POWER CABLE WITH STABLE INSULANCE Russian patent published in 2015 - IPC H01B7/28 H01B3/22 

FIELD: electrical engineering.

SUBSTANCE: cable comprises conductor and insulating ply to surround the latter. Said insulating ply comprises elements that follow. (a) Thermoplastic polymer selected from propylene copolymer (i) with olefin comonomer selected from ethylene and α-olefin other than propylene. Said copolymer features fusion point higher than or equal to 130°C, and enthalpy of melting from 20 J/g to 90 J/g; mix of copolymer (i) with copolymer (ii) of ethylene with α-olefin. Second copolymer (ii) features melting enthalpy from 0 J/kg to 70 J/kg; mix of propylene homopolymer with copolymer (i) or copolymer (ii). One of copolymer (i) and (ii) represents a heterophase copolymer. (b) Liquid dielectric thoroughly mixed with thermoplastic polymer. (c) At least one additive to impart resistance to formation of aqueous dendrites selected from ethoxylated fat acids and their amide derivatives.

EFFECT: longer stability of dielectric.

15 cl, 4 tbl, 1 dwg