Vanguard ATRT-03A 3-Phase Transformer Turns Ratio Tester

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The ATRT-03A is Vanguard’s second generation, microprocessor-based, automatic,three phase, transformer turns-ratio tester. This lightweight, portable, battery-powered unit is designed for testing transformers at utility power substations.The ATRT-03A determines the transformer turns-ratio using the IEEE C57.12.90
measurement method. The transformer turns-ratio (ranging from 0.8 to 15,000) is determined by precisely measuring the voltages across the unloaded transformer windings. To ensure accuracy, the ATRT-03A’s measuring circuitry self-calibrates before each measurement. It requires neither adjustment nor temperature compensation.
The ATRT-03A’s turns-ratio measurement accuracy is 0.1% or better.

Highest ratio: 0.8 - 15,000
Capable of detecting 130 different 3-phase transformer types defined by ANSI, IEC, and Australian standards
3 Test voltages available: 8Vac, 40Vac, 100Vac
Phase angle and excitation current measuring
Computer Interface (RS-232C and USB Port)
USB flash drive interface
Name-plate turns ratio calculation
Computed % error based on measured and calculated ratio
Built-in 4.5" thermal printer
Powered from a single phase 100-264 Vac 50/60 Hz or 110 – 370 Vdc or 12 Vdc

Product Includes
ATRT-03 Tester, One 15-foot single-phase cable set, One 15-foot 3-phase cable set, One 25-foot extension cable set, One cable-carrying and duffel bag

ATRT-03A Input Power Sources
The ATRT-03A is powered by two 12Vdc/2AH rechargeable SLA batteries. The high capacity, low power consuming circuitry allows the ATRT-03A to be used continuously for up to three hours between charges. The ATRT-03A features a built-in charger allowing the batteries to be charged while in use. The unit can
be operated from a wide range of voltages and power sources such as 85 – 264 Vac, 110 – 370 Vdc, or a 12 Vdc car battery.

Specifications
Measurement Method: ANSI/IEEE C57.12.90
Ratio Measuring Range: 0.8 – 15,000 (5-digit resolution)
Turns Ratio Accuracy: 0.8 – 1999: ±0.1%, 2,000 – 3,999: ±0.25%, 4,000 – 15,000: ±1% @ 8 Vac
0.8 – 1999: ±0.1%, 2,000 – 3,999: ±0.20%, 4,000 – 15,000: ±1% @ 40 Vac
0.8 – 1999: ±0.1%, 2,000 – 3,999: ±0.15%, 4,000 – 15,000: ±1% @ 100 Vac
Test Voltages: 8 Vac @ 1 amp, 40 Vac @ 0.6 amp, 100 Vac @ 0.1 amp
Excitation Current Range: 0 – 2 Amperes; Accuracy: ±1mA, ±2% of reading (±1 digit)
Phase Angle Measurment: 0 – 360 degrees; Accuracy: ±0.2 degrees ( ±1 digit)
Display: Back-lit LCD screen (20 Characters by 4 Lines); Viewable in bright sunlight and low-light levels
Printer: Built-in 4.5-inch wide thermal printer
Computer Interface: RS-232C (19,200 baud) port
PC Software: Windows® XP/Vista-based Transformer Turns-Ratio Analyzer application is included with purchase price
Internal Test Record Storage: Stores 200 complete transformer test records. Each test record includes nameplate voltage, winding turns-ratios, excitation current, and winding phase angle
Internal Test Plan Storage: Stores up to 128 transformer test plans
Safety: UL Certified (UL 61010A-1), CAN/CSA Certified (C22.2 No. 1010.1-92)
Warranty: One year on parts and labor

size   17”W x 7”H x 13”D (14 lbs)
Shipping Weight   16.0000
Power Supply   100 – 120 Vac 50/60 Hz (3 amps) or 110 – 370 Vdc, or a 12 Vdc car battery.

Manufacturer Warranty   1 Year