Variable Frequency Resonant Withstand Voltage Test System 





Product Introduction;



In response to the large number and heavy workload of on-site withstand voltage tests for power equipment at voltage levels 220kV and below, our company has specially developed the latest portable field-use variable frequency resonant withstand voltage test system in China..



 The single-piece weight of each component in this complete system does not exceed 38kg, allowing manual handling without the need for on-site lifting equipment. Tests can be conducted directly using standard power outlets. The lightweight and compact reactors and excitation transformers are dry-type epoxy cast, sturdy and aesthetically pleasing, easy to stack, safe and reliable, and can completely replace traditional test methods such as power frequency test transformers. It is suitable for AC withstand voltage tests on various medium-voltage cables, GIS, power transformers, instrument transformers, circuit breakers, and other power equipment.





Scope of Application:




① Power frequency AC withstand voltage tests for 10kV/35kV/66kV/110kV/220kV main transformers;

 


② AC withstand voltage tests for 110kV/220kV GIS, SF6 switches, and CT instrument transformers;

 


③ AC withstand voltage tests for 10kV/35kV/66kV/110kV cables;

 


④ Power frequency AC withstand voltage tests for 10kV/35kV/110kV/220kV circuit breakers, disconnectors, bushings, insulators, motors, and other power equipment






Technical Parameters





1. Power supply voltage: 380V or 220V (≤10kW)



2. Maximum output voltage: 500kV



3. Maximum output capacity: 500kVA



4. Operating frequency range: 30Hz~300Hz or 45Hz~65Hz




5. Frequency adjustment resolution: 0.01Hz



6. Output waveform: sine wave, with waveform distortion rate ≤1%



7. Frequency adjustment sensitivity: 0.1Hz, with instability ≤0.05%



8. System quality factor: 20~60



9. The system has fully automatic protection against overvoltage, overcurrent, discharge, etc.