APPLICATION OF A MIXTURE CONTAINING HYDROFLUOROPHOLOLEFIN, AS AN ARCTIC AND / OR INSULATING GAS FOR AVERAGE VOLTAGE AND CONTAINING ITS ELECTRIC MEDIUM VOLTAGE DEVICE

摘要

1. The use of a mixture containing hydrofluoroolefin with three carbon atoms, wherein said mixture has a lower global warming potential (GWP) than the global warming potential of hydrofluoroolefin, as a gaseous medium for electrical isolation and / or extinction of an electric arc in an electric medium voltage substation device wherein the hydrofluoroolefin is present in the mixture in a molar percentage (M) of at least 95% of the molar percentage M, defined by the formula M = (P / P) × 100, in which P is the pressure mix at 20 ° C in an electric device, and P is the pressure that at 20 ° C is equivalent to the saturated vapor pressure (SVP) of hydrofluoroolefin at the minimum operating temperature (T) of the electric device. 2. The use of the mixture according to claim 1, wherein the hydrofluoroolefin is trans-1,3,3,3-tetrafluoro-1-propene (HFO-1234ze). 3. The use of the mixture according to claim 1, wherein the hydrofluoroolefin is 2,3,3,3-tetrafluoro-1-propene (HFO-1234yf). The use according to any one of paragraphs. 1-3, and the mixture also contains dilution gas. 5. The use of claim 4, wherein the dilution gas is air, nitrogen, oxygen, carbon dioxide, or a mixture thereof. The use according to claim 1, wherein the molar percentage of hydrofluoroolefin (M) is from 99 to 110% of the molar percentage of M.7. The use according to any one of paragraphs. 1-3, in which the minimum temperature (T) is -50, -45, -40, -30, -25, -20, -15, -10 ° C, -5 or 0 ° C. 8. A medium voltage electrical device comprising a sealed enclosure in which electrical components are located in conjunction with a gaseous medium providing electrical isolation and / or extinction of an electric arc in this enclosure, characterized in that