Series arc fault diagnostic for aircraft wiring

Details Series arc fault diagnostic for aircraft wiring Series arc fault diagnostic for aircraft wiring

2005-04-19

2005-04-19

Le, N. (Department: 2858)

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

For fault location

C324S539000, C324S544000

Reexamination Certificate

active

06882158

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.

REFERENCES:
patent: 5223795 (1993-06-01), Blades
patent: 5323117 (1994-06-01), Endoh et al.
patent: 5432455 (1995-07-01), Blades
patent: 5434509 (1995-07-01), Blades
patent: 5729145 (1998-03-01), Blades
patent: 5949230 (1999-09-01), Kobayashi et al.
patent: 6130540 (2000-10-01), Achatz
patent: 20010052778 (2001-12-01), Smith
patent: 20010054902 (2001-12-01), Smith et al.

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