FRAME-TYPE CIRCUIT BREAKER WITH MECHANICAL SHORT CIRCUIT SELF-LOCKING FUNCTION

摘要

A frame-type circuit breaker with mechanical short circuit self-locking function comprises: a frame-type circuit breaker body (1), a short circuit detecting component (23), a short circuit action triggering mechanism, and a mechanical self-locking mechanism. The short circuit detecting component is in a pivoted state in the frame-type circuit breaker body and can mechanically rotate when short circuit fault occurs in a phase line connected with the frame-type circuit breaker body to form a strong magnetic field. The short circuit action triggering mechanism is combined with the short circuit detecting component and provided with a triggering end (246) that is combined with a breaking mechanism in the frame-type circuit breaker body. The short circuit action triggering mechanism works along with the mechanical rotation action of the short circuit detecting component so that the triggering end triggers the breaking mechanism to have a breaking action. The mechanical self-locking mechanism makes the breaking mechanism unable to reset automatically.