Radio-interrogated, surface-wave technology current...

G - Physics – 01 – R

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G01R 19/00 (2006.01) G01R 15/18 (2006.01) G01R 15/20 (2006.01) G01R 15/26 (2006.01)

Patent

CA 2218586

The current transformer of the invention for high/medium voltage installations has a magneto-sensitive device which is connected to a surface wave structure as a terminating element of a surface wave arrangement. The reply signal of the surface wave arrangement is the information on current intensity/direction and phase of the current momentarily flowing in the installation which is evaluated by the ground station. Radio transmission means that there are no electrical insulation problems and the use of a radio-interrogatable surface wave arrangement makes the section of the whole current transformer at high potential a passive component thereof.

L'invention concerne un transformateur de courant pour installations haute/moyenne tension, équipé d'un élément magnétosensible, qui est connecté à une structure à ondes de surface, en tant que terminaison d'une structure à ondes de surface d'un système à ondes de surface. Le signal de réponse du système à ondes de surface est l'information concernant l'intensité/la direction du courant et la phase du courant circulant momentanément dans l'installation, qui est évaluée par la station au sol. La radiotransmission évite l'émergence de problèmes d'isolation électrique, et l'utilisation d'un système à ondes de surface interrogeable par radio fait de la partie de l'ensemble du transformateur de courant se trouvant à un potentiel élevé, un élément passif dudit transformateur.

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