MIXTURE OF HYDROFLUOROOLEFINE AND FLUOROCETONE FOR USE AS A MEDIUM FOR INSULATING AND/OR DAMPING OF ARCS AND AN ELECTRIC MEDIUM VOLTAGE DEVICE WITH GAS INSULATING THAT CONTAINS IT Russian patent published in 2017 - IPC H01H33/22 H02B13/55 H01B3/24 

FIELD: chemistry.

SUBSTANCE: proposed gaseous medium can be used in an electrical medium voltage device in which electrical insulation and/or electric arc quenching is provided by a mixture containing hydrofluoroolefine and fluoroketone, optionally together with a diluent gas.

EFFECT: high dielectric strength of the proposed mixture as electrical insulation, low toxicity and flammability, the possibility of using it at a low operating temperature provide an increase in the reliability of electrical insulation and/or electric arc extinguishing in the medium voltage electrical device at the substation.

15 cl, 1 tbl, 6 dwg