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ISO 9001 and 17025 Certified


ATRT-01 S3

Transformer Turns Ratio Tester

9023-UC [ATRT-01 S3]

The ATRT-01 S3 is Vanguard’s fourth generation, micro-processor based, single phase, automatic transformer turns-ratio tester. 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.

  • Standalone or computer-controlled
  • Inexpensive
  • Displays turns-ratio from 0.8-15,000
  • Calculates turns-ratio percentage error
  • Displays winding polarity and phase angle
  • Displays excitation current

ATRT-01 S3



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
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
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
Specifications are valid at nominal voltage and ambient temperature of +25˚C (+77˚F).



Field Pictures

ATRT-01 S3 Shipment to Getco, India