Wuhan Goldhome Hipot Electrical Co., Ltd. is one of the leading manufacturers and suppliers of gis partial discharge test system in China. With abundant experience, our factory offer high quality customized products made in China with competitive price. Welcome to contact us for quotation.
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Products Description
The HMGTU-1200KVA/600KV GIS test system primarily consists of a control system, a high-voltage power supply system, a test specimen interface system, and a low-voltage power supply system. When testing is conducted in an unshielded environment, the harmonic content of the test power supply is <5%. At rated voltage, the partial discharge level of the entire system is less than 2 pC, and at 80% of rated voltage, it is less than 1 pC. The unit connects to the test specimen via a dedicated interface in a single step, enabling the completion of withstand voltage and partial discharge tests on the specimen. The annual leakage rate of each sealed gas chamber is less than 0.5%.
Products parameters
1. GTU High-Voltage Test Transformer
The transformer consists of an excitation coil, a high-voltage coil, and a measurement winding (this winding is used only for equipment commissioning).
- Model: GTU-1200kVA/600kV
- Number of Phases: Single-phase
- Frequency: 50Hz
- Number of Stages: Single-stage
- Rated Input Excitation Voltage: 1000V
- Input Current: 1200 A
- Rated Output Voltage: 0–600 kV
- High-Voltage Output Current: 2 A
- Impedance Voltage: ≤15% (50 Hz)
- Partial Discharge Level: Less than 2 pC at 100% rated voltage;
- Less than 1 pC at 80% rated voltage;
- Waveform Distortion Rate: ≤3%
- Operating Time: 30 minutes at rated current; continuous operation at 2/3 rated current with coil temperature rise ≤55K
- Insulation medium: SF6
- Construction: The high-voltage, partial discharge-free test transformer is housed in a separate metal enclosure equipped with a gas filling port, pressure gauge, pressure relief valve, and terminal blocks. The high voltage is connected to the system's high-voltage GIS via bowl-type insulators and a current-limiting protective reactor.
- Insulation level: Withstands 1.1 times the rated voltage for one minute without any abnormalities.
Products FAQs
Q: What is the scope of application for this 600 kV test system?
A: It is suitable for factory testing of GIS systems rated at 252 kV and below.
Q: What are the partial discharge (PD) requirements for the entire system?
A: The partial discharge level of the entire system at rated voltage must be less than 2 pC; at 80% of rated voltage, it must be less than 1 pC.
Q: What are the sealing standards for the equipment gas compartments?
A: The annual leakage rate of each sealed gas compartment must be less than 0.5%.
Q: What items are included in the factory acceptance inspection of the equipment?
A: 1. Visual inspection; 2. SF6 seal leak test; 3. Turns ratio test; 4. DC resistance measurement of each winding; 5. External withstand voltage test; 6. Induced withstand voltage test; 7. Short-circuit impedance measurement; 8. System partial discharge measurement (≤2 pC for 10 minutes at 600 kV); 9. Waveform distortion measurement (<5%); 10. Measurement accuracy calibration (±1%).
Q: What is the production lead time for the equipment?
A: 45 working days after the technical agreement and commercial contract take effect.
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