High Voltage Variable Frequency Resonant Test System for AC Withstand Testing of Transformers, Cables, GIS and Substation Equipment

General Information

The SXBP Variable Frequency Series Resonance Test System is a high-voltage AC test solution developed for insulation withstand testing of large-capacity electrical equipment. Combining a variable-frequency power source with resonant reactors, an excitation transformer and a dedicated control system, the SXBP series provides a flexible solution for demanding HV and EHV AC withstand test applications.

Complete System Architecture

Technical Specifications

Application Areas

1. High-Voltage Cable Testing
The SXBP series is suitable for AC withstand testing of HV and EHV cable systems.
Typical applications include:

• 110 kV power cables
• 220 kV power cables
• 500 kV power cables
• Underground transmission cables
• Newly installed cable systems
• Cable commissioning and acceptance testing

For long cable systems, the equipment configuration can be selected according to the cable capacitance and required test voltage.

2. GIS AC Withstand Testing
GIS equipment contains multiple insulation structures and can present significant capacitive characteristics during AC testing.
SXBP provides a configurable high-voltage AC source for:

• GIS insulation testing
• GIS installation acceptance
• GIS commissioning
• Factory testing
• High-voltage withstand verification

3. Transformer Testing
The system can be configured for applicable high-voltage AC testing requirements of power transformers and related insulation systems.
It is suitable for manufacturers, testing laboratories and power projects requiring specialized AC high-voltage testing equipment.

4. SF6 Circuit Breaker Testing
The SXBP platform can be applied to high-voltage insulation withstand testing of SF6 circuit breakers and associated switchgear equipment.

5. CT, VT & CVT Testing
The system can also be configured for insulation testing of current transformers, voltage transformers, capacitive voltage transformers and other primary high-voltage equipment.

FAQ

Q:What is a variable frequency resonance test system?
It is an AC high-voltage testing system that uses a variable-frequency source and resonant circuit to generate the required test voltage, particularly for capacitive test objects.

Q:What can the SXBP system test?
It can be configured for HV/EHV cables, GIS, SF6 circuit breakers, transformers, CTs, VTs, CVTs and other applicable high-voltage equipment.

Q:What is the maximum voltage of the SXBP series?
The rated voltage range extends from 200 kV to 2,000 kV, depending on the system configuration.

Q:What is the frequency range?
The output frequency range is 20–300 Hz.

Q:What capacity range is available?
The SXBP series covers 300–20,000 kVA.