High Voltage Variable Frequency Series Resonant AC Test System 20–300Hz for Power Cable, GIS, Transformer and Switchgear Testing

The SXBP Variable Frequency Resonance Test System is using variable-frequency series resonance technology, SXBP generates high AC test voltage by matching the resonant circuit to the capacitive load of the equipment under test.

It can be configured for applications involving power cables, transformers, GIS, switchgear, CT/PT and other high-voltage equipment up to 110 kV class, with system output configurations available up to 800 kV RMS.

• Variable-Frequency Power Supply
  The power supply generates adjustable-frequency excitation power and provides precise frequency control.
• Excitation Transformer
  The excitation transformer provides the required voltage conversion between the power supply and resonance circuit.
• Resonant Reactor
  The reactor provides the inductive component required to establish resonance with the capacitive test object.
• Capacitive Voltage Divider
  The divider measures the high-voltage output during the test and provides voltage monitoring.
• Control System
  The control system manages the test process and monitors operating parameters.

1. Manufacturing Facilities
   For routine and type-related AC withstand testing of electrical equipment.
2. Testing Laboratories
   For controlled high-voltage insulation testing and verification.
3. Power Projects
   For on-site testing during installation and commissioning.
4. Maintenance & Inspection
   For preventive testing of high-voltage equipment after maintenance or repair.

Q1:What is the SXBP Variable Frequency Resonance Test System used for?
It is used for high-voltage AC withstand testing of power cables, transformers, GIS, switchgear, CTs, PTs, insulators and other electrical equipment.

Q2:What is the maximum output voltage?
The system can be configured for up to 800 kV RMS, depending on the selected configuration.

Q3:What frequency range is available?
The standard output frequency range is 20–300 Hz.

Q4:Why is variable frequency important?
The capacitance of different test objects varies considerably. Variable-frequency operation allows the resonance point to be adjusted according to the characteristics of the load.

Q5:Can SXBP test long cables?
Yes. The system is suitable for AC withstand testing of medium- and high-voltage cables. Cable length and capacitance are important parameters for determining the appropriate configuration.