Nexans

Pierre Mirebeau

Nicolas Lallouet

Hakim Janah

Frank Schmidt

Sébastien Delplace

Jean-Maxime Saugrain

Josef Cardinaels

Francois Gahungu

Jerome Matallana

Klaus Schippl

Arnaud Allais

Christian Frohne

Abdellatif Ait Amar

Bernard Aladenize

Patrice Tran

Pascal Streit

Jean-Bernard Gaubert

Laurent Moreau

Regis Lapierre

Martine Duvivier

Francois Ganhungu

Quentin Eyssautier

Daniel Acroute

Robert Gadessaud

Raphael Guffond

Pierre Kayoun

Jérôme Matallana

Jean-Francois Brame

Jean-François Brame

A high-voltage cable sealing end () has a primary volume () and a secondary volume () fluidically connected thereto, which are filled with an insulating fluid. The primary volume () and the secondary volume () are sealed with respect to the atmosphere surrounding the high-voltage cable sealing end (). The secondary volume () can be disconnected from the primary volume () via a separable connection () which can be cut off in a fluid-tight manner. A drying agent, which draws moisture out of the insulating fluid, is introduced into the secondary volume ().

Sealing end for high-voltage cables

This power cable junction () has an end part of a power cable which has an electrically insulating material (). The junction () has a predetermined region containing a module for measuring the space charge of the insulating material ().

Cable junction with integrated space charge detector

The invention relates to a high-voltage dry apparatus having a semiconductor layer () covered by a metal screen (), this screen () being eliminated so as to expose this semiconductor layer () over a length, this cable being connected to an element of equipment having an outer envelope () mechanically connected to said screen. According to the invention, an electronic monitoring arrangement () is contained within said envelope (), this electronic arrangement () being electrically connected to an electrical power supply arrangement () surrounding said semiconductor layer () and to the metal screen () of said cable on either side of said length of the exposed semiconductor layer.

High-voltage dry apparatus provided with a continuous monitoring device

An electricity transmission cable with mass-impregnated paper insulation has around at least one conductor (), an impregnated paper layer () and a metal layer () adjacent to the impregnated paper layer, this metal layer () consisting of copper or aluminum. The cable has, directly around said metal layer (), an insulating material layer () and, directly around the insulating material layer (), a transverse reinforcement layer () made of steel or made of glass fiber tape.

Electricity transmission cable with mass-impregnated paper insulation

In an arrangement for connecting a high-voltage or very-high-voltage power cable comprising an insulative external jacket to an equipment element comprising an external surface by means of an insulative layer, the insulative layer consists of a composite material resistant to traction in the longitudinal direction of the cable and attached to said external jacket and to the external surface.

Arrangement for connecting a power cable to an equipment element

The present invention relates to a device comprising at least one electrical cable (, and) for transporting DC current, said electrical cable comprising an elongate electrical conductor (, and) surrounded by at least one first semiconducting layer (), an electrically insulating layer (and) surrounding the first semiconducting layer and a second semiconducting layer (and) surrounding the electrically insulating layer, characterized in that the electrical cable (, and) furthermore comprises a space charge trapping layer (, and) obtained on the basis of a polymeric composition comprising at least one organic polymer and at least one linear filler, the space charge trapping layer (, and) replacing at least in part the second semiconducting layer (, and) of the electrical cable, so that the space charge trapping layer is in physical contact with the electrically insulating layer (, and) of the electrical cable.

Device comprising a space charge trapping layer

The present invention relates to an electric cable comprising a conductor element, an electrically insulating layer surrounding said conductor element, said electrically insulating layer being obtained from a mixture comprising polyethylene and a styrene copolymer, wherein the polyethylene is a plurimodal polyethylene.

High voltage electric cable

A termination for extra high voltage includes, around a central conductor (), a deflector cone () made of flexible material covered by a polymer insulator having a first internal insulating element () and containing a conducting deflector (), the conductor () is connected to an output terminal (). The maximum diameter (D) of the first insulating element () at right angles to the length (L) of the deflector cone () included between the conducting deflector () and the adjacent end of the output terminal () is greater than or equal to double the maximum diameter (d) of the conducting deflector ().

Electrical termination for extra high voltage

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 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

The invention relates to a synthetic material end for a DC electric cable. In the invention, the synthetic material end includes a composite insert that is placed between the inner insulator and the outer insulating sleeve of the cable, the insert generally being in the form of a sheath surrounding the inner insulator over a partially-stripped portion of the cable, and being made up of a resistive portion of high resistivity, and of a semi-conductive portion of lower resistivity, the interface between said resistive and semi-conductive portions forming a deflector, the end of the resistive portion that is remote from the deflector being electrically connected to the central conductor of the cable, and the end of the semi-conductive portion that is remote from the deflector being electrically connected to the outer semi-conductor of the cable. Application to making connections to high-voltage electric cables.

Synthetic material end for a DC electric cable

A terminal structure () for a superconducting cable () is described. It consists of a conductor () and an insulator () that surrounds the conductor (), wherein the superconducting cable () has a core with a superconducting conductor () and a layer of insulation that surrounds the conductor (), and wherein the core is arranged in such a way that it can move longitudinally in a cryostat. The conductor () of the terminal structure () is electrically connected with the superconducting conductor () or with a normal conductor () that is connected with the superconducting conductor () by means of a tubular part () made of an electrically conductive material, wherein the superconducting conductor () or the normal conductor () can slide in the part () in the direction of the superconductor.

Terminal structure

A device for feeding electricity under high voltage to a superconductive apparatus is situated in a cryostat. The device comprises two bushings each comprising a first connection terminal situated outside the cryostat, and a second connection terminal situated inside the cryostat. According to the invention, the distance D between the first connection terminals is greater than the distance d between the second connection terminals, the distances D and d being sufficient to avoid electric discharge either between the first terminals or between the second terminals. Advantageously, the cryostat includes an enlargement situated above the two bushings and between them.

Device for feeding electricity to a superconductive apparatus under medium or high voltage

A connection arrangement for electrically interconnecting the shields of so-called 'cold-dielectric' superconductor cables in the context of a muiltiphase superconductive electrical link, each super-conductor cable comprising a central superconductor presenting superconductivity at cryogenic temperature, electrical insulation surrounding the central conductor, a shield surrounding the electrical insulation, and a cryostat surrounding said shield. According to the invention, the arrangement comprises a superconductive link between said shields, said superconductive link comprising a link superconductor and a cryogenic sheath surrounding said link superconductor, each of the two ends of said link superconductor being connected to a respective one of said shields by connection means that are both electrically and thermally conductive. The invention is particularly applicable to high voltage electricity.

Growing community of inventors

Villebon S/Yvette, France

Pierre Mirebeau