The present disclosure relates to a circuit breaker equipped with an energy release device of a switching mechanism, and particularly, to a circuit breaker equipped with an energy release device that allows energy of a closing spring of a switching mechanism to be automatically discharged at the time of a withdrawal operation.

The present disclosure relates to a circuit breaker equipped with an energy release device of a switching mechanism, and particularly, to a circuit breaker equipped with an energy release device that allows energy of a closing spring of a switching mechanism to be automatically discharged at the time of a withdrawal operation.

A snap-action drive for a switching device has an energy store, a swinging movable part and a securing device for the movable part. The securing device secures a position of the swinging movable part by a force effect, wherein a reversal of direction of the movable part takes place counter to the force effect.

A mechanism for controlling a current switching device. The mechanism includes: an arming lever; an arming disc secured to an arming shaft, movable between a first position and a second position; and a loading pawl which can pivot between a position in which the arming lever drives the arming disc via the loading pawl and a position in which the arming lever is free, rotation of the arming lever causing the arming disc to go from the first position to the second position whilst constraining an elastic member. The mechanism further includes: an end stop for retaining the arming disc; a closing lever configured to trigger closing of the current switching device; and an elastic member configured to move the loading pawl from the position in which the arming lever drives the arming disc to the position in which the arming lever is free when the arming disc is retained by the end stop whilst driving the closing lever so as to close the current switching device.

A snap-action drive for a switching device has an energy store, a swinging movable part and a securing device for the movable part. The securing device secures a position of the swinging movable part by a force effect, wherein a reversal of direction of the movable part takes place counter to the force effect.