Pneumatic operating mechanism for a circuit breaker

Details Pneumatic operating mechanism for a circuit breaker Pneumatic operating mechanism for a circuit breaker

1984-05-11

1985-07-23

Scott, J. R.

Electricity: circuit makers and breakers

Fluid pressure

Piston

200148F, H01H 3342, H01H 3538

Patent

active

045310319

ABSTRACT:
Power circuit breaker apparatus having a novel trip valve on the pneumatic operating mechanism for reducing air consumption of the pneumatic breaker operating mechanism. The novel trip valve includes the addition of a valve stem extension to the trip valve shaft disposed in a sliding fit with an exhaust port to the trip valve actuating cylinder which together provide for quick elimination of compressed air from the trip valve actuating cylinder at a predetermined time during the operation of the breaker mechanism. Positive positioning of the breaker contact and rapid closing of the trip valve at a predetermined time is effectuated thereby reducing air consumption while providing a fail-safe air cushion to the driving piston of the pneumatic mechanism to insure positive positioning of the breaker contacts.

REFERENCES:
patent: 4095068 (1978-06-01), Meyer et al.
patent: 4101748 (1978-07-01), Meyer et al.
patent: 4213020 (1980-07-01), Freeman
patent: 4306263 (1981-12-01), Gray et al.
patent: 4384182 (1983-05-01), Iman

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