Apparatus for detecting arcing faults on low-voltage spot...

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

H - Electricity

02

H

324/58

H02H 7/00 (2006.01)

Patent

CA 1235180

12 ABSTRACT Of THE INVENTION 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 harm- onics on the phase-to-phase voltages, and the phase cur- rents; 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.

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