Is there a sequence of circuit breakers and disconnectors?
The disconnector does not have an arc extinguishing mechanism that can cause equipment damage and personal injury and death, and cause a large area power outage.
If you do not follow the above procedures, power transmission, the first circuit breaker, after the isolation switch, or power failure, the first pull off the switch, after pulling the circuit breaker, the isolation switch or pull off the switch will produce an instant arc
and there is no problem. After the circuit breaker, the circuit breaker has the ability of interrupting,
At the time of power transmission, because the circuit breaker and the disconnector are in the disconnected state, there is no current in the circuit when the switch is disconnected first,
