High Voltage Test System for 220kV Transformer , 110kV Substation Equipment and High Voltage Insulation Testing

The SXBP Variable Frequency Series Resonance Test System is a modular high-voltage AC testing solution developed for insulation withstand verification of electrical equipment with high voltage ratings and significant capacitive loads.

System Architecture

Variable-Frequency Power Supply
Provides controlled excitation power and adjustable output frequency.

Excitation Transformer
Transfers and matches the excitation voltage required by the resonant circuit.

Resonant Reactor
Forms the core resonant element and works with the capacitance of the test object.

Protection Inductor
Provides additional protection and assists in controlling the test circuit.

Compensation Capacitor
Supports reactive compensation and helps establish the required resonant condition.

Control & Protection System
Provides centralized operation, monitoring and protection during the high-voltage test.

Typical Test Objects

• Power Cables
  Suitable for AC withstand testing of 110 kV, 220 kV, 500 kV and other HV/EHV cable systems.
• GIS
  Designed for AC insulation withstand testing of GIS and SF6-insulated equipment during manufacturing, installation and commissioning.
• Power Transformers
  Can be configured for high-voltage AC testing of power transformers according to their test voltage and electrical characteristics.
• Circuit Breakers & Switchgear
  Applicable to AC withstand testing of high-voltage circuit breakers, switchgear and associated insulation systems.
• CT, VT & CVT
  Can also be used for applicable AC insulation testing of instrument transformers and capacitive voltage transformers.

Technical Data

FAQ

What does the SXBP system test?
It is mainly used for high-voltage AC withstand and insulation testing of equipment such as power cables, GIS, transformers, circuit breakers and other HV electrical apparatus.

Why is resonance technology suitable for cable testing?
Power cables have distributed capacitance, which can create a significant capacitive load during AC testing. Series resonance technology works with this capacitance to establish a resonant circuit and generate the required high-voltage output efficiently.

Can the system be used for underground cable projects?
Yes. The SXBP series is suitable for high-voltage and EHV underground cable testing, including long-distance cable systems.

What voltage classes can be tested?
The system can be configured from 200 kV to 2000 kV, depending on the required testing conditions.

What capacity is available?
The available rated capacity range is 300 kVA to 20,000 kVA.