Fault indicator providing contact closure on fault detection

Details Fault indicator providing contact closure on fault detection Fault indicator providing contact closure on fault detection

G - Physics

01

R

G01R 31/02 (2006.01) G01R 31/08 (2006.01)

Patent

CA 2265228

A fault indicator for detecting the occurrence of a fault current in a monitored conductor includes a rotatably mounted indicator flag. The flag is positioned in either a reset indicating or a fault indicating state by a magnetic pole piece, which is magnetized in one magnetic direction or the other by momentary application of a current in one direction or the other to an actuator winding on the pole piece. An auxiliary magnetic circuit comprising an auxiliary pole piece magnetized by the actuator winding, a reed switch and a bias magnet magnetically aligned to oppose the reset magnetic orientation and reenforce the trip magnetic orientation of the magnetic pole piece provides contact closure upon occurrence of the fault current.

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