Apparatus and system for locating a point or a faulty point in a

Details Apparatus and system for locating a point or a faulty point in a Apparatus and system for locating a point or a faulty point in a

1991-02-06

1992-06-30

McGraw, Vincent P.

Optics: measuring and testing

Optical pyrometers

With sample engaging rod or tube

25022714, 374161, G01J 358

Patent

active

051257386

ABSTRACT:
A plurality of current detectors are provided in a plurality of prescribed spots of a transmission line for locating a fault caused, e.g. by lightning. A plurality of discriminators are provided in correspondence to the plurality of current detectors. Each discriminator receives detected signals from an arbitrary pair of the plurality of current detectors for detecting a relative difference between arrival times of the detected signals while extracting low-frequency components from the detected signals respectively and for detecting a phase difference between the extracted low-frequency components. A locator receives relative time difference data and phase difference data from the plurality of discriminators, to locate a faulty point in the transmission line on the basis of the received data.

REFERENCES:
patent: 4298794 (1981-11-01), Snitzer et al.
patent: 4823166 (1989-04-01), Hartog et al.
patent: 4859065 (1989-08-01), Bibby

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