H - Electricity – 02 – H
Patent
H - Electricity
02
H
348/24
H02H 7/045 (2006.01) H02H 3/16 (2006.01) H02H 3/28 (2006.01)
Patent
CA 1200594
19 ABSTRACT OF THE DISCLOSURE Differential protective relay methods and appa- ratus which include a differential current function super- vised by both a harmonic restraint function and a voltage- change function. The voltage change function determines whether or not the differential current function requires harmonic restraint supervision, preempting such super- vision when it is not required, to enable faster trip decisions to be made by the differential current function.
430022
Oldham And Company
Westinghouse Electric Corporation
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