Patent ID: 6487057
Filing Date: 2002-11-26
Classification: H01H,H02H

Abstract:
A circuit breaker comprising:a pair of separable contacts forming a first pole; an operating mechanism for operating said electrical contacts; electronic trip circuit responsive to currents flowing through said first pole for operating said operating mechanism in response to predetermined current conditions to open said separable contacts; means for operating said operating mechanism in response to a failure in said electronic trip circuit; wherein said means for operating said operating mechanism in response to a failure in said electronic trip circuit comprises: a solenoid electrically connected to said electronic trip circuit, said solenoid being energized in response to said failure in said electronic trip circuit; a plunger in said solenoid; a linkage assembly for operating said operating mechanism in response to movement of said plunger; wherein said linkage assembly comprises: an operating arm pivotally mounted adjacent to said solenoid such that movement of said plunger causes said operating arm to pivot about a pivot point; and a cable connecting said operating arm to said operating mechanism for operating said electrical contacts, whereby movement of said operating arm causes said operating mechanism to open said contacts.