Arrangement for injection-based ground fault protection handling

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United States of America Patent

PATENT NO 10962604
APP PUB NO 20200103453A1
SERIAL NO

16528076

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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An arrangement for injection-based ground fault protection handling including a number of stator windings of an electric machine that are connected to a neutral point, a first transformer including at least one primary winding connected to at least one measurement point of the stator windings and at least one secondary winding for measuring an electrical quantity of the machine at the measurement point. There is also a second transformer having a primary winding connected between the neutral point and a ground potential and a secondary winding for connection to a signal generation and detection unit in order to inject a signal into the neutral point and receive a response. The impedance of the second transformer is in the range of the impedance of the machine.

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Patent Owner(s)

  • ABB SCHWEIZ AG

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bengtsson, Tord Västerås, SE 24 153
Gajic, Zoran Västerås, SE 18 149
Roxenborg, Stefan Västerås, SE 8 23
Sehlstedt, Mikael Nordingrå, SE 2 2

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