Contactor device for circuit breaker

Details Contactor device for circuit breaker Contactor device for circuit breaker

1988-10-27

1989-11-14

Broome, H.

Electricity: circuit makers and breakers

Liquid contact

Time delay

335195, 337 68, 337 91, H01H 932, H01H 7116, H01H 3306

Patent

active

048809489

ABSTRACT:
A contactor device for a circuit breaker includes a stationary contactor having a stationary contact, and a stationary conductor secured with the stationary contact and constituting an electricity path extending from an external terminal to the stationary contact, and a movable contactor having a movable contact movable to detachably touch the stationary contact, and a movable conductor secured with the movable contact and constituting an electricity path extending from the movable contact to another external terminal. The contactor device further includes a stationary core made of a ferromagnetic material with a gap between both ends of the stationary core and surrounding the stationary conductor, a movable core provided at a distance from said stationary core to be attracted toward the stationary core by a magnetic flux generated in the stationary core by an excessive overcurrent flowing through the circuit breaker, and an electrically insulating plate movable in a direction perpendicular to that of separation of the movable contact from the stationary contact, so that the insulating plate is moved together with the movable core and inserted into a space between the stationary contact and the movable contact at the time of the attraction of the movable core toward the stationary core, when the breaker cuts off the overcurrent.

REFERENCES:
patent: 4458225 (1984-07-01), Forsell
patent: 4467298 (1984-08-01), Belbel et al.
patent: 4677266 (1987-06-01), Belbel et al.

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