Circuit breaker and opening and closing method thereof

Details Circuit breaker and opening and closing method thereof Circuit breaker and opening and closing method thereof

2011-03-22

2011-03-22

Donovan, Lincoln (Department: 2832)

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Tripping means

C335S013000, C335S038000, C335S151000, C335S153000, C335S154000, C335S179000, C335S192000, C335S195000, C335S220000, C335S229000, C335S241000, C335S299000, C218S120000, C218S140000, C218S141000, C218S154000

Reexamination Certificate

active

07911303

ABSTRACT:
A circuit breaker includes a vacuum valve, an electromagnet including a first coil for driving an operating shaft of the vacuum valve toward an opening direction by electromagnetic repulsion, a movable core and a permanent magnet. Further, an operating mechanism is provided which excites the first coil to close the vacuum valve, holds the vacuum valve closed by an attractive force of the permanent magnet and excites the first coil in a direction reverse to an excitation direction in closing operation to open the vacuum valve. In the circuit breaker, together with the first coil, a second coil is disposed which is excited simultaneously with an electromagnetic repulsion coil for a quick opening operation by electromagnetic repulsion is provided in the electromagnet.

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