HZWJF Power Frequency Withstand Test Equipment Hv Pd Partial Discharge Test System

The HZWJF series non-local discharge withstand voltage test device is primarily used for high-voltage circuit breakers, insulators, lightning arresters, switches, mutual inductors, cable accessories, high-voltage coils, and other specimens to carry out power frequency withstand voltage, partial discharge, and other scientific test research.

The complete set of equipment includes an intelligent insulation test comprehensive control system, digital correction pulse generator, input unit, frequency corona-free test transformer, non-local discharge coupling capacitor, non-local discharge protection resistor, electric regulator, and isolation filtering device.

The entire set of equipment is required to be used indoors with a good and dedicated grounding system. The grounding resistance value should be <0.5Ω — the smaller, the better.

• Resists high heat, humidity, and salt spray for tropical island use
• Runs stably at -40℃, cold-proof and anti-condensation
• IEC compliant, with complete calibration certificates provided
• Local support: spares, on-site training, and instrument calibration

Voltage level refers to the test article, not the transformer.

The main interface of the touch screen can complete the same control functions as the upper computer. The panel can digitally display the current test voltage, test current, and other necessary information, and manually set up the boosting curve (set up the rated voltage, the local discharge test current, and other necessary parameters), and complete the local discharge, voltage withstand, and other tests with a single key.

The panel is equipped with an emergency stop button switch, which can be pressed in case of emergency and the system will automatically break the main circuit switch. The panel is equipped with a power button, which can be pressed to start the system with electricity.

The controller has an external control function, providing a start button, stop button, and test result status indicator that can be connected to the generator section. The controller has reserved interfaces for external red and green indicators, which can be used to install red and green indicators in the main loop body part.

1. Rated Output Capacity: 50kVA (Non-local Discharge Test)
2. Rated Output Voltage: 120kV (Non-local Discharge Test)
3. Rated Output Current: 0.416A (Non-local Discharge Test)
4. Rated Input Voltage: 0.38kV
5. Short-circuit Impedance: <6%
6. Local discharge level of the complete set: <5pC at 100% rated voltage, ≤2pC at 80% rated voltage
7. Running time: under 100% UH and 100% IH, it is allowed to run for 30 minutes from the ambient temperature; under 70% UH and IH, it is allowed to run continuously from the ambient temperature. The temperature rise of the transformer winding is ≤65K, and the temperature rise of the transformer oil is ≤55K.
8. Waveform distortion rate of the set: regulator input voltage waveform distortion rate <3%; complete sets of equipment output voltage waveform distortion rate ≤3%

1. Structure Type: insulated shell oil-immersed natural cooling, single unit composition
2. Phases Number: single-phase
3. Frequency: 50Hz
4. Rated Input Voltage: 0.38kV
5. Rated Input Current: 131.5A
6. Rated Output Voltage: 150kV
7. Rated Output Current: 0.416A
8. Rated Output Capacity: 50kVA
9. Measured winding voltage ratio: 1000:1
10. Waveform distortion rate: ≤3%
11. Dielectric loss factor: tanδ <0.3% (90ºC)
12. Partial discharge: ≤5pC under 100% rated voltage, ≤2pC under 80% rated voltage
13. Insulation level: 110% rated self-induced withstand voltage for 1 minute
14. Overcurrent Capacity: effective measures should be taken (additional protective resistors, etc.), so that the test transformer in the test product insulation breakdown phenomenon should not cause damage to the test transformer; in 110% rated current duration of 1min working conditions, overcurrent on the test transformer should not cause thermal damage and deformation of the windings.
15. Over-Voltage capability: in 110% UH (220KV) time 1min under over-voltage, should not cause any insulation damage to the test transformer, when the waveform distortion rate ≤5%.
16. Running time: in 100% UH, IH from the ambient temperature is allowed to run 60 minutes; in 70% UH, IH from the ambient temperature is allowed to run continuously. Transformer winding temperature rise ≤65K, oil surface temperature rise ≤55K.
17. Noise level: ≤65db
18. Insulating oil performance: oil withstand voltage ≥60kV; water content ≤10ppm
19. Dielectric loss (90ºC) ≤0.4%

1. Phase Number: Single-phase
2. Frequency: 50Hz
3. Rated Capacity: 50kVA
4. Rated Input Voltage: 0.38kV
5. Rated Input Current: 131.5A
6. Rated Output Voltage: 0~0.42kV
7. Rated Output Current: 119A
8. Waveform distortion rate: ≤3%
9. Starting voltage: ≤2%
10. Short-circuit impedance: ≤8% (within 50%~100% voltage regulation)
11. Structure form: column, dry type
12. Short-circuit capacity: transient capacity state of the test transformer output through the protective resistor on the test piece discharge, short-circuit current up to 2 times the output, discharge duration of 8 weeks should not be within the regulator winding caused by any thermal damage and mechanical deformation.
13. Voltage regulating method: electric voltage regulating, using DC motor drive
14. Regulator with upper and lower limit devices
15. Running time: Same as transformer