In modern power systems, ensuring the safety and reliability of electrical equipment is a top priority. High voltage equipment such as power cables, transformers, GIS, and generators requires strict insulation testing before operation and during maintenance.

Among various testing methods, the AC withstand voltage test is one of the most important procedures. The key equipment for this test is the Series Resonance Test System, which is widely recognized as an efficient solution for high voltage insulation testing.

A Series Resonance Test System uses the principle of electrical resonance to generate high AC voltage with relatively low power input.

By adjusting the output frequency of the variable frequency power supply, the reactor (L) and test object (C) reach resonance, allowing the system to produce high test voltage efficiently.

Compared with traditional power frequency test transformers, series resonance systems offer advantages such as:

• Smaller size and lighter weight
• Lower power supply requirements
• Better output waveform quality
• Higher testing efficiency and safety

This makes them especially suitable for on-site high voltage testing.

The SXBP Series Resonance Test System is designed for various AC withstand voltage testing applications.

It consists of:

• Variable frequency power supply
• Excitation transformer
• High voltage reactor
• Capacitive voltage divider
• Intelligent control system

Key features include:

✔ Wide voltage range for different equipment levels
✔ Modular design for easy transportation and installation
✔ Automatic frequency tuning for fast resonance adjustment
✔ Multiple protection functions for safe operation
✔ Real-time data display and automatic test report generation

The SXBP system is widely used for transformer testing, cable testing, GIS testing, power equipment commissioning, and maintenance inspection.

For equipment with strict insulation requirements, such as high voltage cables, GIS, transformers, and new energy electrical products, partial discharge testing is essential.

The No Partial Discharge Series Resonance Test System reduces interference through advanced shielding technology and optimized design, ensuring more accurate insulation evaluation.

Main advantages:

• Low partial discharge level
• Stable output waveform
• Strong anti-interference capability
• Compatible with partial discharge measurement systems

It is an ideal solution for high-standard laboratory testing and factory inspection.

Series Resonance Test Systems are widely applied in:

Power Cable Testing
Suitable for large-capacity XLPE cable AC withstand tests.

Transformer and GIS Testing
Used for insulation testing during manufacturing, commissioning, and maintenance.

Power Laboratories
Applied in high voltage research and electrical equipment development.

Industrial Power Systems
Supports preventive maintenance of high voltage equipment in industries such as energy, chemical, and metallurgy.

Compared with traditional high voltage testing equipment, series resonance technology provides:

Compact Design
Easy transportation and suitable for field testing.

Low Power Consumption
Requires much less input power while generating high test voltage.

Reliable Test Results
Provides a high-quality sinusoidal voltage output for accurate measurement.

Improved Safety
The system quickly reduces voltage when insulation failure occurs, protecting the tested equipment.

With its advantages of high efficiency, portability, intelligent control, and reliable performance, the Series Resonance Test System has become an important solution for modern high voltage insulation testing.

Sansion Power continues to provide advanced high voltage testing equipment, AC withstand test systems, and partial discharge testing solutions to help customers worldwide build safer and more reliable power systems.

Looking for a professional Series Resonance Test System for transformer, cable, or GIS testing? Contact Sansion Power for a customized solution.