Faulty filter detection technique

Details Faulty filter detection technique Faulty filter detection technique

1997-11-12

2000-08-08

Metjahic, Safet

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

For fault location

G01R 3128

Patent

active

061006998

ABSTRACT:
To locate a defective one of filter/voltage arresters (20.sub.1, 20.sub.2, 20.sub.3, 20.sub.4, . . . 20.sub.n-1), each associated with a corresponding one of splice cases (18.sub.1, 18.sub.2, 18.sub.3, 18.sub.4, . . . 18.sub.n-n) on a buried fiber-optic cable (10), an operator employs a locating apparatus (24) to detect the presence of an AM signal within a prescribed frequency range that is radiated when the filter/voltage arrester becomes defective. By determining the location along the cable where the AM signal has its greatest strength, the operator can accurately establish the location of the defective filter/voltage arrester, thereby avoiding unnecessary excavation of each splice case.

REFERENCES:
patent: 4118662 (1978-10-01), Weber
patent: 4143251 (1979-03-01), Clark
patent: 4896117 (1990-01-01), Floweredew
patent: 5361029 (1994-11-01), Rider
patent: 5541516 (1996-07-01), Rider
patent: 5767678 (1998-06-01), Mercer

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