Fault indicator having delayed trip circuit

Details Fault indicator having delayed trip circuit Fault indicator having delayed trip circuit

G - Physics

01

R

324/58.01

G01R 31/02 (2006.01)

Patent

CA 1280168

FAULT INDICATOR HAVING DELAYED TRIP CIRCUIT Abstract of the Disclosure A reset coordinated fault indicator for indicating the occurrence of a fault current in a monitored conductor includes an electrically actuated indicator flag. A trip circuit within the fault indicator impulses the indicator flag from a normal reset-indicating state to a fault- indicating state following the occurrence of a fault current in the conductor. A reset circuit periodically impulses the indicator flag to the reset-indicating state upon restor- ation of power to the conductor. To preclude simultaneous actuation of the trip and reset circuits and consequent failure of the indicator flag to register a fault, the trip circuit, upon the occurrence of a fault, first actuates the reset circuit to render the reset circuit inoperative, and then actuates the trip circuit to provide a fault indication.

556530

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