POWER CABLE CONTAINING THERMOPLASTIC AND ELECTRIC INSULATING LAYER WITH VOLTAGE STABILISER Russian patent published in 2015 - IPC H01B3/44 H01B17/34 

FIELD: electricity.

SUBSTANCE: invention is related to a cable for transportation and distribution of medium- and high-voltage energy. The cable (1) comprises at least one electrical conductor (2) and at least one electric insulating layer surrounding the above electrical conductor, at that this electric insulating layer (4) contains: (a) thermoplastic polymer material selected from at least one propylene copolymer (i) with at least one olefine comonomer selected from ethylene and α-olefin, not being propylene, at that the above copolymer has melting point higher or equal to 130°C and enthalpy of melting from 20 up to 90 J/g; mixture of at least one copolymer (i) with at least one ethylene copolymer (ii) with at least one α-olefin, at that the above copolymer (ii) has enthalpy of melting from 0 up to 70 J/g; mixture of at least one propylene homopolymer with at least one copolymer (i) or copolymer (ii); at that at least one of copolymer (i) and copolymer (ii) is a heterophase copolymer; (b) at least one dielectric liquid mixed thoroughly with thermoplastic polymer material, at that the above at least one dielectric liquid is aromatic dielectric liquid with the ratio of carbon aromatic atoms number towards the total number of carbon atoms is higher or equal to 0.3; (c) at least one voltage stabiliser selected from substituted bensophenones and hindered amines.

EFFECT: invention improves breakdown strength of the cable dielectric.

20 cl, 2 tbl, 1 dwg