Why the circuit breaker or knife lockout circuit can not use heavy relay
What do you say do not understand, what is the relocation relay? Are you talking about closing or locking? Reclosing switch on the self, with the knife on the no thing; if that lock, knife gate is generally dependent on the mechanical latch, the circuit breaker is generally set by the protection of the logic of the lock, you said that thing is Gansha Has not seen.
Because the locking device depends on the passive contact with the device itself to achieve the latch-up is reliable and rely on the extension of the relay relay called re-relay to achieve unreliable and twenty-five countermeasures to prohibit the use of heavy relays to achieve latch-up
The circuit breaker and the disconnector of the isolation circuit to receive the switch and the switch of the auxiliary node, then re-relay, if the maintenance of the operation when the power is off, the relay may return, the electric shock can not reflect the switch and the switch The real state may lead to misuse.
