Importance

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Abstract

A circuit breaker comprising a switch for controlling the connection of a load to a power source, the switch having a fixed contact and a movable switch contact supported on a pivotable switching member and resiliently biased away from the fixed contact. The circuit breaker includes a solenoid having a first winding for initially moving the movable contact towards the fixed contact and a second winding for holding the movable contact against the fixed contact, a fault detection circuit adapted to detect a fault at the load and in response to disable the solenoid, and a reset switch for initially enabling energization of the first winding and when the movable contact is sufficiently close to or in contact with the fixed contact for subsequently enabling energization of the second winding. The reset switch is arranged to be operated by a part of the switching member by virtue of the movement of the movable contact in order to control energization of the windings.

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First Claim