Alstom Technology Limited

General Electric Technology Gmbh

Chakib Fnineche

Oana Aitken

Jean-Baptiste Jourjon

Jean-Alain Rodriguez

Cyrille Reyx

Lionel Jourdan

Device for making and/or breaking a current including a pair of permanent contacts (), at least one of the contacts () being movable. At least one permanent contact () including a main portion () having a free end and an end protection portion () secured to the free end of the main portion (), designed to be in mechanical and electrical contact with the other permanent contact () only during an operation for opening or closing the pair. The end protection portion () is made of a single transition metal having a melting temperature that is strictly higher than that of the main portion () to which it is secured, or of an oxide or carbide of such a metal, or even of zinc oxide. For application in particular to high- or medium-voltage circuit breakers.

Current connection and/or cut-off device comprising permanent contacts with reduced wear

A gas-insulated substation having an enclosure filled with dielectric gas under pressure, comprising one electrical conductor () designed to be live that is of longitudinal axis (X) and placed inside the enclosure (), and two grading shields () surrounding in part the conductor (), at least one of the grading shields () comprising a hollow electrically conductive body () of longitudinal axis that is substantially coaxial with the axis of the casing (), said body () comprising an annular depression () in its outer surface and orifices () passing through said body () made in a bottom of said annular depression. Said orifices () ensure that the dielectric gas flows between an inside zone and a zone that is outside the grading shield () by convection exchange.

Gas-insulated electrical equipment comprising at least one grading shield for ensuring convection exchange

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Saint Pierre d'Allevard, France

Chakib Fnineche