H - Electricity – 02 – H
Patent
H - Electricity
02
H
H02H 3/00 (2006.01) H02H 1/00 (2006.01) H02H 3/093 (2006.01) H02H 7/26 (2006.01)
Patent
CA 2264596
An adaptive method and apparatus for detecting fault conditions in a power distribution system that services both single phase loads and three phase loads. The present invention accomplishes this by providing an adaptive ground fault detection method and an adaptive phase fault detection method. Both methods provide the capability to distinguish gradual changes in phase current, due to ordinary current fluctuations, from more substantial changes in phase current due to various fault conditions. By making this distinction, the present invention minimizes unnecessary service interruptions.
Appareil et méthode adaptatifs qui servent à détecter les états anormaux dans un système de distribution d'énergie alimentant des charges en monophasé et en triphasé. La présente invention propose une méthode adaptative de détection de défaut à la terre et une méthode adaptative de détection de rupture de phase. Les deux méthodes offrent la possibilité de distinguer les changements graduels du courant de phase dus aux variations normales du courant des changements du courant de phase plus importants, qui sont provoqués par divers états anormaux. En faisant cette distinction, le dispositif de la présente invention permet de réduire au minimum les interruptions de service superflues.
Cooper Industries Inc.
Smart & Biggar
LandOfFree
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