Lightning Impulse Test System

UHV lightning impulse test system is mainly used for conducting impulse voltage tests of lightning impulse voltage full wave, lightning impulse voltage cutoff, and operation impulse voltage wave on test samples such as power equipment, to test insulation performance. With the development of power technology, the types of samples that require impulse voltage testing are increasing day by day. A lightning impulse test system is a high-voltage generating device that generates lightning impulse voltage waves, operational overvoltage waves, and other pulse waves. It is a basic testing equipment in high-voltage laboratories. 

UHV typical lightning impulse test system includes:

HV DC power supply: Provides stable charging voltage (U₀) (e.g., HV rectifier or DC generator).

Charging resistors: Limit charging current (charging phase) and isolate stages (discharge phase).

Stage capacitors: Core energy storage elements (high-pulse capacitors with low inductance/loss).

Sphere gaps: Fast switches for parallel/series transition (require stable breakdown, fast action, high current capacity).

Wavefront resistor (Rf): Controls voltage rise rate (low-inductance design; wire/water resistors).

Wavetail resistor (Rt): Controls voltage decay rate (high-value, low-inductance resistors).

Voltage divider: Scales down output voltage for measurement (requires fast response, accurate ratio; types: resistive, capacitive, mixed).

Measurement system: Digital oscilloscopes, peak voltmeters, etc.

Trigger system: Generates precise pulses to initiate first-gap breakdown.

Control & protection system: Manages operation (charge/trigger/discharge/grounding), monitoring, safety interlocks.

Grounding system: Ensures safety.

Mechanical structure: Insulator columns, frame, corona rings/shields for support and field control.

1. Application in power system
Transformer insulation test
Case introduction: During the acceptance inspection of a new substation, a power company used the lightning impulse test system to perform lightning impulse withstand tests on the main transformer. Through multiple tests, it was confirmed that the transformer could operate normally within the specified voltage range, thereby ensuring the safe and stable operation of the power grid.
Application effect: This test helps power companies detect and solve potential insulation problems in advance, reducing power outages caused by lightning strikes.
Cable lightning impulse resistance test
Case introduction: Before laying new underground cables, a city power company conducted a lightning impulse test on them. Using the lightning impulse test system to simulate lightning conditions, the test results show that the cable can withstand the expected voltage impulse.
Application effect: Through testing, the quality of newly laid cables has been ensured, improving the reliability of the entire power system.

2. Performance evaluation of lightning arrester
Performance testing of lightning arrester
Case introduction: A certain lightning protection equipment manufacturer used a lightning impulse voltage generator to evaluate the performance of lightning arresters during the development of their new products. By simulating lightning strikes of different intensities, the protective effect of lightning arresters under special conditions was verified.
Application effect: The test results show that the lightning arrester can effectively protect electrical equipment under high voltage impact, enhancing the market competitiveness of the product.
Aging test of lightning arrester
Case introduction: A certain power company conducted aging tests on its lightning arrester that has been in service for many years, using a lightning impulse voltage generator to simulate the long-term impact of lightning strikes. The test results show that the performance of some lightning arresters has decreased and needs to be replaced.
Application effect: Through regular aging tests, power companies can promptly detect and replace lightning arresters with decreased performance, ensuring the safe operation of the power grid.

3. Application in scientific research experiments
Research on New Insulation Materials
Case introduction: A research team from a certain university used the lightning impulse test system with high-precision control function to study the lightning impulse resistance performance of a new insulation material. Through multiple experiments, a large amount of data has been obtained, providing a basis for further improving the material.
Application effect: This research has promoted the development of new insulation materials and improved the lightning resistance of power equipment.
Optimization of High Voltage Equipment Design
Case introduction: A power equipment manufacturing enterprise tested different design schemes using the lightning impulse test system during its product design phase. By comparing the test results of different schemes, the best design scheme was ultimately chosen.
Application effect: The optimized design scheme significantly improves the product's lightning resistance and enhances its market competitiveness.

Is the measuring system compliant with IEC 61083?

Yes.

Our digital measuring system is developed and calibrated in accordance with IEC 61083 requirements.

It is widely used by:

High-voltage laboratories

Transformer manufacturers

Independent testing organizations

Research institutes

The system accurately measures:

Peak voltage

Front time

Tail time

Oscillation parameters

Overshoot characteristics

Chopping parameters

What types of lightning impulse test system can be tested?

The UHV Lightning Impulse Test System is suitable for testing:

Power transformers

Distribution transformers

Current transformers (CTs)

Voltage transformers (PTs)

High-voltage bushings

Surge arresters

Insulators

GIS equipment

Circuit breakers

Power cables

Rotating machines such as generators and motors

The system can be tailored to match the voltage level and capacitance of the test object.

Is fully automatic operation available?

Yes.

Our intelligent control system supports:

Automatic charging

Automatic triggering

Automatic grounding

Automatic polarity reversal

Automatic test sequence execution

Automatic report generation

This helps improve testing efficiency and minimizes manual intervention.

What safety features are built into the lightning impulse test system?

Safety is a top priority in every UHV lightning impulse test system.

Standard protection features include:

Emergency stop system

Grounding interlocks

Safety door interlocks

Overvoltage protection

Overcurrent protection

Automatic discharge circuit

Audible and visual warning alarms

These safeguards help protect both operators and equipment during testing.

Can the software automatically analyze impulse waveforms?

Yes.

The software automatically calculates and evaluates:

Peak voltage

Front time

Tail time

Chopping time

Overshoot percentage

Oscillation characteristics

Pass/fail test results

Reports can be exported in PDF, Excel, or customized formats.

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