Vanguard ATRT-01-01B S3 User Manual

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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

May 2011

Revision 1

ATRT-01/01B S3 USER’S MANUAL REV 1

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.

DO NOT MODIFY TEST EQUIPMENT

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, it is highly recommended that repairs 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.

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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 ........................................................................................... 35

3.7.1. Viewing the Contents of the Working Memory ..................................................... 35

3.7.2. Saving Test Results to a Test Record ...................................................................... 36

3.7.3. Restoring a Test Record From Flash EEPROM ........................................................ 38

3.7.4. Restoring a Test Record From a USB Flash Drive ................................................... 42

3.7.5. Copying Test Records to a USB Flash Drive ............................................................ 45

3.7.6. Viewing the Test Record Directory ......................................................................... 48

3.7.7. Erasing Test Records from the Flash EEPROM ....................................................... 50

3.7.8. Erasing Test Records from a USB Flash Drive ......................................................... 55

3.8 Using the Turns Ratio Calculator ................................................................................... 58

APPENDIX A – TRANSFORMER VECTOR GROUP CODES ............................................................... 61

APPENDIX B – Common ANSI Transformer Descriptions ............................................................. 62

APPENDIX C – CEI/IEC 60076-1 Transformer Descriptions ........................................................... 70

APPENDIX D – Australian Std.2374 Transformer Descriptions ..................................................... 77

ATRT-01/01B S3 USER’S MANUAL REV 1

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

iii

REV 1 ATRT-01/01B S3 USER’S MANUAL

CONVENTIONS USED IN THIS DOCUMENT

This document uses the following conventions:

• The general term “ATRT” is used in this manual to refer to the ATRT-01 S3 and ATRT-01B S3.

A key, switch, or knob on the ATRT is indicated as [KEY], [SWITCH], [KNOB].

•

Menu names are referenced as “MENU NAME”

•

• ATRT screen output is shown as:

1. OPTION 1

2. OPTION 2

3. OPTION 3

4. OPTION 4

5. OPTION 5

• When instructions are provided, the menu item that should be selected is outlined with a

rectangle as shown below (option 3 should be selected):

1. OPTION 1

2. OPTION 2

3. OPTION 3

4. OPTION 4

5. OPTION 5

• Warning messages are indicated as:

Warning message

WARNING

• Important notes are indicated as:

Note details

NOTE

ATRT-01/01B S3 USER’S MANUAL REV 1

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.

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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.

ATRT-01/01B S3 USER’S MANUAL REV 1

1.2 Technical Specifications

1.2.1. ATRT-01 S3 Technical Specifications

Table 1. ATRT-01 S3 Technical Specifications

TYPE Transformer Turns Ratio Tester

PHYSICAL SPECIFICATIONS Dimensions: 12” x 10” x 8” (30.4 cm x 25.4 cm x 20.3 cm)

Weight: 8 lbs (3.6 Kg)

INPUT POWER 120 or 240 Vac (Selectable), 50/60 Hz

MEASURING METHOD ANSI/IEEE C57.12.90

RATIO MEASURING RANGE 0.8 - 15,000 (5 digit resolution)

TURNS-RATIO ACCURACY 40 Vac: 0.8-1,999 (0.1%), 2,000-3,999 (0.25%), 4,000-15,000 (1%)

4 Vac: 0.8-1,999 (0.1%), 2,000-3,999 (0.25%), 4,000-15,000 (2%)

TEST VOLTAGE 4 Vac @ 1.0A, 40 Vac @ 0.6A

PHASE ANGLE

MEASUREMENT

POLARITY READING In-Phase or Out-of-Phase indication

EXCITATION CURRENT

READING RANGE

DISPLAY Back-lit LCD (128 x 64 pixels), viewable in direct sunlight and lo w light levels

COMPUTER INTERFACE RS-232C

PC SOFTWARE Windows XP/Vista/7 Transformer Analysis Software (included with purchase)

INTERNAL TEST RECORD

STORAGE

EXTERNAL TEST RECORD

STORAGE

SAFETY Designed to meet IEC 61010 (1995), UL 61010A-1, and CSA-C22.2

ENVIRONMENT Operating: -10ºC to 50ºC (15ºF to +122ºF)

HUMIDITY (MAX) 90% RH @ 40˚ C (104˚ F) non-condensing

ALTITUDE (MAX) 2000m (6562 ft) to full safety specifications

CABLES One 15 ft. (4.6m) Single phase cable, one power cord, one cable bag

OPTIONS Transportation Case (Can hold unit and cables)

WARRANTY One year on parts and labor

0 - 360 degrees, Accuracy ±0.2 degree (±1 digit)

0-2 Amperes, Accuracy: 2% of reading (±1 mA)

128 records of 33 readings

Up to 999 test records on external USB Flash drive.

standards

Storage: (-30ºC to 70ºC (-22ºF to +158ºF)

The above specifications are valid at nominal operating voltage and at a temperature of 25°C (77°F). Specifications may change without prior notice.

NOTE

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1.2.2. ATRT-01B S3 Technical Specifications

Table 2. ATRT-01B S3 Technical Specifications

TYPE Transformer Turns Ratio Tester

PHYSICAL SPECIFICATIONS Dimensions: 12” x 10” x 8” (30.4 cm x 25.4 cm x 20.3 cm)

Weight: 9 lbs (4.3 Kg)

INPUT POWER 90 to 240 Vac, 50/60 Hz

Battery: SLA battery delivering up to 4 hours of continuous operation per charge.

MEASURING METHOD ANSI/IEEE C57.12.90

RATIO MEASURING RANGE 0.8 - 15,000 (5 digit resolution)

TURNS-RATIO ACCURACY 40 Vac: 0.8-1,999 (0.1%), 2,000-3,999 (0.25%), 4,000-15,000 (1%)

4 Vac: 0.8-1,999 (0.1%), 2,000-3,999 (0.25%), 4,000-15,000 (2%)

TEST VOLTAGE 4 Vac @ 500mA, 40 Vac @ 70mA

PHASE ANGLE

MEASUREMENT

POLARITY READING In-Phase or Out-of-Phase indication

EXCITATION CURRENT

READING RANGE

DISPLAY Back-lit LCD (128 x 64 pixels), viewable in direct sunlight and lo w light levels

COMPUTER INTERFACE RS-232C

PC SOFTWARE Windows XP/Vista/7 Transformer Analysis Software (included with purchase)

INTERNAL TEST RECORD

STORAGE

EXTERNAL TEST RECORD

STORAGE

SAFETY Designed to meet IEC 61010 (1995), UL 61010A-1, and CSA-C22.2

ENVIRONMENT Operating: -10ºC to 50ºC (15ºF to +122ºF)

HUMIDITY (MAX) 90% RH @ 40˚ C (104˚ F) non-condensing

ALTITUDE (MAX) 2000m (6562 ft) to full safety specifications

CABLES One 15 ft. (4.6m) Single phase cable, one power cord, one cable bag

OPTIONS Transportation Case (Can hold unit and cables)

WARRANTY One year on parts and labor

0 - 360 degrees, Accuracy ±0.2 degree (±1 digit)

0-2 Amperes, Accuracy: 2% of reading (±1 mA)

128 records of 33 readings

Up to 999 test records on external USB Flash drive.

standards

Storage: (-30ºC to 70ºC (-22ºF to +158ºF)

The above specifications are valid at nominal operating voltage and at a temperature of 25°C (77°F). Specifications may change without prior notice.

NOTE

ATRT-01/01B S3 USER’S MANUAL REV 1

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.

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

Item

Number

1 2

3 4

5 6 7

Panel Markings Functional Description

120/240 Vac, 2A, 50-60Hz

Fuse: 250Vac, 3A Fast-Blow

Figure 1. ATRT-01 S3 Controls and Indicators

USB MEM USB Flash drive interface

RS-232C RS-232C computer interface port

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

Rugged alpha-numeric keypad

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

Input power connector and fused power sw itch w ith third-w ire sa fe ty ground.

ATRT-01/01B S3 USER’S MANUAL REV 1

Item

Number

1 2

3 4 5 6 7 8

Figure 2. ATRT-01B S3 Controls and Indicators

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

Panel Markings Functional Description

USB MEM USB Flash drive interface

RS-232C RS-232C computer interface port

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

120-240 Vac, 2A, 50-60Hz

Fuse: 250Vac, 3A Fast-Blow

Rugged alpha-numeric keypad

CHARGER

POWER Power switch

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

Input power connector

Battery charging indicator. LED lights up when bat tery is being charged.

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2.0 PRE-TEST SETUP

2.1 ATRT-01 S3 Operating Voltage

The ATRT-01 S3 can be operated from 120 Vac or 240 Vac. The power voltage can be set using the voltage selector switch on the front panel (see Figure 1, item #5)

2.2 ATRT-01B S3 Operating Power

The ATRT-01B S3 is powered by a rechargeable (6 Vdc / 7 AH) sealed lead acid gel battery. The unit can operate continuously for up to 6 hours between charges. It can also be used while charging. Plugging the ATRT-01B S3 into an ac power outlet after the battery is fully charged will not damage the battery.

• It is recommended that the ATRT-01B S3 be plugged into an ac outlet when it is

NOTES

2.3 LCD Screen Contrast Control

not in use.

• The ATRT-01B S3 uses the Genesis model NP7-6 battery. It can also be replaced

with the Panasonic model LC-R122R2PU battery.

To increase the LCD screen contrast, press and hold the [∧ Contrast] key for two seconds. Release the button when the desired contrast level has been reached.

To decrease the LCD screen contrast, press and hold the [∨ Contrast] key for two seconds. Release the button when the desired contrast level has been reached.

For the ATRT-01B S3, the back-light turns off after 30 seconds of operation to conserve power. Press any key on the keypad to re-light the back-light.

ATRT-01/01B S3 USER’S MANUAL REV 1

3.0 OPERATING PROCEDURES

3.1 ATRT Transformer Connection Diagrams

Figure 3. Typical Single-Phase Transformer Connection

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Figure 4. Typical Auto Transformer Connection

ATRT-01/01B S3 USER’S MANUAL REV 1

Figure 5. Typical CT Connection

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Figure 6. Typical Bushing CT Connection on a Single Transformer

ATRT-01/01B S3 USER’S MANUAL REV 1

3.2 Setting the Test Voltage

The ATRT offers two test voltages, 4 Vac and 40 Vac. The unit always defaults to 40 Vac at power-on. The 4 Vac test voltage can be used in situations where the 40 Vac excitation voltage may saturate the CT’s. To set the test voltage:

a. Turn on the unit and start from the “ START-UP” menu:

1. TEST TRANSFORMER

2. SETUP

3. CALCULATOR

time: 14:21:34 date: 05/24/11

1. TEST TRANSFORMER

2. SETUP

3. CALCULATOR

bAT: time: 14:21:34 date: 05/24/11

ATRT-01 S3 “START-UP” menu ATRT-01B S3 “START-UP” menu

Press the [2] key (SETUP).

b. The following screen will be displayed:

1. RECORD ID

2. TEST VOLTAGE

3. PRINT RECORD

4. SAVE/RESTORE RECORD

5. SET TIME

6. SET LANGUAGE

1. RECORD ID

2. TEST VOLTAGE

3. PRINT RECORD

4. SAVE/RESTORE RECORD

5. SET TIME

6. SET LANGUAGE

7. SET 50/60 HZ

ATRT-01 S3 ATRT-01B S3

Press the [2] key (TEST VOLTAGE).

c. The following screen will be displayed:

1. 4 Volts

2. 40 VOLTS

Press the [1] key (4 VOLTS) to select 4 volts as the test voltage or press the [2] key (40 VOLTS) to select 40 volts as the test voltage.

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

40 VOLTS SET

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

3.3 Setting the Date and Time

To set the date and time:

a. Start from the “START-UP” menu:

1. TEST TRANSFORMER

2. SETUP

3. CALCULATOR

time: 14:21:34 date: 05/24/11

Press the [2] key (SETUP).

b. The following screen will be displayed:

1. RECORD ID

2. TEST VOLTAGE

3. PRINT RECORD

4. SAVE/RESTORE RECORD

5. SET TIME

6. SET LANGUAGE

ATRT-01/01B S3 USER’S MANUAL REV 1

Press the [5] key (SET TIME)

c. The following screen will be displayed:

ENTER DATE

MM-DD-YY

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

ENTER TIME

HH:MM:SS

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

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3.4 Setting the Interface Language

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

a. Start from the “START-UP” menu:

1. TEST TRANSFORMER

2. SETUP

3. CALCULATOR

time: 14:21:34 date: 05/24/11

Press the [2] key (SETUP).

b. The following screen will be displayed:

1. RECORD ID

2. TEST VOLTAGE

3. PRINT RECORD

4. SAVE/RESTORE RECORD

5. SET TIME

6. SET LANGUAGE

Press the [6] key (SET LANGUAGE).

c. The following screen will be displayed:

1. ENGLISH

2. TURKISH

3. SPANISH

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

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

ATRT-01/01B S3 USER’S MANUAL REV 1

3.5 Setting the Frequency (ATRT-01B S3 Only)

Follow the steps below to set the preferred frequency (50 or 60 Hz):

a. Start from the “START-UP” menu:

1. TEST TRANSFORMER

2. SETUP

3. CALCULATOR

bAT: time: 14:21:34 date: 05/24/11

Press the [2] key (SETUP).

b. The following screen will be displayed:

1. RECORD ID

2. TEST VOLTAGE

3. PRINT RECORD

4. SAVE/RESTORE RECORD

5. SET TIME

6. SET LANGUAGE

7. SET 50/60 HZ

Press the [7] key (SET 50/60 HZ).

c. The following screen will be displayed:

1. 60 Hz

2. 50 hz

Select the preferred frequency by pressing the corresponding key on the keypad (

[2]). The frequency will be set and a confirmation screen will be displayed as shown

below:

60 hz set

[1] or

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

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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:

a. Start from the “START-UP” menu:

1. TEST TRANSFORMER

2. SETUP

3. CALCULATOR

time: 14:21:34 date: 05/24/11

Press the [2] key (SETUP).

b. The following screen will be displayed:

1. RECORD ID

2. TEST VOLTAGE

3. PRINT RECORD

4. SAVE/RESTORE RECORD

5. SET TIME

6. SET LANGUAGE

Press the [1] key (RECORD ID).

c. The following screen will be displayed:

COMPANY:

↑/↓ TO POSITION

"ENTER" TO ACCEPT

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

[2] key twice. To erase the character at the cursor position, press the [CLEAR] key.

the Press the

[Contrast ∧] key to move to the next character. Press the [Contrast ∨]

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:

STATION:

↑/↓ TO POSITION

"ENTER" TO ACCEPT

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

e. The following screen will be displayed:

CIRCUIT:

↑/↓ TO POSITION

"ENTER" TO ACCEPT

ATRT-01/01B S3 USER’S MANUAL REV 1

Type the circuit information using the alpha-numeric keypad and then press the

[ENTER] key.

f. The following screen will be displayed:

MANUFACTURER:

↑/↓ TO POSITION

"ENTER" TO ACCEPT

Type the manufacturer name using the alpha-numeric keypad and then press the

[ENTER] key.

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g. The following screen will be displayed:

MODEL:

↑/↓ TO POSITION

"ENTER" TO ACCEPT

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

h. The following screen will be displayed:

SERIAL NUMBER:

↑/↓ TO POSITION

"ENTER" TO ACCEPT

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

i. The following screen will be displayed:

KVA RATING:

↑/↓ TO POSITION

"ENTER" TO ACCEPT

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

j. The following screen will be displayed:

OPERATOR:

↑/↓ TO POSITION

"ENTER" TO ACCEPT

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.

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3.6.2. Testing a Single Phase Transformer

Follow the steps below to test a single phase transformer:

a. Start from the “START-UP” menu:

1. TEST TRANSFORMER

2. SETUP

3. CALCULATOR

time: 14:21:34 date: 05/24/11

Press the [1] key (TEST TRANSFORMER).

b. The following screen will be displayed:

XFMR CONFIG:

1. SINGLE PHASE

2. Dy

3. YD

4. DD

5. YY

6. NEXT PAGE

Press the [1] key (SINGLE PHASE).

c. The following screen will be displayed:

NAME PLATE VOLTAGE?

1. yes

2. no

3. use prev data

Option 3 (USE PREV DATA) will be listed only if you had provided name plate voltages for a previous test.

NOTE

1. YES

Press the [1] key (YES) if you would like to enter the transformer name plate voltage values. The following screen will be displayed:

ATRT-01/01B S3 USER’S MANUAL REV 1

NAME PLATE VOLTAGE:

H : X

0 :

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

NAME PLATE VOLTAGE:

H : X

500 :

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

NAME PLATE VOLTAGE:

H : X

500 : 0

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

NAME PLATE VOLTAGE:

H : X

500 : 10

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.

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d. The following screen will be displayed:

"START" TO TEST

"STOP" TO ABORT

Press the

[START] key to start the test.

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

TESTING AT 40 VOLTS

TEST IN PROGRESS

PLEASE WAIT...

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

RAT: +1.003 PHS: 0.02°

mA: 0.0

ERR: 0.05%

The percentage error (ERR) will be displayed only if name plate voltage values were entered.

NOTE

The polarity is displayed as either a plus sign (+) for “in-phase” or a minus sign (-) for “out-of-phase”.

Press any key to continue.

f. The following screen will be displayed:

KEEP THIS READING?

1. YES

2. NO

Press the [1] key (YES) to save the reading.

g. The following screen will be displayed:

TEST SAVED

ATRT-01/01B S3 USER’S MANUAL REV 1

Press any key to continue.

The above screen will be displayed if there is currently no data in the unit’s memory buffer. If a test was previously performed or a test record was

NOTE

restored from Flash EEPROM or from a Flash drive, the following screen will be displayed instead:

PREVIOUS DATA IN BUF

1. APPEND PREV. DATA

2. CLEAR PREV. DATA

Press the [1] key (APPEND PREV. DATA) to append the data in the unit’s working memory to the current test results, or press the [2] key (CLEAR PREV. DATA) to clear any previous data from the unit’s memory buffer and only save the current test results.

The following screen will then be displayed:

TEST SAVED

Press any key to continue.

REV 1 ATRT-01/01B S3 USER’S MANUAL

h. The following screen will be displayed:

RUN ANOTHER TEST?

1. YES

2. NO

3. REPEAT PREV. TEST

Press the [2] key (NO).

i. The following screen will be displayed:

SAVE THIS RECORD?

1. YES

2. NO

Press the [1] key (YES) to save the test record to the unit’s Flash EEPROM.

j. The test record will be saved and the following screen will be displayed:

RECORD NUMBER 1 HAS BEEN SAVED!

The unit will automatically assign the record number and will not over-write existing test records.

NOTE

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

ATRT-01/01B S3 USER’S MANUAL REV 1

3.6.3. Testing a Three Phase Transformer

Follow the steps below to test a three phase transformer:

a. Start from the “START-UP” menu:

1. TEST TRANSFORMER

2. SETUP

3. CALCULATOR

time: 14:21:34 date: 05/24/11

Press the [1] key (TEST TRANSFORMER).

b. The following screen will be displayed:

XFMR CONFIG:

1. SINGLE PHASE

2. Dy

3. YD

4. DD

5. YY

6. NEXT PAGE

You can press the [6] key (NEXT PAGE) to view additional transformer types. The following screen will be displayed:

NOTE

XFMR CONFIG:

1. DZ

2. ZD

3. YZ

4. ZY

5. TT

6. PREVIOUS PAGE

Select a three-phase transformer test by pressing the corresponding key ([2] to [5]). For this example, press the

[2] key (Dy) from the first page to select the Delta to Y phase

transformer test.

c. The following screen will be displayed:

X0 ACCESSIBLE?

1. YES

2. NO

Press the

[1] key (YES) if X0 is accessible or the [2] key (NO) if it is not accessible.

REV 1 ATRT-01/01B S3 USER’S MANUAL

d. The following screen will be displayed:

1. DY1

2. DY3

3. DY5

4. DY7

5. DY9

6. DY11

Select the transformer configuration by pressing the corresponding key ([1] to [6]). For this example, press the [1] key (Dy1).

e. The following screen will be displayed:

NAME PLATE VOLTAGE?

1. yes

2. no

3. USE PREV DATA

Option 3 (USE PREV DATA) will be listed only if you had provided name plate voltages for a previous test.

NOTE

1. YES

Press the [1] key (YES) if you would like to enter the transformer name plate voltage values. The following screen will be displayed:

NAME PLATE VOLTAGE:

H : X

0 :

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

NAME PLATE VOLTAGE:

H : X

500 :

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

ATRT-01/01B S3 USER’S MANUAL REV 1

NAME PLATE VOLTAGE:

H : X

500 : 0

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

NAME PLATE VOLTAGE:

H : X

500 : 10

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:

TESTING AT 40 VOLTS

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):

PHASE A

CABLE X1,X2 to x1,x0 h1,h2 to h1,h3

XFMR

"START" when READY

REV 1 ATRT-01/01B S3 USER’S MANUAL

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:

TESTING: DYN1 phase a

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

RATIO MA %DIFF

+15.003 001 0.02

"ENTER" TO CONTINUE..

Press the [ENTER] key to continue.

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

selected test:

PHASE B

CABLE X1,X2 to x2,x0 h1,h2 to h2,h1

XFMR

"START" when READY

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:

TESTING: DYN1 phase B

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

ATRT-01/01B S3 USER’S MANUAL REV 1

RATIO MA %DIFF

+15.003 001 0.02 +15.015 001 0.10

"ENTER" TO CONTINUE..

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:

PHASE C

CABLE X1,X2 to x3,x0 h1,h2 to h3,h2

XFMR

"START" when READY

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:

TESTING: DYN1 phase C

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

TEST RESULTS:

RATIO MA %DIFF A +15.003 001 0.02

B +15.015 001 0.10 C +15.000 001 0.00

181.4° 183.2° 181.8° XFMR TYPE: DYN1

The phase angles for Phase A, B, and C are also displayed at the bottom of the test results from left to right, respectively. Press any key to continue.

REV 1 ATRT-01/01B S3 USER’S MANUAL

l. The following screen will be displayed:

KEEP THIS READING?

1. YES

2. NO

Press the [1] key (YES) to save the reading.

m. The following screen will be displayed:

TEST SAVED

Press any key to continue.

The above screen will be displayed if there is currently no data in the unit’s memory buffer. If a test was previously performed or a test record was

NOTE

restored from Flash EEPROM or from a Flash drive, the following screen will be displayed instead:

PREVIOUS DATA IN BUF

1. APPEND PREV. DATA

2. CLEAR PREV. DATA

The following screen will then be displayed:

TEST SAVED

Press any key to continue.

n. The following screen will be displayed:

RUN ANOTHER TEST?

1. YES

2. NO

3. REPEAT PREV. TEST

Press the [2] key (NO).

o. The following screen will be displayed:

SAVE THIS RECORD?

1. YES

2. NO

ATRT-01/01B S3 USER’S MANUAL REV 1

Press the [1] key (YES) to save the test record to the unit’s Flash EEPROM.

p. The test record will be saved and the following screen will be displayed:

RECORD NUMBER 2 HAS BEEN SAVED!

The unit will automatically assign the record number and will not over-write existing test records.

NOTE

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

REV 1 ATRT-01/01B S3 USER’S MANUAL

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:

a. Start from the “START-UP” menu:

1. TEST TRANSFORMER

2. SETUP

3. CALCULATOR

time: 14:21:34 date: 05/24/11

Press the [2] key (SETUP).

b. The following screen will be displayed:

1. RECORD ID

2. TEST VOLTAGE

3. PRINT RECORD

4. SAVE/RESTORE RECORD

5. SET TIME

6. SET LANGUAGE

Press the [3] key (PRINT RECORD).

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

SINGLE PHASE Num Tests: 1 05/26/11 15:33:58

Press the

1 SINGLE PHASE 40 volts

RATIO ma %DIFF

1.003 0002 0.3

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

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

ATRT-01/01B S3 USER’S MANUAL REV 1

3.7.2. Saving Test Results to a Test Record

After performing a test, the user is presented the option to save the test results to the unit’s Flash EEPROM or to a USB Flash Drive. If the test results are not saved immediately after performing a test, they will still remain in the working memory and can be saved later, as long as a new test has not been performed and the unit has not been turned off. Follow the steps below to save the test results from the working memory to a test record (the following procedure can also be used to re-save a restored test record to a new memory location or to a USB Flash Drive):

a. Perform a test or restore a test record to the working memory (see section 3.7.3 and

3.7.4), and then start from the “START-UP” menu:

1. TEST TRANSFORMER

2. SETUP

3. CALCULATOR

time: 14:21:34 date: 05/24/11

Press the [2] key (SETUP).

b. The following screen will be displayed:

1. RECORD ID

2. TEST VOLTAGE

3. PRINT RECORD

4. SAVE/RESTORE RECORD

5. SET TIME

6. SET LANGUAGE

Press the

[4] key (SAVE/RESTORE RECORD)

c. The following screen will be displayed:

1. RESTORE RECORD

2. SAVE RECORD

3. RECORD DIRECTORY

4. ERASE RECORD

5. COPY to THUMB DRIVE

Option 5 (COPY TO THUMB DRIVE) will be listed only if a USB Flash drive is connected to the ATRT.

NOTE

Press the [2] key (SAVE RECORD).

REV 1 ATRT-01/01B S3 USER’S MANUAL

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.

d. The following screen will be displayed:

1. SAVE INTERNALLY

2. SAVE TO THUMB DRIVE

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:

REC_001 SAVED TO THUMB DRIVE.

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

e. The following screen will be displayed:

RECORD NUMBER 2 HAS BEEN SAVED!

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

ATRT-01/01B S3 USER’S MANUAL REV 1

3.7.3. Restoring a Test Record From Flash EEPROM

Use the steps below to restore a test record from the ATRT’s Flash EEPROM to the working memory:

a. Start from the “START-UP” menu:

1. TEST TRANSFORMER

2. SETUP

3. CALCULATOR

time: 14:21:34 date: 05/24/11

Press the [2] key (SETUP).

b. The following screen will be displayed:

1. RECORD ID

2. TEST VOLTAGE

3. PRINT RECORD

4. SAVE/RESTORE RECORD

5. SET TIME

6. SET LANGUAGE

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

c. The following screen will be displayed:

1. RESTORE RECORD

2. SAVE RECORD

3. RECORD DIRECTORY

4. ERASE RECORD

5. COPY to THUMB DRIVE

Option 5 (COPY TO THUMB DRIVE) will be listed only if a USB Flash drive is connected to the ATRT.

NOTE

Press the [1] key (RESTORE RECORD).

REV 1 ATRT-01/01B S3 USER’S MANUAL

d. The following screen will be displayed:

RESTORE RECORD

1.ENTER RECORD NUMBER

2.SCROLL TO SELECT

If you have a USB Flash drive inserted in the ATRT’s “USB MEM” port, the following screen will be displayed instead of the above screen:

NOTE

1.INTERNAL STORAGE

2.THUMB DRIVE

Press the [1] key (INTERNAL STORAGE).

The following screen will be displayed:

RESTORE RECORD

1.ENTER RECORD NUMBER

2.SCROLL TO SELECT

Continue with the steps below.

1. ENTER RECORD NUMBER

Press the [1] key (ENTER RECORD NUMBER) if you know the record number that you would like to restore.

1.1. The following screen will be displayed:

RESTORE RECORD NUMBER:

Type the record number using the alpha-numeric keypad and then press the

[ENTER] key.

ATRT-01/01B S3 USER’S MANUAL REV 1

1.2. The following screen will be displayed:

RECORD RESTORED!

DISPLAY RECORD?

1.YES

2.NO

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:

SINGLE PHASE Num Tests: 1 05/27/11 15:25:57

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

1 SINGLE PHASE 40 volts

RATIO ma %DIFF

1.003 0002 0.3

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

REV 1 ATRT-01/01B S3 USER’S MANUAL

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:

#1 05/25/11 09:52 SINGLE PHASE 1 TESTS

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

press the [ENTER] key. Continue to step 1.2 on page 40.

ATRT-01/01B S3 USER’S MANUAL REV 1

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:

1. TEST TRANSFORMER

2. SETUP

3. CALCULATOR

time: 14:21:34 date: 05/24/11

Press the [2] key (SETUP).

b. The following screen will be displayed:

1. RECORD ID

2. TEST VOLTAGE

3. PRINT RECORD

4. SAVE/RESTORE RECORD

5. SET TIME

6. SET LANGUAGE

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

c. The following screen will be displayed:

1. RESTORE RECORD

2. SAVE RECORD

3. RECORD DIRECTORY

4. ERASE RECORD

5. COPY to THUMB DRIVE

Press the [1] key (RESTORE RECORD).

REV 1 ATRT-01/01B S3 USER’S MANUAL

d. The following screen will be displayed:

1.INTERNAL STORAGE

2.THUMB DRIVE

Press the [2] key (THUMB DRIVE).

e. The following screen will be displayed:

RESTORE THUMB DRIVE

REC_

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:

REC_000 restored! DISPLAY RECORD?

1.YES

2.NO

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

ATRT-01/01B S3 USER’S MANUAL REV 1

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

1 SINGLE PHASE 40 volts

RATIO ma %DIFF

1.003 0002 0.3

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

REV 1 ATRT-01/01B S3 USER’S MANUAL

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:

1. TEST TRANSFORMER

2. SETUP

3. CALCULATOR

time: 14:21:34 date: 05/24/11

Press the [2] key (SETUP).

b. The following screen will be displayed:

1. RECORD ID

2. TEST VOLTAGE

3. PRINT RECORD

4. SAVE/RESTORE RECORD

5. SET TIME

6. SET LANGUAGE

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

c. The following screen will be displayed:

1. RESTORE RECORD

2. SAVE RECORD

3. RECORD DIRECTORY

4. ERASE RECORD

5. COPY to THUMB DRIVE

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

d. The following screen will be displayed:

COPY REC TO THUMB DRV

1.COPY SINGLE RECORD

2.COPY ALL RECORDS

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:

ENTER RECORD NUMBER TO COPY TO FLASH DRV

NUMBER:

ATRT-01/01B S3 USER’S MANUAL REV 1

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

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

REV 1 ATRT-01/01B S3 USER’S MANUAL

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!

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

ATRT-01/01B S3 USER’S MANUAL REV 1

3.7.6. Viewing the Test Record Directory

Use the steps below to browse through a directory of the test records stored in the ATRT’s Flash EEPROM memory:

a. Start from the “START-UP” menu:

1. TEST TRANSFORMER

2. SETUP

3. CALCULATOR

time: 14:21:34 date: 05/24/11

Press the [2] key (SETUP).

b. The following screen will be displayed:

1. RECORD ID

2. TEST VOLTAGE

3. PRINT RECORD

4. SAVE/RESTORE RECORD

5. SET TIME

6. SET LANGUAGE

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

c. The following screen will be displayed:

1. RESTORE RECORD

2. SAVE RECORD

3. RECORD DIRECTORY

4. ERASE RECORD

5. COPY to THUMB DRIVE

Option 5 (COPY TO THUMB DRIVE) is listed only if a USB Flash drive is connected to the unit.

NOTE

Press the [3] key (RECORD DIRECTORY).

REV 1 ATRT-01/01B S3 USER’S MANUAL

d. The following screen will be displayed:

RECORDS DIRECTORY

"UP" TO SCROLL FWD "DWN" TO SCROLL RVS

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

SINGLE PHASE Num Tests: 1 05/27/11 15:25:57

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.

ATRT-01/01B S3 USER’S MANUAL REV 1

3.7.7. Erasing Test Records from the Flash EEPROM

Follow the steps below to erase test records from the Flash EEPROM

a. Start from the “START-UP” menu:

1. TEST TRANSFORMER

2. SETUP

3. CALCULATOR

time: 14:21:34 date: 05/24/11

Press the [2] key (SETUP).

b. The following screen will be displayed:

1. RECORD ID

2. TEST VOLTAGE

3. PRINT RECORD

4. SAVE/RESTORE RECORD

5. SET TIME

6. SET LANGUAGE

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

c. The following screen will be displayed:

1. RESTORE RECORD

2. SAVE RECORD

3. RECORD DIRECTORY

4. ERASE RECORD

5. COPY to THUMB DRIVE

Press the

[4] key (ERASE RECORD).

REV 1 ATRT-01/01B S3 USER’S MANUAL

d. The following screen will be displayed:

ERASE RECORD

1.ERASE SINGLE REC.

2.ERASE ALL RECORDS

"STOP" TO EXIT

If you have a USB Flash drive inserted in the ATRT’s “USB MEM” port, the following screen will be displayed instead of the above screen:

NOTE

1.ERASE INTERNAL REC

2.ERASE THUMB DRV REC

Press the [1] key (ERASE INTERNAL REC).

The following screen will be displayed:

ERASE RECORD

1.ERASE SINGLE REC.

2.ERASE ALL RECORDS

"STOP" TO EXIT

Continue with the steps below.

1. ERASE SINGLE REC.

Press the [1] key (ERASE SINGLE REC.) to erase a single test record from the unit’s internal Flash EEPROM. The following screen will be displayed:

ERASE RECORD

1.ENTER RECORD NUMBER

2.SCROLL TO SELECT

1. ENTER RECORD NUMBER

Press the you would like to erase. The following screen will be displayed:

[1] key (ENTER RECORD NUMBER) if you know the record number that

ATRT-01/01B S3 USER’S MANUAL REV 1

ERASE RECORD NUMBER:

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

NOTE

Type the record number that you would like to erase using the alpha-numeric keypad and then press the

[ENTER] key. If you do not know the test record

number, you can first view the test record directory using the instructions in section 3.7.6.

The following screen will be displayed while the record is being erased:

ERASing record PLEASE WAIT...

The following screen will be displayed when the test record has been completely erased:

RECORD NUMBER 8 ERASED!

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

REV 1 ATRT-01/01B S3 USER’S MANUAL

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:

RECORDS DIRECTORY

"UP" TO SCROLL FWD "DWN" TO SCROLL RVS

Press the

[Contrast ∧] or [Contrast ∨] key to scroll through the test record

directory. The test record header will be displayed as shown:

SINGLE PHASE Num Tests: 1 05/27/11 15:25:57

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:

RECORD NUMBER 9 ERASED!

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

ATRT-01/01B S3 USER’S MANUAL REV 1

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:

ERASE ALL RECORDS!

ARE YOU SURE?

"ENTER" To CONTINUE.

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:

ERASing recordS PLEASE WAIT...

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

RECORDS ERASED!

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

REV 1 ATRT-01/01B S3 USER’S MANUAL

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:

1. TEST TRANSFORMER

2. SETUP

3. CALCULATOR

time: 14:21:34 date: 05/24/11

Press the [2] key (SETUP).

b. The following screen will be displayed:

1. RECORD ID

2. TEST VOLTAGE

3. PRINT RECORD

4. SAVE/RESTORE RECORD

5. SET TIME

6. SET LANGUAGE

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

c. The following screen will be displayed:

1. RESTORE RECORD

2. SAVE RECORD

3. RECORD DIRECTORY

4. ERASE RECORD

5. COPY to THUMB DRIVE

Press the

[4] key (ERASE RECORD).

d. The following screen will be displayed:

1.ERASE INTERNAL REC

2.ERASE THUMB DRV REC

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

e. The following screen will be displayed:

ERASE RECORD

1.ERASE SINGLE REC.

2.ERASE ALL RECORDS

"STOP" TO EXIT

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:

ERASE THUMB DRIVE

REC_

ATRT-01/01B S3 USER’S MANUAL REV 1

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:

THUMB DRIVE RE000 ERASED!

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.

REV 1 ATRT-01/01B S3 USER’S MANUAL

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!

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

ATRT-01/01B S3 USER’S MANUAL REV 1

3.8 Using the Turns Ratio Calculator

The ATRT-01 and ATRT-01B S2 feature a turns ratio calculator that can be used to calculate the turns ratio for various transformer types. The user only needs to provide the H and X name plate voltage values and the unit will calculate the turns ratio. Follow the steps below to use the turns ratio calculator.

a. Start from the “START-UP” menu:

1. TEST TRANSFORMER

2. SETUP

3. CALCULATOR

time: 14:21:34 date: 05/24/11

Press the [3] key (CALCULATOR).

b. The following screen will be displayed:

XFMR CONFIG:

1. SINGLE PHASE

2. DY

3. YD

4. DD

5. YY

6. NEXT PAGE

Select the transformer configuration by pressing the corresponding key on the keypad. You can press the [6] key (NEXT PAGE) to view additional transformer configuration types. For this example, press the [3] key (Yd) to select the Y-dT transformer type.

The following steps will differ for other transformer configuration types.

NOTE

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c. The following screen will be displayed:

H0 accessible?

1. YES

2. NO

1. YES

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

1. YND1

2. YND3

3. YND5

4. YND7

5. YND9

6. YND11

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:

1. YD1

2. YD3

3. YD5

4. YD7

5. YD9

6. YD11

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

d. The following screen will be displayed

NAME PLATE VOLTAGE:

H : X

0 :

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

NAME PLATE VOLTAGE:

H : X

1,734 :

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

ATRT-01/01B S3 USER’S MANUAL REV 1

NAME PLATE VOLTAGE:

H : X

1,734 : 0

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

NAME PLATE VOLTAGE:

H : X

1,734 : 100

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

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

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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 phasedisplacement 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.