Description

Technical Parameters

Product Overview & Applications

The HMCJ-400kV/20kJ Lightning Impulse Voltage Generator adopt epoxy pillar tower structure, the stage voltageis 100 kV. lmpulse voltage generator hasadvanced technical index, compact structureand beautiful appearance.

Application:

1. Power Equipment Manufacturing: Primary test subjects: Power transformers, high-voltage switches, instrument transformers, insulators, surge arresters, cables, etc.

2. Transmission and Distribution Systems (Power Companies): Primary test subjects: Critical operational equipment (e.g., transformers), new transmission line designs, faulty equipment.

3. Rail Transit (High-Speed Rail/Subway): Primary test subjects: Traction transformers, onboard converters, catenary insulation equipment.

4. Renewable Energy (Wind/Solar): Primary Test Subjects: Wind turbines, solar inverters, transformers in step-up substations.

5. Research & Testing Institutions: Primary Test Subjects: Novel insulating materials, prototype new equipment.

6. Aerospace & Defense: Primary Test Subjects: Power supply components for aircraft electrical systems, radars, and communication equipment.

Key Features & Advantages

1.Complete equipment and wide voltage levels in the whole set of device , voltage capacity series is complete, perfect in shape and function.

2.Successful development of No partial discharge epoxy insulator ,Small electric inductance in the return circuit of the impulse voltage generator.

3.Simple in operation, Convenient in wave adjustment , excellent in synchronization performance and reliable in motion.

4.High automation and strong anti-interference capacity.

Operating Conditions

1.Not more than 1000 meters above sea level;
2.The ambient temperature is -10℃ ~ +45℃, and the relative humidity is no more than 90%.
3. Free of dust and corrosive gases;
4. The generator body should be reliably grounded nearby, and the grounding grid should have low grounding resistance (below 0.5 ohm) and good impact characteristics.

Maintenance & Troubleshooting (FAQ)

Q: What do the parameters 400kV and 20kJ represent?

A: 400kV (kilovolts): Indicates the maximum peak impulse voltage the generator can output.
20kJ (kilojoules): Indicates the energy stored within the generator.

Q: What products can this equipment primarily test?

A:Given its high voltage and large energy capacity, it is mainly used to test electrical equipment at high and extra-high voltage levels,

such as:
Power transformers (220kV, 500kV)
High-voltage switchgear (GIS), instrument transformers
Insulator strings, long-distance power cables
Surge arresters (surge protectors)

Q: Why must our products undergo lightning impulse testing?

A: This is a mandatory type test required by international standards (e.g., IEC, IEEE). Its purpose is to simulate real lightning strikes or grid operational overvoltages, verifying the strength of your product's insulation system to ensure it remains undamaged under extreme conditions. It serves as the ultimate certification of product safety and reliability.

Q: How does it differ from power frequency withstand voltage testing?

A: Both are complementary but assess different aspects:
Power Frequency Withstand Voltage Test: Evaluates the insulation strength ("endurance") of equipment under long-term operating voltage.
Lightning Impulse Test: Assesses the equipment's ability to withstand instantaneous, extremely high overvoltages ("impact resistance"), revealing insulation defects (such as inter-turn insulation issues) that power frequency testing cannot expose.

Q: Is operating this equipment complex? What environment is required?
A: Operation requires specialized training. It is typically installed in a high-voltage test hall equipped with comprehensive shielding, grounding, and safety interlock systems to ensure operator safety and measurement accuracy.

Q: What does the standard configuration include? What additional purchases are required?
A: The standard configuration typically includes the generator unit, charging unit, and basic control console. Additional configurations are usually required: Divider (for precise high-voltage measurement);Digital impulse measurement system (for waveform recording and analysis);
Dedicated test software, etc.

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Technical Specifications

-Rated nominal voltage:400kV

-Rated voltage:100kV
-Rated energy: 20kJ
-Total impulse capactiance:0.25uF
-Single-stage impulse capacitor: 2μF/50kV×2(total 4pcs)
-Load capacitance: 300~3000PF

-Rated nominal value:Current 1Aac,5Aac;

-Voltage 100Vac,150Vac,300Va

-Input overload:Continuous current: 2 times Instantaneous current: 10 times / 5 seconds Instantaneous voltage: 2 times / 30 seconds

-Input load:Current transformer:≤0.2VA;Voltage transformer:≤0.1VA