Apparatus and system for locating thunderstruck point and faulty

Details Apparatus and system for locating thunderstruck point and faulty Apparatus and system for locating thunderstruck point and faulty

1989-11-29

1992-08-11

Wieder, Kenneth A.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

For fault location

324532, 324520, G01R 3108

Patent

active

051382652

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: 4063164 (1977-12-01), Lanz et al.
patent: 4446420 (1984-05-01), Drouet
patent: 4775839 (1988-10-01), Kosina et al.

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