Protective relaying methods and apparatus

Details Protective relaying methods and apparatus Protective relaying methods and apparatus

1981-11-13

1983-08-09

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

324 51, 361 79, H02H 316

Patent

active

043982328

ABSTRACT:
Methods and apparatus for detecting a single-phase-to-ground fault on a three-phase electrical power system, and for identifying a faulted phase. A single-phase-to-ground fault is correctly distinguished from other faults, including phase-to-phase-to-ground faults, even with transmission lines which utilize series capacitors, by taking into consideration the phase-to-phase voltage which is in quadrature with the voltage to ground of the monitored phase.

REFERENCES:
patent: 4146913 (1979-03-01), Sun

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