A method for manufacturing a carbon nanotube fiber, the method comprising: preparing a core materialextending in a predetermined direction; preparing a carbon nanotube array comprising a plurality of carbon nanotubes aligned on a substrate and oriented vertically to the substrate; preparing a carbon nanotube untwisted yarn comprising the plurality of continuously connected carbon nanotubes by drawing the carbon nanotube untwisted yarn from the carbon nanotube array; and winding the carbon nanotube untwisted yarn around the core material.

An auxiliary wire, a flat cable and a round cable are provided. Each of the flat cable and the round cable is provided with the auxiliary wire with the loose jacket protective layer.

The present invention discloses electrical cables containing a cable core and a plurality of conductive elements surrounding the cable core. The cable core contains at least one composite core, and each composite core contains a rod which contains a plurality of unidirectionally aligned fiber rovings embedded within a thermoplastic polymer matrix, and surrounded by a capping layer.

A vibration resistant cable may be provided. The vibration resistant cable may comprise a first conductor and a second conductor. The first conductor and the second conductor may each have a diameter d. The second conductor may be twisted around the first conductor at a lay length determined as a function of the diameter d and may be configured to reduce relative movement of the first conductor and the second conductor that would result in bags in the vibration resistant cable.

An energy kite may be coupled to a tether and ground station via an electro-mechanical bridle. The energy kite may generate a significant amount of lift during power generation and may need to transfer this load to a tether that is anchored at the ground. Transferring the load at a single point would place a substantial bending moment on the energy kite. To mitigate this bending moment, the load may be divided between multiple locations with a bridle system. The bridle system may have a plurality of electrical conductors to conduct electrical power and signals.

The present invention relates to electrical conductors for electrical transmission and distribution with pre-stress conditioning of the strength member so that the conductive materials of aluminum, aluminum alloys, copper, copper alloys, or copper micro-alloys are mostly tension free or under compressive stress in the conductor, while the strength member is under tensile stress prior to conductor stringing, resulting in a lower thermal knee point in the conductor.

The present invention discloses electrical cables containing a cable core and a plurality of conductive elements surrounding the cable core. The cable core contains at least one composite core, and each composite core contains a rod which contains a plurality of unidirectionally aligned fiber rovings embedded within a thermoplastic polymer matrix, and surrounded by a capping layer.

Vibration resistant cables containing a first conductor and a second conductor, each having a diameter d, are disclosed. The second conductor is twisted around the first conductor at a lay length between 3 feet and 6 feet to eliminate bagging of the vibration resistant cable during installation.

A composite core for use in electrical cables, such as high voltage transmission cables is provided. The composite core contains at least one rod that includes a continuous fiber component surrounded by a capping layer. The continuous fiber component is formed from a plurality of unidirectionally aligned fiber rovings embedded within a thermoplastic polymer matrix. The present inventors have discovered that the degree to which the rovings are impregnated with the thermoplastic polymer matrix can be significantly improved through selective control over the impregnation process, and also through control over the degree of compression imparted to the rovings during formation and shaping of the rod, as well as the calibration of the final rod geometry. Such a well impregnated rod has a very small void fraction, which leads to excellent strength properties. Notably, the desired strength properties may be achieved without the need for different fiber types in the rod.

The invention relates to an electric power transmission cable comprising at least one central composite core (1A, 1B) formed of fibers embedded in a resin and around which metal conductive wires (2, 3) are positioned, said core (1) being coated with a coating layer (4) consisting of carbon nanotubes embedded in a resin.

According to the invention, said coating layer consists of only 4% to 8% by weight of carbon nanotubes embedded in said resin.