G - Physics – 01 – R
Patent
G - Physics
01
R
324/58.4
G01R 31/08 (2006.01) G01R 19/14 (2006.01) G01R 19/15 (2006.01) G01R 19/165 (2006.01) G01R 31/02 (2006.01)
Patent
CA 1158315
Case 790418 FAULT INDICATOR WITH FLUX CONCENTRATING MEANS Abstract of the Disclosure A fault indicator for indicating the occurrence of a fault current in an electrical conductor includes an externally viewable target which is positioned to a fault- indicating position by a trip circuit within the indicator upon occurrence of a fault current. The trip circuit is responsive to a magnetic field within a predetermined sensing plane generally parallel to the conductor. To increase the sensitivity of the indicator to the magnetic field of the conductor, the fault indicator includes flux concentrating pole pieces which form a low reluctance magnetic circuit between the circumference of the conductor and the sensing plane.
368269
Osler Hoskin & Harcourt Llp
Schweitzer Edmund O. Jr.
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