Automatic Computer Controlled Lightning Impulse Voltage Generator for Full Wave Chopped Wave Impulse Voltage Testing Laboratory Use

SXCY Series Impulse Voltage Generator is a high-voltage test system used to evaluate the insulation performance and protective characteristics of power equipment against lightning and switching overvoltages.

It is mainly applied to lightning impulse full-wave tests, lightning chopped-wave tests, and switching impulse voltage tests. The generator supports eight standard impulse waveforms for different testing requirements, including standard lightning, switching, oscillating, steep-front, and transformer induced switching waves.

The system is widely applicable to power equipment manufacturers, utilities, laboratories, and R&D institutions.

• The system features a complete supporting assembly covering various voltage grades. Its low-inductance return circuit and band-stop filtering design help maintain standard impulse waveforms under demanding high-capacity loads.
• With high voltage utilization, flexible waveform adjustment, and excellent synchronization, the system delivers stable and efficient operation. An automatic constant-current charging system reduces manual intervention while enhancing anti-interference performance.
• The integrated digital waveform analysis and online processing system further improve test accuracy, data analysis, and overall testing efficiency.

This test system is applicable to major HV equipment such as transformers, insulators, power cables, surge arresters, switchgear, CT/PT and bushings. Typical users include high-voltage laboratories, independent testing institutes, electrical manufacturers and power grid R&D centers, where it supports both type tests and routine production tests.

1. Why is an Impulse Voltage Test necessary?

   High voltage equipment can experience severe transient overvoltages caused by lightning or switching operations. Impulse voltage testing helps verify whether the insulation system can withstand these transient stresses before equipment is placed into service.

2. Which equipment requires impulse voltage testing?

   Typical test objects include:

   • Power transformers
   • High voltage cables
   • Insulators
   • Bushings
   • Surge arresters
   • Switchgear
   • CT and PT
   • Other high voltage power equipment
3. What is the difference between a lightning impulse test and a switching impulse test?

   A lightning impulse test simulates transient overvoltage caused by lightning, while a switching impulse test evaluates insulation performance under switching-related overvoltages. The required waveform and test voltage depend on the equipment and applicable standard.

4. What problems can occur during impulse testing?

   Large-capacity test objects may affect the generated waveform. A properly designed impulse generator therefore needs good load adaptability, low-inductance connections and effective waveform-shaping technology.