Fault indicator

Details Fault indicator Fault indicator

G - Physics

01

R

324/58.4

G01R 31/08 (2006.01) G01R 19/15 (2006.01) G01R 19/165 (2006.01)

Patent

CA 1124796

Case 790603 FAULT INDICATOR Abstract of the Disclosure An automatically resettable fault indicator includes a rotatably-mounted target viewable from the exterior of the indicator for indicating circuit status. The target is positioned in a reset-indicating state by a reset circuit which periodically energizes a first winding to position a permanent magnet mounted for rotation with the target. Upon occurrence of a fault circuitry within the indicator energizes a second winding to reposition the target to a fault-indicating position. A delay circuit in the fault-responsive circuitry prevents simultaneous energization of the first and second windings, and an auxiliary pole piece associated with the main pole piece assists in repositioning the target to the fault-indicating position, for improved performance and reliability in responding to fault currents.

330053

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