High Precision Variable Frequency Series Resonance Test System AC Withstand Voltage Testing Equipment for Power Cables & GIS Substations (300kVA-20000kVA)

The SXBP Variable Frequency Series Resonance Test System is an advanced high-voltage testing solution engineered specifically for AC withstand voltage testing of large-capacity, high-voltage primary electrical equipment. Designed in strict accordance with international standards (such as IEC and IEEE equivalents to DL/T8496-2004 and GB50150-2016), this modular system combines high-voltage reactors in parallel and series configurations. It effortlessly handles massive capacitive loads including long-distance high-voltage power cables, Gas-Insulated Switchgear (GIS), SF6 circuit breakers, power transformers, and potential transformers (CVT). By utilizing variable frequency tuning (20Hz–300Hz), it ensures low harmonic distortion (waveform distortion rate < 1%) and delivers pure sinusoidal output, making it the ultimate testing asset for power utilities, electrical contractors, and high-voltage manufacturing plants.

• AC Withstand Voltage Test for Power Cables: Safely tests long-distance XLPE insulated power cables with low power supply capacity requirements.

• GIS & SF6 Switchgear Testing: Performs rigorous dielectric strength and insulation performance evaluations under field conditions.

• Power Transformer & Mutual Transformer Testing: Evaluates main insulation integrity across frequencies ranging from 45Hz to 65Hz.

• Wide Frequency Tuning Range: Operates smoothly within 20Hz to 300Hz with high frequency adjustment sensitivity (0.1Hz, stability < 0.05%).

• Modular Reactor Combination: Flexible combination of epoxy-cast high voltage reactors to adapt to diverse voltage and current specifications (200kV to 2000kV).

• Q1: How does this resonant system reduce the required power supply capacity?

  • A1: By utilizing series resonance (XL = XC), the test transformer's power supply only needs to cover the active power loss of the system (P = S/Q). This allows a small-capacity power source (e.g., 300kVA) to test massive capacitive loads up to 20,000kVA, significantly reducing site power requirements and equipment weight.

• Q2: What safety protections are built into the SXBP system?

  • A2: The system features multiple safety layers including over-voltage protection, over-current protection, zero-start interlocking, flashover protection, and protective damping resistors to safeguard both operators and tested samples during sudden breakdowns.

Established in 2005, Sansion Power Electric comprises technical experts with over 20 years of experience in R&D, manufacturing, and marketing of power electrical testing products. Our solutions are widely applied across power electric, railroad, energy conservation and environment protection, water conservancy, petrochemical industry, aerospace, and other sectors.

Sansion Power Electric includes R&D department, instruments manufacturing workshop, HV workshop, sample exhibition room, HV testing laboratory, quality control department, general office, sales departments, and information office. We currently employ over 80 staff members, including 20 technical engineers.

We have obtained ISO9001 quality system certification, and all products strictly conform to international IEC and Chinese state standards.