Electricity meter

G - Physics – 01 – R

Patent

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Details

G01R 22/00 (2006.01) G01R 21/133 (2006.01)

Patent

CA 2231053

In order to improve signal processing in an electricity meter (E1, E2, E3, E4) with differentiating input transformers (W1, W2, W3, Wi), especially current transformers, an analog filter, especially a low-pass filter, is fitted downstream of the input transformers. This limits voltage peaks for the downstream electronics. The alterations in the measured signals caused by the filters are compensated by a digital filter during subsequent signal processing.

L'invention concerne un compteur électrique (E1, E2, E3, E4) comportant plusieurs transformateurs d'entrée (W1, W2, W3, Wi), notamment des transformateurs d'intensité. Afin de parvenir à un meilleur traitement des signaux, il est prévu d'intercaler un filtre analogique, notamment un filtre passe-bas à la suite de chaque transformateur d'entrée (W1, W2, W3, Wi), ce qui permet de limiter les pointes de tension pour l'ensemble des éléments électroniques situés en aval. Les déformations dues aux filtres, qui interviennent au niveau des signaux mesurés, sont compensées par un filtre numérique au cours d'un traitement numérique ultérieur des signaux.

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