single phase transformer turns-ratio meters user’s manual · this manual applies to both the...

ATRT-01 S3 and ATRT-01B S3 SINGLE PHASE TRANSFORMER TURNS-RATIO METERS

USER’S MANUAL

Vanguard Instruments Company, Inc. 1520 S. Hellman Ave. Ontario, California 91761, USA

TEL: (909) 923-9390 FAX: (909) 923-9391

March 2014 Revision 1.2

ATRT-01/01B S3 USER’S MANUAL REV 1

i

SAFETY SUMMARY

This manual applies to both the ATRT-01 S3 and ATRT-01B S3 current transformer turns-ratio meters. The operating procedures are virtually the same for both models, and any differences are clearly described where applicable.

FOLLOW EXACT OPERATING PROCEDURES Any deviation from procedures described in this User’s Manual may create one or more safety hazards, damage the ATRT-01/01B S3, damage the test transformer, or cause errors in the test results. Vanguard Instruments Company, Inc. assumes no liability for unsafe or improper use of the ATRT-01/01B S3.

SAFETY WARNINGS AND CAUTIONS The ATRT-01/01B S3 shall be used only by trained operators. All transformers under test shall be off-line and fully isolated. Do not perform test procedures or service unless another person is also present who is capable of rendering aid and resuscitation.

MAINTENANCE AND REPAIR To avoid the risk of introducing additional or unknown hazards, do not install substitute parts or perform any unauthorized modification to any ATRT-01/01B S3 test unit. To ensure that all designed safety features are maintained, repairs and maintenance must be performed only by Vanguard Instruments Company factory personnel or by an authorized repair service provider. Unauthorized modifications can cause safety hazards and will void the manufacturer’s warranty.

WARNING Do not remove test leads during a test. Failure to heed this warning can result in electrical shock to personnel and damage to the equipment.

POWER SUPPLY Always connect the ATRT-01/01B S3 to an AC receptacle with protective ground.

Always check the voltage setting of the unit before plugging in to power. Failure to heed this warning may damage the device.

REPLACEMENT FUSES The ATRT-01/01B S3 uses a 250V/3A Fast Blow fuse (F3A 250V).

ACCESSORIES AND REPLACEMENT PARTS The ATRT-01/01B S3 must be used with genuine Vanguard cables and accessories.

REV 1 ATRT-01/01B S3 USER’S MANUAL

ii

TABLE OF CONTENTS CONVENTIONS USED IN THIS DOCUMENT ..................................................................................... 1 1.0 INTRODUCTION .................................................................................................................... 2

1.1 General Description and Features ................................................................................... 2 1.2 Technical Specifications ................................................................................................... 4

1.2.1. ATRT-01 S3 Technical Specifications ........................................................................ 4 1.2.2. ATRT-01B S3 Technical Specifications ...................................................................... 5 1.2.3. Controls and Indicators ............................................................................................ 6

2.0 PRE-TEST SETUP ................................................................................................................... 9 2.1 ATRT-01 S3 Operating Voltage ......................................................................................... 9 2.2 ATRT-01B S3 Operating Power ........................................................................................ 9 2.3 LCD Screen Contrast Control ............................................................................................ 9

3.0 OPERATING PROCEDURES ................................................................................................. 10 3.1 ATRT Transformer Connection Diagrams ...................................................................... 10 3.2 Setting the Test Voltage ................................................................................................. 14 3.3 Setting the Date and Time ............................................................................................. 16 3.4 Setting the Interface Language ...................................................................................... 17 3.5 Setting the Frequency (ATRT-01B S3 Only) .................................................................... 18 3.6 Performing Tests ............................................................................................................ 19

3.6.1. Entering Test Record Header Information ............................................................. 19 3.6.2. Testing a Single Phase Transformer ....................................................................... 23 3.6.3. Testing a Three Phase Transformer ....................................................................... 28

3.7 Working With Test Records ........................................................................................... 36 3.7.1. Viewing the Contents of the Working Memory ..................................................... 36 3.7.2. Saving Test Results to a Test Record ...................................................................... 37 3.7.3. Restoring a Test Record From Flash EEPROM ........................................................ 39 3.7.4. Restoring a Test Record From a USB Flash Drive ................................................... 43 3.7.5. Copying Test Records to a USB Flash Drive ............................................................ 46 3.7.6. Viewing the Test Record Directory ......................................................................... 49 3.7.7. Erasing Test Records from the Flash EEPROM ....................................................... 51 3.7.8. Erasing Test Records from a USB Flash Drive ......................................................... 56

3.8 Using the Turns Ratio Calculator ................................................................................... 59 APPENDIX A – TRANSFORMER VECTOR GROUP CODES ............................................................... 62 APPENDIX B – Common ANSI Transformer Descriptions ............................................................. 63 APPENDIX C – CEI/IEC 60076-1 Transformer Descriptions ........................................................... 71 APPENDIX D – Australian Std.2374 Transformer Descriptions ..................................................... 78


iii

LIST OF TABLES Table 1. ATRT-01 S3 Technical Specifications ................................................................................. 4 Table 2. ATRT-01B S3 Technical Specifications ............................................................................... 5 Table 3. Functional Descriptions of ATRT-01 S3 Controls and Indicators ...................................... 7 Table 4. Functional Descriptions of ATRT-01B S3 Controls and Indicators .................................... 8

LIST OF FIGURES Figure 1. ATRT-01 S3 Controls and Indicators ................................................................................ 7 Figure 2. ATRT-01B S3 Controls and Indicators .............................................................................. 8 Figure 3. Typical Single-Phase Transformer Connection .............................................................. 10 Figure 4. Typical Auto Transformer Connection ........................................................................... 11 Figure 5. Typical CT Connection .................................................................................................... 12 Figure 6. Typical Bushing CT Connection on a Single Transformer .............................................. 13

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1.0 INTRODUCTION 1.1 General Description and Features The ATRT-01 S3 is Vanguard’s fourth generation, micro-processor based, single phase, automatic transformer turns-ratio tester. This portable test unit is available in two models, the ATRT-01 S3 (line power only), and the ATRT-01B S3 (rechargeable-battery powered).

The ATRT-01 S3 uses the IEEE C57.12.90 measuring method to determine the transformer turns-ratio. The transformer turns-ratio is determined by precisely measuring the voltages across the unloaded transformer windings. The ATRT-01 S3’s measuring circuitry self adjusts before each measurement to ensure turns-ratio accuracy. Two selectable test voltages, 4Vac and 40Vac, offer flexibility in testing different types of transformers.

The ATR-01 S3 can measure turns-ratios ranging from 0.8 to 15,000 and can be used to test voltage regulators, power transformers, current transformers (CT), and potential transformers (PT). The ATRT-01 S3 also measures and displays transformer-winding excitation current, winding polarity, and winding phase angle. Test results are displayed on a back-lit LCD screen (128 x 64 pixels) that is viewable in bright sunlight and low-light conditions.

In addition to measuring a transformer’s turns-ratio, the transformer’s name plate voltages can also be entered, and the ATRT-01 S3 will then display the turns-ratio percentage error. This convenient feature eliminates any user-calculation errors when testing transformers.

When testing a 3-phase transformer, the ATRT-01 S3 provides connection information (H and X test leads to the transformer bushings) for phase A, B and C tests. The three phase test results (turns-ratio, excitation current, winding polarity, phase-angle, and percentage error) are displayed on the LCD screen.

User Interface The ATRT-01 S3 features a back-lit LCD screen (128 x 64 pixels) that is viewable in direct sunlight and low-light levels. A rugged 16-key membrane keypad is used to enter test information and to operate the unit.

Test Record Storage The ATRT-01 S3 can store 128 records of 33 readings internally, and up to 999 test records on an external USB Flash drive. Test records can be recalled using the included Transformer Analysis PC software.

Computer Interface A Windows®-based (XP/Vista/7) Transformer Analysis Software is provided with each unit and can be used to remotely control the ATRT-01 S3 via the RS-232C port. Using the Transformer Analysis software, the user can retrieve test records (from the ATRT-01 S3’s memory or a USB Flash drive), analyze test results, and print test results on a desktop printer. Test results are automatically exported to PDF, Excel, and XML formats.


3

Battery Power for Exceptional Portability The ATRT-01B S3 is powered by a 6-volt, 7 ampere-hour, lead acid battery. This high capacity battery, coupled with the ATRT-01B S3’s low power consuming circuitry, allows the unit to be used continuously for up to 4 hours per charge. A built-in charger allows the unit to be used during charging.

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6

1.2.3. Controls and Indicators The ATRT-01 S3 and ATRT-01B S3 controls and indicators are shown in Figure 1 and Figure 2, respectively. A leader line with an index number points to each control and indicator, which is cross-referenced to a functional description in the corresponding table. The purpose of the controls and indicators may seem obvious, but users should familiarize themselves with them before using the ATRT. Accidental misuse of the controls will usually cause no serious harm. Users should also familiarize themselves with the safety summary information found on the front page of this User’s Manual.


7

Figure 1. ATRT-01 S3 Controls and Indicators

Table 3. Functional Descriptions of ATRT-01 S3 Controls and Indicators

Item Number Panel Markings Functional Description

1 USB MEM USB Flash drive interface 2 RS-232C RS-232C computer interface port

3 Back-lit LCD screen (128 x 64 pixels), viewable in direct sunlight and low light levels

4 H and X lead connector (16-pin male). 5 Voltage selection switch

6 120/240 Vac, 2A, 50-60Hz Fuse: F3A250V

Input power connector and fused power switch with third-wire safety ground.

7 Rugged alpha-numeric keypad


8

Figure 2. ATRT-01B S3 Controls and Indicators

Table 4. Functional Descriptions of ATRT-01B S3 Controls and Indicators

Item Number Panel Markings Functional Description

1 USB MEM USB Flash drive interface 2 RS-232C RS-232C computer interface port

3 Back-lit LCD screen (128 x 64 pixels), viewable in bright sunlight and low light levels

4 H and X lead connector (16-pin male).

5 120-240 Vac, 2A, 50-60Hz Fuse: F3A250V

Input power connector

6 Rugged alpha-numeric keypad

7 CHARGER Battery charging indicator. LED lights up when battery is being charged.

8 POWER Power switch

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3.0 OPERATING PROCEDURES 3.1 ATRT Transformer Connection Diagrams

Figure 3. Typical Single-Phase Transformer Connection


11

Figure 4. Typical Auto Transformer Connection


12

Figure 5. Typical CT Connection


13

Figure 6. Typical Bushing CT Connection on a Single Transformer

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15

d. The voltage will be set and the following confirmation message will be displayed:

Press any key to return to the “START-UP” menu.

40 VOLTS SET


16

3.3 Setting the Date and Time To set the date and time:

a. Start from the “START-UP” menu:

Press the [2] key (SETUP).

b. The following screen will be displayed:

Press the [5] key (SET TIME)

c. The following screen will be displayed:

Type in the date using the alpha-numeric keypad. The following screen will be displayed:

Enter the time using the alpha-numeric keypad. When the time has been entered, you will be immediately returned to the “START-UP” menu.

ENTER TIME

HH:MM:SS

ENTER DATE

MM-DD-YY

1. RECORD ID 2. TEST VOLTAGE 3. PRINT RECORD 4. SAVE/RESTORE RECORD 5. SET TIME 6. SET LANGUAGE

1. TEST TRANSFORMER 2. SETUP 3. CALCULATOR

time: 14:21:34

date: 05/24/11


17

3.4 Setting the Interface Language Follow the steps below to set the interface language (English, Spanish, or Turkish):




Press the [6] key (SET LANGUAGE).


Select the preferred interface language by pressing the corresponding key on the keypad ([1], [2], or [3]). The interface language will be set and a confirmation screen will be displayed as shown below:


ENGLISH SET

1. ENGLISH 2. TURKISH 3. SPANISH



time: 14:21:34

date: 05/24/11

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19

3.6 Performing Tests 3.6.1. Entering Test Record Header Information You can enter the test record header information before performing tests. The record header includes identifying information such as the company, station, circuit, manufacturer, etc. Once the header information has been set, it will apply to all subsequent test records. Follow the steps below to enter the test header information:




Press the [1] key (RECORD ID).


Type the company name using the alpha-numeric keypad.

When pressing a key, the corresponding number on the key will be displayed first. Pressing the key again will display the first letter on the key. Pressing the key again will display the second letter on the key. For example, to type the letter “A”, you must press the [2] key twice. To erase the character at the cursor position, press the [CLEAR] key. Press the [Contrast ∧] key to move to the next character. Press the [Contrast ∨]

COMPANY:

_

↑/↓ TO POSITION "ENTER" TO ACCEPT



time: 14:21:34

date: 05/24/11


20

key to move to the previous character. Press the [ENTER] key when you are done typing the company name.

d. The following screen will be displayed:

Type the station name using the alpha-numeric keypad and then press the [ENTER] key.

e. The following screen will be displayed:

Type the circuit information using the alpha-numeric keypad and then press the [ENTER] key.

f. The following screen will be displayed:

Type the manufacturer name using the alpha-numeric keypad and then press the [ENTER] key.

MANUFACTURER:

_


CIRCUIT:

_


STATION:

_



21

g. The following screen will be displayed:

Type the transformer’s model information using the alpha-numeric keypad and then press the [ENTER] key.

h. The following screen will be displayed:

Type the transformer’s serial number using the alpha-numeric keypad and then press the [ENTER] key.

i. The following screen will be displayed:

Type the transformer’s KVA rating using the alpha-numeric keypad and then press the [ENTER] key.

KVA RATING:

_


SERIAL NUMBER:

_


MODEL:

_



22

j. The following screen will be displayed:

Type the operator’s name using the alpha-numeric keypad and then press the [ENTER] key. All header information will be saved, and you will be returned to the “START-UP” menu.

OPERATOR:

_


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prev data

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LATOR

14:21:34

05/24/11

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24

Type the H winding name plate voltage value using the numeric keypad. The screen will be updated as shown:

Press the [ENTER] key. The following screen will be displayed:

Type the X winding name plate voltage value using the numeric keypad. The screen will be updated as shown:

Press the [ENTER] key. Continue to step d.

2. NO

Press the [2] key (NO) if you do not want to enter the transformer name plate voltage. Continue to step d.

3. USE PREV DATA

Press the [3] key (USE PREV DATA) to use the name plate voltage values entered when performing the last test. Continue to step d.

NAME PLATE VOLTAGE:

H : X

500 : 10

NAME PLATE VOLTAGE:

H : X

500 : 0

NAME PLATE VOLTAGE:

H : X

500 :

NAME PLATE VOLTAGE:

H : X

0 :

REV 1 A

25

d. T

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e. T

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ATRT-01/01

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TRT-01/01B

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REV 1

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REV 1 A

27

h. T

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3.6.3. TFollow th

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NOTE

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X0 ACCES

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X

1

2

3

4

5

6

XFMR CON

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time:

date:

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g screen will

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14:21:34

05/24/11

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28

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REV 1 A

29

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NOTE

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1. YES

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Type tscreen

NAM

NAM

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1. yes

2. no

3. USE P

1. DY1 2. DY3 3. DY5 4. DY7 5. DY9 6. DY11

1B S3 USER’S

g screen will

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g screen will

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the [1] key ge values. Th

the H windinn will be upd

ME PLATE

H :

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H :

0 :

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PREV DATA) previous test

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30


Type the X winding name plate voltage value using the numeric keypad. The screen will be updated as shown:

Press the [ENTER] key. Continue to step f.

2. NO

Press the [2] key (NO) if you do not want to enter the transformer name plate voltage. Continue to step f.

3. USE PREV DATA

Press the [3] key (USE PREV DATA) to use the name plate voltage values entered when performing the last test. Continue to step f.

f. The following screen will be displayed momentarily:

Then the following screen will be displayed showing the Phase A cable connections for the selected test (this will differ depending on the test selected):

TESTING AT 40 VOLTS

NAME PLATE VOLTAGE:

H : X

500 : 10

NAME PLATE VOLTAGE:

H : X

500 : 0


31

Make the cable connections per the instructions and then press the [START] key to run the Phase A test.

g. The following screen will be displayed while the test is being performed:

The Phase A test results will be displayed on the LCD screen when testing has finished:

Press the [ENTER] key to continue.

h. The following screen will be displayed showing the Phase B cable connections for the selected test:

Make the cable connections per the instructions and then press the [START] key to run the Phase B test.

i. The following screen will be displayed while the test is being performed:

PHASE B

CABLE XFMR

X1,X2 to x2,x0

h1,h2 to h2,h1

"START" when READY

RATIO MA %DIFF

+15.003 001 0.02

"ENTER" TO CONTINUE..

TESTING:

DYN1 phase a

PHASE A

CABLE XFMR

X1,X2 to x1,x0

h1,h2 to h1,h3

"START" when READY


32

The Phase A and B test results will be displayed on the LCD screen when testing has finished:

Line 1 of the results shows the Phase A test results, and line 2 shows the Phase B test results.

Press the [ENTER] key to continue.

j. The following screen will be displayed showing the Phase C cable connections for the selected test:

Make the cable connections per the instructions and then press the [START] key to run the Phase C test.

k. The following screen will be displayed while the test is being performed:

The Phase A, B, and C test results will be displayed on the LCD screen when testing has finished:

TESTING:

DYN1 phase C

PHASE C

CABLE XFMR

X1,X2 to x3,x0

h1,h2 to h3,h2

"START" when READY

RATIO MA %DIFF

+15.003 001 0.02

+15.015 001 0.10

"ENTER" TO CONTINUE..

TESTING:

DYN1 phase B

REV 1 A

33

Trew

l. T

P

m. T

P

ATRT-01/01

he phase anesults from l

while a phase

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NOTE

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TEST

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B +15.015

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0.0° 0. XFMR TY

1B S3 USER’S

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g screen will

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NUMBER 2

EN SAVED!

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any previoust results. screen will th

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REV 1

34

save

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35



36

3.7 Working With Test Records 3.7.1. Viewing the Contents of the Working Memory Whenever a test is performed or a test record is retrieved, the data is stored in the ATRT’s working memory. You can view the test data using the steps below:




Press the [3] key (PRINT RECORD).

c. The basic test record information will be displayed as shown:

Press the [Contrast ∨] key. The test record details will be displayed as shown below:

Press the [STOP] key to return to the “START-UP” menu.

1 SINGLE PHASE

40 volts

RATIO ma %DIFF

1.003 0002 0.3

SINGLE PHASE

Num Tests: 1

05/26/11 15:33:58



time: 14:21:34

date: 05/24/11

REV 1 A

37

3.7.2. SAfter perFlash EEPperformias a newbelow toprocedurUSB Flash

a. P3

P

b. T

P

c. T

P

ATRT-01/01

Saving Tesrforming a tePROM or to ng a test, th test has not

o save the tere can also bh Drive):

erform a tes.7.4), and th

ress the [2]

he following

ress the [4]

he following

NOTE

Opcon

ress the [2]

1. RESTOR2. SAVE R3. RECORD4. ERASE 5. COPY t

1. RECORD2. TEST V

3. PRINT 4. SAVE/R5. SET TI6. SET LA


time:

date:

1B S3 USER’S

t Results test, the usera USB Flash

hey will still rt been perfost results fro

be used to re

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key (SETUP

g screen will

key (SAVE/R

g screen will

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RE RECORD

RECORD

D DIRECTO

RECORD

to THUMB

D ID

VOLTAGE

RECORD

RESTORE R

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LATOR

14:21:34

05/24/11

S MANUAL

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remain in thormed and thom the worke-save a rest

a test recorm the “STAR

).

be displaye

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be displaye

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RECORD).

D

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Record ed the optione test resultse working mhe unit has nking memorytored test re

rd to the woRT-UP” menu

d:

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d:

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n to save thes are not sav

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ecord to a ne

rking memou:

l be listed on

e test resultsed immediacan be saverned off. Folecord (the foew memory

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s to the unit’tely after d later, as lolow the step

ollowing location or t

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Flash drive is

’s

ong ps

to a

d

s


38

If a USB Flash drive is connected to the unit, continue to step d. If a USB Flash drive is NOT connected to the unit, continue to step e.


1. SAVE INTERNALLY

Press the [1] key (SAVE INTERNALLY) to save the test record to the unit’s Flash EEPROM. Continue to step e.

2. SAVE TO THUMB DRIVE

Press the [2] key (SAVE TO THUMB DRIVE) to save the test record to the connected USB Flash drive. The following screen will be displayed:




RECORD NUMBER 2

HAS BEEN SAVED!

REC_001 SAVED TO

THUMB DRIVE.

1. SAVE INTERNALLY 2. SAVE TO THUMB DRIVE

REV 1 A

39

3.7.3. RUse the smemory:

a. St

P

b. T

P

c. T

P

ATRT-01/01

Restoring asteps below :

tart from th

ress the [2]

he following

ress the [4]

he following

NOTE

Opcon

ress the [1]


1. RECORD2. TEST V3. PRINT 4. SAVE/R5. SET TI6. SET LA


time:

date:

1B S3 USER’S

a Test Recoto restore a

e “START-UP

key (SETUP

g screen will

key (SAVE/R

g screen will


key (RESTO

RE RECORD

RECORD

D DIRECTO

RECORD

to THUMB

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VOLTAGE

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RESTORE R

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LATOR

14:21:34

05/24/11

S MANUAL

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d. The following

NOTE

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1

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RESTOR

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be displaye

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the steps be

NUMBER

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TO SELECT

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RD

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AL STORAGE

be displayed:

elow.

CORD NUMB

will be display

er using the

RD

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TRT-01/01B

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alpha-nume

S3 USER’S M

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REV 1

40

that

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41

1.2. The following screen will be displayed:

Press the [1] key (YES) to display the test record.

1.3. The basic information about the restored test record will be displayed as shown:

Press the [Contrast ∨] key. The test record details will be displayed as shown:

Press the [STOP] key to return to the “START-UP” menu. The restored test record will remain loaded in the working memory.

2. SCROLL TO SELECT

Press the [2] key (SCROLL TO SELECT) to scroll through a directory of the stored test records.

2.1. The following screen will be displayed:

RECORDS DIRECTORY

"UP" TO SCROLL FWD

"DWN" TO SCROLL RVS

1 SINGLE PHASE

40 volts

RATIO ma %DIFF

1.003 0002 0.3

SINGLE PHASE

Num Tests: 1

05/27/11 15:25:57

RECORD RESTORED!

DISPLAY RECORD?

1.YES

2.NO


42

Press the [Contrast ∧] button or the [Contrast ∨] key to display the next or previous test record, respectively.

The basic test record information will be displayed as shown:

When you have located the test record that you would like to restored,

press the [ENTER] key. Continue to step 1.2 on page 41.

#1 05/25/11 09:52

SINGLE PHASE

1 TESTS


43

3.7.4. Restoring a Test Record From a USB Flash Drive Use the steps below to restore a test record from a USB Flash drive to the ATRT’s working memory:

a. Make sure the USB Flash drive containing the test record(s) is inserted in the ATRT’s USB Flash drive port (“USB MEM” port). Then start from the “START-UP” menu:



Press the [4] key (SAVE/RESTORE RECORD)


Press the [1] key (RESTORE RECORD).

1. RESTORE RECORD 2. SAVE RECORD 3. RECORD DIRECTORY 4. ERASE RECORD 5. COPY to THUMB DRIVE



time: 14:21:34

date: 05/24/11


44


Press the [2] key (THUMB DRIVE).


Type the record number that you would like to restore using the alpha-numeric keypad and then press the [ENTER] key.

f. The test record will be restored to the unit’s working memory and the following screen will be displayed:

Press the [1] key (YES) to display the restored test record.

g. The basic information about the restored test record will be displayed as shown below:

SINGLE PHASE

Num Tests: 1

05/27/11 15:25:57

REC_000 restored!

DISPLAY RECORD?

1.YES

2.NO

RESTORE THUMB DRIVE

REC_

1.INTERNAL STORAGE

2.THUMB DRIVE


45

Press the [Contrast ∨] key. The test record details will be displayed as shown below:

Press the [STOP] key to return to the “START-UP” menu. The restored test record will remain loaded in the working memory.

1 SINGLE PHASE

40 volts

RATIO ma %DIFF

1.003 0002 0.3


46

3.7.5. Copying Test Records to a USB Flash Drive Use the steps below to copy one or all test records from the unit’s Flash EEPROM to a connected USB Flash drive:

a. Make sure a USB Flash drive is connected to the unit’s “USB MEM” port, and then start from the “START-UP” menu:



Press the [4] key (SAVE/RESTORE RECORD).


Press the [5] key (COPY TO THUMB DRIVE).




time: 14:21:34

date: 05/24/11


47


1. COPY SINGLE RECORD

Press the [1] key (COPY SINGLE RECORD) to copy a single test record from the ATRT’s Flash EEPROM to the connected USB Flash drive. The following screen will be displayed:

Type the record number using the alpha-numeric keypad and then press the [ENTER] key. The test record will be copied to the USB Flash drive and the following screen will be displayed:


REC_000 SAVED TO THUMB DRIVE

ENTER RECORD NUMBER

TO COPY TO FLASH DRV

NUMBER:

COPY REC TO THUMB DRV

1.COPY SINGLE RECORD

2.COPY ALL RECORDS


48

2. COPY ALL RECORDS

Press the [2] key (COPY ALL RECORDS) to copy all test records from the ATRT’s Flash EEPROM to the connected USB Flash drive. All test records will be copied from the unit to the connected USB Flash drive. The following screen will be displayed when the process is finished:


ALL RECORDS HAVE BEEN

TRANSFERRED TO THUMB

DRIVE!

REV 1 A

49

3.7.6. VUse the sFlash EEP

a. St

P

b. T

P

c. T

P

ATRT-01/01

Viewing thesteps below PROM memo

tart from th

ress the [2]

he following

ress the [4]

he following

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time:

date:

1B S3 USER’S

e Test Recoto browse t

ory:

e “START-UP

key (SETUP

g screen will

key (SAVE/R

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key (RECOR

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14:21:34

05/24/11

S MANUAL

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d:

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d:

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RY).

he test recor

sted only if

rds stored in

a USB Flash

the ATRT’s

drive is


50


Press the [Contrast ∧] or [Contrast ∨] key to scroll through the test record directory. The test record header will be displayed as shown:

You can continue to scroll through the record directory by pressing the [Contrast ∧] and [Contrast ∨] keys. Press the [STOP] key to return to the “START-UP” menu.

SINGLE PHASE

Num Tests: 1

05/27/11 15:25:57

RECORDS DIRECTORY

"UP" TO SCROLL FWD

"DWN" TO SCROLL RVS


51

3.7.7. Erasing Test Records from the Flash EEPROM Follow the steps below to erase test records from the Flash EEPROM






Press the [4] key (ERASE RECORD).




time: 14:21:34

date: 05/24/11

d. T

1

he following

NOTE

If yfoll

PreThe

Con

. ERASE SIN

Press the internal F

1. ENTER

Press you w

E

1.ENTE

2.SCRO

1

2

1

2

ERA

1.ERASE

2.ERASE

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53

ATRT-01/01

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54

2. SCROLL TO SELECT

Press the [2] key (SCROLL TO SELECT) to scroll through the test record directory and locate the test record that you would like to erase. The following screen will be displayed:

Press the [Contrast ∧] or [Contrast ∨] key to scroll through the test record directory. The test record header will be displayed as shown:

You can continue to scroll through the record directory by pressing the [Contrast ∧] and [Contrast ∨] keys. Once you have located the test record you would like to erase, press the [ENTER] key. The selected test record will be erased and the following screen will be displayed:

Press any key to continue. You will be returned to the beginning of step d.

RECORD NUMBER 9

ERASED!

SINGLE PHASE

Num Tests: 1

05/27/11 15:25:57

RECORDS DIRECTORY

"UP" TO SCROLL FWD

"DWN" TO SCROLL RVS


55

2. ERASE ALL RECORDS

Press the [2] key (ERASE ALL RECORDS) to erase all the test records from the unit’s internal Flash EEPROM. The following warning screen will be displayed:

You can press the [STOP] key to cancel the process and return to the “START-UP” menu.

Press the [ENTER] key to proceed with deleting all the test records from the unit’s Flash EEPROM. The following screen will be displayed during the erasure process:

The following screen will be displayed when all test records have been completely erased:


RECORDS ERASED!

ERASing recordS

PLEASE WAIT...

ERASE ALL RECORDS!

ARE YOU SURE?

"ENTER" To CONTINUE.


56

3.7.8. Erasing Test Records from a USB Flash Drive Follow the steps below to erase test records from a USB Flash drive:

a. Make sure a USB Flash drive is connected to the unit’s “USB MEM” port, and then start from the “START-UP” menu:





Press the [4] key (ERASE RECORD).


Press the [2] key (ERASE THUMB DRV REC).

1.ERASE INTERNAL REC

2.ERASE THUMB DRV REC




time: 14:21:34

date: 05/24/11


57


1. ERASE SINGLE REC.

Press the [1] key (ERASE SINGLE REC.) to erase a single test record from the connected USB Flash drive. The following screen will be displayed:

Type the record number that you would like to erase using the alpha-numeric keypad and then press the [ENTER] key. The test record will be erased from the USB Flash drive and the following screen will be displayed:

Press any key to continue. You will be returned to the beginning of step e. Press the [STOP] key to return to the “START-UP” menu.

2. ERASE ALL RECORDS

Press the [2] key (ERASE ALL RECORDS) to delete all test records from the connected USB Flash drive. The following warning screen will be displayed:

ERASE ALL THUMB DRIVE

RECORDS!

ARE YOU SURE?

"ENTER" TO CONTINUE.

THUMB DRIVE RE000

ERASED!

ERASE THUMB DRIVE

REC_

ERASE RECORD

1.ERASE SINGLE REC.

2.ERASE ALL RECORDS

"STOP" TO EXIT


58

Press the [STOP] key if you do not want to erase all the test records. You will be returned to the “START-UP” menu.

Press the [ENTER] key to proceed with deleting all the test records from the connected USB Flash drive. The following screen will be displayed when all the records have been erased:


all thumb drive

records erased!

REV 1 A

59

3.8 UThe ATRTturns ratplate voltturns rat

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60


1. YES

Press the [1] key (YES) if H0 is accessible. The following screen will be displayed:

Select the transformer configuration by pressing the corresponding key. Continue to step d.

2. NO

Press the [2] key (NO) if H0 is not accessible. The following screen will be displayed:

Select the transformer configuration by pressing the corresponding key. Continue to step d.

1. YD1 2. YD3 3. YD5 4. YD7 5. YD9 6. YD11

1. YND1 2. YND3 3. YND5 4. YND7 5. YND9 6. YND11

H0 accessible?

1. YES 2. NO


61

d. The following screen will be displayed

Type the H name plate voltage value using the keypad. The screen will be updated:


Type the X name plate voltage using the keypad. The screen will be updated:

Press the [ENTER] key. The ratio will be calculated and displayed at the bottom of the screen:


NAME PLATE VOLTAGE:

H : X

1,734 : 100

RATIO = 15.017

NAME PLATE VOLTAGE:

H : X

1,734 : 100

NAME PLATE VOLTAGE:

H : X

1,734 : 0

NAME PLATE VOLTAGE:

H : X

1,734 :

NAME PLATE VOLTAGE:

H : X

0 :


62

APPENDIX A – TRANSFORMER VECTOR GROUP CODES Utility power transformers manufactured in accordance with IEC specifications have a Rating Plate attached in a visible location. This plate contains a list of the transformer's configuration and operating specifications. One such rating is the winding configuration and phase-displacement code. This code follows a convention that comprises letter and number sets that denote three-phase winding configurations (i.e., Wye, delta, or zig-zag). Letter symbols for the different windings are noted in descending order of their rated voltages. That is, symbols denoting higher voltage ratings will be in upper-case letters and symbols denoting lower or intermediate voltage ratings will be in lower-case letters. If the neutral point of either a wye or zig-zag winding is brought out, the indication will be an N (high voltage) or n (lower voltage). The end numeral is a 300 multiplier that indicates phase lag between windings.

Accordingly, the following standard practice applies:

Wye (or star) = Y (high voltage) or y (low voltage)

Delta = D (high voltage) or d (low voltage)

Zig-zag = Z (high voltage) or z (low voltage)

For example, Dyn11 decodes as follows:

D indicates that the high-voltage windings are connected in a Delta configuration

(Since delta windings do not have a neutral point, the N never appears after a D).

y indicates that the lower voltage winding is in a wye (or star) configuration.

n indicates that the lower voltage windings have the neutral point brought out.

11 indicates a phase-displacement lag of 330 degrees between the Wye and the Delta winding.


63

APPENDIX B – Common ANSI Transformer Descriptions


64


65


66


67


68


69


70


71

APPENDIX C – CEI/IEC 60076-1 Transformer Descriptions


72


73


74


75


76


77


78

APPENDIX D – Australian Std.2374 Transformer Descriptions


79


80


81


82


83


84

1520 S. Hellman Ave • Ontario, CA 91761 • USA

Phone: 909-923-9390 • Fax: 909-923-9391 www.vanguard-instruments.com

Copyright © 2014 by Vanguard Instruments Company, Inc.

ATRT-01/01B S3 User’s Manual • Revision 1.2 • March 18, 2014 • TA

single phase transformer turns-ratio meters user’s manual · this manual applies to both the...

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