Abstract: A superconducting cable system includes a superconducting cable (1); a first cryogenic jacket (2) containing the cable (1); and a superconducting device (8) connected to the cable (1). The superconducting cable system also has a second cryogenic jacket (7) containing the superconducting device (8); at least one first terminal (3) connected to the superconducting device (8); and a cooling unit (4) connected to the at least one first terminal (3).

Abstract: An electrically connecting device (1) includes a linking part defining an internal channel (12) that opens onto the exterior of the linking part. The internal channel (12) is able to receive two end segments of two superconducting wires (2, 3) that lie parallel in the internal channel (12) over a segment of common length; and an aperture (13) in the external jacket of the linking part. The aperture (13) is in communication with the internal channel (12) in order to allow a brazing material in liquid form to be inserted into the internal channel (12) around the two end segments of the two superconducting wires (2, 3).

Abstract: The invention specifies a termination (1) for a superconducting cable (2) which is arranged in a tubular cryostat, which serves for carrying a coolant, and has at least one electrical conductor. The termination (1) has an inner sheath (3), in which one end of the cable (2) is arranged in a coolant, and an outer sheath (4), wherein the sheaths (3, 4) are composed of electrically insulating material and insulating material is arranged in an existing intermediate space (5) between the inner and the outer sheath. The inner sheath (3) is connected to the cryostat, and the termination (1) is arranged vertically in the assembly position such that a lower part (C) of the inner and the outer sheath (3, 4) is connected to earth and an upper part (A) of the inner and the outer sheath (3, 4) is connected to high-voltage potential in the operating state. At the respective upper end, the inner sheath (3) is closed off by a first bursting disc (3a) and the outer sheath (4) is closed off by a second bursting disc (4a).

Abstract: The invention specifies a termination (1) for a superconducting cable (2) which is arranged in a tubular cryostat, which serves for carrying a coolant, and has at least one electrical conductor. The termination (1) has an inner sheath (3), in which one end of the cable (2) is arranged in a coolant, and an outer sheath (4), wherein the sheaths (3, 4) are composed of electrically insulating material and insulating material is arranged in an existing intermediate space (5) between the inner and the outer sheath. The inner sheath (3) is connected to the cryostat, and the termination (1) is arranged vertically in the assembly position such that a lower part (C) of the inner and the outer sheath (3, 4) is connected to earth and an upper part (A) of the inner and the outer sheath (3, 4) is connected to high-voltage potential in the operating state. At the respective upper end, the inner sheath (3) is closed off by a first bursting disc (3a) and the outer sheath (4) is closed off by a second bursting disc (4a).

Abstract: A termination unit (1) for a superconducting cable (3), has an internal electrically insulating envelope (2) containing the phase conductors (3A, 3B, 3C) of the cable (3) in a cryogenic fluid. The internal envelope (2) has, for each phase conductor (3A, 3B, 3C), one first electrical connector (6A, 6B, 6C) connected to the corresponding phase conductor (3A, 3B, 3C) and protruding from the internal envelope (2). The termination unit (1) further has an electrically conductive, grounded casing (7) surrounding the internal envelope (2) and the first electrical connectors (6A, 6B, 6C), the grounded casing (7) comprising one bushing (8A, 8B, 8C) for each one of the first electrical connectors (6A, 6B, 6C), each bushing (8A, 8B, 8C) being connected to one of the first electrical connectors (6A, 6B, 6C) by a second electrical connector (9A, 9B, 9C) and being adapted to transmit voltage and current from its associated phase conductor (3A, 3B, 3C).

Abstract: A termination unit (1) for a superconducting cable (3), has an internal electrically insulating envelope (2) containing the phase conductors (3A, 3B, 3C) of the cable (3) in a cryogenic fluid. The internal envelope (2) has, for each phase conductor (3A, 3B, 3C), one first electrical connector (6A, 6B, 6C) connected to the corresponding phase conductor (3A, 3B, 3C) and protruding from the internal envelope (2). The termination unit (1) further has an electrically conductive, grounded casing (7) surrounding the internal envelope (2) and the first electrical connectors (6A, 6B, 6C), the grounded casing (7) comprising one bushing (8A, 8B, 8C) for each one of the first electrical connectors (6A, 6B, 6C), each bushing (8A, 8B, 8C) being connected to one of the first electrical connectors (6A, 6B, 6C) by a second electrical connector (9A, 9B, 9C) and being adapted to transmit voltage and current from its associated phase conductor (3A, 3B, 3C).

Abstract: 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.

Abstract: 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.

Abstract: A contact element (4) provided with an electrical connection element (4A), 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 (4E, 4E?, 4E?) intended to form thermal conduction baffles.

Abstract: A method of managing thermal contraction of a superconductor cable (2) having a cable body surrounded by an external screen (2A) made form wound metal elements and installed between its ends in an enclosure (1) or cryostat filled with a cryogenic liquid, where the method includes mechanically applying a locking force loading only said screen (2A) at a so-called locking point (5A, 5B) in the vicinity of the ends of the cable.

Abstract: An electrical bushing structure includes a central conductor (19) designed to have one (26) of its two ends connected to a superconductor element situated in an enclosure (11) at cryogenic temperature, and its other end (25) connected to an article at ambient temperature. An electrically insulating sheath (20) surrounds the conductor over substantially the entire length of the conductor. A metal tube (24) surrounds the conductor over substantially its entire length and is interposed between the insulating sheath (20) and the conductor (19), the tube being mechanically fastened to the conductor close to one of the ends (25, 26) 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.

Abstract: A contact element (4) provided with an electrical connection element (4A), 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 (4E, 4E?, 4E?) intended to form thermal conduction chicanes.

Abstract: A method of managing thermal contraction of a superconductor cable (2) having a cable body surrounded by an external screen (2A) made form wound metal elements and installed between its ends in an enclosure (1) or cryostat filled with a cryogenic liquid, where the method includes mechanically applying a locking force loading only said screen (2A) at a so-called locking point (5A, 5B) in the vicinity of the ends of the cable.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: The invention relates to a high voltage electrical connection structure for a superconductive element cooled by a cryogenic fluid in a cryostat and connected to an electrical bushing that passes through at least one enclosure at ambient temperature, said bushing comprising a central conductor having its top end connected by means of a connection arrangement to a connection part extending to outside the enclosure at ambient temperature and passing through a top wall of said enclosure, said central conductor being surrounded over the major fraction of the length by an electrically insulating sheath fastened rigidly to the bottom wall of said enclosure at ambient temperature.

Abstract: 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.

Abstract: A termination for connecting one end of a superconductive cable (10), wherein the end of the superconductor is made up of at least one resistively-conductive central support (12) of substantially cylindrical shape and disposed around the support, and wherein an insulating sheath (18) surrounds the superconductor. The end of the cable is stripped in order to reveal the central support (12) and the superconductor (14,16), and the termination has a metal sleeve (30) made up of two portions adjacent in succession, wherein a first portion (32) is engaged around the stripped portion of the central support, and a second portion (34) is soldered around the stripped portion of the superconductor.

Abstract: A termination for connecting one end of a superconductive cable (10), the end being made up of at least one resistively-conductive central support (12) of substantially cylindrical shape, of a superconductor (14, 16) disposed around the support, and of an insulating sheath (18) surrounding the superconductor. According to the invention, the end of the cable is stripped in order to reveal the central support (12) and the superconductor (14, 16), and the termination comprises a metal sleeve (30) made up of two portions adjacent in succession, a first portion (32) engaged around the stripped portion of the central support, and a second portion (34) soldered around the stripped portion of the superconductor. The invention is applicable to terminating high voltage cables.