Ground fault protective apparatus and method

Details Ground fault protective apparatus and method Ground fault protective apparatus and method

H - Electricity

02

H

348/24

H02H 3/28 (2006.01)

Patent

CA 1063225

GROUND FAULT PROTECTIVE APPARATUS AND METHOD ABSTRACT OF THE DISCLOSURE Apparatus for protecting power distribution net- works from damage due to ground faults comprises a plurality of groups of zero sequence current monitors, each group sur- rounding all branches of the network which enter a zone of protection. Each group is electrically connected to produce an output signal corresponding to the vector sum of dif- ferential currents flowing into and out of the zone. Each group is connected to a ground fault relay which will trip when the vectorial sum of the differential currents entering or leaving a zone is above a predetermined level.

279667

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