Cable fault location

Details Cable fault location Cable fault location

1978-06-13

1979-08-21

Tokar, M.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 58R, G01R 3108

Patent

active

041654820

ABSTRACT:
A fault in a cable comprising at least two conductors is located by applying a single voltage impulse between two conductors of the cable, passing the resultant current wave form through a primary winding of coupling means which comprises said primary winding and a secondary winding, the primary winding being connected in series between the impulse generator and one of said conductors and which obtains the derivative of said current wave form to give a signal output across the secondary winding, and displaying or recording the signal output. The signal output is a pulse of relatively short duration each time a reflection of the voltage impulse returns to the impulse generator. Preferably a digital transient recorder is used for recording the waveform of the resultant reflected signal from the cable.

REFERENCES:
patent: 3588693 (1971-06-01), Halley
patent: 3909712 (1975-09-01), Rietz

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