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ISO 9001 and 17025 Certified



Capacitor Voltage Transformer Tester

9025-UC [CVT-765]
The Vanguard CVT-765 is a microprocessor-based, single phase, automatic, transformer turns-ratio tester. This portable test unit is specifically designed to measure the turns-ratios of Capacitor Voltage Transformers (CVT’s).
The CVT-765 determines the transformer turns-ratio using the IEEE C57.12.90 measuring method. It uses a 7440 Vac excitation voltage source to accurately measure the turns-ratio of Capacitor Voltage Transformers with a rating of up to 765KV. The transformer turns-ratio is determined by precisely measuring the voltages across the unloaded transformer windings.
  • Standalone or computer-controlled
  • Can test CVT's rated up to 765 KV
  • Displays turns-ratios from 75-15,000
  • Calculates turns-ratio percentage error when nameplate voltages are provided





Technical Specifications

TYPE Portable, automatic, CVT turns-ratio tester
PHYSICAL SPECIFICATIONS 19.5" x 12" x 17" D (49.5 cm x 30.5 cm x 43.2 cm)
INPUT POWER 100 – 120 Vac or 220 – 240 Vac (selectable), 50/60 Hz
RATIO-MEASURING RANGE 75 – 15,000 (5 digit resolution)
TURNS-RATIO ACCURACY 75 - 4,999: ±0.25%, 5,000 – 9,999: ±0.35%, 10,000 - 15,000: ±0.5%
PHASE ANGLE READING 0-360 degrees, ±0.2 degree accuracy
POLARITY In-Phase or Out-of-Phase indication
TEST VOLTAGE 7440Vac @ 50ma
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 test records. Each record contains 33 readings.
EXTERNAL TEST RECORD STORAGE Up to 999 test records on external USB Flash drive.
SAFETY Designed to meet IEC 61010A-1 and CAN/CSA C22.2 No. 1010.1-92 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 50 ft. H cable, one 15 ft. X cable, one power cable, one safety ground cable
WARRANTY One year on parts and labor
Specifications are valid at nominal voltage and ambient temperature of +25˚C (+77˚F).



Field Pictures

CVT Testing at PLN, Indonesia
CVT-765 Testing in Danang, Vietnam
CVT-765 Testing in Danang, Vietnam
CVT-765 Testing at EGAT HV in Thailand
CVT-765 at Chesf, Recife, Brazil
CVT-765 at Electrobras, Belem, Brazil
500 KV CVT Test in Recife, Brazil
CVT-765 at CHESF Substation in Recife, Brazil