Alstom

Areva T&d Sa

Lionel Lucot

Jean-Pierre Dupraz

Bernard Regnier

Olfa Chetay

Olivier Chuniaud

Didier Taponat

The current transformer comprises at least two partial circuits (CB) each comprising a Rogowski type winding (C), each of said the partial circuits being made in the form of an angular portion of a complete circuit (CB) which surrounds at least one primary conductor (A,B,C) of the transformer over 360&#xb0;. The winding (C) of each partial circuit (CB) is constituted by a go winding (C) and by a return winding (C) which extend over the angular extent (&#x3b8;) of the partial circuit (CB). For each partial circuit (CB), the go and return windings are electrically connected in series, both having turns wound in the same direction so as to form a single winding (C) which presents a pair of adjacent electrical terminations (T, T) connected to an acquisition system (').

Current transformer with rogowski type windings, comprising an association of partial circuits forming a complete circuit

A method and system of non-intrusively monitoring the proportion of a component in a gaseous mixture having at least two components and contained in an electrical switchgear enclosure includes measuring the pressure, the temperature, and the density of the gas mixture by using sensors mounted on said enclosure, and in determining said proportion by processing the measured values in a data-processing unit.

Method and system of non-intrusively monitoring the mixture ratio of a gas mixture having at least two components

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Fleurieux, France

Lionel Lucot