Use of a gaseous medium comprising polyfluorinated oxirane compounds, as electrical insulating gas and/or extinguishing arcs in a medium voltage electrical appliance, which is e.g. gas-insulated electrical transformer or gas-insulated line

摘要

Use of a gaseous medium comprising polyfluorinated oxirane compounds (I), as electrical insulating gas and/or extinguishing arcs in a medium voltage electrical appliance, is claimed. Use of a gaseous medium comprising polyfluorinated oxirane compounds of formula (I) as electrical insulating gas and/or extinguishing arcs in a medium voltage electrical appliance, is claimed. R1-R4 : F or perfluoroalkyl, preferably perfluoromethyl or perfluoroethyl. An independent claim is included for the medium voltage electrical apparatus comprising a sealed enclosure, where the electrical components and the gaseous medium to provide electrical insulating and/or extinguishing arcs, are present in the enclosure. [Image].