Schneider Electric Industries Sas

Schneider Electric Energy France

Areva T & D Sas

Alstom Technology Limited

General Electric Technology Gmbh

Daniel Piccoz

Romain Maladen

Yannick Kieffel

Alain Girodet

Mathieu Nesme

Floriane Decq

Patrice Grosjean

Manuel Ferreira Da Costa

Yu-Derek Liu

Patrick Chambaz

Mathieu Marquet

Didier Thomas

Claire Creon

Patrick Casartelli

Alain Quemin

Myriam Bastard

Hervé Gauthier

There is provided a method of providing an electric insulating and/or electric arc extinguishing gaseous medium within a sealed enclosure of a medium-voltage electrical device comprising electrical components, the method including enclosing the gaseous medium in the sealed enclosure, wherein the gaseous medium includes a hydrofluoroolefin comprising three carbon atoms and a fluoroketone comprising five carbon atoms. There is also provided a medium-voltage electrical device, including a sealed enclosure comprising electrical components; and a gaseous medium provided within the sealed enclosure, the gaseous medium being an electric insulating and/or electric arc extinguishing medium, wherein the gaseous medium comprises a hydrofluoroolefin comprising three carbon atoms and a fluoroketone comprising five carbon atoms.

Mixture of hydrofluoroolefin and fluoroketone for use as an insulation and/or ARC extinguishing medium and a gas insulated medium-voltage electrical device comprising same

The invention relates to the use of a mixture comprising a hydrofluoroolefin, possibly associated with a dilution gas, as a gaseous electrical insulation and/or electrical arc extinguishing medium in substation medium-voltage electrical device. It also relates to medium-voltage electrical device in which electrical insulation and/or electrical arc extinguishing is (are) performed by a gaseous medium comprising hydrofluoroolefin, possibly associated with a dilution gas.

Use of a mixture comprising a hydrofluoroolefin as a medium-voltage arc-extinguishing and/or insulating gas and medium-voltage electrical device comprising same

An electrical apparatus for a medium- to high-voltage current transport line having a gas insulation including: a sealed housing filled with an electrically insulating gas including at least one fluorinated compound such as a fluoroketone, at least one electrical component arranged inside the inner space of the housing, and a mechanism regulating an amount of the fluorinated compound inside the inner space of the housing. The regulating mechanism includes a heater, heating a liquid resulting from condensation of the fluorinated product present in the insulating gas, to cause at least a portion of the liquid to vaporize.

Electrical apparatus having a gas insulation containing a fluorinated compound

The invention relates to the use of a mixture of a hydrofluoroolefin and a hydrofluorocarbon, optionally combined with another fluorinated gas, as an electrical insulation medium and/or an electric arc extinguishing medium in a medium-voltage electrical apparatus. The invention also relates to a medium- or high-voltage electrical apparatus in which such a mixture provides electrical insulation and/or electric arc extinguishing.

Mixture of hydrofluoroolefine and hydrofluorocarbide to improve the internal ARC resistance in medium and high voltage electric apparatus

The present invention relates to switchgear for breaking a medium- or high-voltage electric current, which switchgear comprises a leaktight enclosure in which electrical components are found as well as a gaseous medium for extinguishing the electric arcs likely to occur in said enclosure, and which switchgear is characterized in that: the gaseous medium comprises at least one fluoroketone alone or in a mixture with at least one gas that does not form part of the fluoroketone family; the fluoroketone is present in the enclosure in part in the liquid state and in part in the gaseous state; and in that the enclosure further comprises means for absorbing molecular species that form after the ionization experienced by said fluoroketone during arcing. The invention also relates to a method of manufacturing said switchgear.

Switchgear for breaking a medium- or high-voltage electric current and a manufacturing method therefor

The embodiments of the switch described herein include latching and locking systems so as to retain the rod of a vacuum bottle in a determined, open or closed, position, the systems being driven and controlled by the same means that cause the movable portion of the vacuum bottle to move, or by the disconnector itself.

Latching and locking device inside a switch or a circuit breaker

This interrupter device includes a parallel branch () in which a vacuum switch chamber is connected for breaking current. The branch is inactive in normal operation, with current flowing in it only when the disconnector () has started its opening movement, by progressive transfer of the current from the main power line () to the branch (). Since the vacuum switch () is generally at rest, it no longer needs to be dimensioned to satisfy stringent electrical and dielectric requirements for normal operation.

Power line current interrupter having a vacuum switch chamber

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Lucenay, France

Daniel Piccoz