Earth leakage trip indicator

A circuit breaker for use in a system having line, neutral and ground leads, comprising:

• a housing;
• a breaker assembly in said housing for making and breaking an electrical connection between a movable contact and a stationary contact;
• an operating handle, having an on position with said contacts closed, an off position with said contacts open and an intermediate position with said contacts open, for the breaker assembly;
• means for sensing over-current and thereby tripping said breaker assembly;
• an additional tripping mechanism for tripping said breaker assembly;
• said breaker handle moving to said intermediate position for indicating when the breaker assembly has been tripped by said additional tripping mechanism;
• said over-current sensing means including a coil and an armature core in said coil, the armature core having an axial bore extending therethrough, said additional tripping mechanism comprising;
• plunger means mounted within the axial bore of the armature core;
• an actuating device for controlling the movement of said plunger means from a non=tripping position to a tripping position;
• said plunger means being independently movable through the axial bore in the armature core when moving between said non-tripping and said tripping position;
• and
• means for re-setting said plunger means to said non-tripping position.