Abstract: An alarm assembly for use with a circuit breaker is provided. The assembly is used with the flux shunt trip device of the circuit breaker. The flux shunt trip device has a plunger which moves from a retracted position to an extended position to interrupt current through the circuit breaker upon a predetermined condition. The assembly includes an actuating member mounted in engageable relationship with the plunger so that when the plunger moves to its extended position, the actuating member moves to an actuated position. In the actuated position, the actuating member contacts a switch mechanism to actuate a switch which may be connected to an alarm or light indicator to identify that the circuit breaker has tripped. The actuating member remains in its actuated position until it is manually reset. A mechanism is provided for reset of the device.

Abstract: A circuit breaker including an improved means of retaining an arc grid assembly within the arc grid assembly cavity defined by the housing of the circuit breaker. The means of retaining the arc grid assembly within the arc grid assembly cavity is the arc grid assembly has a framework formed of a rigid material that may be temporarily plasticized and is inserted within the arc grid assembly cavity while it is in the temporarily plasticized state, wherein said framework rigid material hardens and is retained by restraining means such as lugs which are placed upon the housing of the circuit breaker which defines the arc grid assembly cavity.