A multicore cable includes a plurality of sheathed wires, and a second cover layer covering an outer periphery of the plurality of sheathed wires, wherein the sheathed wire includes a conductor, and a first cover layer covering the conductor, the first cover layer is a crosslinked fluoroelastomer or a crosslinked fluororesin, and the second cover layer is a crosslinked fluoroelastomer.

A submarine power cable is provided having stranded conductor(s) and an insulation system, each individual stranded conductor, at given intervals, being compressed across an area to form a plurality of watertight partitions along a length of the of the submarine power cable. A method provides a plurality of watertight partitions along a length of the submarine power cable. The method includes, at a given point, arranging a compression tool around an outer circumference of the stranded conductor, using the compression tool to compress the stranded conductor, releasing the compression tool from the stranded conductor, and repeating the compression at a number of different points and using the compression tool to compress the stranded conductor at each of these points, thereby forming a plurality of watertight partitions along the length of the submarine power cable.

A manufacturing of wires with optimized insulation properties, providing an insulating wire and the wire drawing process for producing it. The wire enamel has three layers: base layer (2), middle layer (3) and top layer (4), wherein these layers wrap around the conducting wire (1) in this order. The wire drawing process is carried out by a) Primary drawing; b) Final drawing and c) Enameling process carried out in line, wherein the enameling is conducted preferably with a specific number of dies for each layer. The process and composition conditions of the wire allowed to provide a triple layer wire that presents high resistance to partial discharges, high thermal class and high resistance to abrasion, thus, increasing the service lifetime of the wire in demanding motor applications when high thermal, high mechanical and high electrical resistance are required.

In an insulated wire including a conductor formed into a long shape and an insulation film formed by stacking at least one insulating layer covering a circumference of the conductor, the insulating layer includes a porous region and a resin region. The porous region is formed of a resin and multiple voids, and the resin region is formed of the resin. In the insulating layer, a boundary surface is not provided between a first boundary surface located on a radially inner side and a second boundary surface located on a radially outer side, and the porous region and the resin region are arranged in this order from the first boundary surface toward the second boundary surface.

A high-voltage device has an encapsulation housing and at least one bushing for at least one electrical conductor leading into the encapsulation housing and/or leading out of the encapsulation housing. The at least one electrical conductor is coated with an insulation layer. The insulation layer increases the dielectric strength in the high-voltage device, in particular in the region of the bushing.

A transmission cable includes a conductor and a composite layer. The composite layer is formed by having an inner surface of an outer wrap layer adhered to an outer surface of an inner wrap layer with a glue material. The composite layer wraps the conductor and an inner surface of the inner wrap layer is in contact with an outer surface of the conductor. The inner wrap layer is made of polytetrafluoroethylene with a foaming degree of 65% to 77%, and the outer wrap layer is made of polyimide. The composite layer is made by drawing cable at a rate of 0.1-0.5 m/min and taping with an overlap percentage between 32% and 37% during a wrapping process.

An insulated electrically conductive element (1) for the aerospace field, has an elongate electrically conductive element surrounded by at least two layers, said two layers being an electrically insulating layer (4) surrounding the elongate electrically conductive element (2) and a first semiconductor layer (5) surrounding said electrically insulating layer (4), at least one of the layers having at least one fluoropolymer.

An insulated electrically conductive element (1) for the aerospace field has an elongate electrically conductive element surrounded by at least two layers, said two layers being an electrically insulating layer (4) surrounding the elongate electrically conductive element (2) and a first semiconductor layer (5) surrounding said electrically insulating layer (4), at least one of the layers having at least one fluoropolymer.

Provided is a composite layer for a transmission cable, covering a conductor of the transmission cable and including an inner wrap layer and a wrap layer. The wrap layer is adhered to the inner wrap layer by a glue material. The inner wrap layer is used for reducing a dielectric constant, and the wrap layer is used for increasing a bending strength of the transmission cable.

A cable includes: a core wire; and an insulating outer layer covering the core wire; where in the core wire including an inner conductor, an inner insulating layer covering the inner conductor, and an outer insulating layer covering the inner insulating layer, the inner insulating layer being made of a material having dielectric constant and loss factor not higher than those of the material of the outer insulating layer, the outer insulating layer being made of a flame-retardant material.