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

1998-04-30

2000-01-11

Leja, Ronald W.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361157, 361115, 324127, 324151R, 340650, H02H 300

Patent

active

060143010

ABSTRACT:
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.

REFERENCES:
patent: 4424512 (1984-01-01), Schweitzer, Jr.
patent: 4458198 (1984-07-01), Schweitzer, Jr.
patent: 4495489 (1985-01-01), Schweitzer, Jr.

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