How To Safely Repair Distribution Transformers?

1) Before carrying out maintenance, the previous power switch must be opened and powered off, and a power outage sign must be hung. Then use a test pen to check and confirm that the device to be repaired has been powered off before repair can be carried out.
2) During maintenance, two people must be present, one for maintenance and one for supervision.
3) Maintenance personnel must be professional electricians who are familiar with power distribution devices.
4) Maintenance personnel must wear protective equipment and use electrical insulation tools.
5) Replacement of electrical appliances must be consistent with the original specifications, and the use of unqualified substitutes is prohibited.
6) During maintenance, the wiring of the original power distribution device must not be changed at will, and the original switching appliances must not be removed at will.
7) When the maintenance is completed, the power distribution device should be disconnected, and then the power supply side should be closed and energized step by step. After confirming that the power supply is connected with an electroscope, the next step should be energized for testing.
8) When the maintenance is completed, remove the upper-level power switch and hang the power outage sign.