Alstom Technology Limited

Schneider Electric Industries Sas

Gec Alsthom T&d Sa

Areva T&d Sa

Schneider Electric Energy France

Supergrid Institute Sas

General Electric Technology Gmbh

Supergrid Institute

Areva T & D Sas

Alain Girodet

Yannick Kieffel

Daniel Piccoz

Romain Maladen

Jacques Porte

Andre Cimala

Marc Vittoz

Christophe Creusot

Alberto Bertinato

Christian Lindner

François Biquez

Paul Vinson

Gwenael Marquezin

Andre Neveu

André Cimala

Florent Morel

Mehdi Lebiad

Igor Deprez

Olivier Le Grand

Thanh Vu Cong

Nihal El Fahim

Michel Mermet Guyennet

A medium- or high-voltage switch (), comprising a high-vacuum enclosure (); first and second contacts () that are mounted to be movable in translation relative to each other inside the enclosure () between an open position in which the first and second contacts () are spaced apart; and a closed position in which the first and second contacts () are in electrical contact. The switch () further comprises a conductor () arranged inside the enclosure () in such a manner that there exists a pressure threshold inside the enclosure () from which partial discharges are generated by said conductor, at least when the first and second contacts () are in the closed position and the medium or high voltage is applied to the switch (). The invention further relates to a switch assembly and to a method of testing such a switch.

Vacuum-insulated switch enabling testing of the vacuum, switch assembly, and testing method

The present invention relates to medium- or high-voltage equipment having low environmental impact, including a leaktight enclosure in which there are located electrical components covered with a solid dielectric layer of varying thickness and a gaseous medium for providing electrical insulation and/or for extinguishing electric arcs that are likely to occur in said enclosure, and that comprises heptafluoroisobutyronitrile in a mixture with a dilution gas.

Medium- or high-voltage electrical appliance having a low environmental impact and hybrid insulation

The present invention provides medium- or high-voltage equipment including a leaktight enclosure in which there are located electrical components and a gas mixture for providing electrical insulation and/or for extinguishing electric arcs that are likely to occur in said enclosure, the gas mixture comprising heptafluoroisobutyronitrile, carbon dioxide, and oxygen in small quantities. Electrical components covered in a solid dielectric layer of varying thickness are located inside said leaktight enclosure of the equipment of the invention.

Gas-insulated medium or high-voltage electrical apparatus including carbon dioxide, oxygen, and heptafluoro-isobutyronitrile

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

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

A switch unit comprising a circuit breaker and a disconnector disposed in one plane and fixed to a metal casing. Common drive means comprise:

Switch unit having a circuit breaker and a disconnector with common drive means

A device for the actuation of the movable contacts of a hybrid circuit breaker allows the following time diagram to be implemented: command the opening of the interrupting chamber, offset the opening of the vacuum switch so as to allow the interrupting chamber contacts to separate at a minimum speed and in a way that is synchronous with the separation of the vacuum switch contacts, close the vacuum switch while keeping the interrupting chamber in the open position. Moreover, closing the interrupting chamber does not act upon the contacts of the vacuum switch.

Drive kinematics in a hybrid circuit-breaker

A compressed gas interrupter having a first contact piece having a hollow wear contact into which, during closure, there is inserted a rod-shaped wear contact provided on a second contact piece, an insulating nozzle on the same axis as the two contact pieces and fixed to the first contact piece with the throat of the nozzle having the wear contact of the second contact piece passing therethrough on closure, the nozzle connecting a gas compression chamber to an exhaust chamber, the wear contact of the second contact piece being movable along an axis and being displaced in the opposite direction to the wear contact of the first contact piece by a rack mechanism organized to transmit movement in opposite directions from the first contact piece to the second contact piece. The rack mechanism is disposed upstream from the throat of the nozzle so as to be situated off the path of the hot gases leaving the nozzle on interruption.

Compressed gas interrupter with a rack mechanism

The present invention relates to a high-voltage circuit-breaker including a casing that is filled with a dielectric gas and that contains a first arcing contact and a second arcing contact, which arcing contacts are mounted to move in opposite directions from an open position to a closed position and vice versa, the first contact being secured by means of a ring to a tube mounted to slide in a support portion electrically connected to a terminal. Said ring is made of an insulating material, the first contact is extended by a rod that is in alignment with the contact, which rod is disposed on the side of the first contact that is further from the second contact, and is connected to a resistance, and said rod carries a switching member organized to connect said rod directly to said support portion during closure.

High-voltage circuit-breaker that inserts a resistance on closure

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Chassieu, France

Alain Girodet