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Precautions for testing transformer

time:2021/3/14   source:华天电力  reading:592 time

1. When doing high-voltage test, two or more people must participate, and the division of labor must be clearly defined, and the methods for each other must be clearly defined. And there is a dedicated person to monitor the on-site safety and observe the test status of the test product; inflatable test transformer rental

2. The transformer and control box should have reliable grounding;

3. During the test, the boost speed cannot be too fast, and it is never allowed to suddenly power on or cut off the full voltage;

Hipot Test Set.png

4. During the boost or withstand voltage test, if the following abnormal conditions are found, the voltage should be reduced immediately, the power supply should be cut off, the test should be stopped, and the cause should be found before doing the test. ① The pointer of the voltmeter oscillates greatly; ② The peculiar smell and smoke of the insulation burnt are found; ③ There is abnormal sound in the tested product.

5. During the test of the gas-filled test transformer, if the test product is short-circuited or the fault is broken down, the overcurrent relay in the control box works. At this time, the voltage regulator is returned to the zero position and the power supply is cut off before the test product can be taken out. .

6. When conducting a capacitance test or a DC high voltage leakage test, after the test is completed, lower the voltage regulator to zero and cut off the power supply. Then, use a discharge rod to discharge the high voltage end of the test product or capacitor to the ground to avoid There is a danger of electric shock from the potential stored in the capacitor.

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