The Vanguard Instruments ATRT-03 S2 is the third generation, microprocessor-based, automatic, three phase, transformer turns-ratio tester. This light weight, rugged, portable unit is designed for transformer testing at utility power substations.

The ATRT-03 S2 determines the transformer turns ratio using the IEEE C57.12.90 measurement method. The ATRT-03 S2 outputs an excitation test voltage to the transformer primary windings. The induced secondary voltage is sensed and the transformer turns ratio is calculated. The ATRT-03 S2 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 large LCD. The automatic transformer type detection feature allows the ATRT-03 S2 to detect and test 130 transformer types defined by ANSI, CEI/IEC and Australian standards.

• 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
• Optional 4.5" thermal printer
• Powered from a single phase 100-264 Vac 50/60 Hz

ATRT-03 S2	Cables
Cable Part Number [8000-0005] USB Cable [ 6' (1.83m) ] 8000-0005 [8000-0006] RS-232C Cable [ 6' (1.83m) ] 8000-0006 [8000-0009] H Single Phase Cable [ 15' (4.57m) ] 8000-0009 [8000-0010] H Extension Cable [ 25' (7.62m) ] 8000-0010 [8000-0011] X Single Phase Cable [ 15' (4.57m) ] 8000-0011 [8000-0012] X Extension Cable [ 25' (7.62m) ] 8000-0012 [8000-0013] H 3-Phase Cable [ 15' (4.57m) ] 8000-0013 [8000-0014] X 3-Phase Cable [ 15' (4.57m) ] 8000-0014 [8000-0015] LTC Control Cable [ 15' (4.57m) ] 8000-0015 [8000-0016] Power + Ground Combination Cable 8000-0016 [8000-0186] 3-Phase H Cable [ 30' (9.14m) ] 8000-0186 [8000-0187] 3-Phase X Cable [ 30' (9.14m) ] 8000-0187 [8000-0188] Single-Phase H Cable [ 30' (9.14m) ] 8000-0188 [8000-0189] Single-Phase X Cable [ 30' (9.14m) ] 8000-0189

ATRT-03 S2	Technical Specifications
TYPE Portable, lightweight, automatic, 3-phase transformer turns-ratio meter PHYSICAL SPECIFICATIONS 18”W x 7”H x 15”D   (45.7 cm x 17.8 cm x 38.1 cm); Weight: 20 lbs (9.0 kg) OPERATING VOLTAGE 100 – 240 Vac, 50/60 Hz MEASUREMENT METHOD ANSI/IEEE C57.12.90 TURNS-RATIO MEASURING RANGE 0.8 – 15,000 TURNS-RATIO ACCURACY 0.8 – 1,999: ±0.1%, 2,000 – 3,999: ±0.25%. 4,000 – 15,000: ±1% @ 8 Vac 0.8 – 1,999: ±0.1%, 2,000 – 3,999: ±0.20%. 4,000 – 15,000: ±1% @ 40 Vac 0.8 – 1,999: ±0.1%, 2,000 – 3,999: ±0.15%. 4,000 – 15,000: ±1% @ 100 Vac TEST VOLTAGES 8 Vac @ 1Amp, 40 Vac @ 0.2 Amp, 100 Vac @ 0.1 Amp EXCITATION CURRENT READING RANGE 0 – 1 Ampere; Accuracy: ±0.1 mA, ±2% of reading (±1 mA) PHASE-ANGLE MEASUREMENT 0 – 360 Degrees; Accuracy: ±0.2 degree (±1 digit) DISPLAY Back-lit LCD screen (64 x 128 dot graphic display); Viewable in bright sunlight and low-light levels PRINTER Built-in 4.5-inch wide thermal printer (Optional) COMPUTER INTERFACES One RS-232C port, One USB port EXTERNAL DATA STORAGE One USB Flash drive interface port; Up to 999 transformer test records can be stored on a USB Flash drive (not included). PC SOFTWARE Windows? XP/Vista-based Transformer Turns-Ratio Analyzer application is included with purchase price INTERNAL TEST RECORD STORAGE stores 112 complete transformer test records, each record holding the test record header and up to 99 readings INTERNAL TEST PLAN STORAGE Can store 128 transformer test plans internally. Test plans can be transferred to the unit from the PC via the RS-232C/USB port or via the USB Flash drive interface LOAD TAP CHANGER CONTACT 240 Vac, 2 Amps SAFETY Designed to meet UL 61010A-1 and CAN/CSA C22.2 No. 1010.1-92 standards ENVIRONMENT Operating: -10? to 50? C (15? to +122? F); Storage: -30? C to 70? C (-22? to +158? F) CABLES One 15-foot Single-phase set, One 15-foot 3-phase set, One 25-foot extension set, One safety ground, One USB, One RS-232C, cable bag OPTIONS Transportation Case WARRANTY One year on parts and labor Specifications are valid at nominal voltage and ambient temperature of +25?C (+77?F).