Variable Frequency High Voltage Resonant Test System For Power Cable / GIS / Transformer Commissioning Test

The SXBP High Voltage Variable Frequency Series Resonance Testing System is developed to address the challenges of AC insulation testing for large-capacity power equipment. It combines variable frequency control technology with series resonance principles to deliver high-voltage test output with excellent stability and flexibility. The system supports on-site withstand voltage testing of capacitive electrical equipment, including transformers, cables, GIS, and switchgear, helping utilities and testing organizations verify insulation reliability before commissioning or maintenance.

• Long-distance cross-linked power cables of 110kV, 220kV and 500kV
• GIS high-voltage combined electrical appliances, high-voltage coupling capacitors and CVT (Capacitive Voltage Transformer) up to 1000kV
• Power transformers (the test frequency is stably maintained between 45Hz and 65Hz)

1.Strong Compatibility: Reactors support flexible series and parallel connection. Wide ranges of voltage and capacity cover withstand voltage tests for most mainstream high-voltage equipment including cables, GIS, transformers and instrument transformers.

2.High-quality Waveform: Low sine wave distortion ensures accurate test data and truly simulates actual power-frequency withstand voltage assessment conditions.

3.Stable & Durable Operation: High quality factor and tiny frequency deviation; well-controlled temperature rise and noise under long-term full-load operation, suitable for both field construction sites and indoor substation environments.

4.Precise & Easy Operation: 0.1Hz high-precision frequency adjustment enables quick resonance point capture, lowering operation difficulty for field test engineers.

• Q1:What is a Variable Frequency Series Resonance Test System?

  A:A Variable Frequency Series Resonance Test System is an advanced high-voltage AC testing solution designed to generate stable high-voltage output through resonance technology. It is mainly used for insulation withstand tests of large-capacity electrical equipment, including power transformers, GIS, high-voltage cables, switchgear and other capacitive loads in power systems.

• Q2:What capacity range can the Variable Frequency Series Resonance Test System support?

  A:The system is available with a wide capacity range from 300kVA to 20000kVA, covering different testing requirements from laboratory verification to large-scale field commissioning. The reactor combination, excitation transformer and control system can be configured according to the voltage level and capacitance characteristics of the tested equipment.

• Q3:What is the frequency adjustment range of the system?

  A:The Variable Frequency Series Resonance Test System supports an adjustable output frequency range of 20Hz–300Hz. By precisely adjusting the resonance frequency, the system can achieve efficient energy conversion, reduce power requirements and provide stable AC withstand voltage during testing.

• Q4:Which electrical equipment can be tested with this resonance system?

  A:This system is suitable for AC withstand voltage testing of various high-voltage electrical equipment, including power transformers, GIS, high-voltage cables, switchgear, bushings and other capacitive loads. It is commonly applied in power plants, substations, transmission projects and equipment manufacturing facilities.

• Q5:Can the resonance test system be customized for specific testing projects?

  A:Yes. The system can be engineered according to specific project requirements, including rated test voltage, output capacity, reactor combination, test object characteristics and installation conditions. Customized solutions help ensure compatibility with different voltage classes and field testing environments.