Faulted circuit detector having isolated indicator

Details Faulted circuit detector having isolated indicator Faulted circuit detector having isolated indicator

G - Physics

01

R

G01R 31/08 (2006.01) H02H 3/04 (2006.01) G01R 15/18 (2006.01) G01R 31/02 (2006.01)

Patent

CA 2041861

ABSTRACT A faulted circuit detector having an electrically isolated and remotely positioned indicator detects fault currents in a monitored conductor. When a fault of a predetermined magnitude is detected, a light pulse is transmitted from the detector to the indicator via a fiber optic cable where, upon receipt, the pulse is converted to an electrical pulse causing the indicator to indicate a "fault" state. A reset circuit within the indicator resets the indicator at regular intervals to the "normal" state as long as a predetermined minimum voltage is present on the monitored conductor. A test circuit is also provided to allow service personnel to field test the device with the monitored conductor in an energized state.

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