Protection system for power receiving station

Details Protection system for power receiving station Protection system for power receiving station

1997-07-29

1999-04-06

Gaffin, Jeffrey

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific quantity comparison means

361 93, 361 62, 361115, H02H 300

Patent

active

058926453

ABSTRACT:
A protection apparatus for a spot network substation has a plurality of receiving lines connected between a network bus and a plurality of power sources. Each receiving line is connected to a primary switching device, a network transformer and a protector CB. A detector for detecting a phase of each receiving line voltage and a judging unit for judging the detected phase are provided on the primary side of each network transformer. A previously stored basic phase is compared with the detected phase of the receiving line voltage. If there is a lag in the detected phase of the receiving line voltage, it is judged to be a power-stop of the corresponding power source and the protector CB is tripped.

REFERENCES:
patent: 3947728 (1976-03-01), Smith
patent: 4873601 (1989-10-01), Wakasa

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