Fault indicator having improved trip inhibit circuit

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

1986-03-28

1988-12-27

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Nonquantitative

324522, 324509, 340664, G01R 1914

Patent

active

047943327

ABSTRACT:
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.

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