ZXCJV-800kV/40kJ Fully Automatic Impulse Voltage Generator: Ideal for High-Performance Lightning Impulse Testing

The ZXCJV-800kV/40kJ Fully Automatic Impulse Voltage Generator is a complete system designed specifically for full-wave lightning impulse voltage testing of high-voltage electrical equipment (such as ring main units, circuit breakers, load switches, composite insulators, etc.) at 110kV and below. The device has a rated voltage of 800kV and a nominal energy of 40kJ, meeting the requirements for impulse testing in national and industry standards such as GB/T 16927.1.

The generator body adopts the SGS series main circuit design from HAEFELY GmbH, Switzerland, achieving a highly compact structure. The system has 8 stages, each with a voltage of 100kV and a capacity of 5kJ. Each stage uses a 1.0μF/100kV dry-type fully insulated solid dielectric capacitor, characterized by low inductance, light weight, and no risk of oil leakage. Under normal operating conditions, the casing deformation is less than 1mm.

A ball-triggered mechanism is used to achieve non-polarity triggering, with a trigger range greater than 20%, fast and accurate positioning, and minimal wear. The wavefront and wave-tail resistors utilize a non-inductive wound plate structure with constantan wire, externally vacuum-cast with insulating resin. The connectors are 3mm stainless steel spring-pressed, ensuring reliable contact and a smooth output waveform. The system is equipped with three sets of tuning resistors and one set of charging and protection resistors, possessing sufficient heat capacity to support long-term continuous operation.

The core control system employs the ZX-CS-2020 fully automatic control system, based on a programmable logic controller (PLC). Control signals and status feedback are transmitted via two-core fiber optic cables, effectively isolating electromagnetic interference. The system supports manual, automatic, and programmable control, and features thyristor voltage regulation, constant current charging (voltage stability 0.5%), automatic ball gap adjustment, LCD display of charging voltage (accuracy 1%), and fault protection functions.

The measurement system employs the DIMS-6000 digital impact measurement system, equipped with a high-speed digital acquisition card (sampling rate 1.0GS/s, bandwidth 100MHz, 8-bit resolution, 2 channels, 10K record length per channel), and a ZXCR-800kV/800pF weakly damped capacitive voltage divider (partial response time <100ns, overshoot <10%, voltage divider ratio uncertainty <1%) and a dedicated attenuator to achieve accurate acquisition and analysis of impact waveforms.

The system features an automatic electromagnet grounding mechanism that grounds the first-stage capacitor through a grounding resistance (≤0.5Ω). The grounding operation is interlocked with the charging control, and it incorporates overcurrent and overvoltage protection, as well as isolation filtering and shielding design to ensure the safety of equipment and operators.

Application Scenarios
This system is widely used by power equipment manufacturers, third-party testing institutions, research institutes, and other organizations. It is suitable for verifying the insulation performance of various power equipment, including transformers, high-voltage switchgear, ring main units, circuit breakers, load switches, and composite insulators. It can perform type tests, factory tests, and research tests, providing reliable assurance for the safe operation of power equipment.

The complete system configuration includes key components such as a rectifier charging power supply, a capacitor voltage divider, a measurement and control system, and a tuning resistor group. With a design life exceeding 20 years, it is an ideal choice for high-voltage impulse testing.