FAST-ACTING AUTOMATIC CIRCUIT-BREAKER Russian patent published in 2008 - IPC H01H73/36 H01H71/24 

FIELD: electric engineering.

SUBSTANCE: automatic circuit breaker contains flat rectangular terminals with "П" shaped slots, mechanism of free release, contact system that consists of fixed contacts installed in terminals and movable contacts found in two-arm lever mounted with the possibility of interaction with fixed contacts and mechanism of free release. In the beginning and in the end of every "П"-shaped slot through openings are provided. Pushers with spherical head are installed in the openings. On every pusher from the front side of terminal electroconductive and electric insulating discs are installed, and on the back side of terminal electric insulating and ferromagnetic plates are mounted. Calibrated spring is installed between plates and terminal on the pusher. At that pushers are installed with the possibility of effect at lever and at least one of pushers is connected to the mechanism of free release.

EFFECT: higher fast-action of automatic circuit-breaker in case of disconnection of high short-circuit currents.

6 dwg