob applies leadiIlg pOwer factor (cashypaCitive)loid while a counterc1~ rotation appIiesa lagging power factor (inductive) load There is DO lpadapplied whenthe-knob is in mid position

The 8-4-5 right triangle graph below may bemiddot~ to approximate a O~8 power factor leading or lagging

1 Appfi a resistiVe load 2 Readthe in-phase current h from -the ammeter 8 From the lR value on tlie horizontal base of the graph travel vertically to the

point where it intersects the 08 PF (total amps) line 4 Frommiddotthis point travel horizontally to the reactive current wlueIz 5 Adjust the ~ve load until the Ix ammeter reads this value of reactive cur

rent

6 To obtain a ~ced load in a three-phaseconfigaratioD repeat Step -5 for the other two~

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DIAL POSITION CAPACITANCE (CLOCKWISE)

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2 316 J1F

3 501Jlf

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5 80~J1f

6 985 j1f 7 1160middotpF

8 1360J1Fmiddot

9 1609middotJ1F

10 18~JtF

11 2007~middotF

12 2170 fLF

13 2513 )iFmiddot

14 2860J1F

15 3090 pFmiddot

15 3269JlF

17 3539 JlFmiddot (

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MODJL ACVA-10()ACMETERINGPANEL L GENERAL The HAMPDEN Model ACVA-1OO consistsmiddotol two AC ammetem and one AC voltshy

meterA11 or the meters are dioaeprot8cted against overloads as high 1Ui 1000f

The ~ltmeter islicctt8 within 8 w1UIemiddotthe ammeters are accurate wi~hin ~ plusmn29D ormiddotfWl sCale dellection The middotme~rshave the following ranges

r I AC Voltm~teI Oto l00~OO V~ts ~ AC Amme~ OtlJQ5f2f4l8-Amps

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OPERATION

AC AMMETERS

L 1 Connect the ammeter in series so that the middotentire AC current to be measured passes

I through the ~~ter The test lead from the dark blue middotbindingpostis connected to one

side or the Dne and the test lead trom the Qrange bin~ post to the other ~ L

2 ~e choice or measuring range is iet with the range switch Fourmiddotranges are avaiiable O 05 0204 an~ 0 - 8 amperes

8 Set the rangemiddotswitch on the 8 ampere range Detore turning on the power

a) When ~ to measure motor current put a jumper lead between the tWo binding poststo protect the movement from the large inrushcurrent at start This jumper is

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removed after the motor has started

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MODELACWM-1 GO WATIMETER PANEL

GENERAL The1iAMPDEN Model ACWMmiddotI00 consists artwo Iilulti-rangewattmeters and

I tbe~tchesh-lh~r operation Eacli has ~e follOwing ranges l

)to 1~30016~1200W

(150300Volts 2148 Amps)

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OPERATION Measure wattage bymiddotconn8cling a wattmetervoltmeter andmiddot~ete~8sshownin Figtt81 The ~-MPstttOn mustO be~middotconn~middotin series- with the ioad and-the

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VQTS con mUstmiddotbeqo~n~middotiJ1 prU9l1elwith the load protected against overloads by diodes

The Otlrrent~Coils are

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-FIGURE 1 WATTMETER CONNECnONS 14IJ -- -

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Each wa~eter has tWomiddot Voltage mtinp (150 and- 800V)~ Rotating the range -switclirounterciOCkwise from OFF engages the 150 volt range Rotatmg the _range SWitch clOQkwise from O~ engages the 800 volt range Utilize the Voltmeters readiDg to determine the approprlllte-range

Each wattmetermiddot has three currentmiddot ratings (2 4 and SA) Rotating the range swiJchfrom middotO~engages the Samprarigefbst ~ the wattm~termiddotreadsbelow ~r 8Cll18 and the ammeter indicates that the 4 amp rating will not be ~e9 ~ectmiddotthe 4 ainp range-middot If the mttnie~ again reads below balt scaie and the ammeterindicates that the 2 amp rating will no~ bemiddot exceeded the 2 amp range may bese1ectedI

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L FIGURE 2 WATTMETER CONNECTIONS 3fi1

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L middot The totalwatbge is the sum of the two meter readings PI and P2

f When pow~ in a ~ced load is m~ured in this ~er the indication or the 1

two ~eterS VlLL~PT be the same except at 1D1ity power factor middot -shy

When the power factor of the circuit is less than 509b the pointer of meter PI will reverse~ To obtain total wattage in this case reverse the current connections to metet Pl -then subtract the rea~g ormeter PI from that of meter P2

The twO-wattmeter~method cannot be used with as-phase 4-wire load Three wattmeters are ~ in that case

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POWER FACTOR i f ~

Given a balallCed load the~oWer tacentor middoteanbe -d~emiined from the two wattmeter mth6cL - ~

L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

J be calca1ated -from-the -following_equation0

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tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

wherep2 repr~ts th~~ier~thetwoWl1ttiJ1~ re~ingswhentbepower faeto~l~other thaD uPity

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BiDet th~powertaetb~ 8q1alsthcosme ofthephaseangletP~powerfactor may also be I deterJninedfromtheratioo~thetwo wittmeterreadings middotmiddotThegraph b~ow shows the1 I

I relationship between themiddotpowerfacior andth~ratio~f P1lP2 ~

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MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

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L OPERATIONI

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DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

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agt If the currePtis~ter than 5 amperes the needlewDI move off-scale TuRN OFF POVER IMliEDIATELY AJf exception to this may be on motor starling Momenshytary current inrushbullmay exceed 5 ampe~ but theneedleiminediately drops back to normal

b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

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1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

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a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

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MODEL-1723 rACHoME~R

DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

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MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

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OPEBATIONTouSe the powermiddotpanelt (lISt tum ON ~MAIN AC circuit breaker~i This will m~tethemain AC pnot Hght and 9nergize the four-pin ~Pyen~i supplying fix~208120VAOtliree-phase poWer Th~ other 1ixed~d~Je sulpHes may

l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

cuit ~~ (both ~ ~ncl BEc) A clockwise lOtation of the vol~cpntro1 -- ~ ~eause ~~~~the voltage a~ble at the appropriate 1~Ptashy

L I tNOTE ~~ ~~ltage oo~~lbob fOr the 0-208120V three-phase sUpply is ~ted at the ~nd or the

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IfanY~r~es11PplifSri-e~vefloaded one or more circuit breakers may trip middotOFF Al- ir ways turnthemiddotVariable suppllesto zero and remove the C8usaopound the oyerload before resetshy

JL ting the circuitmiddotl~~em

A pindiilg ~ groun4 oenn~oDis proVided at each end or the panel fOrgrounding the rotating macbin~

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SERIES 100 -OPERATINGINSTRUCTIONS

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MODIL1-10oaA TRANSFClRfJIER OEMONSTRATOR

GENEijAL The TlOO-8A~~ts of three Single-phase bansformers wit~ m11Jtiple primary and secondary taps terminated atpinreceptacl~on the front of the unit Each of the three ~rOrinersmay beused independen1q Or the threemay~interconmiddot

f nected mseries~1npQmneJ or inmiddot many poJyph8seCbnfigurations

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EacbtraDslormer is~~middot af)vol~amperesat 60 Hertz ~ has two primary~d

two secoDdaqwindiIlBL Each ofthe priD1817 windiD~1tas800 turns of Nobull 24 gauge-wire and JSmiddotm~-120volta 05 amperes Onewhidingis tapped at 82 volts toprovide~~middotS~tttllp~(866$)middot~fthemiddot twomiddotwiDd1np~ 68ri~ Each or thesecondshylQ7middotwindh1pmiddot1uIs100t11rns of No 21 gauge wire and israted 60 volts 10 ampere One winding Js tappbd atmiddotlaquo volts to p~vide a Scott tapor the two windings in series Shownbelow are the voltage ratings orthe various taps for each of the three traDspoundormers

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t o 32V 120V 0 120V lI__

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t bull MODEL middotRLmiddot100AmiddotRESISTANC~LOAD J J- shy~ GENERAL The RL-IOOAfs variable ftsistance unit used to applya resistivel0a4middottogenera

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tors or altemators One unit may be used in single-phase applications ora bank L of tlmae units may be combhled intQ Wye or De1taCOnt1IJDlt1~DS tor three phase

applicmioDS TiieRL-lOOA mttoduces resistieload~ ~sequentild steps r designed to prod11CB approximateiy equal ipcremeJlts otJoadmiddot~tmiddot The SPST f ~ toigle switches are numbered andmiddot must be cloSed in nUD1erl~ordertodecrease

totlreslstance~creasmglOad The total ~cemiddot or the cOb~ected~rs ( may be COmputed f~theequation L

middot 1 1 1-1 ~=R1+Ri+lt8middotmiddotmiddot

The ConowingO equations may be used to detemUne the power disSipated from a measurement of load currentor voltage

L P=EI = = I~

p (ampp) = 8 xEpBPH (tor balanced ioad)

Where P=P~inWatb

E =yoltage inVolfB I = Currentin Amperes

f R =Resistance in Ohms L P(Stp) =middotmiddotTotalPower for Three-Phase

~H ==~ Voltage per Phase~r Load Bankf L bull IpH = Ourrent per Phase ofLoad Bank ampshy

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~ SERIES 100 OPmiddotERATmiddotING INSTRUCTIONS

MODEL RLC-100RESmiddotISTANCE-REACTANmiddotCE LOAD

The RLCl00 ismiddota variable resistance and--reactance- (either ~ductive or capaci- tive) uDit that ~y be used _to apply a singl~plmse or a three-phase load The remstive load (w~ can be ~ for both middotACcd DC) is controDed by siz SPST toggle switches e8ch of which puts 2000 ohlnaof resistance in paraDelmiddot lor all three phases simultaneouslybullThe resistive-load is therefore always balanced The total resistance in eacli ph8se equals 2000- ohms divided by the Dumber of switches closed For example with two sWitehesclosedtbe total resistance-is 1000 ohms rith aUsiZ closed 8888 ohms Each or the three reactance loads (used forAC o~) separateVfused at 1 amp is controlled by a knob that varltlSthe degreeopound lead andmiddot l8g A clockwise rotationof the middotknob applies leadiIlg pOwer factor (cashypaCitive)loid while a counterc1~ rotation appIiesa lagging power factor (inductive) load There is DO lpadapplied whenthe-knob is in mid position

The 8-4-5 right triangle graph below may bemiddot~ to approximate a O~8 power factor leading or lagging

1 Appfi a resistiVe load 2 Readthe in-phase current h from -the ammeter 8 From the lR value on tlie horizontal base of the graph travel vertically to the

point where it intersects the 08 PF (total amps) line 4 Frommiddotthis point travel horizontally to the reactive current wlueIz 5 Adjust the ~ve load until the Ix ammeter reads this value of reactive cur

rent

6 To obtain a ~ced load in a three-phaseconfigaratioD repeat Step -5 for the other two~

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-13 47 Henry

middotINDUCTANCEDIAL POSITIONmiddot (~middotQLJNT~RCmiddotLOCKWJSE)

-12 51 Henry

middot11 ~ 57 Henry

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DIAL POSITION CAPACITANCE (CLOCKWISE)

0 69 llF

1 1~57 J1F

2 316 J1F

3 501Jlf

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5 80~J1f

6 985 j1f 7 1160middotpF

8 1360J1Fmiddot

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10 18~JtF

11 2007~middotF

12 2170 fLF

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SERIES 100OPERATING INSTAUCTIONS L

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MODJL ACVA-10()ACMETERINGPANEL L GENERAL The HAMPDEN Model ACVA-1OO consistsmiddotol two AC ammetem and one AC voltshy

meterA11 or the meters are dioaeprot8cted against overloads as high 1Ui 1000f

The ~ltmeter islicctt8 within 8 w1UIemiddotthe ammeters are accurate wi~hin ~ plusmn29D ormiddotfWl sCale dellection The middotme~rshave the following ranges

r I AC Voltm~teI Oto l00~OO V~ts ~ AC Amme~ OtlJQ5f2f4l8-Amps

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OPERATION

AC AMMETERS

L 1 Connect the ammeter in series so that the middotentire AC current to be measured passes

I through the ~~ter The test lead from the dark blue middotbindingpostis connected to one

side or the Dne and the test lead trom the Qrange bin~ post to the other ~ L

2 ~e choice or measuring range is iet with the range switch Fourmiddotranges are avaiiable O 05 0204 an~ 0 - 8 amperes

8 Set the rangemiddotswitch on the 8 ampere range Detore turning on the power

a) When ~ to measure motor current put a jumper lead between the tWo binding poststo protect the movement from the large inrushcurrent at start This jumper is

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removed after the motor has started

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MODELACWM-1 GO WATIMETER PANEL

GENERAL The1iAMPDEN Model ACWMmiddotI00 consists artwo Iilulti-rangewattmeters and

I tbe~tchesh-lh~r operation Eacli has ~e follOwing ranges l

)to 1~30016~1200W

(150300Volts 2148 Amps)

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OPERATION Measure wattage bymiddotconn8cling a wattmetervoltmeter andmiddot~ete~8sshownin Figtt81 The ~-MPstttOn mustO be~middotconn~middotin series- with the ioad and-the

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VQTS con mUstmiddotbeqo~n~middotiJ1 prU9l1elwith the load protected against overloads by diodes

The Otlrrent~Coils are

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Each wa~eter has tWomiddot Voltage mtinp (150 and- 800V)~ Rotating the range -switclirounterciOCkwise from OFF engages the 150 volt range Rotatmg the _range SWitch clOQkwise from O~ engages the 800 volt range Utilize the Voltmeters readiDg to determine the approprlllte-range

Each wattmetermiddot has three currentmiddot ratings (2 4 and SA) Rotating the range swiJchfrom middotO~engages the Samprarigefbst ~ the wattm~termiddotreadsbelow ~r 8Cll18 and the ammeter indicates that the 4 amp rating will not be ~e9 ~ectmiddotthe 4 ainp range-middot If the mttnie~ again reads below balt scaie and the ammeterindicates that the 2 amp rating will no~ bemiddot exceeded the 2 amp range may bese1ectedI

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L FIGURE 2 WATTMETER CONNECTIONS 3fi1

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L middot The totalwatbge is the sum of the two meter readings PI and P2

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two ~eterS VlLL~PT be the same except at 1D1ity power factor middot -shy

When the power factor of the circuit is less than 509b the pointer of meter PI will reverse~ To obtain total wattage in this case reverse the current connections to metet Pl -then subtract the rea~g ormeter PI from that of meter P2

The twO-wattmeter~method cannot be used with as-phase 4-wire load Three wattmeters are ~ in that case

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POWER FACTOR i f ~

Given a balallCed load the~oWer tacentor middoteanbe -d~emiined from the two wattmeter mth6cL - ~

L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

J be calca1ated -from-the -following_equation0

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tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

wherep2 repr~ts th~~ier~thetwoWl1ttiJ1~ re~ingswhentbepower faeto~l~other thaD uPity

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BiDet th~powertaetb~ 8q1alsthcosme ofthephaseangletP~powerfactor may also be I deterJninedfromtheratioo~thetwo wittmeterreadings middotmiddotThegraph b~ow shows the1 I

I relationship between themiddotpowerfacior andth~ratio~f P1lP2 ~

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MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

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DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

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agt If the currePtis~ter than 5 amperes the needlewDI move off-scale TuRN OFF POVER IMliEDIATELY AJf exception to this may be on motor starling Momenshytary current inrushbullmay exceed 5 ampe~ but theneedleiminediately drops back to normal

b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

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1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

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a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

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MODEL-1723 rACHoME~R

DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

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MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

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OPEBATIONTouSe the powermiddotpanelt (lISt tum ON ~MAIN AC circuit breaker~i This will m~tethemain AC pnot Hght and 9nergize the four-pin ~Pyen~i supplying fix~208120VAOtliree-phase poWer Th~ other 1ixed~d~Je sulpHes may

l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

cuit ~~ (both ~ ~ncl BEc) A clockwise lOtation of the vol~cpntro1 -- ~ ~eause ~~~~the voltage a~ble at the appropriate 1~Ptashy

L I tNOTE ~~ ~~ltage oo~~lbob fOr the 0-208120V three-phase sUpply is ~ted at the ~nd or the

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IfanY~r~es11PplifSri-e~vefloaded one or more circuit breakers may trip middotOFF Al- ir ways turnthemiddotVariable suppllesto zero and remove the C8usaopound the oyerload before resetshy

JL ting the circuitmiddotl~~em

A pindiilg ~ groun4 oenn~oDis proVided at each end or the panel fOrgrounding the rotating macbin~

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MODIL1-10oaA TRANSFClRfJIER OEMONSTRATOR

GENEijAL The TlOO-8A~~ts of three Single-phase bansformers wit~ m11Jtiple primary and secondary taps terminated atpinreceptacl~on the front of the unit Each of the three ~rOrinersmay beused independen1q Or the threemay~interconmiddot

f nected mseries~1npQmneJ or inmiddot many poJyph8seCbnfigurations

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EacbtraDslormer is~~middot af)vol~amperesat 60 Hertz ~ has two primary~d

two secoDdaqwindiIlBL Each ofthe priD1817 windiD~1tas800 turns of Nobull 24 gauge-wire and JSmiddotm~-120volta 05 amperes Onewhidingis tapped at 82 volts toprovide~~middotS~tttllp~(866$)middot~fthemiddot twomiddotwiDd1np~ 68ri~ Each or thesecondshylQ7middotwindh1pmiddot1uIs100t11rns of No 21 gauge wire and israted 60 volts 10 ampere One winding Js tappbd atmiddotlaquo volts to p~vide a Scott tapor the two windings in series Shownbelow are the voltage ratings orthe various taps for each of the three traDspoundormers

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t o 32V 120V 0 120V lI__

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t bull MODEL middotRLmiddot100AmiddotRESISTANC~LOAD J J- shy~ GENERAL The RL-IOOAfs variable ftsistance unit used to applya resistivel0a4middottogenera

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tors or altemators One unit may be used in single-phase applications ora bank L of tlmae units may be combhled intQ Wye or De1taCOnt1IJDlt1~DS tor three phase

applicmioDS TiieRL-lOOA mttoduces resistieload~ ~sequentild steps r designed to prod11CB approximateiy equal ipcremeJlts otJoadmiddot~tmiddot The SPST f ~ toigle switches are numbered andmiddot must be cloSed in nUD1erl~ordertodecrease

totlreslstance~creasmglOad The total ~cemiddot or the cOb~ected~rs ( may be COmputed f~theequation L

middot 1 1 1-1 ~=R1+Ri+lt8middotmiddotmiddot

The ConowingO equations may be used to detemUne the power disSipated from a measurement of load currentor voltage

L P=EI = = I~

p (ampp) = 8 xEpBPH (tor balanced ioad)

Where P=P~inWatb

E =yoltage inVolfB I = Currentin Amperes

f R =Resistance in Ohms L P(Stp) =middotmiddotTotalPower for Three-Phase

~H ==~ Voltage per Phase~r Load Bankf L bull IpH = Ourrent per Phase ofLoad Bank ampshy

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~ SERIES 100 OPmiddotERATmiddotING INSTRUCTIONS

MODEL RLC-100RESmiddotISTANCE-REACTANmiddotCE LOAD

The RLCl00 ismiddota variable resistance and--reactance- (either ~ductive or capaci- tive) uDit that ~y be used _to apply a singl~plmse or a three-phase load The remstive load (w~ can be ~ for both middotACcd DC) is controDed by siz SPST toggle switches e8ch of which puts 2000 ohlnaof resistance in paraDelmiddot lor all three phases simultaneouslybullThe resistive-load is therefore always balanced The total resistance in eacli ph8se equals 2000- ohms divided by the Dumber of switches closed For example with two sWitehesclosedtbe total resistance-is 1000 ohms rith aUsiZ closed 8888 ohms Each or the three reactance loads (used forAC o~) separateVfused at 1 amp is controlled by a knob that varltlSthe degreeopound lead andmiddot l8g A clockwise rotationof the middotknob applies leadiIlg pOwer factor (cashypaCitive)loid while a counterc1~ rotation appIiesa lagging power factor (inductive) load There is DO lpadapplied whenthe-knob is in mid position

The 8-4-5 right triangle graph below may bemiddot~ to approximate a O~8 power factor leading or lagging

1 Appfi a resistiVe load 2 Readthe in-phase current h from -the ammeter 8 From the lR value on tlie horizontal base of the graph travel vertically to the

point where it intersects the 08 PF (total amps) line 4 Frommiddotthis point travel horizontally to the reactive current wlueIz 5 Adjust the ~ve load until the Ix ammeter reads this value of reactive cur

rent

6 To obtain a ~ced load in a three-phaseconfigaratioD repeat Step -5 for the other two~

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middotINDUCTANCEDIAL POSITIONmiddot (~middotQLJNT~RCmiddotLOCKWJSE)

-12 51 Henry

middot11 ~ 57 Henry

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-15 ~41middotmiddotHQIllY

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-16 37 Henry~

-7 97 HefJry

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DIAL POSITION CAPACITANCE (CLOCKWISE)

0 69 llF

1 1~57 J1F

2 316 J1F

3 501Jlf

middot4 640J1F

5 80~J1f

6 985 j1f 7 1160middotpF

8 1360J1Fmiddot

9 1609middotJ1F

10 18~JtF

11 2007~middotF

12 2170 fLF

13 2513 )iFmiddot

14 2860J1F

15 3090 pFmiddot

15 3269JlF

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SERIES 100OPERATING INSTAUCTIONS L

- -

-

MODJL ACVA-10()ACMETERINGPANEL L GENERAL The HAMPDEN Model ACVA-1OO consistsmiddotol two AC ammetem and one AC voltshy

meterA11 or the meters are dioaeprot8cted against overloads as high 1Ui 1000f

The ~ltmeter islicctt8 within 8 w1UIemiddotthe ammeters are accurate wi~hin ~ plusmn29D ormiddotfWl sCale dellection The middotme~rshave the following ranges

r I AC Voltm~teI Oto l00~OO V~ts ~ AC Amme~ OtlJQ5f2f4l8-Amps

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OPERATION

AC AMMETERS

L 1 Connect the ammeter in series so that the middotentire AC current to be measured passes

I through the ~~ter The test lead from the dark blue middotbindingpostis connected to one

side or the Dne and the test lead trom the Qrange bin~ post to the other ~ L

2 ~e choice or measuring range is iet with the range switch Fourmiddotranges are avaiiable O 05 0204 an~ 0 - 8 amperes

8 Set the rangemiddotswitch on the 8 ampere range Detore turning on the power

a) When ~ to measure motor current put a jumper lead between the tWo binding poststo protect the movement from the large inrushcurrent at start This jumper is

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removed after the motor has started

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MODELACWM-1 GO WATIMETER PANEL

GENERAL The1iAMPDEN Model ACWMmiddotI00 consists artwo Iilulti-rangewattmeters and

I tbe~tchesh-lh~r operation Eacli has ~e follOwing ranges l

)to 1~30016~1200W

(150300Volts 2148 Amps)

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OPERATION Measure wattage bymiddotconn8cling a wattmetervoltmeter andmiddot~ete~8sshownin Figtt81 The ~-MPstttOn mustO be~middotconn~middotin series- with the ioad and-the

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VQTS con mUstmiddotbeqo~n~middotiJ1 prU9l1elwith the load protected against overloads by diodes

The Otlrrent~Coils are

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Each wa~eter has tWomiddot Voltage mtinp (150 and- 800V)~ Rotating the range -switclirounterciOCkwise from OFF engages the 150 volt range Rotatmg the _range SWitch clOQkwise from O~ engages the 800 volt range Utilize the Voltmeters readiDg to determine the approprlllte-range

Each wattmetermiddot has three currentmiddot ratings (2 4 and SA) Rotating the range swiJchfrom middotO~engages the Samprarigefbst ~ the wattm~termiddotreadsbelow ~r 8Cll18 and the ammeter indicates that the 4 amp rating will not be ~e9 ~ectmiddotthe 4 ainp range-middot If the mttnie~ again reads below balt scaie and the ammeterindicates that the 2 amp rating will no~ bemiddot exceeded the 2 amp range may bese1ectedI

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L FIGURE 2 WATTMETER CONNECTIONS 3fi1

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L middot The totalwatbge is the sum of the two meter readings PI and P2

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two ~eterS VlLL~PT be the same except at 1D1ity power factor middot -shy

When the power factor of the circuit is less than 509b the pointer of meter PI will reverse~ To obtain total wattage in this case reverse the current connections to metet Pl -then subtract the rea~g ormeter PI from that of meter P2

The twO-wattmeter~method cannot be used with as-phase 4-wire load Three wattmeters are ~ in that case

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POWER FACTOR i f ~

Given a balallCed load the~oWer tacentor middoteanbe -d~emiined from the two wattmeter mth6cL - ~

L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

J be calca1ated -from-the -following_equation0

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tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

wherep2 repr~ts th~~ier~thetwoWl1ttiJ1~ re~ingswhentbepower faeto~l~other thaD uPity

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BiDet th~powertaetb~ 8q1alsthcosme ofthephaseangletP~powerfactor may also be I deterJninedfromtheratioo~thetwo wittmeterreadings middotmiddotThegraph b~ow shows the1 I

I relationship between themiddotpowerfacior andth~ratio~f P1lP2 ~

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MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

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DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

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agt If the currePtis~ter than 5 amperes the needlewDI move off-scale TuRN OFF POVER IMliEDIATELY AJf exception to this may be on motor starling Momenshytary current inrushbullmay exceed 5 ampe~ but theneedleiminediately drops back to normal

b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

L

1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

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a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

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MODEL-1723 rACHoME~R

DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

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MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

L bull Fieci120VAC 15A~u~tWod~plex receptacles bull ~12OVAC single-pJiase2-~lOA bull FiX~208120VAC~phase 4-wire15A bull VariabJe 0 ~ 24oI14QVAC8-~i~~9A

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OPEBATIONTouSe the powermiddotpanelt (lISt tum ON ~MAIN AC circuit breaker~i This will m~tethemain AC pnot Hght and 9nergize the four-pin ~Pyen~i supplying fix~208120VAOtliree-phase poWer Th~ other 1ixed~d~Je sulpHes may

l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

cuit ~~ (both ~ ~ncl BEc) A clockwise lOtation of the vol~cpntro1 -- ~ ~eause ~~~~the voltage a~ble at the appropriate 1~Ptashy

L I tNOTE ~~ ~~ltage oo~~lbob fOr the 0-208120V three-phase sUpply is ~ted at the ~nd or the

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IfanY~r~es11PplifSri-e~vefloaded one or more circuit breakers may trip middotOFF Al- ir ways turnthemiddotVariable suppllesto zero and remove the C8usaopound the oyerload before resetshy

JL ting the circuitmiddotl~~em

A pindiilg ~ groun4 oenn~oDis proVided at each end or the panel fOrgrounding the rotating macbin~

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middotSEmiddotRIES 100OPERATING INSTRUCTIONS

t bull MODEL middotRLmiddot100AmiddotRESISTANC~LOAD J J- shy~ GENERAL The RL-IOOAfs variable ftsistance unit used to applya resistivel0a4middottogenera

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tors or altemators One unit may be used in single-phase applications ora bank L of tlmae units may be combhled intQ Wye or De1taCOnt1IJDlt1~DS tor three phase

applicmioDS TiieRL-lOOA mttoduces resistieload~ ~sequentild steps r designed to prod11CB approximateiy equal ipcremeJlts otJoadmiddot~tmiddot The SPST f ~ toigle switches are numbered andmiddot must be cloSed in nUD1erl~ordertodecrease

totlreslstance~creasmglOad The total ~cemiddot or the cOb~ected~rs ( may be COmputed f~theequation L

middot 1 1 1-1 ~=R1+Ri+lt8middotmiddotmiddot

The ConowingO equations may be used to detemUne the power disSipated from a measurement of load currentor voltage

L P=EI = = I~

p (ampp) = 8 xEpBPH (tor balanced ioad)

Where P=P~inWatb

E =yoltage inVolfB I = Currentin Amperes

f R =Resistance in Ohms L P(Stp) =middotmiddotTotalPower for Three-Phase

~H ==~ Voltage per Phase~r Load Bankf L bull IpH = Ourrent per Phase ofLoad Bank ampshy

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FROM AC OR DC SOURCE

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~ SERIES 100 OPmiddotERATmiddotING INSTRUCTIONS

MODEL RLC-100RESmiddotISTANCE-REACTANmiddotCE LOAD

The RLCl00 ismiddota variable resistance and--reactance- (either ~ductive or capaci- tive) uDit that ~y be used _to apply a singl~plmse or a three-phase load The remstive load (w~ can be ~ for both middotACcd DC) is controDed by siz SPST toggle switches e8ch of which puts 2000 ohlnaof resistance in paraDelmiddot lor all three phases simultaneouslybullThe resistive-load is therefore always balanced The total resistance in eacli ph8se equals 2000- ohms divided by the Dumber of switches closed For example with two sWitehesclosedtbe total resistance-is 1000 ohms rith aUsiZ closed 8888 ohms Each or the three reactance loads (used forAC o~) separateVfused at 1 amp is controlled by a knob that varltlSthe degreeopound lead andmiddot l8g A clockwise rotationof the middotknob applies leadiIlg pOwer factor (cashypaCitive)loid while a counterc1~ rotation appIiesa lagging power factor (inductive) load There is DO lpadapplied whenthe-knob is in mid position

The 8-4-5 right triangle graph below may bemiddot~ to approximate a O~8 power factor leading or lagging

1 Appfi a resistiVe load 2 Readthe in-phase current h from -the ammeter 8 From the lR value on tlie horizontal base of the graph travel vertically to the

point where it intersects the 08 PF (total amps) line 4 Frommiddotthis point travel horizontally to the reactive current wlueIz 5 Adjust the ~ve load until the Ix ammeter reads this value of reactive cur

rent

6 To obtain a ~ced load in a three-phaseconfigaratioD repeat Step -5 for the other two~

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-13 47 Henry

middotINDUCTANCEDIAL POSITIONmiddot (~middotQLJNT~RCmiddotLOCKWJSE)

-12 51 Henry

middot11 ~ 57 Henry

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-7 97 HefJry

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DIAL POSITION CAPACITANCE (CLOCKWISE)

0 69 llF

1 1~57 J1F

2 316 J1F

3 501Jlf

middot4 640J1F

5 80~J1f

6 985 j1f 7 1160middotpF

8 1360J1Fmiddot

9 1609middotJ1F

10 18~JtF

11 2007~middotF

12 2170 fLF

13 2513 )iFmiddot

14 2860J1F

15 3090 pFmiddot

15 3269JlF

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SERIES 100OPERATING INSTAUCTIONS L

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MODJL ACVA-10()ACMETERINGPANEL L GENERAL The HAMPDEN Model ACVA-1OO consistsmiddotol two AC ammetem and one AC voltshy

meterA11 or the meters are dioaeprot8cted against overloads as high 1Ui 1000f

The ~ltmeter islicctt8 within 8 w1UIemiddotthe ammeters are accurate wi~hin ~ plusmn29D ormiddotfWl sCale dellection The middotme~rshave the following ranges

r I AC Voltm~teI Oto l00~OO V~ts ~ AC Amme~ OtlJQ5f2f4l8-Amps

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OPERATION

AC AMMETERS

L 1 Connect the ammeter in series so that the middotentire AC current to be measured passes

I through the ~~ter The test lead from the dark blue middotbindingpostis connected to one

side or the Dne and the test lead trom the Qrange bin~ post to the other ~ L

2 ~e choice or measuring range is iet with the range switch Fourmiddotranges are avaiiable O 05 0204 an~ 0 - 8 amperes

8 Set the rangemiddotswitch on the 8 ampere range Detore turning on the power

a) When ~ to measure motor current put a jumper lead between the tWo binding poststo protect the movement from the large inrushcurrent at start This jumper is

(

removed after the motor has started

--~---~--~_--------~---_~_----ENGINEERfNG CORPORATION

MANUFACTURERSmiddotOF rpUIPMCNT F()R EDUCATION AND INDUSTRY

L POmiddotBoxS63 East Longmeadow MA 01028middot (413) 525-3981 bull TLX 9gt5426 bull Pax (413) S2S-474i

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MODELACWM-1 GO WATIMETER PANEL

GENERAL The1iAMPDEN Model ACWMmiddotI00 consists artwo Iilulti-rangewattmeters and

I tbe~tchesh-lh~r operation Eacli has ~e follOwing ranges l

)to 1~30016~1200W

(150300Volts 2148 Amps)

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OPERATION Measure wattage bymiddotconn8cling a wattmetervoltmeter andmiddot~ete~8sshownin Figtt81 The ~-MPstttOn mustO be~middotconn~middotin series- with the ioad and-the

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VQTS con mUstmiddotbeqo~n~middotiJ1 prU9l1elwith the load protected against overloads by diodes

The Otlrrent~Coils are

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-FIGURE 1 WATTMETER CONNECnONS 14IJ -- -

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Each wa~eter has tWomiddot Voltage mtinp (150 and- 800V)~ Rotating the range -switclirounterciOCkwise from OFF engages the 150 volt range Rotatmg the _range SWitch clOQkwise from O~ engages the 800 volt range Utilize the Voltmeters readiDg to determine the approprlllte-range

Each wattmetermiddot has three currentmiddot ratings (2 4 and SA) Rotating the range swiJchfrom middotO~engages the Samprarigefbst ~ the wattm~termiddotreadsbelow ~r 8Cll18 and the ammeter indicates that the 4 amp rating will not be ~e9 ~ectmiddotthe 4 ainp range-middot If the mttnie~ again reads below balt scaie and the ammeterindicates that the 2 amp rating will no~ bemiddot exceeded the 2 amp range may bese1ectedI

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L FIGURE 2 WATTMETER CONNECTIONS 3fi1

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L middot The totalwatbge is the sum of the two meter readings PI and P2

f When pow~ in a ~ced load is m~ured in this ~er the indication or the 1

two ~eterS VlLL~PT be the same except at 1D1ity power factor middot -shy

When the power factor of the circuit is less than 509b the pointer of meter PI will reverse~ To obtain total wattage in this case reverse the current connections to metet Pl -then subtract the rea~g ormeter PI from that of meter P2

The twO-wattmeter~method cannot be used with as-phase 4-wire load Three wattmeters are ~ in that case

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POWER FACTOR i f ~

Given a balallCed load the~oWer tacentor middoteanbe -d~emiined from the two wattmeter mth6cL - ~

L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

J be calca1ated -from-the -following_equation0

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tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

wherep2 repr~ts th~~ier~thetwoWl1ttiJ1~ re~ingswhentbepower faeto~l~other thaD uPity

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BiDet th~powertaetb~ 8q1alsthcosme ofthephaseangletP~powerfactor may also be I deterJninedfromtheratioo~thetwo wittmeterreadings middotmiddotThegraph b~ow shows the1 I

I relationship between themiddotpowerfacior andth~ratio~f P1lP2 ~

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MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

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DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

L shy6IfIamp_0 middotEN G I NmiddotEmiddotEmiddotR ING COR PO RmiddotATi ()N

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b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

L

1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

L

a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

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DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

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MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

L bull Fieci120VAC 15A~u~tWod~plex receptacles bull ~12OVAC single-pJiase2-~lOA bull FiX~208120VAC~phase 4-wire15A bull VariabJe 0 ~ 24oI14QVAC8-~i~~9A

f bull -Vari8bleO ~ 150vnQ-i~(lA isolated l~RMS L bull Variable 0 ~ 125VDCt 5Q -isolated ItlmiddotRMS middot

OPEBATIONTouSe the powermiddotpanelt (lISt tum ON ~MAIN AC circuit breaker~i This will m~tethemain AC pnot Hght and 9nergize the four-pin ~Pyen~i supplying fix~208120VAOtliree-phase poWer Th~ other 1ixed~d~Je sulpHes may

l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

cuit ~~ (both ~ ~ncl BEc) A clockwise lOtation of the vol~cpntro1 -- ~ ~eause ~~~~the voltage a~ble at the appropriate 1~Ptashy

L I tNOTE ~~ ~~ltage oo~~lbob fOr the 0-208120V three-phase sUpply is ~ted at the ~nd or the

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IfanY~r~es11PplifSri-e~vefloaded one or more circuit breakers may trip middotOFF Al- ir ways turnthemiddotVariable suppllesto zero and remove the C8usaopound the oyerload before resetshy

JL ting the circuitmiddotl~~em

A pindiilg ~ groun4 oenn~oDis proVided at each end or the panel fOrgrounding the rotating macbin~

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Page 33: [1 Table D. - UTKweb.eecs.utk.edu/~jsl/ECE325/ECE325-LabManual.pdfLab #2 Load-Speed Characteristic of a DC Motor . Objective . The objective of . this . lab is to . detennine the load-speed

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~ SERIES 100 OPmiddotERATmiddotING INSTRUCTIONS

MODEL RLC-100RESmiddotISTANCE-REACTANmiddotCE LOAD

The RLCl00 ismiddota variable resistance and--reactance- (either ~ductive or capaci- tive) uDit that ~y be used _to apply a singl~plmse or a three-phase load The remstive load (w~ can be ~ for both middotACcd DC) is controDed by siz SPST toggle switches e8ch of which puts 2000 ohlnaof resistance in paraDelmiddot lor all three phases simultaneouslybullThe resistive-load is therefore always balanced The total resistance in eacli ph8se equals 2000- ohms divided by the Dumber of switches closed For example with two sWitehesclosedtbe total resistance-is 1000 ohms rith aUsiZ closed 8888 ohms Each or the three reactance loads (used forAC o~) separateVfused at 1 amp is controlled by a knob that varltlSthe degreeopound lead andmiddot l8g A clockwise rotationof the middotknob applies leadiIlg pOwer factor (cashypaCitive)loid while a counterc1~ rotation appIiesa lagging power factor (inductive) load There is DO lpadapplied whenthe-knob is in mid position

The 8-4-5 right triangle graph below may bemiddot~ to approximate a O~8 power factor leading or lagging

1 Appfi a resistiVe load 2 Readthe in-phase current h from -the ammeter 8 From the lR value on tlie horizontal base of the graph travel vertically to the

point where it intersects the 08 PF (total amps) line 4 Frommiddotthis point travel horizontally to the reactive current wlueIz 5 Adjust the ~ve load until the Ix ammeter reads this value of reactive cur

rent

6 To obtain a ~ced load in a three-phaseconfigaratioD repeat Step -5 for the other two~

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-17 35 Henry

-13 47 Henry

middotINDUCTANCEDIAL POSITIONmiddot (~middotQLJNT~RCmiddotLOCKWJSE)

-12 51 Henry

middot11 ~ 57 Henry

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-15 ~41middotmiddotHQIllY

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-16 37 Henry~

-7 97 HefJry

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DIAL POSITION CAPACITANCE (CLOCKWISE)

0 69 llF

1 1~57 J1F

2 316 J1F

3 501Jlf

middot4 640J1F

5 80~J1f

6 985 j1f 7 1160middotpF

8 1360J1Fmiddot

9 1609middotJ1F

10 18~JtF

11 2007~middotF

12 2170 fLF

13 2513 )iFmiddot

14 2860J1F

15 3090 pFmiddot

15 3269JlF

17 3539 JlFmiddot (

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SERIES 100OPERATING INSTAUCTIONS L

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-

MODJL ACVA-10()ACMETERINGPANEL L GENERAL The HAMPDEN Model ACVA-1OO consistsmiddotol two AC ammetem and one AC voltshy

meterA11 or the meters are dioaeprot8cted against overloads as high 1Ui 1000f

The ~ltmeter islicctt8 within 8 w1UIemiddotthe ammeters are accurate wi~hin ~ plusmn29D ormiddotfWl sCale dellection The middotme~rshave the following ranges

r I AC Voltm~teI Oto l00~OO V~ts ~ AC Amme~ OtlJQ5f2f4l8-Amps

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OPERATION

AC AMMETERS

L 1 Connect the ammeter in series so that the middotentire AC current to be measured passes

I through the ~~ter The test lead from the dark blue middotbindingpostis connected to one

side or the Dne and the test lead trom the Qrange bin~ post to the other ~ L

2 ~e choice or measuring range is iet with the range switch Fourmiddotranges are avaiiable O 05 0204 an~ 0 - 8 amperes

8 Set the rangemiddotswitch on the 8 ampere range Detore turning on the power

a) When ~ to measure motor current put a jumper lead between the tWo binding poststo protect the movement from the large inrushcurrent at start This jumper is

(

removed after the motor has started

--~---~--~_--------~---_~_----ENGINEERfNG CORPORATION

MANUFACTURERSmiddotOF rpUIPMCNT F()R EDUCATION AND INDUSTRY

L POmiddotBoxS63 East Longmeadow MA 01028middot (413) 525-3981 bull TLX 9gt5426 bull Pax (413) S2S-474i

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MODELACWM-1 GO WATIMETER PANEL

GENERAL The1iAMPDEN Model ACWMmiddotI00 consists artwo Iilulti-rangewattmeters and

I tbe~tchesh-lh~r operation Eacli has ~e follOwing ranges l

)to 1~30016~1200W

(150300Volts 2148 Amps)

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OPERATION Measure wattage bymiddotconn8cling a wattmetervoltmeter andmiddot~ete~8sshownin Figtt81 The ~-MPstttOn mustO be~middotconn~middotin series- with the ioad and-the

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VQTS con mUstmiddotbeqo~n~middotiJ1 prU9l1elwith the load protected against overloads by diodes

The Otlrrent~Coils are

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-FIGURE 1 WATTMETER CONNECnONS 14IJ -- -

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Each wa~eter has tWomiddot Voltage mtinp (150 and- 800V)~ Rotating the range -switclirounterciOCkwise from OFF engages the 150 volt range Rotatmg the _range SWitch clOQkwise from O~ engages the 800 volt range Utilize the Voltmeters readiDg to determine the approprlllte-range

Each wattmetermiddot has three currentmiddot ratings (2 4 and SA) Rotating the range swiJchfrom middotO~engages the Samprarigefbst ~ the wattm~termiddotreadsbelow ~r 8Cll18 and the ammeter indicates that the 4 amp rating will not be ~e9 ~ectmiddotthe 4 ainp range-middot If the mttnie~ again reads below balt scaie and the ammeterindicates that the 2 amp rating will no~ bemiddot exceeded the 2 amp range may bese1ectedI

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L FIGURE 2 WATTMETER CONNECTIONS 3fi1

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L middot The totalwatbge is the sum of the two meter readings PI and P2

f When pow~ in a ~ced load is m~ured in this ~er the indication or the 1

two ~eterS VlLL~PT be the same except at 1D1ity power factor middot -shy

When the power factor of the circuit is less than 509b the pointer of meter PI will reverse~ To obtain total wattage in this case reverse the current connections to metet Pl -then subtract the rea~g ormeter PI from that of meter P2

The twO-wattmeter~method cannot be used with as-phase 4-wire load Three wattmeters are ~ in that case

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L eNGINEERING CmiddotORPORATION -----w-NUFACTUREAS OF EQUIPMeNT fOR eDUcATIOH NCO INOUSTAY

L Po Box 563 EastLcmgm~~owMi 01028 (413) 525middot3981 bull~middot9S-S42~ bull Pax (413)525-4741

F-4 Cont I L

POWER FACTOR i f ~

Given a balallCed load the~oWer tacentor middoteanbe -d~emiined from the two wattmeter mth6cL - ~

L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

J be calca1ated -from-the -following_equation0

J ~

tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

wherep2 repr~ts th~~ier~thetwoWl1ttiJ1~ re~ingswhentbepower faeto~l~other thaD uPity

f L

BiDet th~powertaetb~ 8q1alsthcosme ofthephaseangletP~powerfactor may also be I deterJninedfromtheratioo~thetwo wittmeterreadings middotmiddotThegraph b~ow shows the1 I

I relationship between themiddotpowerfacior andth~ratio~f P1lP2 ~

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PQ ~S63ampst Longmead~ MA 01028~ (413) 525-3981 bull nx 95-5426 bull Pax (413) 525-4741l I

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MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

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DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

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___eL __ ~UFAeTURERSOF EOUIPMENT FOR EDUCATION ANa wousTRv Po Box 56S ampst Longmeadow MA 0102B (413) 525S81 bull TLX 9s5426 bull Pax (4is) 525-4741

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b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

L

1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

L

a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

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ENGINEERINGo 90RPORATION -----MANUFAeTURtRS OF poundQUIPMpoundNT lOR EDUCATION ANO INDUSTfty

POmiddotBox 563 East Longmeadow MA 01028 (413) 52S~S981 o11X 95middot5426 bull Pax (413) 525-4741

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MODEL-1723 rACHoME~R

DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

bull ~liduldmaj9ri~~fvice become ne~ary please pack the inshystr~lnent securelYaJJ~s1liP it to us With a description ofthe proshyblenr encouIitered~ UsemiddotJJPSmiddotprepaid when shipping

MITEK _ ~ - lt 7tmiddot ~~

~MANS~IELDamp Gilf-EN DIVISION 860() SOMERSET DRIVE LARGO Fl 34643

TELEiHON~(813)~36-7s31

0

__-~_ - --__ ----~_ __ __ ~ ~

bull ~ ~ bullbull ltgt bullbullbull ltgt0 0

middotfL

L SERIESmiddot1-00OPERATIN~middot INSJRUCTIONS~middot

MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

L bull Fieci120VAC 15A~u~tWod~plex receptacles bull ~12OVAC single-pJiase2-~lOA bull FiX~208120VAC~phase 4-wire15A bull VariabJe 0 ~ 24oI14QVAC8-~i~~9A

f bull -Vari8bleO ~ 150vnQ-i~(lA isolated l~RMS L bull Variable 0 ~ 125VDCt 5Q -isolated ItlmiddotRMS middot

OPEBATIONTouSe the powermiddotpanelt (lISt tum ON ~MAIN AC circuit breaker~i This will m~tethemain AC pnot Hght and 9nergize the four-pin ~Pyen~i supplying fix~208120VAOtliree-phase poWer Th~ other 1ixed~d~Je sulpHes may

l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

cuit ~~ (both ~ ~ncl BEc) A clockwise lOtation of the vol~cpntro1 -- ~ ~eause ~~~~the voltage a~ble at the appropriate 1~Ptashy

L I tNOTE ~~ ~~ltage oo~~lbob fOr the 0-208120V three-phase sUpply is ~ted at the ~nd or the

housbigmiddotmiddotmiddotmiddot r L

IfanY~r~es11PplifSri-e~vefloaded one or more circuit breakers may trip middotOFF Al- ir ways turnthemiddotVariable suppllesto zero and remove the C8usaopound the oyerload before resetshy

JL ting the circuitmiddotl~~em

A pindiilg ~ groun4 oenn~oDis proVided at each end or the panel fOrgrounding the rotating macbin~

ENGINEERING CORPORATION -----MANUFACTURERS OF eciuaPMENT R)R EOUCAT1ON AND INDUSTRV bull

PO Box 563 East ~ow IdA 91028 (413) S25-S9ff1 bull nx 95-5426 bull Fax (41~) S2S-4141

[

Page 34: [1 Table D. - UTKweb.eecs.utk.edu/~jsl/ECE325/ECE325-LabManual.pdfLab #2 Load-Speed Characteristic of a DC Motor . Objective . The objective of . this . lab is to . detennine the load-speed

l

L E-2middotCont

-17 35 Henry

-13 47 Henry

middotINDUCTANCEDIAL POSITIONmiddot (~middotQLJNT~RCmiddotLOCKWJSE)

-12 51 Henry

middot11 ~ 57 Henry

middot10shy bull67ltHel1ly

~9 bull74H~

~ 85Heol

-5 143H~nrYmiddot

-15 ~41middotmiddotHQIllY

~ 271~n~

-14 43middotmiddotHemy

o 10bull56 Hemymiddot

-16 37 Henry~

-7 97 HefJry

middot6 middot1tt~H~nry

-18 33 HenlY

DIAL POSITION CAPACITANCE (CLOCKWISE)

0 69 llF

1 1~57 J1F

2 316 J1F

3 501Jlf

middot4 640J1F

5 80~J1f

6 985 j1f 7 1160middotpF

8 1360J1Fmiddot

9 1609middotJ1F

10 18~JtF

11 2007~middotF

12 2170 fLF

13 2513 )iFmiddot

14 2860J1F

15 3090 pFmiddot

15 3269JlF

17 3539 JlFmiddot (

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Lmiddot EN~INEERING CORPORATION ----MANUfACTURERS OF-EOUIPMSNTfQI EOUCATJON AND INDUSTRY

r middot PO BoxS63bullEast Longmeadow ~ ~1028 (113) 525-3981-(800) 253-2133 Fax (413) 52~741 l

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- bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull bull

bull f

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SERIES 100OPERATING INSTAUCTIONS L

- -

-

MODJL ACVA-10()ACMETERINGPANEL L GENERAL The HAMPDEN Model ACVA-1OO consistsmiddotol two AC ammetem and one AC voltshy

meterA11 or the meters are dioaeprot8cted against overloads as high 1Ui 1000f

The ~ltmeter islicctt8 within 8 w1UIemiddotthe ammeters are accurate wi~hin ~ plusmn29D ormiddotfWl sCale dellection The middotme~rshave the following ranges

r I AC Voltm~teI Oto l00~OO V~ts ~ AC Amme~ OtlJQ5f2f4l8-Amps

r bull shy

L f

- shy

f L

OPERATION

AC AMMETERS

L 1 Connect the ammeter in series so that the middotentire AC current to be measured passes

I through the ~~ter The test lead from the dark blue middotbindingpostis connected to one

side or the Dne and the test lead trom the Qrange bin~ post to the other ~ L

2 ~e choice or measuring range is iet with the range switch Fourmiddotranges are avaiiable O 05 0204 an~ 0 - 8 amperes

8 Set the rangemiddotswitch on the 8 ampere range Detore turning on the power

a) When ~ to measure motor current put a jumper lead between the tWo binding poststo protect the movement from the large inrushcurrent at start This jumper is

(

removed after the motor has started

--~---~--~_--------~---_~_----ENGINEERfNG CORPORATION

MANUFACTURERSmiddotOF rpUIPMCNT F()R EDUCATION AND INDUSTRY

L POmiddotBoxS63 East Longmeadow MA 01028middot (413) 525-3981 bull TLX 9gt5426 bull Pax (413) S2S-474i

L

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F4

SERIES too OPERATINGINSTBUCTIONS bullbull It bull bull - - _- _ _ - ~ e - _

r r

MODELACWM-1 GO WATIMETER PANEL

GENERAL The1iAMPDEN Model ACWMmiddotI00 consists artwo Iilulti-rangewattmeters and

I tbe~tchesh-lh~r operation Eacli has ~e follOwing ranges l

)to 1~30016~1200W

(150300Volts 2148 Amps)

I

t

1 L

i ~

OPERATION Measure wattage bymiddotconn8cling a wattmetervoltmeter andmiddot~ete~8sshownin Figtt81 The ~-MPstttOn mustO be~middotconn~middotin series- with the ioad and-the

r

VQTS con mUstmiddotbeqo~n~middotiJ1 prU9l1elwith the load protected against overloads by diodes

The Otlrrent~Coils are

L

fmiddot L

-FIGURE 1 WATTMETER CONNECnONS 14IJ -- -

L ENGINEERrNG CORPORATION ~ _ MANUFAcnJRERS OF eQUIPMeNT FOR EDUCATION AND 1N0USTftY

[shy Po Box 563 East LongmeadowmiddotMA 01028middot (~13) 525-3981 i nx 95-5426 bull Fax (413) 525-4741 ~

~

B ---------f~

c---------o--shy

Balanced Load

F-4 Cent

Each wa~eter has tWomiddot Voltage mtinp (150 and- 800V)~ Rotating the range -switclirounterciOCkwise from OFF engages the 150 volt range Rotatmg the _range SWitch clOQkwise from O~ engages the 800 volt range Utilize the Voltmeters readiDg to determine the approprlllte-range

Each wattmetermiddot has three currentmiddot ratings (2 4 and SA) Rotating the range swiJchfrom middotO~engages the Samprarigefbst ~ the wattm~termiddotreadsbelow ~r 8Cll18 and the ammeter indicates that the 4 amp rating will not be ~e9 ~ectmiddotthe 4 ainp range-middot If the mttnie~ again reads below balt scaie and the ammeterindicates that the 2 amp rating will no~ bemiddot exceeded the 2 amp range may bese1ectedI

r

tshyFlgttte 2iDdicatesmiddotmiddottbe CODDectio~ required with a threamppbase tJtreewire load

( L

f J L- 3g3W

Input L (

L

L FIGURE 2 WATTMETER CONNECTIONS 3fi1

(

L middot The totalwatbge is the sum of the two meter readings PI and P2

f When pow~ in a ~ced load is m~ured in this ~er the indication or the 1

two ~eterS VlLL~PT be the same except at 1D1ity power factor middot -shy

When the power factor of the circuit is less than 509b the pointer of meter PI will reverse~ To obtain total wattage in this case reverse the current connections to metet Pl -then subtract the rea~g ormeter PI from that of meter P2

The twO-wattmeter~method cannot be used with as-phase 4-wire load Three wattmeters are ~ in that case

f

I-shy

L eNGINEERING CmiddotORPORATION -----w-NUFACTUREAS OF EQUIPMeNT fOR eDUcATIOH NCO INOUSTAY

L Po Box 563 EastLcmgm~~owMi 01028 (413) 525middot3981 bull~middot9S-S42~ bull Pax (413)525-4741

F-4 Cont I L

POWER FACTOR i f ~

Given a balallCed load the~oWer tacentor middoteanbe -d~emiined from the two wattmeter mth6cL - ~

L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

J be calca1ated -from-the -following_equation0

J ~

tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

wherep2 repr~ts th~~ier~thetwoWl1ttiJ1~ re~ingswhentbepower faeto~l~other thaD uPity

f L

BiDet th~powertaetb~ 8q1alsthcosme ofthephaseangletP~powerfactor may also be I deterJninedfromtheratioo~thetwo wittmeterreadings middotmiddotThegraph b~ow shows the1 I

I relationship between themiddotpowerfacior andth~ratio~f P1lP2 ~

r t ~

I - shy

r

middotL

shy 1 -

i i- Ratio = cos 30 + +gt = f

dOS (30 -- +gt P2 f I i shy

f

N

PowerFactor of 8 Balanced 3~phas~ Load from Ratio of P11P2L

rmiddot

L bull -co

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bull IL r -

ENGINEERING CORPORATIONL --------~ACTURERSOFEQUlPMENT FOR EDUCATION AND ~y

PQ ~S63ampst Longmead~ MA 01028~ (413) 525-3981 bull nx 95-5426 bull Pax (413) 525-4741l I

r F-5 L

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SERIES 100- OPERATING INSTRUCTIO-JS bull t

I 1 i L

MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

L L

f L (

L

L OPERATIONI

i I

L shy

I

DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

L shy6IfIamp_0 middotEN G I NmiddotEmiddotEmiddotR ING COR PO RmiddotATi ()N

___eL __ ~UFAeTURERSOF EOUIPMENT FOR EDUCATION ANa wousTRv Po Box 56S ampst Longmeadow MA 0102B (413) 525S81 bull TLX 9s5426 bull Pax (4is) 525-4741

r- 1 L

L

I

F-SCont

r

t

--shy

agt If the currePtis~ter than 5 amperes the needlewDI move off-scale TuRN OFF POVER IMliEDIATELY AJf exception to this may be on motor starling Momenshytary current inrushbullmay exceed 5 ampe~ but theneedleiminediately drops back to normal

b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

L

1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

L

a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

( L i ~

L

L [

L f bull

I

ENGINEERINGo 90RPORATION -----MANUFAeTURtRS OF poundQUIPMpoundNT lOR EDUCATION ANO INDUSTfty

POmiddotBox 563 East Longmeadow MA 01028 (413) 52S~S981 o11X 95middot5426 bull Pax (413) 525-4741

(~ _~ _ -r [-- ~ --- r-middotmiddot ~t

~ bullbullbullbull ItrI~~ ~ ~

-middotmiddotmiddot bullbull ~ ~ r-Imiddotmiddotmiddot rmiddot- middot rmiddotmiddotmiddotmiddot r- bull ItmiddotoO bull bull ( bullbullbullbull bullbullbullbullbull [ bullbullbull- (_bullbull-- ~ 1r- r -- r- r r tmiddot

0

t bull I

MODEL-1723 rACHoME~R

DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

bull ~liduldmaj9ri~~fvice become ne~ary please pack the inshystr~lnent securelYaJJ~s1liP it to us With a description ofthe proshyblenr encouIitered~ UsemiddotJJPSmiddotprepaid when shipping

MITEK _ ~ - lt 7tmiddot ~~

~MANS~IELDamp Gilf-EN DIVISION 860() SOMERSET DRIVE LARGO Fl 34643

TELEiHON~(813)~36-7s31

0

__-~_ - --__ ----~_ __ __ ~ ~

bull ~ ~ bullbull ltgt bullbullbull ltgt0 0

middotfL

L SERIESmiddot1-00OPERATIN~middot INSJRUCTIONS~middot

MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

L bull Fieci120VAC 15A~u~tWod~plex receptacles bull ~12OVAC single-pJiase2-~lOA bull FiX~208120VAC~phase 4-wire15A bull VariabJe 0 ~ 24oI14QVAC8-~i~~9A

f bull -Vari8bleO ~ 150vnQ-i~(lA isolated l~RMS L bull Variable 0 ~ 125VDCt 5Q -isolated ItlmiddotRMS middot

OPEBATIONTouSe the powermiddotpanelt (lISt tum ON ~MAIN AC circuit breaker~i This will m~tethemain AC pnot Hght and 9nergize the four-pin ~Pyen~i supplying fix~208120VAOtliree-phase poWer Th~ other 1ixed~d~Je sulpHes may

l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

cuit ~~ (both ~ ~ncl BEc) A clockwise lOtation of the vol~cpntro1 -- ~ ~eause ~~~~the voltage a~ble at the appropriate 1~Ptashy

L I tNOTE ~~ ~~ltage oo~~lbob fOr the 0-208120V three-phase sUpply is ~ted at the ~nd or the

housbigmiddotmiddotmiddotmiddot r L

IfanY~r~es11PplifSri-e~vefloaded one or more circuit breakers may trip middotOFF Al- ir ways turnthemiddotVariable suppllesto zero and remove the C8usaopound the oyerload before resetshy

JL ting the circuitmiddotl~~em

A pindiilg ~ groun4 oenn~oDis proVided at each end or the panel fOrgrounding the rotating macbin~

ENGINEERING CORPORATION -----MANUFACTURERS OF eciuaPMENT R)R EOUCAT1ON AND INDUSTRV bull

PO Box 563 East ~ow IdA 91028 (413) S25-S9ff1 bull nx 95-5426 bull Fax (41~) S2S-4141

[

Page 35: [1 Table D. - UTKweb.eecs.utk.edu/~jsl/ECE325/ECE325-LabManual.pdfLab #2 Load-Speed Characteristic of a DC Motor . Objective . The objective of . this . lab is to . detennine the load-speed

~~~~i~~[~~~r~~~~~~~~~i~~~s~~~=f~~middot~~j~~~middot~~E~sect~~~~~~~~~~i~t~~~~~s~~~~~ ~~~~~~~~~~~~~_~~- N- _ bullbullbull--- ----middotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotmiddotH

- bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull bull

bull f

i f F-2L

J shy

SERIES 100OPERATING INSTAUCTIONS L

- -

-

MODJL ACVA-10()ACMETERINGPANEL L GENERAL The HAMPDEN Model ACVA-1OO consistsmiddotol two AC ammetem and one AC voltshy

meterA11 or the meters are dioaeprot8cted against overloads as high 1Ui 1000f

The ~ltmeter islicctt8 within 8 w1UIemiddotthe ammeters are accurate wi~hin ~ plusmn29D ormiddotfWl sCale dellection The middotme~rshave the following ranges

r I AC Voltm~teI Oto l00~OO V~ts ~ AC Amme~ OtlJQ5f2f4l8-Amps

r bull shy

L f

- shy

f L

OPERATION

AC AMMETERS

L 1 Connect the ammeter in series so that the middotentire AC current to be measured passes

I through the ~~ter The test lead from the dark blue middotbindingpostis connected to one

side or the Dne and the test lead trom the Qrange bin~ post to the other ~ L

2 ~e choice or measuring range is iet with the range switch Fourmiddotranges are avaiiable O 05 0204 an~ 0 - 8 amperes

8 Set the rangemiddotswitch on the 8 ampere range Detore turning on the power

a) When ~ to measure motor current put a jumper lead between the tWo binding poststo protect the movement from the large inrushcurrent at start This jumper is

(

removed after the motor has started

--~---~--~_--------~---_~_----ENGINEERfNG CORPORATION

MANUFACTURERSmiddotOF rpUIPMCNT F()R EDUCATION AND INDUSTRY

L POmiddotBoxS63 East Longmeadow MA 01028middot (413) 525-3981 bull TLX 9gt5426 bull Pax (413) S2S-474i

L

f

F4

SERIES too OPERATINGINSTBUCTIONS bullbull It bull bull - - _- _ _ - ~ e - _

r r

MODELACWM-1 GO WATIMETER PANEL

GENERAL The1iAMPDEN Model ACWMmiddotI00 consists artwo Iilulti-rangewattmeters and

I tbe~tchesh-lh~r operation Eacli has ~e follOwing ranges l

)to 1~30016~1200W

(150300Volts 2148 Amps)

I

t

1 L

i ~

OPERATION Measure wattage bymiddotconn8cling a wattmetervoltmeter andmiddot~ete~8sshownin Figtt81 The ~-MPstttOn mustO be~middotconn~middotin series- with the ioad and-the

r

VQTS con mUstmiddotbeqo~n~middotiJ1 prU9l1elwith the load protected against overloads by diodes

The Otlrrent~Coils are

L

fmiddot L

-FIGURE 1 WATTMETER CONNECnONS 14IJ -- -

L ENGINEERrNG CORPORATION ~ _ MANUFAcnJRERS OF eQUIPMeNT FOR EDUCATION AND 1N0USTftY

[shy Po Box 563 East LongmeadowmiddotMA 01028middot (~13) 525-3981 i nx 95-5426 bull Fax (413) 525-4741 ~

~

B ---------f~

c---------o--shy

Balanced Load

F-4 Cent

Each wa~eter has tWomiddot Voltage mtinp (150 and- 800V)~ Rotating the range -switclirounterciOCkwise from OFF engages the 150 volt range Rotatmg the _range SWitch clOQkwise from O~ engages the 800 volt range Utilize the Voltmeters readiDg to determine the approprlllte-range

Each wattmetermiddot has three currentmiddot ratings (2 4 and SA) Rotating the range swiJchfrom middotO~engages the Samprarigefbst ~ the wattm~termiddotreadsbelow ~r 8Cll18 and the ammeter indicates that the 4 amp rating will not be ~e9 ~ectmiddotthe 4 ainp range-middot If the mttnie~ again reads below balt scaie and the ammeterindicates that the 2 amp rating will no~ bemiddot exceeded the 2 amp range may bese1ectedI

r

tshyFlgttte 2iDdicatesmiddotmiddottbe CODDectio~ required with a threamppbase tJtreewire load

( L

f J L- 3g3W

Input L (

L

L FIGURE 2 WATTMETER CONNECTIONS 3fi1

(

L middot The totalwatbge is the sum of the two meter readings PI and P2

f When pow~ in a ~ced load is m~ured in this ~er the indication or the 1

two ~eterS VlLL~PT be the same except at 1D1ity power factor middot -shy

When the power factor of the circuit is less than 509b the pointer of meter PI will reverse~ To obtain total wattage in this case reverse the current connections to metet Pl -then subtract the rea~g ormeter PI from that of meter P2

The twO-wattmeter~method cannot be used with as-phase 4-wire load Three wattmeters are ~ in that case

f

I-shy

L eNGINEERING CmiddotORPORATION -----w-NUFACTUREAS OF EQUIPMeNT fOR eDUcATIOH NCO INOUSTAY

L Po Box 563 EastLcmgm~~owMi 01028 (413) 525middot3981 bull~middot9S-S42~ bull Pax (413)525-4741

F-4 Cont I L

POWER FACTOR i f ~

Given a balallCed load the~oWer tacentor middoteanbe -d~emiined from the two wattmeter mth6cL - ~

L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

J be calca1ated -from-the -following_equation0

J ~

tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

wherep2 repr~ts th~~ier~thetwoWl1ttiJ1~ re~ingswhentbepower faeto~l~other thaD uPity

f L

BiDet th~powertaetb~ 8q1alsthcosme ofthephaseangletP~powerfactor may also be I deterJninedfromtheratioo~thetwo wittmeterreadings middotmiddotThegraph b~ow shows the1 I

I relationship between themiddotpowerfacior andth~ratio~f P1lP2 ~

r t ~

I - shy

r

middotL

shy 1 -

i i- Ratio = cos 30 + +gt = f

dOS (30 -- +gt P2 f I i shy

f

N

PowerFactor of 8 Balanced 3~phas~ Load from Ratio of P11P2L

rmiddot

L bull -co

f L

bull IL r -

ENGINEERING CORPORATIONL --------~ACTURERSOFEQUlPMENT FOR EDUCATION AND ~y

PQ ~S63ampst Longmead~ MA 01028~ (413) 525-3981 bull nx 95-5426 bull Pax (413) 525-4741l I

r F-5 L

r

i L

SERIES 100- OPERATING INSTRUCTIO-JS bull t

I 1 i L

MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

L L

f L (

L

L OPERATIONI

i I

L shy

I

DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

L shy6IfIamp_0 middotEN G I NmiddotEmiddotEmiddotR ING COR PO RmiddotATi ()N

___eL __ ~UFAeTURERSOF EOUIPMENT FOR EDUCATION ANa wousTRv Po Box 56S ampst Longmeadow MA 0102B (413) 525S81 bull TLX 9s5426 bull Pax (4is) 525-4741

r- 1 L

L

I

F-SCont

r

t

--shy

agt If the currePtis~ter than 5 amperes the needlewDI move off-scale TuRN OFF POVER IMliEDIATELY AJf exception to this may be on motor starling Momenshytary current inrushbullmay exceed 5 ampe~ but theneedleiminediately drops back to normal

b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

L

1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

L

a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

( L i ~

L

L [

L f bull

I

ENGINEERINGo 90RPORATION -----MANUFAeTURtRS OF poundQUIPMpoundNT lOR EDUCATION ANO INDUSTfty

POmiddotBox 563 East Longmeadow MA 01028 (413) 52S~S981 o11X 95middot5426 bull Pax (413) 525-4741

(~ _~ _ -r [-- ~ --- r-middotmiddot ~t

~ bullbullbullbull ItrI~~ ~ ~

-middotmiddotmiddot bullbull ~ ~ r-Imiddotmiddotmiddot rmiddot- middot rmiddotmiddotmiddotmiddot r- bull ItmiddotoO bull bull ( bullbullbullbull bullbullbullbullbull [ bullbullbull- (_bullbull-- ~ 1r- r -- r- r r tmiddot

0

t bull I

MODEL-1723 rACHoME~R

DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

bull ~liduldmaj9ri~~fvice become ne~ary please pack the inshystr~lnent securelYaJJ~s1liP it to us With a description ofthe proshyblenr encouIitered~ UsemiddotJJPSmiddotprepaid when shipping

MITEK _ ~ - lt 7tmiddot ~~

~MANS~IELDamp Gilf-EN DIVISION 860() SOMERSET DRIVE LARGO Fl 34643

TELEiHON~(813)~36-7s31

0

__-~_ - --__ ----~_ __ __ ~ ~

bull ~ ~ bullbull ltgt bullbullbull ltgt0 0

middotfL

L SERIESmiddot1-00OPERATIN~middot INSJRUCTIONS~middot

MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

L bull Fieci120VAC 15A~u~tWod~plex receptacles bull ~12OVAC single-pJiase2-~lOA bull FiX~208120VAC~phase 4-wire15A bull VariabJe 0 ~ 24oI14QVAC8-~i~~9A

f bull -Vari8bleO ~ 150vnQ-i~(lA isolated l~RMS L bull Variable 0 ~ 125VDCt 5Q -isolated ItlmiddotRMS middot

OPEBATIONTouSe the powermiddotpanelt (lISt tum ON ~MAIN AC circuit breaker~i This will m~tethemain AC pnot Hght and 9nergize the four-pin ~Pyen~i supplying fix~208120VAOtliree-phase poWer Th~ other 1ixed~d~Je sulpHes may

l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

cuit ~~ (both ~ ~ncl BEc) A clockwise lOtation of the vol~cpntro1 -- ~ ~eause ~~~~the voltage a~ble at the appropriate 1~Ptashy

L I tNOTE ~~ ~~ltage oo~~lbob fOr the 0-208120V three-phase sUpply is ~ted at the ~nd or the

housbigmiddotmiddotmiddotmiddot r L

IfanY~r~es11PplifSri-e~vefloaded one or more circuit breakers may trip middotOFF Al- ir ways turnthemiddotVariable suppllesto zero and remove the C8usaopound the oyerload before resetshy

JL ting the circuitmiddotl~~em

A pindiilg ~ groun4 oenn~oDis proVided at each end or the panel fOrgrounding the rotating macbin~

ENGINEERING CORPORATION -----MANUFACTURERS OF eciuaPMENT R)R EOUCAT1ON AND INDUSTRV bull

PO Box 563 East ~ow IdA 91028 (413) S25-S9ff1 bull nx 95-5426 bull Fax (41~) S2S-4141

[

Page 36: [1 Table D. - UTKweb.eecs.utk.edu/~jsl/ECE325/ECE325-LabManual.pdfLab #2 Load-Speed Characteristic of a DC Motor . Objective . The objective of . this . lab is to . detennine the load-speed

L

f

F4

SERIES too OPERATINGINSTBUCTIONS bullbull It bull bull - - _- _ _ - ~ e - _

r r

MODELACWM-1 GO WATIMETER PANEL

GENERAL The1iAMPDEN Model ACWMmiddotI00 consists artwo Iilulti-rangewattmeters and

I tbe~tchesh-lh~r operation Eacli has ~e follOwing ranges l

)to 1~30016~1200W

(150300Volts 2148 Amps)

I

t

1 L

i ~

OPERATION Measure wattage bymiddotconn8cling a wattmetervoltmeter andmiddot~ete~8sshownin Figtt81 The ~-MPstttOn mustO be~middotconn~middotin series- with the ioad and-the

r

VQTS con mUstmiddotbeqo~n~middotiJ1 prU9l1elwith the load protected against overloads by diodes

The Otlrrent~Coils are

L

fmiddot L

-FIGURE 1 WATTMETER CONNECnONS 14IJ -- -

L ENGINEERrNG CORPORATION ~ _ MANUFAcnJRERS OF eQUIPMeNT FOR EDUCATION AND 1N0USTftY

[shy Po Box 563 East LongmeadowmiddotMA 01028middot (~13) 525-3981 i nx 95-5426 bull Fax (413) 525-4741 ~

~

B ---------f~

c---------o--shy

Balanced Load

F-4 Cent

Each wa~eter has tWomiddot Voltage mtinp (150 and- 800V)~ Rotating the range -switclirounterciOCkwise from OFF engages the 150 volt range Rotatmg the _range SWitch clOQkwise from O~ engages the 800 volt range Utilize the Voltmeters readiDg to determine the approprlllte-range

Each wattmetermiddot has three currentmiddot ratings (2 4 and SA) Rotating the range swiJchfrom middotO~engages the Samprarigefbst ~ the wattm~termiddotreadsbelow ~r 8Cll18 and the ammeter indicates that the 4 amp rating will not be ~e9 ~ectmiddotthe 4 ainp range-middot If the mttnie~ again reads below balt scaie and the ammeterindicates that the 2 amp rating will no~ bemiddot exceeded the 2 amp range may bese1ectedI

r

tshyFlgttte 2iDdicatesmiddotmiddottbe CODDectio~ required with a threamppbase tJtreewire load

( L

f J L- 3g3W

Input L (

L

L FIGURE 2 WATTMETER CONNECTIONS 3fi1

(

L middot The totalwatbge is the sum of the two meter readings PI and P2

f When pow~ in a ~ced load is m~ured in this ~er the indication or the 1

two ~eterS VlLL~PT be the same except at 1D1ity power factor middot -shy

When the power factor of the circuit is less than 509b the pointer of meter PI will reverse~ To obtain total wattage in this case reverse the current connections to metet Pl -then subtract the rea~g ormeter PI from that of meter P2

The twO-wattmeter~method cannot be used with as-phase 4-wire load Three wattmeters are ~ in that case

f

I-shy

L eNGINEERING CmiddotORPORATION -----w-NUFACTUREAS OF EQUIPMeNT fOR eDUcATIOH NCO INOUSTAY

L Po Box 563 EastLcmgm~~owMi 01028 (413) 525middot3981 bull~middot9S-S42~ bull Pax (413)525-4741

F-4 Cont I L

POWER FACTOR i f ~

Given a balallCed load the~oWer tacentor middoteanbe -d~emiined from the two wattmeter mth6cL - ~

L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

J be calca1ated -from-the -following_equation0

J ~

tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

wherep2 repr~ts th~~ier~thetwoWl1ttiJ1~ re~ingswhentbepower faeto~l~other thaD uPity

f L

BiDet th~powertaetb~ 8q1alsthcosme ofthephaseangletP~powerfactor may also be I deterJninedfromtheratioo~thetwo wittmeterreadings middotmiddotThegraph b~ow shows the1 I

I relationship between themiddotpowerfacior andth~ratio~f P1lP2 ~

r t ~

I - shy

r

middotL

shy 1 -

i i- Ratio = cos 30 + +gt = f

dOS (30 -- +gt P2 f I i shy

f

N

PowerFactor of 8 Balanced 3~phas~ Load from Ratio of P11P2L

rmiddot

L bull -co

f L

bull IL r -

ENGINEERING CORPORATIONL --------~ACTURERSOFEQUlPMENT FOR EDUCATION AND ~y

PQ ~S63ampst Longmead~ MA 01028~ (413) 525-3981 bull nx 95-5426 bull Pax (413) 525-4741l I

r F-5 L

r

i L

SERIES 100- OPERATING INSTRUCTIO-JS bull t

I 1 i L

MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

L L

f L (

L

L OPERATIONI

i I

L shy

I

DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

L shy6IfIamp_0 middotEN G I NmiddotEmiddotEmiddotR ING COR PO RmiddotATi ()N

___eL __ ~UFAeTURERSOF EOUIPMENT FOR EDUCATION ANa wousTRv Po Box 56S ampst Longmeadow MA 0102B (413) 525S81 bull TLX 9s5426 bull Pax (4is) 525-4741

r- 1 L

L

I

F-SCont

r

t

--shy

agt If the currePtis~ter than 5 amperes the needlewDI move off-scale TuRN OFF POVER IMliEDIATELY AJf exception to this may be on motor starling Momenshytary current inrushbullmay exceed 5 ampe~ but theneedleiminediately drops back to normal

b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

L

1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

L

a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

( L i ~

L

L [

L f bull

I

ENGINEERINGo 90RPORATION -----MANUFAeTURtRS OF poundQUIPMpoundNT lOR EDUCATION ANO INDUSTfty

POmiddotBox 563 East Longmeadow MA 01028 (413) 52S~S981 o11X 95middot5426 bull Pax (413) 525-4741

(~ _~ _ -r [-- ~ --- r-middotmiddot ~t

~ bullbullbullbull ItrI~~ ~ ~

-middotmiddotmiddot bullbull ~ ~ r-Imiddotmiddotmiddot rmiddot- middot rmiddotmiddotmiddotmiddot r- bull ItmiddotoO bull bull ( bullbullbullbull bullbullbullbullbull [ bullbullbull- (_bullbull-- ~ 1r- r -- r- r r tmiddot

0

t bull I

MODEL-1723 rACHoME~R

DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

bull ~liduldmaj9ri~~fvice become ne~ary please pack the inshystr~lnent securelYaJJ~s1liP it to us With a description ofthe proshyblenr encouIitered~ UsemiddotJJPSmiddotprepaid when shipping

MITEK _ ~ - lt 7tmiddot ~~

~MANS~IELDamp Gilf-EN DIVISION 860() SOMERSET DRIVE LARGO Fl 34643

TELEiHON~(813)~36-7s31

0

__-~_ - --__ ----~_ __ __ ~ ~

bull ~ ~ bullbull ltgt bullbullbull ltgt0 0

middotfL

L SERIESmiddot1-00OPERATIN~middot INSJRUCTIONS~middot

MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

L bull Fieci120VAC 15A~u~tWod~plex receptacles bull ~12OVAC single-pJiase2-~lOA bull FiX~208120VAC~phase 4-wire15A bull VariabJe 0 ~ 24oI14QVAC8-~i~~9A

f bull -Vari8bleO ~ 150vnQ-i~(lA isolated l~RMS L bull Variable 0 ~ 125VDCt 5Q -isolated ItlmiddotRMS middot

OPEBATIONTouSe the powermiddotpanelt (lISt tum ON ~MAIN AC circuit breaker~i This will m~tethemain AC pnot Hght and 9nergize the four-pin ~Pyen~i supplying fix~208120VAOtliree-phase poWer Th~ other 1ixed~d~Je sulpHes may

l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

cuit ~~ (both ~ ~ncl BEc) A clockwise lOtation of the vol~cpntro1 -- ~ ~eause ~~~~the voltage a~ble at the appropriate 1~Ptashy

L I tNOTE ~~ ~~ltage oo~~lbob fOr the 0-208120V three-phase sUpply is ~ted at the ~nd or the

housbigmiddotmiddotmiddotmiddot r L

IfanY~r~es11PplifSri-e~vefloaded one or more circuit breakers may trip middotOFF Al- ir ways turnthemiddotVariable suppllesto zero and remove the C8usaopound the oyerload before resetshy

JL ting the circuitmiddotl~~em

A pindiilg ~ groun4 oenn~oDis proVided at each end or the panel fOrgrounding the rotating macbin~

ENGINEERING CORPORATION -----MANUFACTURERS OF eciuaPMENT R)R EOUCAT1ON AND INDUSTRV bull

PO Box 563 East ~ow IdA 91028 (413) S25-S9ff1 bull nx 95-5426 bull Fax (41~) S2S-4141

[

Page 37: [1 Table D. - UTKweb.eecs.utk.edu/~jsl/ECE325/ECE325-LabManual.pdfLab #2 Load-Speed Characteristic of a DC Motor . Objective . The objective of . this . lab is to . detennine the load-speed

B ---------f~

c---------o--shy

Balanced Load

F-4 Cent

Each wa~eter has tWomiddot Voltage mtinp (150 and- 800V)~ Rotating the range -switclirounterciOCkwise from OFF engages the 150 volt range Rotatmg the _range SWitch clOQkwise from O~ engages the 800 volt range Utilize the Voltmeters readiDg to determine the approprlllte-range

Each wattmetermiddot has three currentmiddot ratings (2 4 and SA) Rotating the range swiJchfrom middotO~engages the Samprarigefbst ~ the wattm~termiddotreadsbelow ~r 8Cll18 and the ammeter indicates that the 4 amp rating will not be ~e9 ~ectmiddotthe 4 ainp range-middot If the mttnie~ again reads below balt scaie and the ammeterindicates that the 2 amp rating will no~ bemiddot exceeded the 2 amp range may bese1ectedI

r

tshyFlgttte 2iDdicatesmiddotmiddottbe CODDectio~ required with a threamppbase tJtreewire load

( L

f J L- 3g3W

Input L (

L

L FIGURE 2 WATTMETER CONNECTIONS 3fi1

(

L middot The totalwatbge is the sum of the two meter readings PI and P2

f When pow~ in a ~ced load is m~ured in this ~er the indication or the 1

two ~eterS VlLL~PT be the same except at 1D1ity power factor middot -shy

When the power factor of the circuit is less than 509b the pointer of meter PI will reverse~ To obtain total wattage in this case reverse the current connections to metet Pl -then subtract the rea~g ormeter PI from that of meter P2

The twO-wattmeter~method cannot be used with as-phase 4-wire load Three wattmeters are ~ in that case

f

I-shy

L eNGINEERING CmiddotORPORATION -----w-NUFACTUREAS OF EQUIPMeNT fOR eDUcATIOH NCO INOUSTAY

L Po Box 563 EastLcmgm~~owMi 01028 (413) 525middot3981 bull~middot9S-S42~ bull Pax (413)525-4741

F-4 Cont I L

POWER FACTOR i f ~

Given a balallCed load the~oWer tacentor middoteanbe -d~emiined from the two wattmeter mth6cL - ~

L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

J be calca1ated -from-the -following_equation0

J ~

tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

wherep2 repr~ts th~~ier~thetwoWl1ttiJ1~ re~ingswhentbepower faeto~l~other thaD uPity

f L

BiDet th~powertaetb~ 8q1alsthcosme ofthephaseangletP~powerfactor may also be I deterJninedfromtheratioo~thetwo wittmeterreadings middotmiddotThegraph b~ow shows the1 I

I relationship between themiddotpowerfacior andth~ratio~f P1lP2 ~

r t ~

I - shy

r

middotL

shy 1 -

i i- Ratio = cos 30 + +gt = f

dOS (30 -- +gt P2 f I i shy

f

N

PowerFactor of 8 Balanced 3~phas~ Load from Ratio of P11P2L

rmiddot

L bull -co

f L

bull IL r -

ENGINEERING CORPORATIONL --------~ACTURERSOFEQUlPMENT FOR EDUCATION AND ~y

PQ ~S63ampst Longmead~ MA 01028~ (413) 525-3981 bull nx 95-5426 bull Pax (413) 525-4741l I

r F-5 L

r

i L

SERIES 100- OPERATING INSTRUCTIO-JS bull t

I 1 i L

MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

L L

f L (

L

L OPERATIONI

i I

L shy

I

DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

L shy6IfIamp_0 middotEN G I NmiddotEmiddotEmiddotR ING COR PO RmiddotATi ()N

___eL __ ~UFAeTURERSOF EOUIPMENT FOR EDUCATION ANa wousTRv Po Box 56S ampst Longmeadow MA 0102B (413) 525S81 bull TLX 9s5426 bull Pax (4is) 525-4741

r- 1 L

L

I

F-SCont

r

t

--shy

agt If the currePtis~ter than 5 amperes the needlewDI move off-scale TuRN OFF POVER IMliEDIATELY AJf exception to this may be on motor starling Momenshytary current inrushbullmay exceed 5 ampe~ but theneedleiminediately drops back to normal

b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

L

1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

L

a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

( L i ~

L

L [

L f bull

I

ENGINEERINGo 90RPORATION -----MANUFAeTURtRS OF poundQUIPMpoundNT lOR EDUCATION ANO INDUSTfty

POmiddotBox 563 East Longmeadow MA 01028 (413) 52S~S981 o11X 95middot5426 bull Pax (413) 525-4741

(~ _~ _ -r [-- ~ --- r-middotmiddot ~t

~ bullbullbullbull ItrI~~ ~ ~

-middotmiddotmiddot bullbull ~ ~ r-Imiddotmiddotmiddot rmiddot- middot rmiddotmiddotmiddotmiddot r- bull ItmiddotoO bull bull ( bullbullbullbull bullbullbullbullbull [ bullbullbull- (_bullbull-- ~ 1r- r -- r- r r tmiddot

0

t bull I

MODEL-1723 rACHoME~R

DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

bull ~liduldmaj9ri~~fvice become ne~ary please pack the inshystr~lnent securelYaJJ~s1liP it to us With a description ofthe proshyblenr encouIitered~ UsemiddotJJPSmiddotprepaid when shipping

MITEK _ ~ - lt 7tmiddot ~~

~MANS~IELDamp Gilf-EN DIVISION 860() SOMERSET DRIVE LARGO Fl 34643

TELEiHON~(813)~36-7s31

0

__-~_ - --__ ----~_ __ __ ~ ~

bull ~ ~ bullbull ltgt bullbullbull ltgt0 0

middotfL

L SERIESmiddot1-00OPERATIN~middot INSJRUCTIONS~middot

MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

L bull Fieci120VAC 15A~u~tWod~plex receptacles bull ~12OVAC single-pJiase2-~lOA bull FiX~208120VAC~phase 4-wire15A bull VariabJe 0 ~ 24oI14QVAC8-~i~~9A

f bull -Vari8bleO ~ 150vnQ-i~(lA isolated l~RMS L bull Variable 0 ~ 125VDCt 5Q -isolated ItlmiddotRMS middot

OPEBATIONTouSe the powermiddotpanelt (lISt tum ON ~MAIN AC circuit breaker~i This will m~tethemain AC pnot Hght and 9nergize the four-pin ~Pyen~i supplying fix~208120VAOtliree-phase poWer Th~ other 1ixed~d~Je sulpHes may

l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

cuit ~~ (both ~ ~ncl BEc) A clockwise lOtation of the vol~cpntro1 -- ~ ~eause ~~~~the voltage a~ble at the appropriate 1~Ptashy

L I tNOTE ~~ ~~ltage oo~~lbob fOr the 0-208120V three-phase sUpply is ~ted at the ~nd or the

housbigmiddotmiddotmiddotmiddot r L

IfanY~r~es11PplifSri-e~vefloaded one or more circuit breakers may trip middotOFF Al- ir ways turnthemiddotVariable suppllesto zero and remove the C8usaopound the oyerload before resetshy

JL ting the circuitmiddotl~~em

A pindiilg ~ groun4 oenn~oDis proVided at each end or the panel fOrgrounding the rotating macbin~

ENGINEERING CORPORATION -----MANUFACTURERS OF eciuaPMENT R)R EOUCAT1ON AND INDUSTRV bull

PO Box 563 East ~ow IdA 91028 (413) S25-S9ff1 bull nx 95-5426 bull Fax (41~) S2S-4141

[

Page 38: [1 Table D. - UTKweb.eecs.utk.edu/~jsl/ECE325/ECE325-LabManual.pdfLab #2 Load-Speed Characteristic of a DC Motor . Objective . The objective of . this . lab is to . detennine the load-speed

F-4 Cont I L

POWER FACTOR i f ~

Given a balallCed load the~oWer tacentor middoteanbe -d~emiined from the two wattmeter mth6cL - ~

L Power fiut~r equWs the cosine of th ptmrerfacior phase angle The phase angle JUay

J be calca1ated -from-the -following_equation0

J ~

tan + =L132 ((P2~Pl)(P2+Pl) l middot r L~

wherep2 repr~ts th~~ier~thetwoWl1ttiJ1~ re~ingswhentbepower faeto~l~other thaD uPity

f L

BiDet th~powertaetb~ 8q1alsthcosme ofthephaseangletP~powerfactor may also be I deterJninedfromtheratioo~thetwo wittmeterreadings middotmiddotThegraph b~ow shows the1 I

I relationship between themiddotpowerfacior andth~ratio~f P1lP2 ~

r t ~

I - shy

r

middotL

shy 1 -

i i- Ratio = cos 30 + +gt = f

dOS (30 -- +gt P2 f I i shy

f

N

PowerFactor of 8 Balanced 3~phas~ Load from Ratio of P11P2L

rmiddot

L bull -co

f L

bull IL r -

ENGINEERING CORPORATIONL --------~ACTURERSOFEQUlPMENT FOR EDUCATION AND ~y

PQ ~S63ampst Longmead~ MA 01028~ (413) 525-3981 bull nx 95-5426 bull Pax (413) 525-4741l I

r F-5 L

r

i L

SERIES 100- OPERATING INSTRUCTIO-JS bull t

I 1 i L

MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

L L

f L (

L

L OPERATIONI

i I

L shy

I

DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

L shy6IfIamp_0 middotEN G I NmiddotEmiddotEmiddotR ING COR PO RmiddotATi ()N

___eL __ ~UFAeTURERSOF EOUIPMENT FOR EDUCATION ANa wousTRv Po Box 56S ampst Longmeadow MA 0102B (413) 525S81 bull TLX 9s5426 bull Pax (4is) 525-4741

r- 1 L

L

I

F-SCont

r

t

--shy

agt If the currePtis~ter than 5 amperes the needlewDI move off-scale TuRN OFF POVER IMliEDIATELY AJf exception to this may be on motor starling Momenshytary current inrushbullmay exceed 5 ampe~ but theneedleiminediately drops back to normal

b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

L

1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

L

a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

( L i ~

L

L [

L f bull

I

ENGINEERINGo 90RPORATION -----MANUFAeTURtRS OF poundQUIPMpoundNT lOR EDUCATION ANO INDUSTfty

POmiddotBox 563 East Longmeadow MA 01028 (413) 52S~S981 o11X 95middot5426 bull Pax (413) 525-4741

(~ _~ _ -r [-- ~ --- r-middotmiddot ~t

~ bullbullbullbull ItrI~~ ~ ~

-middotmiddotmiddot bullbull ~ ~ r-Imiddotmiddotmiddot rmiddot- middot rmiddotmiddotmiddotmiddot r- bull ItmiddotoO bull bull ( bullbullbullbull bullbullbullbullbull [ bullbullbull- (_bullbull-- ~ 1r- r -- r- r r tmiddot

0

t bull I

MODEL-1723 rACHoME~R

DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

bull ~liduldmaj9ri~~fvice become ne~ary please pack the inshystr~lnent securelYaJJ~s1liP it to us With a description ofthe proshyblenr encouIitered~ UsemiddotJJPSmiddotprepaid when shipping

MITEK _ ~ - lt 7tmiddot ~~

~MANS~IELDamp Gilf-EN DIVISION 860() SOMERSET DRIVE LARGO Fl 34643

TELEiHON~(813)~36-7s31

0

__-~_ - --__ ----~_ __ __ ~ ~

bull ~ ~ bullbull ltgt bullbullbull ltgt0 0

middotfL

L SERIESmiddot1-00OPERATIN~middot INSJRUCTIONS~middot

MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

L bull Fieci120VAC 15A~u~tWod~plex receptacles bull ~12OVAC single-pJiase2-~lOA bull FiX~208120VAC~phase 4-wire15A bull VariabJe 0 ~ 24oI14QVAC8-~i~~9A

f bull -Vari8bleO ~ 150vnQ-i~(lA isolated l~RMS L bull Variable 0 ~ 125VDCt 5Q -isolated ItlmiddotRMS middot

OPEBATIONTouSe the powermiddotpanelt (lISt tum ON ~MAIN AC circuit breaker~i This will m~tethemain AC pnot Hght and 9nergize the four-pin ~Pyen~i supplying fix~208120VAOtliree-phase poWer Th~ other 1ixed~d~Je sulpHes may

l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

cuit ~~ (both ~ ~ncl BEc) A clockwise lOtation of the vol~cpntro1 -- ~ ~eause ~~~~the voltage a~ble at the appropriate 1~Ptashy

L I tNOTE ~~ ~~ltage oo~~lbob fOr the 0-208120V three-phase sUpply is ~ted at the ~nd or the

housbigmiddotmiddotmiddotmiddot r L

IfanY~r~es11PplifSri-e~vefloaded one or more circuit breakers may trip middotOFF Al- ir ways turnthemiddotVariable suppllesto zero and remove the C8usaopound the oyerload before resetshy

JL ting the circuitmiddotl~~em

A pindiilg ~ groun4 oenn~oDis proVided at each end or the panel fOrgrounding the rotating macbin~

ENGINEERING CORPORATION -----MANUFACTURERS OF eciuaPMENT R)R EOUCAT1ON AND INDUSTRV bull

PO Box 563 East ~ow IdA 91028 (413) S25-S9ff1 bull nx 95-5426 bull Fax (41~) S2S-4141

[

Page 39: [1 Table D. - UTKweb.eecs.utk.edu/~jsl/ECE325/ECE325-LabManual.pdfLab #2 Load-Speed Characteristic of a DC Motor . Objective . The objective of . this . lab is to . detennine the load-speed

r F-5 L

r

i L

SERIES 100- OPERATING INSTRUCTIO-JS bull t

I 1 i L

MODEL DCVA-100 DC~METERJNG PANEL

GENERAL ~e HAMPDEN Model DOVA-1OO consists of two 1C arinneteJS and two DC voltshymeters Allof the metersare diode-protected agail)StoV8rloadsssmiddothigh as 100090i - and are accurate Within plusmn2 of fullmiddotseal~def1~iOi1 Th~ m~~ hive the followshyL ing rampnges

i t i DC Voltmeters middot()15150middotVolshy

middotDC Ammeters 0-0~~255 Am~ L

L L

f L (

L

L OPERATIONI

i I

L shy

I

DC AMMETERS

i 1Connect the ammeter in series so that the entire DC current to be Jl1ellsured passesL

through the meter The teSt l~d from the ied +_t meterbinding post must be CODDected4

to the most positive sideoCthe line and the test load from the black tt meter binding post to the other side middot

10middot 2 The choiee of measuring range is set with the range -selection switch Four ranges are J available 0 I 05 o 1 0 - 25 mid 0 - 5 amperes

8 Set the range switch on the 5 ampere range before turning on the pOwer I

L shy6IfIamp_0 middotEN G I NmiddotEmiddotEmiddotR ING COR PO RmiddotATi ()N

___eL __ ~UFAeTURERSOF EOUIPMENT FOR EDUCATION ANa wousTRv Po Box 56S ampst Longmeadow MA 0102B (413) 525S81 bull TLX 9s5426 bull Pax (4is) 525-4741

r- 1 L

L

I

F-SCont

r

t

--shy

agt If the currePtis~ter than 5 amperes the needlewDI move off-scale TuRN OFF POVER IMliEDIATELY AJf exception to this may be on motor starling Momenshytary current inrushbullmay exceed 5 ampe~ but theneedleiminediately drops back to normal

b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

L

1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

L

a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

( L i ~

L

L [

L f bull

I

ENGINEERINGo 90RPORATION -----MANUFAeTURtRS OF poundQUIPMpoundNT lOR EDUCATION ANO INDUSTfty

POmiddotBox 563 East Longmeadow MA 01028 (413) 52S~S981 o11X 95middot5426 bull Pax (413) 525-4741

(~ _~ _ -r [-- ~ --- r-middotmiddot ~t

~ bullbullbullbull ItrI~~ ~ ~

-middotmiddotmiddot bullbull ~ ~ r-Imiddotmiddotmiddot rmiddot- middot rmiddotmiddotmiddotmiddot r- bull ItmiddotoO bull bull ( bullbullbullbull bullbullbullbullbull [ bullbullbull- (_bullbull-- ~ 1r- r -- r- r r tmiddot

0

t bull I

MODEL-1723 rACHoME~R

DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

bull ~liduldmaj9ri~~fvice become ne~ary please pack the inshystr~lnent securelYaJJ~s1liP it to us With a description ofthe proshyblenr encouIitered~ UsemiddotJJPSmiddotprepaid when shipping

MITEK _ ~ - lt 7tmiddot ~~

~MANS~IELDamp Gilf-EN DIVISION 860() SOMERSET DRIVE LARGO Fl 34643

TELEiHON~(813)~36-7s31

0

__-~_ - --__ ----~_ __ __ ~ ~

bull ~ ~ bullbull ltgt bullbullbull ltgt0 0

middotfL

L SERIESmiddot1-00OPERATIN~middot INSJRUCTIONS~middot

MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

L bull Fieci120VAC 15A~u~tWod~plex receptacles bull ~12OVAC single-pJiase2-~lOA bull FiX~208120VAC~phase 4-wire15A bull VariabJe 0 ~ 24oI14QVAC8-~i~~9A

f bull -Vari8bleO ~ 150vnQ-i~(lA isolated l~RMS L bull Variable 0 ~ 125VDCt 5Q -isolated ItlmiddotRMS middot

OPEBATIONTouSe the powermiddotpanelt (lISt tum ON ~MAIN AC circuit breaker~i This will m~tethemain AC pnot Hght and 9nergize the four-pin ~Pyen~i supplying fix~208120VAOtliree-phase poWer Th~ other 1ixed~d~Je sulpHes may

l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

cuit ~~ (both ~ ~ncl BEc) A clockwise lOtation of the vol~cpntro1 -- ~ ~eause ~~~~the voltage a~ble at the appropriate 1~Ptashy

L I tNOTE ~~ ~~ltage oo~~lbob fOr the 0-208120V three-phase sUpply is ~ted at the ~nd or the

housbigmiddotmiddotmiddotmiddot r L

IfanY~r~es11PplifSri-e~vefloaded one or more circuit breakers may trip middotOFF Al- ir ways turnthemiddotVariable suppllesto zero and remove the C8usaopound the oyerload before resetshy

JL ting the circuitmiddotl~~em

A pindiilg ~ groun4 oenn~oDis proVided at each end or the panel fOrgrounding the rotating macbin~

ENGINEERING CORPORATION -----MANUFACTURERS OF eciuaPMENT R)R EOUCAT1ON AND INDUSTRV bull

PO Box 563 East ~ow IdA 91028 (413) S25-S9ff1 bull nx 95-5426 bull Fax (41~) S2S-4141

[

Page 40: [1 Table D. - UTKweb.eecs.utk.edu/~jsl/ECE325/ECE325-LabManual.pdfLab #2 Load-Speed Characteristic of a DC Motor . Objective . The objective of . this . lab is to . detennine the load-speed

F-SCont

r

t

--shy

agt If the currePtis~ter than 5 amperes the needlewDI move off-scale TuRN OFF POVER IMliEDIATELY AJf exception to this may be on motor starling Momenshytary current inrushbullmay exceed 5 ampe~ but theneedleiminediately drops back to normal

b) It the needle moves downscale turnoff the power and reve~ the motor leads c) If the current is greater than2pamperes but less than ~amperesread the meter on

the 5 scale and multiply there8d1ngby 10 - d~) It the Current is greater ~Dlamperebutlessthan ~~5 amperes turn the knob to the

205 ~pere range Bead the metc1ldegonthe 25 scale direct1yiItthe cu~t is less than 1 ampeieturn the kU()b tOtbe ~~pere range middot

e)middot If the ~nf isgreatetth~ 05 ampere but less than1 ampere read the meter On tl18 05 aQand mt4tiplycgtulreadlng by 2

r) It theetnTentis less tbaA-o~ anipeTe) turn the bob to theO5ampere range Read the meter directly ontheO6 scale

DC VOLTMET~RS

L

1 Connect thevoltmeterin parallel with the DC voltage to be measured The test lead from themetersred fbindingpost mustbeconn~to the positive termiIi81and the one from the bJ8ckfC-biDding ~~ust be connected to thenegativeterminal

2 Set the toggle switch to the 150 voltrtmge

L

a) If the meter ~ downsCSIe reverse the leads b) 1pound the voltage is ~ter than 75 volts and less than 150 volts read the voltage directly

on the 150 scale c) It the voltage is lessthan 75 volts set thetog~e switch to 75 volt range and read the

meter directl~ em the 75 scale

( L i ~

L

L [

L f bull

I

ENGINEERINGo 90RPORATION -----MANUFAeTURtRS OF poundQUIPMpoundNT lOR EDUCATION ANO INDUSTfty

POmiddotBox 563 East Longmeadow MA 01028 (413) 52S~S981 o11X 95middot5426 bull Pax (413) 525-4741

(~ _~ _ -r [-- ~ --- r-middotmiddot ~t

~ bullbullbullbull ItrI~~ ~ ~

-middotmiddotmiddot bullbull ~ ~ r-Imiddotmiddotmiddot rmiddot- middot rmiddotmiddotmiddotmiddot r- bull ItmiddotoO bull bull ( bullbullbullbull bullbullbullbullbull [ bullbullbull- (_bullbull-- ~ 1r- r -- r- r r tmiddot

0

t bull I

MODEL-1723 rACHoME~R

DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

bull ~liduldmaj9ri~~fvice become ne~ary please pack the inshystr~lnent securelYaJJ~s1liP it to us With a description ofthe proshyblenr encouIitered~ UsemiddotJJPSmiddotprepaid when shipping

MITEK _ ~ - lt 7tmiddot ~~

~MANS~IELDamp Gilf-EN DIVISION 860() SOMERSET DRIVE LARGO Fl 34643

TELEiHON~(813)~36-7s31

0

__-~_ - --__ ----~_ __ __ ~ ~

bull ~ ~ bullbull ltgt bullbullbull ltgt0 0

middotfL

L SERIESmiddot1-00OPERATIN~middot INSJRUCTIONS~middot

MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

L bull Fieci120VAC 15A~u~tWod~plex receptacles bull ~12OVAC single-pJiase2-~lOA bull FiX~208120VAC~phase 4-wire15A bull VariabJe 0 ~ 24oI14QVAC8-~i~~9A

f bull -Vari8bleO ~ 150vnQ-i~(lA isolated l~RMS L bull Variable 0 ~ 125VDCt 5Q -isolated ItlmiddotRMS middot

OPEBATIONTouSe the powermiddotpanelt (lISt tum ON ~MAIN AC circuit breaker~i This will m~tethemain AC pnot Hght and 9nergize the four-pin ~Pyen~i supplying fix~208120VAOtliree-phase poWer Th~ other 1ixed~d~Je sulpHes may

l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

cuit ~~ (both ~ ~ncl BEc) A clockwise lOtation of the vol~cpntro1 -- ~ ~eause ~~~~the voltage a~ble at the appropriate 1~Ptashy

L I tNOTE ~~ ~~ltage oo~~lbob fOr the 0-208120V three-phase sUpply is ~ted at the ~nd or the

housbigmiddotmiddotmiddotmiddot r L

IfanY~r~es11PplifSri-e~vefloaded one or more circuit breakers may trip middotOFF Al- ir ways turnthemiddotVariable suppllesto zero and remove the C8usaopound the oyerload before resetshy

JL ting the circuitmiddotl~~em

A pindiilg ~ groun4 oenn~oDis proVided at each end or the panel fOrgrounding the rotating macbin~

ENGINEERING CORPORATION -----MANUFACTURERS OF eciuaPMENT R)R EOUCAT1ON AND INDUSTRV bull

PO Box 563 East ~ow IdA 91028 (413) S25-S9ff1 bull nx 95-5426 bull Fax (41~) S2S-4141

[

Page 41: [1 Table D. - UTKweb.eecs.utk.edu/~jsl/ECE325/ECE325-LabManual.pdfLab #2 Load-Speed Characteristic of a DC Motor . Objective . The objective of . this . lab is to . detennine the load-speed

(~ _~ _ -r [-- ~ --- r-middotmiddot ~t

~ bullbullbullbull ItrI~~ ~ ~

-middotmiddotmiddot bullbull ~ ~ r-Imiddotmiddotmiddot rmiddot- middot rmiddotmiddotmiddotmiddot r- bull ItmiddotoO bull bull ( bullbullbullbull bullbullbullbullbull [ bullbullbull- (_bullbull-- ~ 1r- r -- r- r r tmiddot

0

t bull I

MODEL-1723 rACHoME~R

DESCRIPTION MODEL 1723 is h9uaedin a light blue plastic case the case is provided with amiddotrettactabie tilt stand to permit easy view of the display

MODEL 1723 Tachometersrange is from 100 RPM to9999 RPM

PRB~ARATIONFOR USB ~ 1vomiddot types of reflective targets are supplied They are No 11-21 which ar~ disc-shaped Y2 flat black and Y2 silver color Themiddot disc is usedmiddot on the end of a shaft to allow sensing ~haft rotation No 80-sect7 is a gray glass beaded ~pe~ The t~pe is applied to ~l

rotating surfaces ex~ept the end of the shafts~ Bach of thes~ reflective target tapes can becgtrdered separately by part number or iil combination as part numbermiddot 80-98

To apply target tape ~ Clean the surface of the rotating objeCtmiddot Tape willNOT hold on oily or djrty suraces Apply a small piece of tape on the clean or shaft CfndTry to leave ~ of the shaft diame~er uncovered to obshytain the most contrast between light and dark

POWER SuPPLY - MODEL 1723 useSllSV AC5060 Hz 220V AC can be supplied if ordered Power consumption 8 watts Use a grounded outlet plug iil the power cable supplied with the Tachometer

TO kEAD SPEED - Hold the Photo-electric Pickup (often callshyed the probe) between ~ tomiddot25 frQril the target tape Use the light beam as if it were a fl~hIight and aim the beam at the target tape The display will show the RPM

MA1NT~~ANCE-CHEcentKINO(JrERATION~Pomt the probe towardai1uo~~centept 1i~h~ DisplaY-will be 7lOQ~1 on 60 Hz 6000 plusmn 1 on50 Hz

The bulbintbeMODEL 1021 prob~ is GE 222x (ourpart number lO-01STo r~pa~e remove the tWoAllens~e~sfromthe Jar~e endof the probe~the lamp sqcket- can Il9wbe removed Talce9~H~ebumed-ouibUlb and replaltcent ii~ Reverse~e pro~ess t()re~~eI)1bletheprobe middotTakecare that thtfbulb mcentered in its h i1A middotmiddotbullmiddotmiddotbullmiddot middotbullmiddotbullbull i middot e middot middot o uer

bull ~liduldmaj9ri~~fvice become ne~ary please pack the inshystr~lnent securelYaJJ~s1liP it to us With a description ofthe proshyblenr encouIitered~ UsemiddotJJPSmiddotprepaid when shipping

MITEK _ ~ - lt 7tmiddot ~~

~MANS~IELDamp Gilf-EN DIVISION 860() SOMERSET DRIVE LARGO Fl 34643

TELEiHON~(813)~36-7s31

0

__-~_ - --__ ----~_ __ __ ~ ~

bull ~ ~ bullbull ltgt bullbullbull ltgt0 0

middotfL

L SERIESmiddot1-00OPERATIN~middot INSJRUCTIONS~middot

MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

L bull Fieci120VAC 15A~u~tWod~plex receptacles bull ~12OVAC single-pJiase2-~lOA bull FiX~208120VAC~phase 4-wire15A bull VariabJe 0 ~ 24oI14QVAC8-~i~~9A

f bull -Vari8bleO ~ 150vnQ-i~(lA isolated l~RMS L bull Variable 0 ~ 125VDCt 5Q -isolated ItlmiddotRMS middot

OPEBATIONTouSe the powermiddotpanelt (lISt tum ON ~MAIN AC circuit breaker~i This will m~tethemain AC pnot Hght and 9nergize the four-pin ~Pyen~i supplying fix~208120VAOtliree-phase poWer Th~ other 1ixed~d~Je sulpHes may

l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

cuit ~~ (both ~ ~ncl BEc) A clockwise lOtation of the vol~cpntro1 -- ~ ~eause ~~~~the voltage a~ble at the appropriate 1~Ptashy

L I tNOTE ~~ ~~ltage oo~~lbob fOr the 0-208120V three-phase sUpply is ~ted at the ~nd or the

housbigmiddotmiddotmiddotmiddot r L

IfanY~r~es11PplifSri-e~vefloaded one or more circuit breakers may trip middotOFF Al- ir ways turnthemiddotVariable suppllesto zero and remove the C8usaopound the oyerload before resetshy

JL ting the circuitmiddotl~~em

A pindiilg ~ groun4 oenn~oDis proVided at each end or the panel fOrgrounding the rotating macbin~

ENGINEERING CORPORATION -----MANUFACTURERS OF eciuaPMENT R)R EOUCAT1ON AND INDUSTRV bull

PO Box 563 East ~ow IdA 91028 (413) S25-S9ff1 bull nx 95-5426 bull Fax (41~) S2S-4141

[

Page 42: [1 Table D. - UTKweb.eecs.utk.edu/~jsl/ECE325/ECE325-LabManual.pdfLab #2 Load-Speed Characteristic of a DC Motor . Objective . The objective of . this . lab is to . detennine the load-speed

bull ~ ~ bullbull ltgt bullbullbull ltgt0 0

middotfL

L SERIESmiddot1-00OPERATIN~middot INSJRUCTIONS~middot

MoDEL HMS-100-PP-3 POWERPANEl MODEL ~PS~1()~P3 POWER PANEL

f ~e HAMPDEN Model HMB-lOO-PP-8is electrlca1lYoidentical to Mod~ BPs~ooshyGENERAL q~ PP~lhedifferenceisinthe dbi1~O~9r tbebousings Facb P9wer panel

consists of ~9US power supplieS rated foruSe withHampc1mi ~lgtO~shytionailio~ machines and tor ieneral1abarato1Y~Pp1i~DSmiddotmiddot ~put poWerL ol208120Y ampfI 4Wisthro1gh a twist-lock poW~ccmlsuPp1iedwitJ1 the unit Th~rQllowing~t-b~protectedvoltage souroesareavai1ab1er

L bull Fieci120VAC 15A~u~tWod~plex receptacles bull ~12OVAC single-pJiase2-~lOA bull FiX~208120VAC~phase 4-wire15A bull VariabJe 0 ~ 24oI14QVAC8-~i~~9A

f bull -Vari8bleO ~ 150vnQ-i~(lA isolated l~RMS L bull Variable 0 ~ 125VDCt 5Q -isolated ItlmiddotRMS middot

OPEBATIONTouSe the powermiddotpanelt (lISt tum ON ~MAIN AC circuit breaker~i This will m~tethemain AC pnot Hght and 9nergize the four-pin ~Pyen~i supplying fix~208120VAOtliree-phase poWer Th~ other 1ixed~d~Je sulpHes may

l theJibemiddotenergized~~ as required In each case a pilotlipt indicates th$edition

When en eipmg the va11middota1gtIemiddot~UPPliesJt fIrSt ~tate theVoItagecqntrol Obmiddotmiddotmiddotto etho extreme COW (minimum oufput) middotposition Then turn ON- the a~ bull te cirshy

cuit ~~ (both ~ ~ncl BEc) A clockwise lOtation of the vol~cpntro1 -- ~ ~eause ~~~~the voltage a~ble at the appropriate 1~Ptashy

L I tNOTE ~~ ~~ltage oo~~lbob fOr the 0-208120V three-phase sUpply is ~ted at the ~nd or the

housbigmiddotmiddotmiddotmiddot r L

IfanY~r~es11PplifSri-e~vefloaded one or more circuit breakers may trip middotOFF Al- ir ways turnthemiddotVariable suppllesto zero and remove the C8usaopound the oyerload before resetshy

JL ting the circuitmiddotl~~em

A pindiilg ~ groun4 oenn~oDis proVided at each end or the panel fOrgrounding the rotating macbin~

ENGINEERING CORPORATION -----MANUFACTURERS OF eciuaPMENT R)R EOUCAT1ON AND INDUSTRV bull

PO Box 563 East ~ow IdA 91028 (413) S25-S9ff1 bull nx 95-5426 bull Fax (41~) S2S-4141

[