Method and device for detecting a ground-fault direction in an electric three-phase network

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United States of America Patent

PATENT NO 10281514
APP PUB NO 20180011135A1
SERIAL NO

15543146

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Abstract

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The invention relates to a method for ascertaining an earth fault and the earth-fault direction in a three-phase network which is operated in a compensated manner or in an insulated manner. Value pairs of a zero voltage and a zero current are measured, the active or reactive energy is calculated, and a voltage flag and a current flag are combined by a Boolean link, wherein the presence of a earth fault is ascertained depending on the result, and a decision is made as to whether the earth-fault direction is signalled as “forward” or “reverse” at least on the basis of the sign of the active or reactive energy.

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Patent Owner(s)

  • NSE AG

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Aebersold, Andreas Waltenschwil, CH 1 3

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