Patent ID: 8861155
Filing Date: 2014-10-14
Classification: G01R,H02H

Abstract:
1. A high-impedance fault detection and response system for a three phase electric power line having three phase conductors, comprising: a set of three current phase sensors, each electrically coupled to and asynchronously monitoring phase current flowing in an associated phase conductor; each current phase sensor having a data buffer for storing a recent history phase current waveform data file for its associated phase current; an event detector operative for event detection of a potential high-impedance fault on the electric power line; each current phase sensor operative for uploading its recent history phase current waveform data file in response to the event detection; a controller operative for receiving the recent history phase current waveform data files, computationally sequencing the phase current waveforms, and analyzing the sequence currents to verify that a high-impedance fault has occurred and identify a faulted phase involved in the high-impedance fault.