Profile:
1. Local discharge test transformer 5kVA/50kV one
2. Local discharge test control power supply 5kVA/50kV one
3. Local discharge isolation filter 5kVA/450V one
4. Local discharge coupling capacitor (with voltage division function)50kV/1000pF
5. Local discharge protection resistance 50kV/10KΩ one
6. A digital partial discharge detector
Features:
◆ After the partial discharge signal is digitally processed, the LCD display is used instead of the traditional oscilloscope tube display.
◆ The operation is the same as the traditional analog partial discharge testing instrument, simple and easy to learn.
◆ Free choice of ellipse, straight line, sine display mode
◆ Digital window opening technology can avoid the influence of interference on measurement.
◆ Any phase window opening, single window, double window option, oval 150 degrees rotation.
◆ The current discharge graph can be fixed frame storage processing, static observation and analysis of partial discharge pulse.
◆ The current discharge graph can be saved to achieve the traceability of test results.
1. The capacitance range of the test product is 6pF ~ 250µF
2. Detection sensitivity and allowable current
Parameter:
Specification Model: 5kVA/50kV
Rated capacity: 5kVA
Input voltage: 0 ~ 400V
Rated voltage: primary: 0.38kV secondary: 50kV
Rated current: primary: 75A secondary: 0.3A
Voltage accuracy: < AC 1.0%
Frequency: 50Hz
Measuring winding partial voltage ratio: 100:1
No-load current: 5%
Waveform distortion rate: ≤ 5%
Local discharge: 100% UN not more than 5PC
System noise level: ≤65dB
Local discharge at rated voltage: ≤3pC
Join group: II0
Cooling method: ONAN
Conditions of use: indoor
Output current: 100mA Insulation medium: SF6
Power distortion: < 3% of the rated voltage system offload ≤5PC
Dimensions: about 480*480*750mm
Weight: About 55kg
Structure: Epoxy drum shell SF6 gas
Overcurrent capacity: Under the condition of 150% (0.75) rated current duration of 300S, the overcurrent test transformer windings will not cause thermal damage and winding deformation.
Overvoltage capacity: the overvoltage at 110℅UH (55kV) time 60S should not cause insulation damage to the test transformer, and the waveform distortion rate is less than 5%.
Insulation level: low voltage end power frequency resistance 15kV/min
Dielectric loss: ≤0.5%
Local discharge: less than 5PC under 100%UH; 80%UH less than 3PC.
Running time: 60min from the ambient temperature at 100%HU and IH, and continuous running from the ambient temperature at 80%UH and IH.
Temperature rise test: under normal operating conditions, the winding temperature rise is less than 65K, and the oil surface temperature is less than 55K
