Method and apparatus for detecting a fault location at an electr

Details Method and apparatus for detecting a fault location at an electr Method and apparatus for detecting a fault location at an electr

1975-06-30

1976-09-28

Wise, Edward J.

Registers

Transfer mechanism

Traveling pawl

324 52, 324 73PC, G01R 3108, G06G 712

Patent

active

039833771

ABSTRACT:
A method of, and apparatus for, detecting a fault location at an electrical conductor which entails forming a wave voltage and therefrom together with a measurement voltage a first wave function and a second wave function. Weighted functions are formed by multiplication of the first and second wave functions with a substantially cosine-type and sine-type signal, respectively, of a predetermined reference frequency. Integral functions are formed from the weighted functions. There is formed the product difference from those integral functions produced by cosine and sine weighting, respectively, of the first and second wave functions and integration, and/or the product sum from those integral functions formed by cosine weighting of the first and second wave functions or sine weighting of the first and second wave functions, respectively, and there is checked the sign of at least one of such product polynomials.

REFERENCES:
patent: 3735248 (1973-05-01), Reese
patent: 3777129 (1973-12-01), Mehia
patent: 3812420 (1974-05-01), Gunter
patent: 3831160 (1974-08-01), Cronin et al.

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