Integrated Impulse Voltage Test System
High-voltage equipment used in power transmission and distribution systems must withstand severe transient overvoltages caused by lightning strikes and switching operations. An Impulse Voltage Test System simulates these extreme electrical conditions in a controlled laboratory environment to verify insulation strength, identify potential weaknesses, and ensure long-term operational reliability.
Technical Performance Overview
|
Parameter |
Standard Range / Specification |
|
Output Voltage Range |
100 kV – 3,200 kV (Expandable) |
|
Stage Energy |
5 kJ – 20 kJ per stage |
|
Total Stored Energy |
10 kJ – 320 kJ+ |
|
Waveform Standard Compliance |
IEC 60060-1, IEC 60076-3, IEEE Std 4 |
|
Measurement Resolution |
10-bit / 12-bit high-speed digital recorder |
Key Benefits for High-Voltage Testing
Precise Waveform Generation & Stability
The system uses optimized front and tail resistor networks to generate stable, standardized impulse waveforms. Precise parameter control minimizes manual tuning, allowing laboratories to achieve highly repeatable test results during both routine factory acceptance testing (FAT) and type testing.
Flexible Modular Architecture
Different electrical products demand different voltage ratings and energy capacities. The generator's modular design allows laboratories to configure system stages based on:
- Voltage class of the test object
- Required Basic Impulse Level (BIL / SIL)
- Energy absorption requirements
- Available laboratory space and ceiling height
- Future power expansion plans
Automated Operation & Efficiency
An integrated PLC-based control platform automates the entire testing sequence-from charging and triggering to peak parameter calculation and automated test report generation. This eliminates human error, speeds up test cycles, and ensures consistent operating procedures.
High-Precision Digital Measurement
Equipped with high-bandwidth damped capacitive or resistive voltage dividers and a multi-channel digital impulse recorder, the system accurately captures microsecond transients. Engineers can analyze peak values, front/tail times, chop times, and waveform overshoot with full data traceability.
Multi-Layer Safety Protection
High-voltage impulse testing involves massive energy discharge. Integrated safety features include:
- Hardware safety interlocks and emergency stop loops
- Automatic motorized grounding switches for rapid discharge
- Automated over-voltage and over-current protection
- Visual status indicators and physical safety barriers
Main System Components
Modular Impulse Generator: High-voltage capacitor stages connected via low-inductance charging/discharging loops.
DC Charging Unit: Delivers stable, regulated DC voltage with smooth polarity reversal.
Wave-Shaping Resistor Set: Easily interchangeable front and tail resistors tailored to specific test loads.
Impulse Voltage Divider: Highly linear measurement divider ensuring accurate signal attenuation.
Chopping Gap Assembly (Optional): Multiple-sphere gap for precise chopped lightning impulse testing.
Digital Impulse Measurement & Control Unit: Industrial-grade console running dedicated analysis and management software.
Typical Applications
Power Equipment: Power transformers, distribution transformers, instrument transformers (CT/PT), shunt reactors, power capacitors.
Switchgear & Transmission: Gas Insulated Switchgear (GIS/PASS), HV circuit breakers, disconnectors, switchgear panels.
Cables & Accessories: High-voltage XLPE cables, terminations, cable joints, bushings, surge arresters, polymeric insulators.
R&D & Certification: National high-voltage laboratories, university research centers, third-party certification bodies.
Quality Assurance & International Compliance
Supported International Standards:
IEC 60060-1 / IEC 60060-2
High-Voltage Test Techniques
IEC 60076-3
Power Transformers – Insulation Levels, Dielectric Tests and External Clearances in Air
IEEE Std 4
IEEE Standard Techniques for High-Voltage Testing
FAQ
Q: What is an Impulse Voltage Test System used for?
A: An Impulse Voltage Test System is used to simulate lightning and switching surges to verify whether high voltage electrical equipment insulation can withstand transient overvoltages.
Q: Which products can be tested with this system?
A: It can be used for transformers, GIS, switchgear, high voltage cables, bushings, surge arresters, insulators, motors, generators, and other electrical equipment requiring impulse testing.
Q: What impulse waveforms can the system generate?
A: The system can generate lightning impulse, switching impulse, front-chopped impulse, and tail-chopped impulse waveforms depending on the configuration.
Q: Can the impulse voltage level be customized?
A: Yes. The impulse voltage rating, generator stages, stored energy capacity, and measuring system can be configured according to specific testing requirements.
Q: Does the system support automatic operation?
A: Yes. The control software can manage charging, triggering, waveform recording, analysis, and report generation to improve testing efficiency.
Q: How does the system ensure measurement accuracy?
A: The system uses precision voltage measurement components, digital recording technology, and waveform analysis software to provide reliable test data.
Q: Can the system be integrated into an existing high voltage laboratory?
A: Yes. The system can be configured with compatible measuring equipment and control solutions to meet existing laboratory requirements.
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