Partial Discharge Free AC Withstand Voltage Test System

Utilizing advanced SF6 gas-insulated transformer technology, the Partial Discharge Free AC Withstand Voltage Test System provides stable 250kV output with an overall partial discharge level of ≤5pC. Featuring intelligent automatic control, reactive power compensation, low-noise operation, and comprehensive protection functions, it is ideal for power utilities, industrial enterprises, universities, research institutes, and high-voltage laboratories.

As power industries keep raising standards for insulation inspection and micro partial discharge detection, this testing unit is developed to match such market demands. Unlike conventional oil-filled test transformers, SF6 insulation removes risks of oil spills and pollution, while cutting overall equipment weight by 20% to 60% for easier transport and placement.

All these reliable performances are supported by professional manufacturing strength.Weshine® is a modern high-tech factory specializing in the research and development, production, sales and service of power system automation devices and test instruments.The products are sold worldwide and have received positive feedback from many customers.

Performance

The Partial Discharge Free AC Withstand Voltage Test System adopts SF6 gas insulated transformers to maintain stable 250kV output, limiting whole-set partial discharge to ≤5pC. Intelligent automatic control, reactive power compensation, low noise and multi-layer safety protection make it a practical choice for power factories, industrial clients, universities and research labs.

The entire machine’s partial discharge index hits ≤5pC, and the built-in SF6 transformer only generates ≤3pC partial discharge under rated voltage. Such excellent insulation performance makes it ideal for partial discharge inspection, factory acceptance checks, insulation verification and various high voltage research tasks.

Structure

The complete package includes SF6 insulated test transformer, coupling capacitor, high voltage current-limiting reactor, low voltage compensation reactor, isolation transformer and fully automatic control cabinet. Low voltage compensation technology cuts input power consumption by up to 60%, which greatly boosts test efficiency and lowers power supply requirements.

Control

The Partial Discharge Free AC Withstand Voltage Test System is equipped with a 7-inch color touch screen control unit that supports both automatic and manual operation modes. Operators can set five separate voltage segments, adjust boost speed and hold time freely. Automatic functions cover voltage lifting, compensation switching, timing, pressure relief after testing, data storage, record lookup and test report printing.

Safety

To guarantee stable and safe operation, the equipment outputs smooth sine wave voltage with waveform distortion below 5% and running noise under 65dB. Overvoltage and overcurrent protection mechanisms are fully equipped. Its modular framework supports later upgrades, expandable for ultra-high voltage testing up to 1200kV.

Features

1、SF6 gas-insulated transformer technology

2、Oil-free design with no environmental contamination

3、Complete system partial discharge level ≤5pC

4、Transformer partial discharge level ≤3pC

5、Rated output voltage up to 250kV

6、Rated capacity 50kVA

7、Reactive power compensation reduces input current by up to 60%

8、Automatic and manual testing modes

9、Five-stage programmable voltage and timing settings

10、Adjustable voltage ramp rate

11、Intelligent voltage regulation and compensation switching

12、Historical data storage and report printing

13、Stable sine-wave output with distortion ≤5%

14、Low operating noise ≤65dB

15、High-voltage overvoltage protection

16、Tail-current overcurrent protection

17、Suitable for partial discharge and AC withstand voltage testing

Applications

1、Transformer AC Withstand Voltage Testing

2、GIS Partial Discharge Testing

3、Switchgear Insulation Testing

4、High Voltage Cable Testing

5、Bushing Testing

6、Insulator Testing

7、Factory Acceptance Testing (FAT)

8、High Voltage Laboratory Testing

9、Electrical Equipment Type Testing

10、Preventive Maintenance Programs

Weshine Advantages

Weshine Electric is a professional manufacturer of high-voltage testing equipment and partial discharge measurement systems. Our VS-W series Partial Discharge Free AC Withstand Voltage Test Systems combine advanced SF6 insulation technology, ultra-low partial discharge performance, intelligent automation, and reliable safety protection. Designed for demanding laboratory and field applications, Weshine solutions help customers improve testing accuracy, ensure regulatory compliance, and enhance long-term equipment reliability.

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