Apparatus for detecting arcing faults on low-voltage spot networ

Details Apparatus for detecting arcing faults on low-voltage spot networ Apparatus for detecting arcing faults on low-voltage spot networ

1984-05-15

1986-08-19

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Feeder protection in distribution networks

361 63, 361 65, 324 51, 324 86, 324108, H02H 700

Patent

active

046073094

ABSTRACT:
A protective relay for detecting power arcing faults on a three-phase electrical power spot network. A phase-to-phase power arc on a spot network produces harmonics on the phase-to-phase voltages, and the phase currents; a phase-to-ground arc produces harmonics on the phase-to-neutral voltages. The protective relay of the present invention monitors one or more of the three phase-to-phase voltages, the three phase-to-neutral voltages, or the three phase currents and indicates a fault based on the harmonic content of those signals.

REFERENCES:
patent: 3192442 (1962-06-01), Warrington et al.
patent: 3970897 (1976-07-01), Tamir et al.
patent: 4333050 (1982-01-01), Yeasting
patent: 4409636 (1983-10-01), Brandt et al.

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