Tripping device for a circuit breaker

摘要

The invention provides a tripping device for a circuit breaker having contacts arranged in a housing, said contacts being separable by actuation of a tripping shaft of a shutoff device. An exhaust duct assigned to said contacts is constructed in said housing. A lever rotatably arranged on said housing is interactively connected to said tripping shaft, and has a barrier surface associated with said exhaust duct which as the result of a pressure surge in said exhaust duct deflects said lever to actuate said tripping shaft.