Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: The invention relates to the use of a mixture comprising a hydrofluoroolefin and a fluoroketone, optionally associated with a dilution gas, as an electric insulating and/or electric arc extinguishing medium in a medium-voltage electrical device. It also relates to a medium-voltage electrical device in which electrical insulation and/or electric arc extinguishing is (are) provided by a mixture comprising a hydrofluoroolefin and a fluoroketone, optionally associated with a dilution gas.

Abstract: 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.

Abstract: The invention relates to the use of a mixture comprising decafluoro-2-methylbutan-3-one and a carrier gas or dilution gas as a medium for electrical insulation and/or for extinction of electric arcs in a medium- or high-voltage electrical device. It also relates to a medium- or high-voltage electrical device in which electrical insulation and/or extinction of electric arcs is/are implemented by a mixture comprising decafluoro-2-methylbutan-3-one and a carrier gas or dilution gas. Applications: electrical transformers, gas-insulated lines for transporting or distributing electricity, set of busbars, electrical connection/disconnection devices (circuit breakers, switches, switch-fuse sets, disconnectors, earthing switches, contactors, etc.).

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: The present invention provides the use of a composite material comprising a polymeric matrix and at least one metal fluoride filler selected from the cerium fluorides CeF3 and/or CeF4, lanthanum fluoride LaF3 and mixtures thereof, as an electric arc extinction material in electrical equipment.

Abstract: This interrupter device includes a parallel branch (4) 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 (2) has started its opening movement, by progressive transfer of the current from the main power line (1) to the branch (4). Since the vacuum switch (6) is generally at rest, it no longer needs to be dimensioned to satisfy stringent electrical and dielectric requirements for normal operation.

Abstract: The embodiments of the switch described herein include latching and locking systems (24) so as to retain the rod (13) of a vacuum bottle (10) 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 (4) itself.

Abstract: This interrupter device includes a parallel branch (4) 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 (2) has started its opening movement, by progressive transfer of the current from the main power line (1) to the branch (4). Since the vacuum switch (6) is generally at rest, it no longer needs to be dimensioned to satisfy stringent electrical and dielectric requirements for normal operation.