A termination for electrical cables may include: an outer insulation tubular body having a longitudinal axis; a conductive rod within the body; an elastomeric sleeve within the body and extending about an end portion of the rod; a connecting device within the sleeve, wherein the device is mechanically and electrically connected to the rod and is configured to mechanically and electrically connect to an electrical cable; a conductive tubular element within the body, configured to electrically connect to ground; a semi-conductive element within the tubular element and partially extending inside the sleeve on an opposite side to the rod with respect to the device; and at least one elastic conductive element radially interposed between, and in contact with, the tubular element and semi-conductive element, the at least one elastic conductive element configured to exert elastic force onto the semi-conductive element along at least one radial direction toward the axis.

A termination for electrical cables may include: an outer insulation tubular body having a longitudinal axis; a conductive rod within the body; an elastomeric sleeve within the body and extending about an end portion of the rod; a connecting device within the sleeve, wherein the device is mechanically and electrically connected to the rod and is configured to mechanically and electrically connect to an electrical cable; a conductive tubular element within the body, configured to electrically connect to ground; a semi-conductive element within the tubular element and partially extending inside the sleeve on an opposite side to the rod with respect to the device; and at least one elastic conductive element radially interposed between, and in contact with, the tubular element and semi-conductive element, the at least one elastic conductive element configured to exert elastic force onto the semi-conductive element along at least one radial direction toward the axis.

The present invention relates to a device comprising at least one electrical cable (10a, 10b, and 10c) for transporting DC current, said electrical cable comprising an elongate electrical conductor (11a, 11b, and 11c) surrounded by at least one first semiconducting layer (12c), an electrically insulating layer (13a, 13b and 13c) surrounding the first semiconducting layer and a second semiconducting layer (14a, 14b and 14c) surrounding the electrically insulating layer, characterized in that the electrical cable (10a, 10b, and 10c) furthermore comprises a space charge trapping layer (15a, 15b, and 15c) obtained on the basis of a polymeric composition comprising at least one organic polymer and at least one linear filler, the space charge trapping layer (15a, 15b, and 15c) replacing at least in part the second semiconducting layer (14a, 14b, and 14c) of the electrical cable, so that the space charge trapping layer is in physical contact with the electrically insulating layer (13a, 13b, and 13c) of the electrical cable.

The present invention relates to a device comprising at least one electrical cable (10a, 10b, and 10c) for transporting DC current, said electrical cable comprising an elongate electrical conductor (11a, 11b, and 11c) surrounded by at least one first semiconducting layer (12c), an electrically insulating layer (13a, 13b and 13c) surrounding the first semiconducting layer and a second semiconducting layer (14a, 14b and 14c) surrounding the electrically insulating layer, characterized in that the electrical cable (10a, 10b, and 10c) furthermore comprises a space charge trapping layer (15a, 15b, and 15c) obtained on the basis of a polymeric composition comprising at least one organic polymer and at least one linear filler, the space charge trapping layer (15a, 15b, and 15c) replacing at least in part the second semiconducting layer (14a, 14b, and 14c) of the electrical cable, so that the space charge trapping layer is in physical contact with the electrically insulating layer (13a, 13b, and 13c) of the electrical cable.

The present invention provides a millable silicone rubber composition characterized by comprising: (A) two raw alkenylated organopolysiloxane rubbers (A-1) and (A-2), i.e., a raw organopolysiloxane rubber including a molecular chain which is represented by a specific empirical formula and in which each of both terminals has been blocked with a trialkenylsiloxy group and a raw organopolysiloxane rubber including a molecular chain which is represented by a specific empirical formula and in which each of both terminals has been blocked with a monoalkenyldialkylsiloxy group; (B) an organohydrogenpolysiloxane having at least two silicon-atom-bonded hydrogen atoms in the molecule; (C) carbon black having an average primary-particle diameter of 100-350 nm; (D) reinforcing fumed silica having a specific surface area, as determined by the BET adsorption method, of 50 m.sup.2/g or greater; and (E) a platinum-group metal catalyst. This millable silicone rubber composition has an excellent electric-field relaxation ability, a high elongation at break, a reduced tension set, and high dielectric or insulating properties.

A power cable termination system including: a power cable having a power cable conductor and a power cable insulation system configured to electrically insulate the power cable conductor, a termination cable having a termination cable conductor and a termination cable insulation system configured to electrically insulate the termination cable insulation system, wherein the termination cable is at least one order of magnitude shorter than the power cable, wherein the termination cable conductor has an electrical resistance which is lower than the electrical resistance of the power cable conductor and/or the termination cable insulation system has a higher insulation resistance per unit length than the power cable insulation system, a joint configured to join the power cable and the termination cable, and a cable termination device configured to terminate the termination cable.

A field grading member includes an insulating body extending along a regulation axis and a conductive body. The conductive body is encapsulated within the insulating body and defines a conductive network therein to regulate an electric field within an underlying insulator from current flowing through a conductor along the regulation axis. Cables and methods of regulating electric field within cables are also described.

A field grading member includes an insulating body extending along a regulation axis and a conductive body. The conductive body is encapsulated within the insulating body and defines a conductive network therein to regulate an electric field within an underlying insulator from current flowing through a conductor along the regulation axis. Cables and methods of regulating electric field within cables are also described.

An HVDC power cable joint assembly for jointing more than two power cables, including: a connection body including: a multi-branch conductor having at least two branches and a stem, a multi-branch conductor insulation system including: a connection body inner semiconducting layer arranged radially outside of the multi-branch conductor, a connection body insulation layer arranged radially outside the connection body inner semiconducting layer, a connection body outer semiconducting layer arranged radially outside the connection body insulation layer, N power cables, where N is the number of branches plus one, each power cable having a conductor, and a power cable insulation system surrounding the conductor, N power cable joints, each connecting a branch or the stem to a respective power cable, wherein each power cable joint includes: a conductor joint between one of the branches, or the stem, and a conductor of one of the power cables, a joint insulation system arranged around the conductor joint, the joint insulation system including a deflector layer, a field grading layer, a joint insulation layer and a joint insulation system outer semiconducting layer, and an outer cover housing the joint insulation system, and an external metal casing accommodating the connection body.

Provided is an ultra-high-voltage direct-current (DC) power cable system. Specifically, the present disclosure relates to an ultra-high-voltage DC power cable system capable of simultaneously preventing or minimizing electric field distortion, a reduction of DC dielectric strength, and a reduction of impulse breakdown strength due to the accumulation of space charges in an insulating layer of a cable and an insulating material of an intermediate connection part.