An insulated electric wire includes a conductor comprising twisted elemental wires and an insulation covering. The insulated electric wire includes an exposed portion in which the insulation covering is removed from the outer surface of the conductor, and a covered portion in which the insulation covering covers the outer surface of the conductor. The exposed portion and the covered portion are adjacent with each other along a longitudinal axis of the insulated electric wire. A density of the conductive material per unit length is higher in the exposed portion than in the covered portion. The elemental wires are twisted in both the exposed portion and the covered portion including an area that is positioned away from the exposed portion by at least a distance corresponding to a length of the exposed portion. Gaps between the elemental wires of the exposed portion are filled with a sealant.

A conductive wire, a conductive coil, and a conductive device, wherein in the conductive wire, an aluminum oxide-coated nano-carbon fiber is added to a first paint layer, and a silver-coated nano-carbon fiber is added to a second paint layer. By means of such an arrangement, the coefficient of thermal conductivity of the first paint layer and the second paint layer reaches 2 to 10 W/(m.Math.K), and therefore, the thermal conduction performance of the conductive wire can be remarkably improved, and the thermal conduction wire has an advantage of a good thermal conduction effect, with timely heat dissipation.

In a method making a flexible electrical conductor, a mask layer (216) is applied to a substrate (210). A portion of the mask layer (216) is removed to expose the substrate (210) in an exposed shape (220) corresponding to the conductor. A liquid phase conductor (232) is applied to the portion of the substrate (210). The mask layer (216) is dissolved with a solvent (238) to leave a shaped liquid phase conductor (234) corresponding to the exposed shape on the substrate (210). A primary elastomer layer (240) is applied onto the substrate (210) and the shaped liquid phase conductor (234). The primary elastomer layer (240) and the shaped liquid phase conductor (234) are removed from the substrate (210). A secondary elastomer layer (242) is applied to the shaped liquid phase conductor (234) and the primary elastomer layer (240) to seal the shaped liquid phase conductor (234) therein.

A high voltage DC power cable designed for voltages of 320 kV or higher, including: a multi-wire conductor, an inner semiconducting layer arranged around the multi-wire conductor, the inner semiconducting layer forming a screen layer for the multi-wire conductor, a solid insulation system arranged around the inner semiconducting layer, and a water-blocking compound configured to restrict water migration into the high voltage DC power cable.

An insulated electric wire includes a conductor comprising twisted elemental wires and an insulation covering. The insulated electric wire includes an exposed portion in which the insulation covering is removed from the outer surface of the conductor, and a covered portion in which the insulation covering covers the outer surface of the conductor. The exposed portion and the covered portion are adjacent with each other along a longitudinal axis of the insulated electric wire. A density of the conductive material per unit length is higher in the exposed portion than in the covered portion. The elemental wires are twisted in both the exposed portion and the covered portion including an area that is positioned away from the exposed portion by at least a distance corresponding to a length of the exposed portion. Gaps between the elemental wires of the exposed portion are filled with a sealant.

Provided is an insulated electric wire with a conductor of a plurality of twisted elemental wires made of a conductive material, and an insulation covering. The wire comprises an exposed portion in which the insulation covering is removed, and a covered portion in which the insulation covering covers the conductor. The exposed portion and the covered portion are adjacent with each other along a longitudinal axis of the wire. The covered portion comprises an adjacent area located adjacent to the exposed portion, and a remote area located adjacent to the adjacent area and apart from the exposed portion. A density of the conductive material per unit length is higher in the exposed portion than in the remote area. The elemental wires are twisted in both the exposed portion and the remote area. Gaps between the elemental wires of the exposed portion are filled with a sealant.

Provided are a micro-nano wire manufacturing device and a micro-nano structure. The micro-nano wire manufacturing device includes a liquid-phase nanomaterial storage device and a micro-nano wire applying mechanism. The liquid-phase nanomaterial storage device is provided with a liquid outlet. The micro-nano wire applying mechanism is provided in one-to-one correspondence with the liquid outlet. The micro-nano wire applying mechanism includes at least two flexible wires. The roots of the flexible wires are secured to the liquid-phase nanomaterial storage device. One ends of the two flexible wires hang down to a substrate and abut against each other. The range of the angle between the projections of the two flexible wires on the substrate is 1°to 5°.

A method of manufacturing a cable seal is provided, the method including the steps of providing a cable having a protective outer jacket of a non-PVC material; preparation of the protective outer jacket of the cable such as to promote adhesion with a sealant; and overmolding the outer jacket with a sealant. As a result, a sealing interface is formed between the jacket and the sealant.

An electromechanical cable that has fluid/gas migration protection is provided as well as a method for manufacturing a fluid/gas migration protected electromechanical cable. The cable can include a core having at least one conductor or fiber optic, a first jacket layer surrounding the core, a sealing layer surrounding the first jacket layer, and a first armor layer surrounding the sealing layer. In one embodiment, the sealing layer can be applied to the cable in a viscous material state and may be a two-part epoxy or synthetic filler material to form a seal between one or more spaces between the armor wire layer and the first jacket layer. In one embodiment, the sealing layer can be applied to the cable in a solid material state and may be a thermoplastic elastomer or silicone-based material or a combination of both.

A method for rejuvenating a strand-blocked cable having a conductor comprised of a plurality of conductor strands with interstitial volume therebetween blocked by a PIB based mastic, the conductor being surrounded by a polymeric cable insulation. The method comprising installing injection adapters that seal the cable ends of the cable and are usable to inject fluid into the interstitial volume between the conductor strands of the cable; elastically expanding the polymeric cable insulation through the application of pressure to the interstitial volume between the conductor strands of the cable; and injecting at least one injection fluid in which the PIB based mastic is at least partially soluble into the interstitial volume between the conductor strands of the cable. To facilitate elastic deformation of the polymeric cable insulation, the cable may be heated to and maintained at a temperature of T1 above ambient during the injection.