Blocking Magnet purpose in HV SF6 circuit breaker
Blocking Magnet purpose in HV SF6 circuit breaker
(OP)
Can anyone explain the purpose of a blocking magnet within a 11kV ABB SF6 circuit breaker, what is it's function. Circuit breaker is motor charged with 1x shunt trip, 1x closing coil and a blocking magnet.
Thanks for your help
Thanks for your help






RE: Blocking Magnet purpose in HV SF6 circuit breaker
Block magnet or lock magnet, additional coil, is used for block mechanical/handle close of Circuit Breaker.
RE: Blocking Magnet purpose in HV SF6 circuit breaker
RE: Blocking Magnet purpose in HV SF6 circuit breaker
Such type of interlock is mechanical only.
If you need some additional interlocks ( station interlocks for example), you have add block magnet for truck or for earthing switch.