Nexans

Sébastien Delplace

Nicolas Lallouet

Mark Stemmle

Pierre Mirebeau

Erik Marzahn

Frank Schmidt

Loïc Legrand

Waldemar Pedde

Regis Lapierre

A superconducting cable system includes a superconducting cable (); a first cryogenic jacket () containing the cable (); and a superconducting device () connected to the cable (). The superconducting cable system also has a second cryogenic jacket () containing the superconducting device (); at least one first terminal () connected to the superconducting device (); and a cooling unit () connected to the at least one first terminal ().

Superconducting cable system

An electrically connecting device () includes a linking part defining an internal channel () that opens onto the exterior of the linking part. The internal channel () is able to receive two end segments of two superconducting wires () that lie parallel in the internal channel () over a segment of common length; and an aperture () in the external jacket of the linking part. The aperture () is in communication with the internal channel () in order to allow a brazing material in liquid form to be inserted into the internal channel () around the two end segments of the two superconducting wires ().

Electrically connecting device for superconducting wires

The invention specifies a termination () for a superconducting cable () which is arranged in a tubular cryostat, which serves for carrying a coolant, and has at least one electrical conductor. The termination () has an inner sheath (), in which one end of the cable () is arranged in a coolant, and an outer sheath (), wherein the sheaths () are composed of electrically insulating material and insulating material is arranged in an existing intermediate space () between the inner and the outer sheath. The inner sheath () is connected to the cryostat, and the termination () is arranged vertically in the assembly position such that a lower part (C) of the inner and the outer sheath () is connected to earth and an upper part (A) of the inner and the outer sheath () is connected to high-voltage potential in the operating state. At the respective upper end, the inner sheath () is closed off by a first bursting disc () and the outer sheath () is closed off by a second bursting disc ().

Termination for a superconductive cable

A termination unit () for a superconducting cable (), has an internal electrically insulating envelope () containing the phase conductors (A,B,C) of the cable () in a cryogenic fluid. The internal envelope () has, for each phase conductor (A,B,C), one first electrical connector (A,B,C) connected to the corresponding phase conductor (A,B,C) and protruding from the internal envelope (). The termination unit () further has an electrically conductive, grounded casing () surrounding the internal envelope () and the first electrical connectors (A,B,C), the grounded casing () comprising one bushing (A,B,C) for each one of the first electrical connectors (A,B,C), each bushing (A,B,C) being connected to one of the first electrical connectors (A,B,C) by a second electrical connector (A,B,C) and being adapted to transmit voltage and current from its associated phase conductor (A,B,C).

Termination unit for a superconducting cable

A joint is provided between two abutting cables, where the cables each have, around a central support, at least one phase layer composed of at least one layer of superconducting material and a neutral layer that are concentric and contained in a shell, filled with cryogenic fluid. The neutral layer of each cable is also stripped, at least one bridging support member is placed between the stripped neutral layers, and a layer of conducting or superconducting material, for, the electrical connection of these neutral layers, is placed on the support member.

Superconducting cable joint

A contact element () provided with an electrical connection element (A), and intended for a superconducting cable unit arranged in a refrigerant, has an electrically conductive plate intended to be borne mechanically by the unit and to be electrically connected to the cable. The plate has through slots (E,E',E&#x2033;) intended to form thermal conduction baffles.

Contact element intended for a superconducting cable unit

A method of managing thermal contraction of a superconductor cable () having a cable body surrounded by an external screen (A) made form wound metal elements and installed between its ends in an enclosure () or cryostat filled with a cryogenic liquid, where the method includes mechanically applying a locking force loading only said screen (A) at a so-called locking point (A,B) in the vicinity of the ends of the cable.

Method of managing thermal contraction of a superconductor cable and arrangement for implementing this method

An electrical bushing structure includes a central conductor () designed to have one () of its two ends connected to a superconductor element situated in an enclosure () at cryogenic temperature, and its other end () connected to an article at ambient temperature. An electrically insulating sheath () surrounds the conductor over substantially the entire length of the conductor. A metal tube () surrounds the conductor over substantially its entire length and is interposed between the insulating sheath () and the conductor (), the tube being mechanically fastened to the conductor close to one of the ends () of the conductor, referred to as its first end, and not being mechanically fastened to the conductor close to the other one of the ends of the conductor, referred to as its second end. A space between the conductor and the tube containing a gas. The tube is in electrical contact with said second end of the conductor.

Electrical feedthrough structure for superconductor element

The invention relates to a device for connecting together two abutting superconductive cables, each cable being constituted by at least a resistive conductive central support of substantially cylindrical shape, by at least one layer of superconductive material placed around the support, and by an insulating sheath surrounding said layer of superconductive material, the end of each cable being stripped to reveal the central support and said layer of superconductive material, the device being provided with an outer covering of insulating material. According to the invention, the device comprises at least one respective conductive sleeves engaged around the stripped portion of each of the cables, together with a conductive tube containing said sleeves and connected to them.

Device for connecting two superconductive cables

The invention relates to an electrical bushing serving to make a connection at ambient temperature to a superconductor element situated in an enclosure at cryogenic temperature. The electrical bushing passes successively through an enclosure at intermediate temperature between ambient temperature and cryogenic temperature, and an enclosure at ambient temperature, and it comprises a central electrical conductor surrounded by an electrically insulating sheath. According to the invention, an electrically conductive screen connected to ground potential surrounds the insulating sheath over a section that extends from the end of the bushing that is in contact with the enclosure at cryogenic temperature at least as far as the junction between the enclosure at intermediate temperature and the enclosure at ambient temperature. The invention is more particularly applicable to making a connection to a superconductor cable.

Electrical bushing for a superconductor element

A termination for connecting one end of a superconductive cable (), wherein the end of the superconductor is made up of at least one resistively-conductive central support () of substantially cylindrical shape and disposed around the support, and wherein an insulating sheath () surrounds the superconductor. The end of the cable is stripped in order to reveal the central support () and the superconductor (), and the termination has a metal sleeve () made up of two portions adjacent in succession, wherein a first portion () is engaged around the stripped portion of the central support, and a second portion () is soldered around the stripped portion of the superconductor.

Growing community of inventors

Loon-Plage, France

Sébastien Delplace