type ar auxiliary relay high speed instruction leaflet · 2018-05-09 · ar high speed auxiliary...

41-759LAR High Speed Auxiliary Relay

The target is reset from the outside of the case by apush-rod located at the bottom of the cover.

The front spring, in addition to holding the target, pro-vides restraint for the armature and thus controls thepickup value of the switch.

3.0 CHARACTERISTICSThe AR unit without a series resistor has a sensitivityof 500 milliwatts. By the proper combination of theAR unit and a series resistor, an optimum speed of 2milliseconds can be obtained for an energy input of10 watts.

Typical operating times and effective contact bounceare outlined in the Tables 1 and 2.

All relays are capable of being energized continu-ously. All high speed relays will pick up at 80% ofrated voltage or less; and drop out at 5% of ratedvoltage or higher.

Relays with delayed dropout are available with a min-imum dropout time of 0.1 second and also availablewith a minimum dropout time of 0.2 seconds.

3.1 CONTACT RATING (Table 3)

Each relay contact is rated 3 amps continuous and30 amps long enough to trip a breaker.

Table 1:

Operate and Reset Times

RatedOperating

†

Energy(Watts)

† 2.25 W AR is a different style than the 10W AR

Operate Time(Milliseconds)

ResetTime

(Milliseconds)

NoContactCloses

NCContactOpens

NCContactCloses

102.25

2.03.5

1.52.5

4.03.5

Table 2:

Contact Bounce

ContactLoading

Effective BounceTime in

Milliseconds

NormallyOpen

NormallyClosed

Dry Circuit10 Watt (One AR Relay)Breaker Trip Coil

21

.2

6 - 8- - - -

Table 3:

Contact Rating

ContactCircuitVolts

dc

Interrupting Rating (Amps) Carry Rating (Amps)

ResistiveInductiveL/R = .005

ContinuousSingle Double Single Double

48125250

3.7500.5000.250

20.01.70.5

1.7500.3500.150

20.01.20.250

333

2


4.0 SETTINGS

4.1 AR UNIT

No settings are required.

4.2 OPERATION INDICATORS (OI)

The only setting required on the OI is the selection ofthe 0.2 or 2.0 ampere tap setting. This selection ismade by connecting the lead located in front of thetap block to the desired setting by means of the con-necting screw.

5.0 INSTALLATIONThe relays should be mounted on switchboard pan-els or their equivalent in a location free from dirt,moisture, excessive vibration, and heat. Mount therelay vertically by means of the four mounting holeson the flange for a semi-flush mounting or by meansof the rear mountings stud or studs for projectionmounting. Either a mounting stud or the mountingscrews may be utilized for grounding the relay. Theelectrical connections may be made directly to theterminals by means of screws for steel panel mount-ing or to the terminal studs furnished with the relayfor thick panel mounting. The terminal studs may beeasily removed or inserted by locking two nuts on thestud and then turning the proper nut with a wrench.

For detailed FT case information refer to I.L. 41-076.

6.0 ADJUSTMENTS AND MAINTENANCE

The proper adjustments to insure correct operation ofthis relay have been made at the factory and shouldnot require readjustment after receipt by the cus-tomer. If the adjustments have been changed or therelay taken apart for repairs, the calibration instruc-tions below should be followed.

6.1 ACCEPTANCE CHECK

The following check is recommended to insure thatthe relay is in proper working order.

Contact Gaps

a. Normally open contacts should have a gapof .018 to .023 inch.

b. Normally closed contact gap should be .013minimum.

Contact Pressure

a. On four normally open contact relays, thenormally open contacts should have approxi-mately 4 grams pressure on the card in thede-energized position, and 15 to 30 gramscontact pressure in the energized position.

b. On relays with two normally open and twonormally closed contacts, the normallyclosed contacts should have approxi-mately 15 grams contact pressure in thede-energized position.

Each normally open contact spring shouldhave approximately 8 grams pressureagainst the card.

NOTE: For this check to be made accurately, it is necessary to

back out the NC stationary contact screw. This will disturb the fac-

tory calibration and therefore it is recommended this check not be

made on a relay which passes all other checks.

Armature Gap

The armature gap should be approximately .009inches measured at the narrowest part of the arma-ture gap.

Contact Operate Time

Per Table 1.

Operation Indicator (OI)

Close the main relay contacts and pass sufficient dccurrent through the circuit to drop the OI. This valueof current should be not greater than the particular OItap setting being used. The operation indicator targetshould drop freely.

6.2 SPECIAL AR RELAY WITH TIME DELAY DROPOUT

Connect the relay as shown in Figure 16 page 12.When the AR coil has been energized for 25-35 milli-seconds its dropout time should be a minimum of100 milliseconds. The AR relay should be adjustedsuch that its contact break time is 25-35 milliseconds.Also the timer should be of the type which may bestarted and stopped by break contacts.

6.3 AR RELAYS WITH TIME DELAY DROPOUT

Connect the relay as shown in Figure 17 page 13.When the AR coil has been energized approximately3 cycles, (40 millisecond or longer) the dropout time

3


should be a minimum of 100 milliseconds or thedropout time should be a minimum of 200 millisec-onds depending upon the relay style.

7.0 CALIBRATIONUse the following procedure for calibrating the relay ifthe relay has been taken apart for repairs or theadjustments disturbed. This procedure should not beused until it is apparent that the relay is not in properworking order. (See “Acceptance Check”, page 3)

7.1 TRIPPING RELAY (AR)

The type AR tripping relay unit has been properlyadjusted at the factory to insure correct operation,and under normal field conditions should not requirereadjustment. If, however, the adjustments are dis-turbed in error, or it becomes necessary to replacesome part, use the following adjustment procedure.This procedure should not be used until it is apparentthat the relay is not in proper working order.

a. Adjust the set screw at the rear of the top ofthe frame to obtain a 0.009-inch gap at therear end of the armature air gap.

b. On the four normally open contact relayadjust each contact spring to obtain 4 gramspressure at the very end of the spring. Thispressure should be sufficient to move thespring away from the edge of the slot of thecard.

On the two normally open two normallyclosed contact relay, adjust each normally

open contact spring for 8 grams to just movethe contact away from the card. Adjust thenormally closed contact for 15 grams springpressure, to just move contact spring awayfrom the card. Then adjust the stationarycontact to just move the contact spring awayfrom the card. For this check to be madeaccurately, it is necessary to back out theNC stationary contact screw. This willdisturb the factory calibration and there-fore it is recommended this check not bemade on a relay which passes all otherchecks.

c. Adjust each normally open stationary contactscrew to obtain a contact gap of 0.020 to0.022 inches. Energize the relay and the nor-mally open contacts should have 15 to 30grams contact pressure. The normallyclosed, if any, should have a contact gap of.015 inches.

When calibrated as outlined above, the relayshould meet the characteristics of Tables 1 and 2.

8.0 RENEWAL PARTS

Repair work can be done most satisfactorily at thefactory. However, interchangeable parts can be fur-nished to the customers who are equipped for doingrepair work. When ordering parts, always give thecomplete nameplate data.

4


1

4

6

3 52

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atio

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23

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Arm

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re G

ap

Fig

ure

1.T

ype

AR

Uni

t with

2 M

ake

– 2

Bre

ak C

onta

cts

(Fro

nt V

iew

).F

igur

e 2.

Typ

e A

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nit w

ith 2

Mak

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ide

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w).

5

41-759L

6

AR High Speed Auxiliary Relay

Sub

462

9A49

6S

ub

283

7A11

3

Fig

ure

3.In

tern

al S

chem

atic

of t

he T

ype

AR

Rel

ay w

ith 4

Mak

e C

onta

cts

in

FT

-11

Cas

e.F

igur

e 4.

Inte

rnal

Sch

emat

ic o

f the

Typ

e A

R R

elay

with

2 M

ake

– 2

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ak

Con

tact

s in

FT

-11

Cas

e.


*Su

b 5

629

A49

5S

ub 2

762A

529

Fig

ure

5.In

tern

al S

chem

atic

of t

he T

ype

AR

Rel

ay in

FT

-22

Cas

e, D

oubl

e U

nit,

with

8 M

ake

Con

tact

s.F

igur

e 6.

Inte

rnal

Sch

emat

ic o

f the

Typ

e A

R R

elay

in F

t-22

Cas

e, D

oubl

e U

nit,

with

6 M

ake

– 2

Bre

ak C

onta

cts.

7

41-759L

8


*Sub

476

2A58

0*S

ub 4

629A

899

Fig

ure

7.In

tern

al S

chem

atic

of t

he T

ype

AR

Rel

ay in

Ft-

22 C

ase,

Dou

ble

Uni

t, w

ith 4

Mak

e –

4 B

reak

Con

tact

s.F

igur

e 8.

Inte

rnal

Sch

emat

ic o

f the

Typ

e A

R R

elay

in F

ront

Con

nect

ed M

olde

d C

ase

with

4 M

ake

Con

tact

s.


*Sub

483

7A11

2S

ub 2

836A

646

Fig

ure

9.In

tern

al S

chem

atic

of t

he T

ype

AR

Rel

ay in

Fro

nt C

onne

cted

Mol

ded

Cas

e w

ith 2

Mak

e –

2 B

reak

Con

tact

s.F

igur

e 10

.In

tern

al S

chem

atic

of t

he T

ype

AR

Rel

ay in

the

Ft-

11 C

ase

with

2

Ope

ratio

n In

dica

tors

.

9

41-759L

10


Sub

383

6A91

7S

ub 3

836A

859

Fig

ure

11.

Inte

rnal

Sch

emat

ic o

f the

Typ

e A

R R

elay

with

2 M

ake

– 2

Bre

ak

Con

tact

s in

Mol

ded

Cas

e.F

igur

e 12

.In

tern

al S

chem

atic

of t

he T

ype

AR

Rel

ay w

ith 4

Mak

e C

onta

cts

in

Mol

ded

Cas

e.


Sub 4836A840

Figure 13. Internal Schematic of the Type AR Relay in the FT-11 Case with Time Delay Dropout.

Sub 1

3500A06

Figure 14. Internal Schematic of the Type AR Auxiliary Tripping Relay with Time Delay on Dropout in FT-11 Case, 125 Vdc.

11

41-759L

12


NO

TE

S:

1. A

rel

ay m

ust b

e se

t suc

h th

at th

e br

eak

cont

acts

ope

n in

25-3

5 m

illis

econ

ds.

2. T

imer

mus

t be

able

to b

e st

arte

d by

con

tact

bre

ak a

ndst

oppe

d by

con

tact

bre

ak.

*Sub

335

30A

29S

ub 2

836A

744

Fig

ure

15.

Inte

rnal

Sch

emat

ic o

f the

Typ

e A

R R

elay

in T

ype

FT

-22

Cas

e w

ith

Tim

e D

elay

on

Rel

ease

, 6 m

ake

– 2

Bre

ak C

onta

cts.

Fig

ure

16.

Tes

t Con

nect

ions

for

the

Spe

cial

Typ

e A

R R

elay

with

Tim

e D

elay

on

Dro

pout

.


Sub

135

31A

10

Fig

ure

17.

Tes

t Con

nect

ions

for

the

Spe

cial

Typ

e A

R R

elay

with

Tim

e D

elay

on

Dro

pout

13

41-759L

14


Sub

2

836A

753

Fig

ure

18.

Ext

erna

l Sch

emat

ic o

f the

Typ

e A

R R

elay


Sub 2836A991

Figure 19 .Outline and Drilling Plan for the Type AR Relay in the Front Connected Molded Case.

15


IF RELAY IS MOUNTED UNDERANOTHER DEVICE EXTENDINGAPPROX. SAME DISTANCE FROMPANEL, ALLOW 5/16” MINIMUMSPACING TO PERMIT REMOVAL OF COVER

Sub 5182A904

Figure 2 0 .Type AR Relay – Molded Base, Rear Connected Outline and Drilling Plan

16


*Sub 2057D7900

Figure 21. Outline and Drilling Plan for the Type AR Relay in the Ft-11 Case.

17


*Sub 14183A158

Figure 22. Outline and Drilling Plan for the Type AR Relay in the FT-22 Case.

18

41-759L

19


NOTES

ABB Inc.4300 Coral Ridge DriveCoral Springs, Florida 33065Telephone: +1 954-752-6700Fax: +1 954-345-5329www.abb.com/substation automation

IL 4

1-75

9 - R

evis

ion

L

ABB

type ar auxiliary relay high speed instruction leaflet · 2018-05-09 · ar high speed auxiliary...

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