Method and apparatus for determining the direction of a fault on

Details Method and apparatus for determining the direction of a fault on Method and apparatus for determining the direction of a fault on

1978-02-08

1981-02-17

Strecker, Gerard R.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

361 80, G01R 3108, H02H 326

Patent

active

042517664

ABSTRACT:
Directional relay and method for monitoring at least one A.C. power transmission line to determine the position of a fault on the line with respect to a measurement location thereon.
According to a representative embodiment characteristic parameters, typically the respective phases, of a first signal representing the difference of complex voltages after and before the occurrence of the fault and of a second signal representing the line current after the occurrence of the fault, are compared, the result of the comparison providing the desired indication.

REFERENCES:
patent: 3281673 (1966-10-01), Richardson
patent: 3474333 (1969-10-01), Hoel
patent: 3723864 (1973-03-01), Ricard
patent: 3800215 (1974-03-01), Souillard
patent: 3931502 (1976-01-01), Kohlas
patent: 4063300 (1977-12-01), Paddison et al.
patent: 4110684 (1978-08-01), Gale

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