Wuhan Goldhome Hipot Electrical Co., Ltd. is one of the leading manufacturers and suppliers of lightning impulse testing for power transformers and high-voltage electrical equipment in China. With abundant experience, our factory offer high quality customized products made in China with competitive price. Welcome to contact us for quotation.
Product Video
Product Overview
|
The HMCJ-1200kV/90kJ is a complete impulse voltage test system rated at 1200 kV with 90 kJ stored energy, delivered in 8 stages of 150 kV each. It generates the standard 1.2/50 µs lightning impulse full wave and a 2–6 µs chopped wave, with an efficiency of no less than 90% and an amplitude deviation within ±3%. Each stage carries 16 oil-immersed pulse capacitors (2.0 µF, 75 kV), giving a total impulse capacitance of 0.125 µF. The bilateral symmetrical charging circuit and SCR constant-current regulator hold charging voltage instability below ±1.0%, so the wave you set is the wave you get, shot after shot. |
complete system
The quotation covers the generator body, the CD-±150 DC charging device, the RZF1200-0.0004 weakly damped capacitor voltage divider, the DB-1200 multi-ball chopping device, and the YMT-7721 control and measurement system with a Tektronix TBS2012 oscilloscope.
Measurement cables, control cables, wave-shaping resistors, grounding rods and a fault-detection resistor set are supplied as standard accessories. The weakly damped capacitive divider has a 400 pF high-voltage arm, a partial response time Tα of no more than 100 ns, overshoot β below 5%, and a division ratio accuracy within ±1%, so the recorded waveform is a faithful copy of the impulse you applied.
| Subsystem | Model | Key figures |
|---|---|---|
| Impulse generator body | HMCJ-1200kV/90kJ | 1200 kV, 90 kJ, 8 stages |
| DC charging device | CD-±150 | ±200 kV / 10–200 mA; deviation ≤±1% |
| Weakly damped capacitor divider | RZF1200-0.0004 | 400 pF HV arm; Tα ≤100 ns; ratio 4000 |
| Multi-ball chopping device | DB-1200 | 1200 kV; 6 ball gaps; 2–6 µs; Ф200 mm |
| Control & measurement console | YMT-7721 | SIEMENS PLC; TBS2012 scope, 0.5% accuracy |
Marx generator Specification
| Parameter | Specification |
|---|---|
| Product model | HMCJ-1200kV/90kJ |
| Rated impulse voltage | ±1200kV |
| Nominal energy | 90kJ |
| Number of stages | 8 |
| Rated stage voltage | ±150kV |
| Stage capacitance | 2.0μF |
| Total impulse capacitance | 0.125μF |
| Chopping time | 2–6μs |
| Main test waveforms | Lightning impulse full wave and chopped wave |
| Voltage measurement | Capacitive voltage divider |
| Chopping device | DB-1200 multi-sphere chopping device |
| Control and measurement | PLC control and waveform measurement system |
Standards and Acceptance
The system is designed, manufactured and tested against GB 7449, GB 1094.3, GB/T 311.1, GB/T 16927.1, GB/T 16927.2, GB/T 16896.1, ZBF 24001 and DL/T 848.5, covering impulse voltage test technique, measurement systems, digital recorders and impulse voltage generators respectively.
Factory acceptance testing is completed with the buyer before shipment, covering waveform measurement, input and output voltage and current, terminal heating checks, over-voltage and over-current setting tests, emergency stop tests, and a full-load flashover test repeated three times.
Component-level checks include DC resistance and insulation resistance of charging, front and tail resistors, capacitance and dielectric loss of the impulse capacitors, divider ratio verification, and synchronous operation of the ball gaps in both manual and automatic modes.
Typical Applications
The 1200 kV / 90 kJ system is used for lightning impulse full-wave and chopped-wave testing of power products rated 3.3–110 kV and below: high-voltage switchgear, circuit breakers, insulators, load-break switches, reactors, power transformers and cable accessories.
The generator body can be operated with two or more stages in parallel, lowering the minimum test voltage to 20 kV with a single stage for small-capacity specimens.
fAQs
Q: How is the impulse voltage measured and recorded?
A:Measurement uses the RZF1200-0.0004 weakly damped capacitive voltage divider together with a Tektronix TBS2012 digital oscilloscope (100 MHz bandwidth, 2 channels, ≥1.25 GS/s). The YMT-7721 system transfers waveforms to an industrial computer, analyses wave parameters automatically, and exports a standard test report.
Q: Can the system be upgraded later?
A: The support structure and DC charging unit are designed for expansion to the 1200 kV class, so a future upgrade does not require replacing the whole system.
Q: What is your production lead time?
A: Standard model: 60–90 days
Customized system: 90–150 days
depending on project requirements.
Hot Tags: lightning impulse testing for power transformers and high-voltage electrical equipment, China lightning impulse testing for power transformers and high-voltage electrical equipment manufacturers, factory
