CVT-765’s memory or a USB Flash drive), analyze test results, and print testresults on a desktop printer. Test results are automatically exported to PDF,EXCEL, and XML formats.

Operating VoltageThe CVT-765 can be operated from 100-120Vac or 220-240Vac. The propervoltage can be set using the voltage selection switch on the front panel.

CVT-765Capacitor Voltage Transformer Tester

Automatic Transformer Turns-ratio Tester

TM

• 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• Displays winding polarity and phase angle• Dimensions: 19.5” x 12” x 17” (49.5 cm x 30.5 cm x 43.2 cm)

CVT-765 with test cables Part No: CVT-765

FEATURES

Ordering Information

CVT-765Connections

The Vanguard CVT-765 is a microprocessor-based, single phase, automatic,transformer turns-ratio tester. This portable test unit is specifically designedto measure the turns-ratios of Capacitor Voltage Transformers (CVT’s). Theturns-ratios of Voltage Transformers (VT’s) and Potential Transformers(PT’s) can also be measured by the CVT-765.

The CVT-765 determines the transformer turns-ratio using the IEEEC57.12.90 measuring method. It uses a 7500Vac excitation voltage sourceto accurately measure the turns-ratio of Capacitor Voltage Transformerswith a rating of up to 765KV. The transformer turns-ratio is determined byprecisely measuring the voltages across the unloaded transformer windings.

The CVT-765 can measure the turns-ratios of Capacitor VoltageTransformers ranging from 75 to 15,000. The measured turns-ratio, wind-ing polarity, and winding phase angle are displayed on the unit’s LCD screen.

A transformer’s nameplate voltages can also be entered, and the CVT-765will display the turns-ratio percentage error by comparing the test resultswith the nameplate voltage values. This convenient feature eliminates anyuser-calculation errors when testing transformers.

User InterfaceThe CVT-765 features a back-lit LCD (128 x 64 pixels) screen that is view-able in bright sunlight and low-light conditions. A rugged 16-key membranekeypad is used to enter test information and to operate the unit.

Test Record StorageThe CVT-765 can store 128 records of 33 readings internally, and up to 999test records on an external USB Flash drive. Test records can be recalledusing the included Transformer Analysis PC Software.

Computer InterfaceA Windows® based (XP/Vista/7) Transformer Analysis Software is providedwith each unit and can be used to remotely control the CVT-765 via the RS-232C port. Using this software, the user can retrieve test records (from the

Accurately

Rugged 16-KeyMembrane Keypad

Power ReceptacleModule

RS-232CInterface

Connector forX Terminals

Phase Angle PercentageError

MeasuredRatio

USB Flash DriveInterface

ArmSwitch

H1 & H2Sensors

Note: The above specifications are valid at nominal voltage and ambient temperature of +25°C (+77°F). Specifications are subject to change without notice.

Portable, automatic, CVT, VT, PT turns-ratio tester19.5" x 12" x 17" D (49.5 cm x 30.5 cm x 43.2 cm); 65 lbs (29.5 kg)100-120 Vac or 220-240 Vac (selectable), 50/60 hzANSI/IEEE C57.12.9075 - 10,000 (5 digit resolution)75 - 4,999: ±0.25%, 5,000 – 9,999: ±0.35%, 10,000 - 15,000: ±0.5%0-360 degrees, ±0.2 degree accuracyIn-Phase or Out-of-Phase indication7440Vac @ 50maBack-lit LCD (128 x 64 pixels), viewable in direct sunlight and low light levelsRS-232CWindows XP/Vista/7® Transformer Analysis Software (included with purchase)128 test records. Each record contains 33 readings.Up to 999 test records on external USB Flash drive.Designed to meet IEC 61010A-1 and CAN/CSA C22.2 No. 1010.1-92 StandardsOperating: -10˚C to 50˚C (15˚F to +122˚F); Storage: -30˚C to 70˚C (-22˚F to +158˚F)90% RH @ 40˚ C (104˚ F) non-condensing2000m (6562 ft) to full safety specificationsOne 50 ft. H cable, one 15 ft. X cable, one power cable, one safety ground cableOne year on parts and labor

TypePhysical Specifications

Input PowerMeasuring Method

Ratio Measuring RangeTurns-Ratio AccuracyPhase Angle Reading

PolarityTest Voltage

DisplayComputer Interface

PC SoftwareInternal Test Record StorageExternal Test Record Storage

SafetyEnvironment

Humidity (Max)Altitude (Max)

CablesWarranty

SPECIFICATIONS

Vanguard Instruments CompanyReliability Through Instrumentation

RV Oct11

measure the turns-ratios of Capacitor Voltage Transformers (CVT's),Voltage Transformers (VT's), and Potential Transformers (PT's)

Back-lit LCD Display(128 x 164 pixel viewable in direct sunlight)

Test ResultsScreen

Vanguard Instruments Company, Inc.

Vanguard Instruments Co., (VIC), was founded in 1991.Currently, our 28,000 square-foot facility houses Administration,Design & Engineering, and Manufacturing operations. From itsinception, VIC’s vision was, and is to develop and manufactureinnovative test equipment for use in testing substation EHV circuitbreakers and other electrical apparatus.

The first VIC product was a computerized circuit-breaker analyz-er, which was a resounding success. It became the forerunner ofan entire series of circuit-breaker test equipment. Since its begin-ning, VIC’s product line has expanded to include microcomput-er-based, precision micro-ohmmeters, single and three-phasetransformer winding turns-ratio testers, winding-resistancemeters, transformer tap-changing controllers, megaohm resist-ance meters, and a variety of other electrical utility mainte-nance support products.

VIC’s performance-oriented products are well suited for the util-ity industry. They are rugged, reliable, accurate, user friendly, andmost are computer controlled. Computer control, with innovativeprogramming, provides many automated testing functions. VIC’sinstruments eliminate tedious and time-consuming operations,while providing fast, complex, test-result calculations. Errors arereduced and the need to memorize long sequences of procedur-al steps is eliminated. Every VIC instrument is competitivelypriced and is covered by a liberal warranty.

Vanguard products are available from:

Vanguard Instruments Company, Inc.1520 S. Hellman Ave. • Ontario, California 91761 USA • P 909-923-9390 • F 909-923-9391

www.vanguard-instruments.com