Fault indicator having improved trip inhibit circuit

Details Fault indicator having improved trip inhibit circuit Fault indicator having improved trip inhibit circuit

G - Physics

01

R

348/41, 324/58

G01R 19/14 (2006.01) G01R 19/165 (2006.01)

Patent

CA 1266703

PATENT Case 851118 FAULT INDICATOR HAVING IMPROVED TRIP INHIBIT CIRCUIT Edmund O. Schweitzer, Jr. Abstract of the Disclosure A fault indicator for indicating the occurrence of a fault current in a monitored conductor includes an electrically actuated indicator flag. Trip circuitry within the fault indicator conditions the indicator flag from a normal reset-indicating state to a fault-indicating state upon the occurrence of a fault current in the conductor. Improved high impedance trip inhibiting circuitry inhibits the trip function following a loss of voltage in the conductor whereby the fault indicator is rendered insensitive to inrush current during a period immediately following restoration of power to the system.

524820

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