Remote light indication fault indicator with a timed reset circu

Details Remote light indication fault indicator with a timed reset circu Remote light indication fault indicator with a timed reset circu

1998-06-29

2000-10-17

Metjahic, Safet

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Nonquantitative

324522, G01R 1914

Patent

active

061337242

ABSTRACT:
A fault indicator contained within a protective equipment closure of the type used to house pad-mounted components of a power distribution system detects the occurrence of a fault current in a monitored conductor and provides a light indication thereof. The fault indicator includes a circuit monitoring module, having an integral fault indicator flag module, and a remote fault indicator light module. A status-indicating flag is rotatably mounted in the integral fault indicator flag module. The flag is positioned in either a reset indicating position or a fault indicating position 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. A magnetically actuated reed switch in an auxiliary magnetic circuit comprising an auxiliary pole piece magnetized by the actuator winding and a bias magnet magnetically aligned to oppose the reset magnetic orientation and reenforce the trip magnetic orientation of the magnetic pole piece closes upon occurrence of the fault current to connect an internal battery to an LED contained within the remote fault indicator light module so that the LED is visible from the exterior of the protective equipment enclosure. The light indication of the fault occurrence may be reset automatically by a timed reset circuit or manually by a manual reset circuit.

REFERENCES:
patent: 3413548 (1968-11-01), Schweitzer, Jr.
patent: 4165528 (1979-08-01), Schweitzer, Jr.
patent: 4234847 (1980-11-01), Schweitzer, Jr.
patent: 4424512 (1984-01-01), Schweitzer, Jr.
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patent: 4458198 (1984-07-01), Schweitzer, Jr.
patent: 4686518 (1987-08-01), Schweitzer, Jr.
patent: 4794332 (1988-12-01), Schweitzer, Jr.
patent: 4795982 (1989-01-01), Schweitzer, Jr.
patent: 5008651 (1991-04-01), Schweitzer, Jr.

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