High-voltage hipot tester UHV Lightning Impulse Voltage Generator

portable

Product Introduction
The Impulse Voltage Test System UHV(V) is a complete test solution designed to reproduce high-amplitude transient voltages for laboratory and field use. It supports full-wave, chopped-wave and switching impulse tests and is applicable to GIS, insulators, transformers, bushings, HV apparatus, circuit breakers, load switches and ring-main units.

Technical Advantages

• Low-inductance circuit design with resistive filtering to maintain standard impulse waveforms under large capacitive loads.
• High voltage utilization: lightning impulse utilization ≥85% and switching impulse utilization >80%.
• Operator-oriented features: simple waveform adjustment, intuitive controls, programmable sequences and reliable synchronization.
• Advanced charging control: constant-current automated charging with high automation level and strong EMI immunity.

Product Parameters
Charging voltage — Setting range: 0~800 kV
Operating range: 10.0~800.0 kV
Setting deviation: ≤±1%
Instability degree: ≤±1%
Setting resolution: 0.1 kV
Charging time — Setting range: 30~180 s
Charging time resolution: 1 s
Alarm delay: 2 s
Number of pulses — Setting range: 1~999
Protection settings — Overcurrent/overvoltage: configurable; Dynamic charge protection: optional

Typical configuration

• Lightning impulse voltage generator body: core unit generating high-voltage impulse waveforms.
• Low-damping capacitive voltage divider: high-accuracy impulse voltage measurement (e.g. up to 1.0%).
• Computer-based fully automatic control system: automates test sequences and records data.
• Fully automatic digital measurement and analysis system: processes measurements and generates detailed test reports.
• Wave-adjusting resistors and accessories: tune waveform parameters to test requirements.
• Automatic rectification charging power supply: provides stable charging to capacitors.

Key application areas

• Type and factory testing of high-voltage equipment (transformers, GIS, bushings) according to national standards.
• Power research and test institutes, third-party labs and universities for insulation material research and equipment verification.
• Handover and sampling inspection on transmission and substation projects to evaluate long-term operational reliability.
• Performance testing of overvoltage protection devices (e.g. surge arresters) under impulse conditions.

Frequently Asked Questions

• Q1: How to proceed if test data are not qualified?
  A1: Check wiring and eliminate environmental interference, then retest. If still not qualified, escalate for equipment inspection.
• Q2: Can the system test GIS equipment?
  A2: Confirm interface compatibility and measurement range; some GIS installations require dedicated adapters.
• Q3: Is discharge required after tests?
  A3: Yes. Fully discharge the tested item with a discharge rod before removing connections.
• Q4: Can the device be used near live equipment?
  A4: No. Only connect once the tested equipment is de-energized, verified and grounded.
• Q5: What is battery life?
  A5: Approximately 4–6 hours continuous operation when fully charged; prepare backup batteries or external power if needed.
• Q6: Does temperature affect measurements?
  A6: Yes. Use within ambient range 5 ℃ to 40 ℃; extreme temperatures may introduce deviations.

Characteristics / technical specifications

• Charging voltage range: 0~800 kV; operating range: 10.0~800.0 kV; resolution 0.1 kV.
• Setting deviation: ≤±1%; instability degree: ≤±1%.
• Charging time range: 30~180 s; resolution 1 s; alarm delay 2 s.
• Number of pulses: 1~999 (configurable).
• Protection settings: configurable overcurrent and overvoltage protection; dynamic charge protection selectable.
• Design: low-inductance circuit, resistive filtering, constant-current charging control and high automation.