G - Physics – 01 – R
Patent
G - Physics
01
R
G01R 31/02 (2006.01) B60L 9/00 (2006.01)
Patent
CA 2632677
Apparatus is provided for detecting an incipient electrical ground fault. The apparatus includes a sensor (72) to sense a ground leakage signal. The apparatus may further include a correlator (86) coupled to sensor (72) to receive the ground leakage signal, and at least one signal (88) indicative of a respective energization state of a respective electrical phase of an electrical device. The correlator (86) individually correlates the ground leakage signal with each received phase energization state signal (88), and supplies an individual correlation signal between the received ground leakage signal and each received phase energization state signal. A processor (92) is coupled to the correlator (86) for processing each of the individual correlation signals and extract a correlation value from the supplied correlation signals. The correlation value may be indicative of an incipient ground fault in a respective electrical phase of the electrical device.
Company General Electric
Craig Wilson And Company
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