Principle of stopping power transmission: stop the load side first, and then stop the power side; Power is first delivered to the power supply side and then to the load side. The purpose of this is to keep the fault point away from the bus or the main power supply and ensure the reliability of power supply when there is no operation or power is sent to the accident point.
Power outage sequence: stop reclosing first, then disconnect the circuit breaker, open the load side breaker, and then open the power side breaker. The power transmission sequence is reversed. For the transformer, the protected side should be selected for charging. First, close the power supply side isolation breaker, then close the load side isolation breaker, and then close the main transformer.
Power outage management system:
1, part-time or off-duty electrical personnel are not allowed to operate electrical equipment without authorization.
2. When working on power-off equipment or lines, the operation of stopping power transmission must be operated by an electrician with relevant certificates after passing the training.
3, electrical equipment inspection, maintenance and adjustment, must be carried out by the electrical mechanic. Electrical maintenance personnel must be trained and qualified before taking up their posts with certificates, and the maintenance of high-voltage electrical equipment must have working tickets and construction measures.
4, all kinds of switches, control box under normal circumstances to stop running equipment must be power atresia. For the simple operation of starting and stopping electrical equipment, full-time duty personnel can stop the power transmission operation, but full-time duty personnel must be trained, familiar with the power supply facilities within their own scope, and take up their posts after passing the examination.