Shield integrity monitor

Details Shield integrity monitor Shield integrity monitor

1994-06-29

1995-10-31

Wieder, Kenneth A.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

For fault location

324652, 324619, 324520, 370 13, G01R 3102

Patent

active

054633176

ABSTRACT:
An apparatus which can non-intrusively verify the integrity of shielding on electrical wiring. The method utilizes the natural resonance of the voltage transfer function of the shielded wire. The frequency of this resonance is an indication of the self inductance of the cable. A change in the resonant frequency indicates a change in the self inductance caused by a failure in the shield circuit.

REFERENCES:
patent: 1462053 (1923-07-01), Stoller
patent: 2499001 (1950-02-01), Green
patent: 2741740 (1956-04-01), Beck
patent: 3299351 (1967-01-01), Williams
patent: 3667034 (1972-05-01), Freeze
patent: 3728620 (1973-04-01), Heins
patent: 3781665 (1973-12-01), Gale
patent: 3803484 (1974-04-01), Gray
patent: 4851782 (1989-07-01), Jeerings et al.

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