Description

Technical Parameters

Product Overview & Applications

A 600kV / 30kJ Lightning Impulse Generatoris a high-voltage test system designed to simulate the effects of lightning strikes on electrical equipment by generating extremely short-duration, high-power electrical pulses. It is used to verify that high-voltage components like transformers, insulators, and arresters can withstand these transient overvoltages without failing.

Application:

1. Power Transformer Manufacturing: Every new power transformer design must pass a BIL test before being certified for use.
2.High-Voltage Bushing and Insulator Manufacturing: Bushings (the insulated connectors that bring power into a transformer or circuit breaker) and long-rod insulators are directly exposed to atmospheric overvoltages
3.Gas-Insulated Switchgear (GIS) and Circuit Breaker Production:GIS assemblies contain several components (breakers, disconnectors, busbars) in a sealed environment. The integrity of the insulation between these components is vital.
4.Surge Arrester and Protective Device Manufacturing:This is a critical test for the devices designed to protectother equipment from lightning strikes. It's a performance verification test.
5.Cable and Accessory (Joint, Termination) Manufacturing:While longer cables are often tested with AC or VLF, the lightning impulse test is a crucial type test for the cable's design and its accessories (joints and terminations).
6.Independent High-Power and High-Voltage Test Laboratories::Many manufacturers do not have an in-house impulse generator of this size. They send their products to independent test labs for certification.

Key Features & Advantages

1.High-Voltage & High-Energy Core Features:600kV Peak Output Voltage:Capable of generating impulses up to 600 kilovolts, suitable for testing equipment rated for 245kV, 400kV, and 550kV systems. This voltage is sufficient to meet the Basic Impulse Level (BIL) requirements for these classes.
2.Waveform Generation & Control Features:recise Waveform Shaping;Digital Triggering System;Multi-Waveform Capability;Full Lightning Impulse;Chopped Lightning Impulse;Switching Impulse;Polarity Switching.
3.System Design & Usability Features:Modular & Scalable Design;Remote Control & Monitoring;Integrated Digital Measurement System;Voltage Efficiency.
4.Safety & Protection Features:Grounding System:;Automatic Discharge;Safety Interlocks:Door/Gate Interlocks;Grounding Interlocks;Emergency Stop Buttons:Current Relay Protection.
5. Additional Advanced Features: Current Relay Protection;Portable or Mobile Design;Data Logging and Reporting.

Operating Conditions

4. Standard Operational Workflow

Planning and Calculation:

Determine the test voltage and number of impulses per the standard (e.g., IEC 60060-1).

Calculate the required Rf and Rt resistor values based on the test object's capacitance.

Setup and Grounding:

Establish the safety perimeter and post warning signs.

Install the test object and connect the grounding system first.

Connect the wave-shaping resistors and the high-voltage lead.

Connect the voltage divider and measuring system.

Safety Verification:

The lead operator confirms all personnel are outside the perimeter.

Verify all gates are closed and interlocks are engaged.

Remote Operation from Control Room:

Close the charging circuit and raise the charging voltage to the desired level (e.g., 100kV per stage for 600kV total).

Initiate the impulse via the trigger system.

Waveform Capture and Analysis:

The waveform is captured on a digital recorder or oscilloscope.

Analyze the waveform parameters (front time, time to half-value) to ensure they are within standard tolerances.

Post-Test Safety Sequence (CRITICAL):

After the test series, the system will begin an automatic discharge.

Before re-entry,the operator must manually apply a grounding rod to the high-voltage output terminal and the test object.

Only after grounding is verified can the safety perimeter be opened for disassembly

Maintenance & Troubleshooting (FAQ)

Q: What is this machine, and what is its primary job?

A: It is a high-voltage surge simulator. Its primary job is to generate an extremely short, high-power electrical pulse that mimics a lightning strike. It is used to test if high-voltage equipment (like transformers and insulators) can withstand these extreme events without failing, ensuring the reliability of the power grid.

Q: What do the "600kV" and "30kJ" specifications mean?

A: 600kV (600,000 Volts):This is the peak voltagethe generator can produce. It determines the stress level you can apply, suitable for testing equipment rated for 245kV to 550kVsystems.

30kJ (30,000 Joules):This is the stored energy. It indicates the generator's "power" or ability to test large equipment with significant electrical capacitance (like big power transformers) without the test pulse distorting.

Q: What specific equipment is this generator used to test?

A: It is designed for Basic Impulse Level (BIL) testson critical extra-high-voltage (EHV) components, including:

Large Power Transformers(245kV, 400kV, 550kV class)

Gas-Insulated Switchgear (GIS)

High-Voltage Bushings and Insulators

Surge Arresters(to verify their performance)

Q: Can it also test switching surges?

A: Yes.Most modern impulse generators are versatile. By reconfiguring the internal wave-shaping resistors, they can produce a Switching Impulsewaveform (e.g., 250/2500 µs), which is a slower, longer surge that occurs from operations within the power grid.

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Technical Specifications

1.Nominal stage : Can be customized,such as 300kV, 600kV, 1200kV, etc.
2.Rated voltage stage: Normally :100kV
3.Rated Charging voltage: Normally :100kV
4.Nominal energy: Can be customized,such as 10KJ, 20KJ, 30KJ, etc.
5.Total impact capacitance: Can be customized according to tested object
6. waveform also could be customized except regular waveform shapes.

1.Nominal stage : Can be customized,such as 300kV, 600kV, 1200kV, etc.

2.Rated voltage stage: Normally ±100kV

3.Rated Charging voltage: Normally ±100kV

4.Nominal energy: Can be customized,such as 10KJ, 20KJ, 30KJ, etc.

5.Total impact capacitance: Can be customized according to tested object

6.Impulse voltage waveform parameters

1) Standard lightning impulse voltage full wave:1.2±30%ms /50±20%ms,The amplitude is ±3%, The oscillation at the wave head is not more than 5% of the amplitude

2) Standard operating impact waveform

250±20%ms /2500±60%ms;Chopper waveform time :2~6mS

3)Impulse voltage waveform: Impulse voltage waveform>10%Un, synchronizing range ≤20%,Instability rate of output voltage ≤1.5%,Error rate of synchronous discharge <2%

600kV/30kJ Lightning Impulse Set