Nexans

A power cable (10) comprises at least one cable core (11) comprising an electrical conductor (20) having two or more conductor elements (12) and an insulating system (19, 15, 16) radially surrounding the electrical conductor (20), where the insulating system comprises an inner semiconductive layer, insulation layer and outer semiconductive layer. The electrical conductor (20) comprises a plurality of transversally arranged watertight barriers (21) arranged intermittently along the longitudinal direction of the power cable (10) wherein the plurality of watertight barriers (21) have a diameter (D) and a length (L), where the diameter of the watertight barriers essentially corresponds to the diameter (d) of the conductor, and wherein the outer surface of the plurality of watertight barriers (21) is watertight linked to an extension layer extending a distance along the length of the electrical conductor. A method for manufacturing a power cable with water barrier, comprising the steps of: a) providing an electrical conductor (20) having two or more conductor elements (12), b) providing a plurality of watertight barriers arranged intermittently along the longitudinal direction of the electrical conductor, wherein the plurality of watertight barriers have a diameter and a length, where the diameter of the watertight barriers essentially corresponds to the diameter of the electrical conductor, c) link the outer surface of the plurality of watertight barriers (21) watertight to an extension layer so that the extension layer extends a distance along the length of the electrical conductor, and d) providing an insulating system (13, 15, 16) radially surrounding the electrical conductor (20), where the insulating system comprises an inner semiconductive layer, insulation layer and outer semiconductive layer.

A high voltage direct current (HVDC) power cable comprising a non-solid conductor (20), an inner semiconducting layer (19) surrounding the non-solid conductor (20), an insulating layer (15) surrounding the inner semiconducting layer (19) and an outer semiconducting layer (16) surrounding the insulation layer, wherein a water blocking composition is included in interstices of the non-solid conductor (20) wherein the water blocking composition comprises 20-95 wt-% polymer base comprising a polymer selected from polyisoprene, butyl rubber, neoprene, ethylene propylene rubber, ethylene propylene diene monomer rubber, ethylene-octene, styrene ethylene butadiene styrene, polyurethanes and silicone rubber; and 5-50 wt-% conductive filler.

The present invention relates to the technical field of subsea power cables. More specifically, the invention relates to a method of manufacturing a high voltage power cable comprising a cable core surrounded by an insulation system, wherein the cable core comprises conductor elements and a water blocking composition, wherein the method comprises the steps of stranding the conductor elements to obtain a stranded bundle of conductor elements, introducing the water blocking composition in the voids left in the stranded bundle of conductor elements, degassing of the water blocking composition, obtaining the cable core, and surrounding the insulation system coaxially around the cable core. The present invention further relates to a high voltage power cable produced by the method according to the invention and a use of the high voltage power cable.

A method of manufacturing an electric power cable comprises providing a plurality of conductor elements, stranding the conductor elements to combine the conductor elements into at least one conductor layer to form a conductor, applying a water blocking composition to the conductor elements in a stranding region during the stranding, such that interstices between the conductor elements comprise the water blocking composition, heating the conductor elements before and/or during entering the stranding region to a first temperature, and scraping off a part of the water blocking composition to adjust a layer thickness of the water blocking composition on the at least one conductor layer to a predetermined level, wherein the water blocking composition is configured to prevent water ingress within the at least one cable element.

L'invention concerne un câble (10) électrique comprenant une âme (7) conductrice et un système (9) isolant entourant ladite âme conductrice (7), et dans lequel le système isolant comprend au moins une couche (8) comprenant une matrice (11) polymère dans laquelle sont dispersées des particules (3) solides de polymère réticulé, avantageusement issu d'un recyclage.

A dynamic high-voltage submarine cable comprises at least one cable core comprising an electrical conductor and an electrically insulating layer (4) radially surrounding outside of the electrical conductor (3), and a water barrier radially surrounding outside of the cable core (2). The water barrier comprises a corrugated metal tube (10) having an inner diameter (20) larger than 90mm and a corrugation pitch (p) in a range of 4 - 12 mm, characterized in that the metal tube has a wall thickness (T) in a range of 0.1 - 1,2 mm and a corrugation depth (d) of more than 5 mm.

La présente invention concerne un câble électrique comprenant au moins un élément allongé électriquement conducteur et une couche électriquement isolante en contact direct avec l'élément allongé électriquement conducteur, où :- la couche électriquement isolante est obtenue à partir d'une composition polymère thermoplastique qui comprend au moins 50 % en masse de polypropylène, sous forme d'un homopolymère, d'un copolymère, ou en mélange et sous forme homophasique, hétérophasique ou en mélange ; et- la couche électriquement isolante comprend des bulles de gaz.

A power cable system, comprising a power cable, and a cooling device thermally coupled to the power cable, wherein the cooling device comprises an enclosure, wherein a first region of the enclosure is configured to absorb heat from one part of the power cable, wherein a second region of the enclosure is configured to release heat to another part of the power cable, another object or the environment, and wherein the cooling device has a two-phase heat transfer mechanism inside the enclosure for conducting a heat transfer between the first region and the second region.

There is provided apparatus for enabling space charge distribution measurement of a high voltage cable (110). The apparatus comprises: a compartment (140; 240; 340; 440) for holding a pulsed electro-acoustic, PEA, sensor (260; 360) in contact with the high voltage cable; and a coupling structure (130; 230; 330; 424; 529) configured to couple the compartment to the high voltage cable between a base of a termination device (120; 420) of the high voltage cable and a ground screen (150; 450) of the high voltage cable.

La présente invention concerne un procédé de fabrication en continu d'un câble électrique (1) comprenant un élément électriquement conducteur allongé (2), une couche isolante (3) entourant ledit élément électriquement conducteur allongé ; et une gaine (4) entourant ladite couche isolante , et dans lequel :- la couche isolante (3) est extrudée autour dudit élément électriquement conducteur allongé (2), à partir d'une première composition polymère thermoplastique C1 non réticulable ; et- la gaine (4) est extrudée autour de la couche isolante (3) , à partir d'une deuxième composition polymère thermoplastique C2 non réticulable, distincte de la composition C1.