Points for attention when doing high voltage AC and DC tests

1. The test transformer and control box should have reliable grounding;
2. When doing high-voltage AC and DC tests, 2 or more people must participate, and the division of labor should be clearly defined and the methods of each other should be clearly defined. And there is a special person to monitor the safety of the site and observe the test status of the test product;
3. During the test, the boosting speed should not be too fast, and the sudden full voltage power-on or power-off is never allowed;
4. In the process of boosting or withstand voltage test, if the following abnormal conditions are found, HV HIPOT reminds that the pressure should be reduced immediately, and the power supply should be cut off, the test should be stopped, and the test should be carried out after finding out the reason. ①The pointer of the voltmeter swings greatly; ②It is found that the odor and smoke of the insulation are burnt; ③There is an abnormal sound in the tested product.??
5. During the test, if the test product is short-circuited or faulty, the over current relay in the control box will work. At this time, return the voltage regulator to zero and cut off the power supply before taking out the test product. 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. There is a risk of electric shock due to the electrical potential remaining in the capacitor.