Arrangement for supplying electrical energy to a measuring...

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Details

G01R 15/14 (2006.01) G01R 15/06 (2006.01) H02J 17/00 (2006.01)

Patent

CA 2577930

The invention relates to an assembly for supplying an electric measuring device at a high-voltage potential with electric energy. The assembly comprises at least one first transformer (T1) on the ground potential side, said transformer having a primary side, to which a generator (3) is attached in order to generate a feed signal (Us) that supplies energy, and a symmetrically sub-divided secondary side, whose division point (K3) is connected to the ground potential (20). The assembly also comprises at least one second transformer (T2) on the high-voltage potential side, said transformer having a symmetrically sub-divided primary side, whose division point (K4) is connected to the high-voltage potential, and a secondary side, to which the measuring device (1) can be connected for the energy supply. In addition, the assembly comprises at least one symmetrically configured transmission element (90), which attenuates the potential and is equipped with two parallel sub-branches (Z1, Z2) running between the secondary side of the first transformer (T1) and the primary side of the second transformer (T2). To divide the voltage, each respective transmission element comprises at least two voltage dividers (C1, C2, C3, C4) with an intermediate node point (K1, K2). The respective transmission element can be connected to the measuring device (1) via both node points (K1, K2) by means of a respective line (E1, E2) in order to measure the voltage.

L'invention concerne un ensemble pour alimenter en énergie électrique un appareil de mesure électrique à potentiel haute tension. L'ensemble comprend au moins un premier transformateur (T1) côté potentiel terrestre, ce transformateur étant pourvu d'une face primaire, à laquelle est raccordé un générateur (3) qui émet un signal d'alimentation (Us) en énergie, et d'une face secondaire à cloisonnement symétrique dont l'emplacement de cloisonnement (K3) est en potentiel terrestre (20). L'ensemble comporte également au moins un deuxième transformateur (T2) côté potentiel haute tension, ce transformateur étant doté d'une face primaire à cloisonnement symétrique, dont l'emplacement de cloisonnement (K4) est en potentiel haute tension, et d'une face secondaire, à laquelle l'appareil de mesure (1) doit être raccordé pour l'alimentation en énergie. Cet ensemble comprend en outre au moins un élément de transmission (90) symétrique diminuant le potentiel, cet élément étant doté de deux branches partielles parallèles (Z1, Z2) se trouvant entre la face secondaire du premier transformateur (T1) et la face primaire du deuxième transformateur (T2). Pour diviser la tension, chaque branche partielle comprend au moins deux éléments diviseurs de tension (C1, C2, C3, C4) avec un point nodal (K1, K2) intermédiaire, chacune d'elles devant être reliée à l'appareil de mesure (1) par l'intermédiaire des deux points nodaux (K1, K2) et d'une conduite (E1, E2) pour mesurer la tension.

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