Power cable with water swellable agents and elongated metal elements outside cable insulation

An electrical power cable comprising a stranded conductor formed by a plurality of wires stranded together, a semi-conductive stress control layer around said conductor, a layer of insulation around said stress control layer, a semi-conductive insulation shield around said insulation, and a metal shield which is disposed around said insulation shield and which is one of a helically wound metal tape, a plurality of metal straps and a plurality of said metal shield having surfaces extending longitudinally of said cable and being adjacent to each other, a layer of water swellable tape intermediate said metal shield and said insulation shield, and particles of a water swellable material admixed with an extrudable polymeric material and conductive particles in an amount sufficient to make the mixture semi-conductive at least at the adjacent surfaces of said metal shield.

An electrical power cable comprising a stranded conductor formed by a plurality of wires stranded together, a semi-conductive stress control layer around said conductor, a layer of insulation around said stress control layer, a semiconductive insulation shield around said insulation, and a metal shield which is disposed around said insulation shield and which is one of a helically wound metal tape, a plurality of straps and a plurality of metal wires, said metal shield having surfaces extending longitudinally of said cable and being adjacent to each other, a jacket around said metal shield, a layer of water swellable tape intermediate said metal shield and said jacket, and particles of a water swellable material at least at the adjacent surfaces of said metal shield.

An electrical power cable comprising a stranded conductor formed by a plurality of wires stranded together, a semi-conductive stress control layer around said conductor, a layer of insulation around said stress control layer, a semi-conductive insulation shield around said insulation, said shield having an outer surface of substantially constant cross-sectional radius, and a metal shield formed by a plurality of metal wires wound helically around said insulation shield in circumferentially spaced relation, a jacket around said plurality of wires, and particles of water swellable material adjacent said wires.

An electrical power cable comprising a stranded conductor formed by a plurality of wires stranded together, a semi-conductive stress control layer around said conductor, a layer of insulation around said stress control layer, a semi-conductive insulation shield around said insulation and a metal shield formed by a plurality of metal wires wound helically around said insulation shield in circumferentially spaced relation, a jacket around said plurality of wires, a layer of water swellable tape intermediate said jacket and said metal shields and particles of water swellable material adjacent said wires.

An electrical power cable comprising a stranded conductor formed by a plurality of wires stranded together, a semi-conductive stress control layer around said conductor, a layer of insulation around said stress control layer, a semi-conductive insulation shield around said insulation and a metal shield formed by a plurality of metal wires wound helically around said insulation shield in circumferentially spaced relation, a jacket of polymeric material around said plurality of wires, said wires being at least partly embedded in said jacket and particles of water swellable material adjacent said wires.

An electrical power cable comprising a stranded conductor formed by a plurality of wires stranded together, a semi-conductive stress control layer around said conductor, a layer of insulation around said stress control layer, a semi-conductive insulation shield around said insulation and a metal shield formed of a plurality of metal wires wound helically around said insulation shield in circumferentially spaced relation, a jacket around said plurality of wires, a layer of water swellable tape intermediate said jacket and said elongated elements, and particles of water swellable material adjacent said wires, said particles of water swellable material being admixed with an extrudable polymeric material and conductive particles in an amount sufficient to make the mixture semi-conductive and wherein the mixture is intermediate said wires and said insulation shield.

An electrical power cable comprising a stranded conductor formed by a plurality of wires stranded together, a semi-conductive stress control layer around said conductor, a layer of insulation around said stress control layer, a semi-conductive insulation shield around said insulation, said shield having an outer surface of substantially constant cross-sectional radius, and a metal shield formed by a plurality of metal straps wound helically around said insulation shield in circumferentially spaced relation, said straps having their edges extending longitudinally of said cable and being adjacent to each other, a jacket around said plurality of straps, and particles of water swellable material adjacent said straps.

An electrical power cable comprising a stranded conductor formed by a plurality of wires stranded together, a semi-conductive stress control layer around said conductor, a layer of insulation around said stress control layer, a semi-conductive insulation shield around said insulation and a metal shield formed by a plurality of metal straps wound helically around said insulation shield in circumferentially spaced relation, said straps having their edges extending longitudinally of said cable and being adjacent to each other, a layer of water swellable tape intermediate said jacket and said straps, and particles of a water swellable material at least at the adjacent edges of said straps.

An electrical power cable comprising a stranded conductor formed by a plurality of wires stranded together, a semi-conductive stress control layer around said conductor, a layer of insulation around said stress control layer, a semi-conductive insulation shield around said insulation and a metal shield formed by a plurality of metal straps wound helically around said insulation shield, said strap having their edges extending longitudinally of said cable and being adjacent to each other, a layer of water swellable tape intermediate said jacket and said metal shield, and particles of a water swellable material at least at the adjacent edges of said straps.

An electrical power cable comprising a stranded conductor formed by a plurality of wires stranded together, a semi-conductive stress control layer around said conductor, a layer of insulation around said stress control layer, a semi-conductive insulation shield around said insulation, said shield having an outer surface of substantially constant cross-sectional radius, a metal shield is disposed around said insulation shield and which is one of a helically wound metal tape, a plurality of metal straps and a plurality of metal wires, said metal shield having surfaces extending longitudinally of said cable and being adjacent to each other, a jacket around said metal shield, a layer of tape intermediate said jacket and said insulation shield, and particles of a water swellable material filling any otherwise empty spaces within said jacket.