Current limiting circuit breaker with an arc shearing plate

Details Current limiting circuit breaker with an arc shearing plate Current limiting circuit breaker with an arc shearing plate

1986-12-30

1988-06-21

Goldberg, E. A.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200144R, H01H 932, H01H 3306

Patent

active

047526602

ABSTRACT:
A circuit breaker includes an arc shearing plate which is driven to thrust between a pair of contacts being separated so as to shear an arc formed therebetween for rapid arc extinction. Included in the circuit breaker is an over-current responsive actuating member which applies an impact to one of the contacts for rapid contact separation in response to a predetermined over-current condition such as caused by a short-circuit. The actuating member is also coupled to the arc shearing plate so as to control the thrusting movement of the arc shearing plate in synchronism with the rapid contact separation, whereby the timing of inserting the plate between the contacts can be easily controlled with respect to that of separating the contacts for achieving rapid arc extinction and providing a high arc voltage and current limiting action.

REFERENCES:
patent: 3842228 (1974-10-01), Green
patent: 4458225 (1984-07-01), Forsell
patent: 4467298 (1984-08-01), Belbel et al.
patent: 4562323 (1985-12-01), Belbel et al.
patent: 4604596 (1986-08-01), Yokoyama et al.
patent: 4647741 (1987-03-01), Belbel et al.

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