1)Electrical testing personnel should fully understand the performance of the tested equipment and instruments used. Before the experiment, the equipment and wiring should be checked. The secondary circuit of the current transformer should be strictly guarded against open circuits, and the secondary circuit of the voltage transformer should be strictly guarded against short circuits.

2)The casing of high-voltage testing equipment must be reliably grounded, and testing must not be conducted before grounding.

3)When conducting high-voltage tests on site, temporary barriers should be set up in the work area, warning signs should be hung, and a dedicated person should be on guard to prohibit anyone from approaching the test object.

4)The operator of high-voltage testing equipment should wear insulated gloves, insulated boots, or stand on an insulated platform. During high-voltage testing, a guardian should supervise the operation. Without a guardian, no operation is allowed.

5)The high-voltage electrode of the high-voltage testing equipment should be grounded or short circuited with a grounding rod before the test. After testing electrical equipment with a high-voltage power supply, the tested equipment should be grounded and discharged.

6)After the high-voltage capacitor is tested, it should be immediately discharged, grounded, and tested to confirm that there is no residual voltage before touching the capacitor.

7)When testing cables, the end of the tested cable must be guarded by someone. When changing the wiring during the experiment, the power must be cut off first, and then the cable must be fully grounded and discharged. After checking for no residual voltage, the wiring can be replaced

8)When checking whether the high-voltage testing equipment or the tested equipment has electricity, a high-voltage tester that meets the usage requirements and has passed inspection should be used. It is strictly prohibited to use a low-voltage tester to inspect high voltage.

9)When using a megohmmeter to remotely measure insulation resistance, the measured object should be disconnected from the power source; During the experiment, contact with humans should be avoided. After the experiment, the tested object should be grounded and discharged. The voltage level of the selected megohmmeter must match the voltage level of the tested equipment. It is strictly prohibited to use a megohmmeter with a higher voltage level to measure equipment with a lower voltage level.

10)During the secondary circuit withstand voltage test, dedicated personnel should be assigned to monitor the relevant circuits and equipment.

11)If any abnormal situation occurs during the experiment, the power should be immediately disconnected, grounded and discharged before inspection.

12)After the completion of the experimental work, the tested equipment should be restored to its normal state. When relays and instruments need to be sealed, lead seals should be added according to regulations.