High-voltage hipot tester

Product introduction
The UHV(V) Lightning Impulse Test System reproduces controlled lightning-type high-voltage, high-current transients to verify insulation strength and transient response of high-voltage equipment. The system integrates an HV power supply, energy-storage capacitors and a controlled discharge network to deliver repeatable full-wave, truncated and steep impulses for type and routine testing.

Key features

• Low-circuit inductance with resistive filtering to maintain standard impulse waveforms under high capacitance and heavy load.
• High voltage utilization: typical lightning and operating wave factors ≥85% and ≥80% respectively.
• Adjustable waveforms, synchronized triggering and programmable impulse sequences for repeatable tests.
• Constant-current automatic charging control for high automation and strong EMI immunity.
• Optional truncation and steepening modules and oscilloscope/acquisition support; output stability >99%.

Structural composition
The system comprises a generator module, optional truncation/steepening device, voltage divider, control console (microcomputer or standard panel), digital waveform recording/acquisition system and protection units. The console sets charge voltage, charge time and impulse count while the acquisition system records and validates waveforms.

Application scenarios

• Power equipment manufacturers: type and factory tests for transformers, insulators, circuit breakers and HV switches.
• Third-party testing and certification laboratories: standardized insulation testing and reports for grid access and compliance.
• High-voltage laboratories, universities and research centers: materials testing, insulation R&D and lightning-protection studies.

Technical parameters (selected)

• Charging voltage: setting range 0–100 kV; typical working range 10.0–100.0 kV; setting deviation ≤±1%; instability ≤±1%; resolution 0.1 kV.
• Charging time: 30–180 s (resolution 1 s); alarm delay 2 s.
• Number of impulses: programmable 1–999.
• Protections: configurable overcurrent and overvoltage; dynamic charge protection optional.
• Output impulse stability: >99%.
• Generator variants: examples from 100 kV/5 kJ up to 800 kV/80 kJ with options for truncation, steepening and oscilloscope/acquisition depending on waveform requirements (standard 1.2/50 μs, operating 250/2500 μs, truncated 2–6 μs, steep waves).