Segregated phase comparison system

Details Segregated phase comparison system Segregated phase comparison system

1975-02-07

1976-06-15

Miller, J D

317 29A, 317 36D, H02H 328

Patent

active

039639649

ABSTRACT:
This disclosure relates to phase comparison relaying systems for a three phase power transmission line in which the current is measured at each end of each phase conductor. The phasor difference of the currents in a selected two of the phase conductors is determined at each end of the selected conductors and is phase compared to determine the location of phase-to-phase faults whether or not a ground fault is involved while the phasor sum of the current in all three of the phase conductors is determined at each end of the phase conductors and is phase compared to determine the location of phase-to-ground faults.

REFERENCES:
patent: 3339115 (1967-08-01), Calhoun
patent: 3882361 (1975-05-01), Hinman
patent: 3893008 (1975-07-01), Strickland et al.

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