• Capable of detecting 130 different 3-phase transformer types defined by ANSI, IEC, and Australian standards plus phase shifting transformers
• Store up to 128 transformer test-plans in Flash EEPROM
• Store up to 112 test records in Flash EEPROM
• Built-in USB Flash Drive Interface
• Computer Interface (RS-232C and USB Port)
• 4.5 Inch thermal printer
• Built-in transformer load tap changer
• Powered from the built-in rechargeable lead acid batteries (3 hours) or a single phase 100-240 Vac 50/60 Hz.

The Vanguard Instruments Company Model ATRT-03A Series 2 is Vanguard's third generation, microprocessor-based, automatic, three phase transformer turns-ratio tester.

The ATRT-03A Series 2 determines the transformer turns ratio using the IEEE C57.12.90 measurement method. The ATRT-03A Series 2 generates and outputs an excitation voltage to the three transformer primary winding. The included secondary voltage is sensed and the transformer turns ratio is calculated.

The ATRT-03A Series 2 is capable of measuring turns ratios from 0.8 to 15,000. The transformer turns-ratio, excitation current and phase-angle readings are displayed on the LCD. The built-in transformer type detection feature allows the ATRT-03A Series 2 to detect and test 130 transformer types defined by ANSI, CEI/IEC and Australian standards.

The ATRT-03A S2 can be used as a standalone

unit or can be computer-controlled. It can be

operated locally using its alpha-numeric keypad

and rotary switch. Information is displayed

on a back-lit LCD screen (128 x 64 pixels) that

is viewable in both bright sunlight and low-light

levels. Test reports can be printed in the fi eld on

the unit’s built-in 4.5-inch wide thermal printer.

The ATRT03A S2 can store up to 112 test records

and 128 test plans in Flash EEPROM. Test records

or test plans can be stored or transferred to and

from a PC via the available interfaces (RS-232C

port, USB port, USB Flash drive port).

Transformer Test Voltages

The ATRT-03A S2 generates excitation test voltages

internally. Three test voltages (8 Vac, 40

Vac, 100 Vac) allow the ATRT-03A S2 to test

CT’s and PT’s, as well as power transformers.

Auto-Detect Transformer

Confi guration

The ATRT-03A S2 can automatically detect 130

different transformer types defi ned by ANSI,

CEI/IEC, and Australian standards.

Internal Test Record

Storage

Up to 112 test records can be stored in the ATRT-

03A S2’s Flash EEPROM memory. Each test

record may contain up to 99 turns-ratio, excitation

current, phase angle and nameplate voltage

readings. Test records can be recalled locally or

transferred to a PC via the available interfaces

(RS-232C port, USB port, USB Flash drive port).

Transformer Test Plans

The ATRT-03A S2 can store up to 128 transformer

test-plans in its Flash EEPROM. A testplan

is comprised of the transformer nameplate

voltages for each tap setting. The calculated

turns-ratio based on the nameplate voltages

is compared with the measured turns-ratio to

derive the percentage error and Pass/Fail results.

By using a test plan, a transformer can be

quickly tested and turns-ratio Pass/Fail reports

can be reviewed. Test plans can be created with

the PC software and can be transferred to the

ATRT-03A S2 via the available interfaces (RS-

232C port, USB port, USB Flash drive port).

Part number ATRT-03AS2 ATRT-03A S2, cables, and PC software

Part number ATRT-03AS2 CASE ATRT-03A S2 shipping case

Part number Paper-TP4 Thermal printer paper