Series arc fault diagnostic for aircraft wiring
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United States of America Patent
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-
Apr 19, 2005
Grant Date -
Jul 25, 2002
app pub date -
Jan 23, 2002
filing date -
Jan 24, 2001
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A device for measuring the AC voltage drop across a series of connections under load with no direct electrical contact to the conductors. The presence of a substantial resistance at series contacts is indicative of a series arcing fault. The device comprises a capacitive probe for clamping to the outer insulation layer of the wire to sense a first voltage at a first node. The device further comprises a floating high-impedance meter having a ground reference coupled to the source of common-mode voltage at a second node, the floating high-impedance meter being adapted to measure a voltage difference between the two nodes and being further adapted to indicate the presence of the series fault when the measured voltage exceeds a predetermined level.
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