Nexans

Claus-Friedrich Theune

Arnaud Allais

Michael Meyer

Rainer Soika

Klaus Porcher

Dirk Isfort

Daniel Guery

Michel Martin

Sophie Barbeau

Christian-Eric Bruzek

Corinne Poulard

A method for producing a tube from metal is stated, by use of which method a metal strip by means of a drawing-off installation is moved in the longitudinal direction of said metal strip and is guided through a forming station in which said metal strip is formed to a slot tube having a slot running the in the longitudinal direction. The two edges of the metal strip abut to one another at the slot. Said two ends for producing a fully closed tube are welded to one another by use of a welding installation that is equipped with a laser. The slot tube after leaving the forming station is initially moved into the region of the laser and is then stopped. Thereafter, the regions of the edges of the slot tube that are to be welded to one another are pre-treated by the laser. Thereafter, the power of the laser is set to the welding power thereof that corresponds to the welding temperature, and by switching on the drawing-off installation the slot tube is simultaneously moved in the longitudinal direction of the latter.

Method for producing a tube from metal

An electric cable () includes at least one composite reinforcement element () including one or more reinforcement element(s) at least partially embedded in an organic matrix. A coating () surrounds the composite reinforcing element(s) (). The coating () is sealed all around the composite reinforcing element(s) (). At least one conducting element () surrounds the coating (), where the thickness of the sealed coating () does not exceed 3000 &#x3bc;m.

High voltage electric transmission cable

A conductor for transmitting electrical power having a cylindrical core () clad with a strip of metallic material (), possibly comprising a superconductor, placed, in the shape of a tube, longitudinally around said core (I), its longitudinal edges being welded to each other along a weld seam (). The core () has a slot () placed under said weld seam ().

Conductor for transmitting electrical power

A method is provided for producing a superconductive electrical conductor, in which a layer of an yttrium-barium-copper oxide (YBCO) is applied as a superconductive material onto a textured metal substrate, and is subjected to a heat treatment. In order to produce a wire-shaped conductor, a textured metal substrate, provided as a strip (), is initially shaped in its longitudinal direction around an elongate metal support () with a circular cross section to form a slotted tube () having edges extending in the longitudinal direction and adjoining one another at a slot (). The slotted tube () is next closed by welding the slot () shut, and the closed tube () is then contracted by pulling until it bears on the support (). The layer () of superconductive YBCO material is thereupon applied all around, and the heat treatment is finally carried out.

Method for producing a superconductive electrical conductor

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Wennigsen, Germany

Claus-Friedrich Theune