DIELECTRIC INSULATING MEDIUM Russian patent published in 2015 - IPC H01B3/56 H02B1/21 H02B1/50 

FIELD: electricity.

SUBSTANCE: invention relates to dielectric insulating medium containing hydrofluor monoether, which has, at least, three carbon atoms and has a boiling point below 55°C. The invention also relates to the use of the named hydrofluor monoether in a dielectric insulating medium for an electric device (2) for generation, distribution and/or use of electric energy; and also to the use of the dielectric insulating medium for dielectric isolation in the electric device (2) for generation, distribution and/or use of electric energy. The invention also describes the device (2) for generation, distribution and/or use of electric energy, and the named device (2) comprises the housing (4) forming the isolating space (6), and an electrically active part (8) located in the isolating space (6), and the named isolating space (6) comprises the insulating medium, and it is a dielectric insulating medium. The insulating medium according to this invention has high insulating properties, in particular high dielectric durability and at the same time - low PGP.

EFFECT: invention allows to create the insulating medium which is chemically and thermally steady to the temperatures above 140°C which is non-toxic or has low level of toxicity and which is also non-corrosive and non-explosive.

72 cl, 3 dwg