Patent ID: 6952149
Filing Date: 2005-10-04
Classification: H01H

Abstract:
1. A circuit breaker, comprising: a housing; an operating mechanism operable from outside of the housing; a cassette having side walls and operatively connected to the operating mechanism, the cassette comprising: a separable current path having a movable contact arm and two contact pairs, the movable contact arm responsive to the operating mechanism and a short circuit overcurrent condition and positionable in a closed position, an open position, and a blown open position; two arc receptors each disposed for receiving an electrical arc at each of the two contact pairs in response to a short circuit overcurrent condition separating the separable current path; and two slot motors each disposed proximate the movable contact arm for magnetically driving the movable contact arm to the blown open position in response to a short circuit overcurrent condition, the slot motors each having two side legs opposing each other and defining a space therebetween for receiving the movable contact arm, each side leg having a magnetic core and an insulative layer and being biased toward the interior of the side walls of the cassette; wherein each side leg is restrained from being magnetically attracted toward the movable contact arm during a short circuit condition.