Latch for an electrical device

Details Latch for an electrical device Latch for an electrical device

H - Electricity

01

H

H01H 3/28 (2006.01) H01H 3/62 (2006.01) H01H 71/50 (2006.01) H01H 71/52 (2006.01)

Patent

CA 2496456

An electrical device, such as a circuit breaker, for interrupting the flow of current, which includes a stationary contact, a blade having a movable contact, a releasably latchable trip lever, a bimetal, and a magnetic armature. The movable contact is movable into and out of engagement with the stationary contact. The trip lever is releasable from a latched position for movement to a tripped position to cause separation of the stationary and movable contacts. The bimetal causes the release of the trip lever from the latched position by having the armature drawn a predetermined distance in response to a predetermined short circuit current. The trip lever is held in the latched positioned by a hardened latch having a minimal surface area, which is positioned near an opening located in the armature. When the predetermined short circuit current flows through the bimetal, the trip lever moves to the tripped position.

L'invention porte sur un dispositif électrique tel qu'un disjoncteur permettant d'interrompre l'écoulement de courant. Ce dispositif comprend un contact fixe, une lame à contact mobile, un levier de déclenchement verrouillable amovible, une bilame et un induit magnétique. Le contact mobile va et vient contre le contact fixe. Le levier de déclenchement passe d'une position verrouillée à une position déclenchée de façon à séparer les contacts fixe et mobile. La bilame entraîne la libération du levier de déclenchement lorsque l'induit est tiré sur une distance prédéterminée en réaction à un courant prédéterminé de court-circuit. Le levier de déclenchement est maintenu dans sa position verrouillée par un élément de verrouillage renforcé ayant une surface minimale et positionné près d'un orifice ménagé dans l'induit. Lorsque le courant prédéterminé du court-circuit s'écoule dans la bilame, le levier de déclenchement se déclenche.

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