Fault indicator with magnetic test point

Details Fault indicator with magnetic test point Fault indicator with magnetic test point

G - Physics

01

R

324/58

G01R 31/08 (2006.01)

Patent

CA 1171909

Case 790429 FAULT INDICATOR WITH MAGNETIC TEST POINT Edmund O. Schweitzer, Jr. Abstract of the Disclosure A fault indicator for use in conjunction with components of a power distribution system contained within a protective enclosure includes a magnetic test point on the exterior surface of the enclosure for indicating the occurrence of a fault in associated circuits of the system. The fault indicator includes a circuit module mounted on a conventional test-point provided on one of the system components, and a magnetic indicator module mounted on the wall of the enclosure. The indicator module includes a magnetizable element which extends through the wall of the housing to provide a magnetic test point. Upon occurrence of a fault in the system, circuitry within the indicator module energizes a first winding in the indicator module to establish a magnetic state of a first polarity at the test point. Upon restoration of power, a reset circuit energizes a second winding to establish a magnetic state of opposite polarity at the test point. A portable test instrument comprising a hand held housing on which a magnetized flag member is rotatably mounted is positioned adjacent the magnetic test point by a lineman to determine circuit status.

362842

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