Switchgear for a single-phase motor and a three-phase motor

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United States of America Patent

PATENT NO 9851404
APP PUB NO 20150241514A1
SERIAL NO

14423903

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Importance

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Abstract

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An embodiment relates to a switchgear for a single-phase motor and a three-phase motor, the switchgear including a processing unit and a first, second and third current path, the first and third current path each including a current transformer. The processing unit is adapted to detect the current I1 of the first current path and the current I3 of the third current path. To provide a cost-effective switchgear for a one-phase motor and a three-phase motor which is adapted to identify the failure of every single phase in the three-phase operation and a phase failure in the one-phase operation, the processing unit is designed such as to detect the currents I1, I3 of the first and third current path and to determine, based on the phase shift between the detected currents I1, I3 of the first and third current path in which operating mode the switchgear is operated.

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First Claim

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Patent Owner(s)

  • SIEMENS AKTIENGESELLSCHAFT

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hertz, Dirk Fichtenhof, DE 15 34
Schönenberg, Marco Kuemmersbruck, DE 4 5
Steuer, Helene Nuremberg, DE 1 0
Zitzler, Stefan Schwandorf, DE 6 7

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