An enclosed connection system for mechanically and electrically connecting first and second cables, the cables each including an elongate electrical conductor covered by an insulation layer, includes an insulation piercing connector and an enclosure. The insulation piercing connector includes at least one electrically conductive piercing member and a clamping mechanism. The clamping mechanism is configured and operable to force the at least one piercing member through the insulation layers of the first and second cables and into electrical engagement with the conductors of the first and second cables such that the conductors of the first and second cables are electrically connected to one another through the at least one piercing member. The enclosure is configured to receive and cover the connection and to protect the insulation piercing connector.

A method of building an insulation system around an axial section of a conductor of a power cable, the method including: a) providing a power cable including a conductor and an insulation system arranged around the conductor, the insulation system including insulation system layers, including an inner semiconducting layer arranged around the conductor, an insulation layer arranged around the inner semiconducting layer, and an outer semiconducting layer arranged around the insulation layer, wherein the power cable includes an axial section between a first insulation system section and a second insulation system section of the insulation system which at least is without an outer semiconducting layer, b) winding a tape around the conductor along the axial section in a plurality of layers to form a plurality of layers of tape connecting with the first insulation system section and the second insulation system section, and c) heating the plurality of layers of tape to melt and fuse the plurality of layers of tape to form an insulation system layer between the first insulation system section and the second insulation system section, wherein the tape has a width defined by a distance between lateral edges, wherein the tape has a mid-section between its lateral edges, wherein in the mid-section the tape has a largest thickness, and wherein the thickness of the tape decreases from the mid-section towards both lateral edges.

It is aimed to provide a wiring harness, in which a part where a wire conductor is exposed from an insulation coating is covered by a waterproof portion and which can maintain the adhesiveness of the waterproof portion to the insulation coating containing a plasticizer even if being placed in a high-temperature and high-humidity environment. A wiring harness is provided with a wire including a conductor, an insulation coating covering an outer periphery of the conductor and a conductor exposed portion, in which the conductor is exposed from the insulation coating, and a waterproof portion for integrally covering surfaces of the conductor exposed portion and the insulation coating. The insulation coating contains a plasticizer. The waterproof portion is constituted as a cured body of a resin composition containing a urethane (meth)acrylate oligomer and a nitrogen-containing monomer, which is a radical polymerizable monomer containing a nitrogen atom.

A high-voltage device for receiving a high-voltage cable having a conductor designed to conduct an electrical current and a cable insulation surrounding the conductor, includes an insulation and a waveguide. The insulation includes an at least partly transparent or translucent field control unit from a siloxane polymer which is designed to at least partly surround the cable insulation of the high-voltage cable, the siloxane polymer including, in at least one portion of the field control unit, covalently bonded fluorophores and/or dielectric pigments. The waveguide is arranged such that a light signal caused by a partial discharge in the field control unit can be coupled from the field control unit into the waveguide.

While laying a subsea cable, an exposed cut off end of the cable is exposed to water prior to permanently sealing off this cable end. To prevent damage to the cable due to contact with the often salt water, due to for example oxidation, a temporarily watertight seal is to be applied to the cut off end. A method for applying this seal is provided which comprises applying a mouldable sealant to the exposed end wherein the sealant acts as a watertight barrier between the water and the cut off end of the cable. The sealant may comprise an intermediate layer between the cut off end and a watertight outer layer arranged to increase adhesion between the cut off end and the outer layer. This allows a broader range of outer layer materials to be used as the outer layer material does not need to adhere directly with the cable.

There is provided an HVDC cable accessory comprising an electric stress control layer which at one position is adapted to be connected to an HVDC cable, wherein the HVDC cable accessory is prefabricated, and the electric stress control layer comprises a thermoplastic elastomer.

A method of manufacturing a gasket for a double busbar is disclosed. The double busbar may be composed of two separate electrically insulated flat conductors. The conductors may be arranged one above the other. The double busbar may be placed in a mold cavity for molding the gasket. The mold cavity may be closed around the double busbar and filled with a sealing material. The introduced sealing material flows around the flat conductors, adhering to the flat conductors, and solidifying in the mold cavity to form a gasket molded to the double busbar.

A seal system for an oil-filled cable termination including a cable extending through each of a cable gland and a stress cone that is spaced apart from the cable gland. The seal system includes: a first oil seal layer surrounding the cable between the cable gland and the stress cone; a second oil seal layer overlapping and contacting the first oil seal layer; a first oil barrier layer overlapping and contacting an upper portion of the second oil seal layer; a second oil barrier layer overlapping and contacting a lower portion of the second oil seal layer, the second oil barrier layer spaced apart from the first oil barrier layer; and a heat shrinkable tube secured around the first and second oil barrier layers.

Provided is a wire harness in which waterproofness of an exposed conductor portion can be ensured, and even when at least one of insulated wires is exposed to a high temperature, a rubber stopper of a waterproofing terminal can be kept from coming off. An outer peripheral surface of an exposed conductor portion where partially exposed conductors of a plurality of insulated wires are joined together, and outer peripheral surfaces of coating material end portions adjacent to the exposed conductor portion, is continuously covered with a waterproofing agent. A gap between adjacent insulated wires is sealed with the waterproofing agent at the coating material end portions adjacent to the exposed conductor portion. At least one insulated wire of the plurality of insulated wires has a flow path through which gas flows, the flow path being created in gaps between strands that constitute a conductor of the insulated wire.

An assembly for use with an oil-filled cable termination includes a cable gland, a cable received in the cable gland, and a stress cone received around the cable and spaced apart from the cable gland. The cable includes a central conductor and a polymeric insulation layer surrounding the central conductor. A lug is spaced apart from the stress cone and includes a barrel portion with the central conductor of the cable received in the barrel portion. An oil barrier system including an oil barrier layer surrounds the polymeric insulation layer of the cable between the stress cone and the lug.