E.on Se

Gigaset Communications Gmbh

E.on Digital Technology Gmbh

Nicholas Ord

Erich Kamperschroer

Werner Goertz

Florian Fecher

Maria Garbuzova-Schlifter

Eugenio Scionti

Laura Antonia Färber

Flore De Durfort

Katharina Sommerkamp

Thorsten Kühnel

Alexandra Schön

Renee Obermeir

The invention relates to a method, a device () and an arrangement () for monitoring alternating current electric apparatuses (), like e.g. power distribution transformers. The inventive method relies on an inductor antenna (') suitable to detect the electromagnetic field at the frequency of the alternating current the apparatus () to be monitored is supplied with arranged in the vicinity of but distant to the apparatus () to be monitored and comprises the steps: &#x2014;Detecting the electromagnetic field radiated by the electric apparatus () to be monitored; &#x2014;Digitizing the detected electromagnetic field to obtain EMF-data; &#x2014;Running a Fast-Fourier-Transformation on the digitized EMF-data to obtain FFT-transformed data; and &#x2014;Monitoring the magnitudes of the FFT-transformed data at least at the frequency of the alternating current the apparatus () to be monitored is supplied with and its third harmonic for anomalies. The inventive device () and arrangement () are configured to perform the inventive method.

Method, device and arrangement for monitoring alternating current electric apparatuses

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Munich, Germany

Nicholas Ord