G - Physics – 01 – R
Patent
G - Physics
01
R
G01R 15/24 (2006.01)
Patent
CA 2173143
Method and arrangement for measuring an electric current with two opposing light signals, using the Faraday effect For measuring an electric current (I) in a current conductor (2), two opposing light signals (S, T) are transmitted through a Faraday element (3) surrounding the current conductor (2) and, after the passage through the Faraday element (3), are split, respectively, into two partial light signals. From these partial light signals, an intensity-normalized signal (PS, PT) is derived for each partial light signal (S, T). Provision is made of a Faraday element (3) having a negligible circular birefringence, and a signal processing unit for deriving a vibration-independent and temperature-independent measured signal (M).
Afin de mesurer un courant électrique (I) dans un conducteur (2), deux signaux lumineux (S, T) opposés passent par un élément Faraday (3) entourant le conducteur (2) et sont ensuite répartis en deux signaux lumineux partiels après avoir traversé l'élément Faraday (3). Un signal (PS, PT) d'intensité normalisée est ensuite dérivé de ces signaux lumineux partiels (S, T). Il est prévu un élément Faraday (3) à biréfringence circulaire négligeable et un système de traitement des signaux pour dériver un signal de mesure (M) indépendant des vibrations et de la température.
Bosselmann Thomas
Menke Peter
Aktiengesellschaft Siemens
Fetherstonhaugh & Co.
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