Abstract: The present invention concerns a 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 and heptafluoroisopropyl (trifluoromethyl)ketone in a mixture with a dilution gas.

Abstract: A compression sealing gasket having a main body of general planar extension, or extending in a plane, including an inner side and an outer side, and end faces, which delimit the gasket along an axis perpendicular to the plane, and connect the inner side and the outer side, made of an elastomer material, the main body having a first extension, along the axis, at least one of the inner side and the outer side being provided with a lip which has a second extension, along the axis perpendicular to the plane, less than the first extension.

Abstract: A compression sealing gasket including an annular main body compression sealing gasket having an annular main body made of an elastomer material and having an annular radially outer face and an annular radially inner face parallel and coaxial to each other, wherein at least one of the radially outer face and the radially inner face includes at least one first thin layer, made of metal or soft metal or PTFE, and having a thickness of between 1 nm and 1 mm.

Abstract: A disconnector for a GIS, in a gas chamber and along an axis, including a pair of permanent contacts, both being fixed, an electrically conducting tube movable along the axis, the tube moving from a position in which both permanent contacts are in electrical contact to a position in which both main contacts are electrically separated, a pair of arcing contacts, one fixed and the other one movable together with the electrically conducting tube, a pair of rear contacts, one of them being in electrical contact with the movable arcing contact, means for moving the electrically conducting tube and the movable arcing contact along the axis, thereby opening the disconnector and for separating the rear contacts from each other before the arcing contacts separate.

Abstract: A compression sealing gasket having a main body of general planar extension, or extending in a plane, including an inner side and an outer side, and end faces, which delimit the gasket along an axis perpendicular to the plane, and connect the inner side and the outer side, made of an elastomer material, the main body having a first extension, along the axis, at least one of the inner side and the outer side being provided with a lip which has a second extension, along the axis perpendicular to the plane, less than the first extension.

Abstract: The present application concerns a 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 the enclosure, the gas mixture including heptafluoroisobutyronitrile, carbon dioxide, and a high content of oxygen.

Abstract: A medium or high voltage electrical device and method of maintaining the composition of an insulating gas mixture in a medium or high voltage electrical device, where the device comprises a sealed chamber, said sealed chamber comprising electrical components; a gas mixture ensuring electrical insulation and/or extinguishing of electrical arcs produced in this chamber, wherein the gas mixture comprises at least one insulating gas and at least one dilution gas; and a receptacle, said receptacle comprising an opening, at least one wall, wherein at least one wall is a heatable wall, and wherein said receptacle is positioned to receive liquefied gas; the device further comprising a heating element for heating the heatable receptacle wall; and a dielectrically and thermally insulating layer located between the heatable receptacle wall and the chamber.

Abstract: The present application concerns a 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 the enclosure, the gas mixture including heptafluoroisobutyronitrile, carbon dioxide, and a high content of oxygen

Abstract: A medium or high voltage electrical device and method of maintaining the composition of an insulating gas mixture in a medium or high voltage electrical device, where the device comprises a sealed chamber, said sealed chamber comprising electrical components; a gas mixture ensuring electrical insulation and/or extinguishing of electrical arcs produced in this chamber, wherein the gas mixture comprises at least one insulating gas and at least one dilution gas; and a receptacle, said receptacle comprising an opening, at least one wall, wherein at least one wall is a heatable wall, and wherein said receptacle is positioned to receive liquefied gas; the device further comprising a heating element for heating the heatable receptacle wall; and a dielectrically and thermally insulating layer located between the heatable receptacle wall and the chamber.

Abstract: The invention relates to an electric arc-blast nozzle for a circuit breaker comprising a middle portion forming a throat defining internally an axial passage for interrupting an electric arc, and two end portions extending on either side of the middle portion and being designed to receive respective arcing contacts and that are movable axially relative to each other. The middle portion and the two end portions are made of a same dielectric material obtained from a composition consisting of a fluorocarbon polymer matrix and of at least one oxide, the oxide(s) being present in a proportion by weight lying in the range 11% to 50%, relative to the total weight of the composition. The invention also relates to a circuit breaker including such a nozzle.

Abstract: The invention relates to an electric arc-blast nozzle for a circuit breaker comprising a middle portion forming a throat defining internally an axial passage for interrupting an electric arc, and two end portions extending on either side of the middle portion and being designed to receive respective arcing contacts and that are movable axially relative to each other. The middle portion and the two end portions are made of a same dielectric material obtained from a composition consisting of a fluorocarbon polymer matrix and of at least one oxide, the oxide(s) being present in a proportion by weight lying in the range 11% to 50%, relative to the total weight of the composition. The invention also relates to a circuit breaker including such a nozzle.