System and method to zero-sequence verify ground return path...

Details System and method to zero-sequence verify ground return path... System and method to zero-sequence verify ground return path...

2011-05-10

2011-05-10

Dole, Timothy J (Department: 2858)

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of ground fault indication

C340S649000, C361S042000, C323S240000, C323S255000, C336S188000

Reexamination Certificate

active

07940054

ABSTRACT:
A ground return path is determined to be impaired when no zero-sequence current is measured in the neutral return path, but zero-sequence current is detected in other suitable measuring points that include the windings of an autotransformer, or in a magnetically coupled delta-configured tertiary winding, or potential transformer.

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