Power Frequency Withstand Voltage Test Device
DARUI Electric recommends
I. Precautions
1. When conducting high-voltage electrical tests, at least 2 or more personnel must participate, with clear division of labor and mutual understanding of methods. A dedicated person should supervise on-site safety and observe the test status of the sample;
2. The high-voltage test transformer and the test transformer control box should have reliable grounding;
3. During the test, the voltage increase speed should not be too fast, and sudden full-voltage power-on or power-off is absolutely not allowed;
4. During the voltage increase or withstand voltage test, if any of the following abnormal conditions are found, immediately reduce the voltage, cut off the power, stop the test, and investigate the cause before proceeding. ① The voltmeter pointer swings significantly; ② Burning smell or smoke from insulation is detected; ③ Abnormal sounds from the tested sample.
5. During the test, if the sample short-circuits or breaks down, the overcurrent relay in the control box will activate. At this time, return the voltage regulator to zero, cut off the power, and only then can the sample be removed.
6. When conducting capacitance tests or DC high-voltage leakage tests, after the test is completed, lower the voltage regulator to zero, cut off the power, and then use a discharge rod to discharge the high-voltage terminal of the sample or capacitor to ground to avoid electric shock from the potential stored in the capacitor. |
II. Power Frequency Withstand Voltage Test Device adopts the method of adjusting the power frequency so that the reactor and the tested capacitor achieve resonance, obtaining high voltage and large current on the tested sample. It is a new method and trend in high-voltage testing and has been widely applied domestically and internationally.
III.
Power Frequency Withstand Voltage Test DeviceProduct Features:
1. Simple operation, small size, light weight, very convenient for on-site use and transportation (volume and weight are about 1/10 to 1/30 of traditional test transformers);
2. Low requirements for on-site power supply;
3. Good test equivalence;
4. Unique low harmonic technology, with actual harmonic content measured by Wuhan High Voltage Research Institute below 0.3%, far lower than the national standard requirement of no more than 5%, greatly protecting the main transformer,
5. Complies with national standards with peak monitoring function, allowing real-time monitoring of high-voltage test waveforms;
6. One-key mouse knob operation, large LCD screen, "foolproof" simple and easy to use;
7. Built-in micro printer, print and save test data at any time;
8. Overvoltage, overcurrent, discharge, overheating, and zero-start protection are comprehensive and reliable, with an action time of 1 microsecond.
Optional accessories (selected based on configuration):
1. AC/DC voltage divider: 50, 100, 150, 200kV
Protective sphere gap: Q—50, 100, 150, 200, 250, 500
DC microammeter: 1999uA
Discharge rod: 70, 140, 210kV
Protective water resistor
High-voltage filter capacitor: 0.01μF~0.1μF, 40~300kV
Special test wire kit for power
Folding trolley: 150, 300 type
Insulation support: 50, 100, 200, 300kV
Standard oil test cup: 400ml
High-voltage electroscope: 10, 35kV
Note: The above information and technical parameters are compiled and published by Yangzhou DARUI Electric Co., Ltd.
