Variable Frequency Series Resonant Test System High Voltage AC Hipot Tester for XLPE Cable, GIS, Transformer and Generator Withstand Voltage Testing

The Variable Frequency Series Resonant Test System is an advanced AC high-voltage testing solution for large-capacity and high-capacitance electrical equipment.

The system changes the output frequency to match the resonant frequency of the reactor and the test object's capacitance. Once resonance is achieved, the system can generate high AC test voltage efficiently.

This technology is particularly suitable for XLPE power cables, GIS, transformers, generators and other capacitive test objects. Current product pages commonly describe variable-frequency systems with output frequency ranges around 20–300 Hz, although the actual range should always be selected according to the specific model and application.

• Variable frequency AC withstand voltage test
• Cable AC hipot test
• GIS AC dielectric test
• Transformer AC withstand test
• Generator withstand voltage test
• Motor insulation test
• Busbar withstand voltage test
• Automatic frequency adjustment
• Automatic resonance search
• Automatic voltage boosting
• Test time control
• Real-time voltage and current monitoring
• Automatic protection
• Test data storage

Automatic Tuning
The system can automatically sweep the frequency and search for the resonance point.

High Efficiency
The resonant principle helps reduce the required input power for suitable capacitive test loads.

Portable Design
Compared with some conventional high-capacity AC test systems, the equipment can be configured in a more modular form for field applications.

Intelligent Protection
Typical protections can include overvoltage, overcurrent, flashover, zero-start and emergency stop functions.

Q: What is the difference between variable frequency resonance and conventional AC hipot testing?
A: Variable frequency resonance adjusts the output frequency to achieve resonance with the test circuit, which can reduce the required input power for high-capacitance test objects.

Q: Can it be used for different voltage levels?
A: Yes. Different configurations can be designed for different cable, GIS, transformer and generator voltage levels.