1. Wear insulating gloves and shoes! After the power failure, use a high-voltage measuring stick to detect whether there is really no power. After confirming that there is no electricity, use a special short wire (rod) to discharge ABC phase! And connect short circuit to prevent tripping due to sudden call. Then put up a sign that someone is working and no braking is allowed.
2. Then check whether the screws are loose. Wipe the dust and oil stains on the bus, porcelain insulator and transformer with a dry rag. Add transformer oil and change desiccant! The oil spill should be properly handled. After that, notify all departments and prepare for power supply! Don't forget to remove the short route (pole). Observe whether there is any abnormality after electrifying, and go to the workshop to check whether the equipment is normal.