Directional relays

Details Directional relays Directional relays

1976-07-19

1978-12-19

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific quantity comparison means

361 84, 361 86, H02H 326

Patent

active

041308514

ABSTRACT:
A directional relay for a polyphase electric power transmission system wherein the direction of a fault from the relaying point is determined by determining the sense of the variation of the zero or negative sequence voltage of the system between the relaying point and the fault point.

REFERENCES:
patent: 2922109 (1960-01-01), Hodges et al.
patent: 3048744 (1962-08-01), Warrington
patent: 3651377 (1972-03-01), Souillard
patent: 3898530 (1975-08-01), Perez-Cavero
patent: 3958153 (1976-05-01), Narayan
"A New Single-Phase-to-Ground Fault-Detecting Relay", W. K. Sonnemann, Sep. 1942, vol. 61 Electrical Engr., pp. 677-680.

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