True 3-Phase Transformer Turns Ratio Tester


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9008-UC [Tri-Phase]

Vanguard’s new TRI-PHASE is a true 3-phase transformer turns ratio tester designed to conform to the IEEE C57.12.90 measurement method. The TRI-PHASE outputs a 3-phase excitation test voltage to the three transformer primary windings. The induced 3-phase secondary voltages are sensed and the transformer turns ratio is calculated. The TRI-PHASE is capable of measuring turns ratios from 0.8 to 15,000. The 3-phase excitation current, phase angle readings along with the turns ratios are displayed on the built-in LCD. Since a 3-phase voltage is used to excite the transformer windings, the TRI-PHASE can detect and measure turns ratios of any transformer type. The TRI-PHASETM can easily measure the turns ratio of phase-shifting transformers where other 3-phase transformer ratio testers cannot.

  • Generates its own 3-phase transformer test voltage from single-phase AC or DC Power input
  • Capable of detecting 130 different 3-phase transformer types defined by ANSI, IEC, and Australian standards plus phase shifting transformers
  • 64 x 128 graphic LCD screen
  • 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 a single phase 100-264 Vac 50/60 Hz





Technical Specifications

TYPE True three-phase transformer turns-ratio tester
PHYSICAL SPECIFICATIONS 21”W x 9”H x 17”D (53 cm x 24 cm x 43 cm); Weight: 35 lbs (15.8 Kg)
INPUT POWER 3 amps, 100 – 240 Vac, 50/60 Hz
TURNS-RATIO MEASURING RANGE 0.8 – 15,000 (5-digit resolution)
TURNS-RATIO ACCURACY 0.8 – 999: ±0.1%, 1000 – 1599: ±0.2%, 1600 – 9999: ±1%, 10,000 – 15,000: 1.5% @ 8 Vac
0.8 – 999: ±0.1%, 1000 – 1599: ±0.2%, 1600 – 9999: ±1%, 10,000 – 15,000: 1.5% @ 40 Vac
0.8 – 999: ±0.1%, 1000 – 1599: ±0.2%, 1600 – 9999: ±1%, 10,000 – 15,000: 1.5% @ 100 Vac
TEST VOLTAGES Three-phase, 8 Vac @ 1 Amp, 40 Vac @ 0.2 Amps, 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
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 up to 112 transformer test records. Each record holds the test record header and up to 33 readings.
INTERNAL TEST PLAN STORAGE Stores up to 128 transformer test plans. Test plans can be transferred to the unit from the PC via the RS-232C/USB port or via the USB Flash drive interface
SAFETY Designed to meet UL 61010A-1 and CAN/CSA C22.2 No. 1010.1-92 standards
ENVIRONMENT Operating: -10° to 50° C (15°F to +122° F); Storage: -30° C to 70° C (-22°F to +158° F)
CABLES One 15-foot single-phase set, One 15-foot three-phase set, One 25- foot extension set, One ground cable, One USB cable, One RS-232C cable, power cord, 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).
Last updated on February 16, 2009



Field Pictures

Tri-Phase at Electtromeccanica, Milan
Tri-Phase Demo at Wilson Transformer in Malaysia
EZCT and Tri-Phase at Eskom, South Africa
Tri-Phase and LTCA Testing at Rotex Engineering, South Africa
Tri-Phase at EGAT HV in Thailand
Tri-Phase at EGAT HV in Bangkok