Molded case circuit breaker with pressure release mechanism

Details Molded case circuit breaker with pressure release mechanism Molded case circuit breaker with pressure release mechanism

H - Electricity

01

H

H01H 9/00 (2006.01) H01H 9/02 (2006.01) H01H 9/34 (2006.01) H01H 71/00 (2006.01) H01H 71/02 (2006.01)

Patent

CA 2273826

A circuit interrupter including an operating mechanism and separable main contacts interconnected with load and line terminals has an interface region between the top and bottom portions of the completed housing thereof, which may be of reduced cross section relative to the remainder of the side walls of the circuit interrupter for being moved or pushed outwardly under the pressure of expanding gas during a circuit interruption operation. To more easily clear or separate abutment surfaces by near lateral movement thereof to provide a small opening for pressurized gas to escape the elasticity of the side wall is utilized for this purpose. Provided that the elasticity limit is not exceeded, the wall will return to its original position sealing the internal portions of the circuit interrupter from the exterior once the gas pressure has dropped below a predetermined level.

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