Trip indicator assembly for electronic circuit breaker

Claim 1

A trip indicator assembly corresponding to a predetermined type of fault current for use in a circuit breaker having interruption means operable for interrupting a plurality of line conductors and including detecting means for detecting any one of a plurality of different type of fault current one of which corresponds to said indicator and for operating said interrupting means to interrupt said line conductors, the improvement comprising, a coil energized by said detecting means in response to the detection of a fault current corresponding to said predetermined type, an armature for said coil movable between a normal position and an operated position, a permanent magnet for retaining said armature in said normal position in response to movement of said armature from said operated position to said normal position, a spring biasing said armature for movement from said normal position to said operated position and effective in response to energization of said coil for moving said armature to said operated position, an indicator carried by said armature, a movable viewing window rendering said indicator visible in response to movement of said armature to said operated position, said window movable in one direction to move said armature to said normal position for enabling said magnet to retain said armature in said normal position, and bias means biasing said viewing window opposite said one direction to a position in which said indicator is visible in response to movement of said armature to said operated position.