High-voltage disconnect switch in the operation, should check the corresponding circuit breaker is indeed in the open position, to prevent the load pull, close the disconnector. When the line is stopped and power is sent, the isolating switch must be pulled and closed in sequence. When power failure operation, must first pull the circuit breaker, pull after the line side isolation switch, and then pull the bus side isolation switch. The Order of power supply operation is opposite to the Order of power outage. This is because misoperation occurs, according to the above order can reduce the scope of the accident, to avoid the accident to expand to the bus. During operation, if serious defects such as serious damage of insulator and transmission rod of disconnector are found, the operation shall not be carried out.
