Vanguard Instruments ATRT-01 S3 Manuel utilisateur

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

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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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REV 1 ATRT-01/01B S3 USER’S MANUAL

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

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ATRT-01/01B S3 USER’S MANUAL REV 1

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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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:

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

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

•Warning messages are indicated as:

WARNING

Warning message

•Important notes are indicated as:

NOTE

Note details

1. OPTION 1

2. OPTION 2

3. OPTION 3

4. OPTION 4

5. OPTION 5

1. OPTION 1

2. OPTION 2

3. OPTION 3

4. OPTION 4

5. OPTION 5

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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.

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

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

EXCITATION CURRENT

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

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

COMPUTER INTERFACE RS-232C

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

INTERNAL TEST RECORD

STORAGE 128 records of 33 readings

EXTERNAL TEST RECORD

STORAGE Up to 999 test records on external USB Flash drive.

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

standards

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

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

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

NOTE

The above specifications are valid at nominal operating voltage and at a

temperature of 25°C (77°F). Specifications may change without prior notice.

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

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

EXCITATION CURRENT

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

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

COMPUTER INTERFACE RS-232C

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

INTERNAL TEST RECORD

STORAGE 128 records of 33 readings

EXTERNAL TEST RECORD

STORAGE Up to 999 test records on external USB Flash drive.

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

standards

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

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

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

NOTE

The above specifications are valid at nominal operating voltage and at a

temperature of 25°C (77°F). Specifications may change without prior notice.

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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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