Abstract: A superconductive cable which has a cryostat with two concentric metal pipes where the cryostat has at least a first axial section with a first axial spring constant, and at least a second axial section which has a second axial spring constant which at most is 20%, more preferred at most 10%, of the axial spring constant of the first section.

Abstract: An arrangement of a two-phase superconducting cable as a power supply cable in two-phase power distribution networks for electric railways include two phase conductors which are arranged coaxially with respect to one another and are separated from one another by an inner dielectric. A cryostat, with the superconducting cable arranged therein, has two tubes which run co-axially and at a distance from one another with vacuum insulation between them, where in addition to the superconducting cable, the cryostat surrounds a free space for a coolant to be passed through, and where an outer dielectric is fitted over the outer phase conductor of the superconducting cable.

Abstract: A superconducting cable system in which at least one superconducting electrical cable is arranged in a cryostat which consists of two metallic tubes, which are arranged concentrically and at a distance from one another. Vacuum insulation is fitted in the circumferential gap formed by the distance between the tubes, which vacuum insulation consists of spaces composed of a material having low thermal conductivity and plastic films coated with a metal and having high reflectivity. The gap is evacuated. In addition, thermally insulating material (9) is arranged in the gap, and its thermally insulating characteristics are independent of the vacuum which is produced between the two tubes (5, 6).

Abstract: A method is specified for production of a superconducting electrical conductor which has a ceramic material as the superconducting material. A metal ribbon is formed around a multiplicity of flat strips of a mount which is coated with the superconducting ceramic material, running longitudinally to form a tube having a slot which runs in the longitudinal direction, and whose edges which rest on one another on the slot are welded to one another The tube which is closed by the welding process is then reduced to a diameter which corresponds approximately to the envelopes of all the strips which are located in the tube.

Abstract: An arrangement for current limiting is specified, using components (4, 5, 6) composed of a superconducting material which are arranged in a cryostat (KR) which comprises two metallic tubes (1, 2) which are arranged concentrically with respect to one another and between which vacuum insulation (3) is fitted, and which cryostat surrounds a free space (FR) for a coolant to pass through. The components (4, 5, 6) each comprise three phase conductors (7, 8, 9) composed of a superconducting material based on rare earths (ReBCO), which are arranged insulated from one another and concentrically with respect to one another.

Abstract: A superconductive electric cable is provided in which a cable core is arranged in a cryostat, where the cable core is composed of three phase conductors arranged concentrically around an inner cooling duct, with an electric insulation arranged between the phase conductors, and where the cryostat is surrounded by an electric insulation, which is surrounded by a neutral conductor of normally conductive materials. In this cable, a neutral conductor or a screening is arranged only outside of the cryostat, and is formed by normally conductive material which surrounds the cryostat as a common neutral conductor, where an insulating material is arranged between this neutral conductor and the cryostat.

Abstract: An arrangement is specified for current limiting having a superconducting cable (SK) which is arranged in a cryostat (KR) which has an outer wall which comprises two metallic tubes (1, 2) which are arranged concentrically with respect to one another and between which vacuum insulation (3) is incorporated. The cryostat (KR) surrounds a free space (FR) for a coolant to pass through, in which free space (FR) the superconducting cable (SK) is arranged. It also has an inner wall (IW) which surrounds a cylindrical cavity (HR) and likewise comprises two metallic tubes (4, 5) which are arranged concentrically with respect to one another, between which vacuum insulation (6) is incorporated, and which is located within the outer wall (AW) and is separated therefrom by the free space (FR). The superconducting cable (SK) which has a superconducting conductor, a dielectric surrounding the same and a superconducting screen which is arranged above the same, is wound in a helical shape around the inner wall (IW).

Abstract: A method is specified for operation of an arrangement having at least one superconducting cable, which is surrounded by a cryostat which consists of two metallic tubes, which are arranged concentrically with respect to one another and enclose vacuum insulation between them. The cryostat surrounds not only the cable but also a cavity for a pressurized coolant to pass through. A reservoir area, which is connected to the cryostat, for the coolant is arranged at least at one end of the cryostat and a pump is used which forces the coolant into the cryostat during operation of the arrangement. A valve is arranged at least in the supply path of the coolant from the reservoir area to the cryostat, which valve is open during operation of the arrangement, is connected to at least one unit monitoring the soundness of the cryostat and is blocked when a signal which corresponds to a fault message is present from the monitoring unit, in order to interrupt the supply of the coolant to the cryostat.

Abstract: A method of manufacturing a superconductive electric conductor is indicated, which includes as the superconductive material as ceramic material. For carrying out the method, around a plurality of flat strips (1) of a carrier coated with a superconductive ceramic material, a longitudinally entering metal band (3) is formed into a pipe having a slot extending in the longitudinal direction, where the edges located at the slot next to each other are welded together. The strips (1) are fed to the pipe with continuous change of location in such a way that each strip along the length of the conductor assumes different positions over the cross section thereof. The pipe (9) closed by the welding procedure is subsequently reduced to an interior width which corresponds approximately to an enveloping curve of all strips (1) located in the pipe.

Abstract: An arrangement with at least one superconductive cable (1) is indicated which is arranged in a cryostat (KR) serving for guiding a cooling agent, wherein the cryostat (KR) includes at least one thermally insulated metal pipe to the outside of the cryostat (KR) is applied an electrically well conductive material that is composed of at least two strands (6, 7) which are wound one above the other with oppositely pitched direction around the cryostat (KR). The strands are connected fixedly and immovably to the cryostat (KR) at fixed points (8) mounted at axial spacings.

Abstract: The invention relates to a superconductive electric cable (SK) that has at least one superconductive conductor (1) that consists of strips or wires that are wrapped in at least one layer around a support designed as a tube (2). The tube (2) is elastically deformable and has a gap (8) extending over its entire length in an axial direction.

Abstract: A method for laying a superconductor cable having a superconductive cable core and a cryostat enclosing the superconductive cable core, with the superconductive cable core being arranged freely mobile in the cryostat. The method includes cooling the superconductive cable core to the operating temperature after laying the superconductor cable, shortening the superconductive cable core relative to the cryostat, fixing the superconductive cable core at its ends; and mounting terminations on the ends of the cable core.

Abstract: A transmission system is provided with a superconductive cable having three phase conductors and a cryostat, surrounding the phase conductors, and encasing a hollow space, for conducting a cooling agent. For the three phase conductors, a common neutral conductor is provided, being made of electrically normally conducting material, carried out as insulating round conductor and placed outside the cryostat and next to it. The cryostat is made of a circumferentially enclosed, thermally insulated sheath.

Abstract: A method for arranging a superconductor cable including the step of laying the superconductive cable core into a cryostat with an overlength in comparison to the axial length of said cryostat. After laying the superconductive cable core, it is cooled to its operating temperature thereby shortening the superconductive cable core relative to the cryostat. After cooling the superconductive cable core, the shortened superconductive cable core is mechanically fixed at its two ends to the ends of the cryostat. After fixing the shortened superconductive cable core, terminations are mounted on the ends of the cable core, such that if the superconductive cable core heats up, the core deforms into a wave or helix inside the cryostat, with the length change that acts on components of the superconductor cable being negligible.

Abstract: A superconducting cable system in which at least one superconducting electrical cable is arranged in a cryostat which consists of two metallic tubes, which are arranged concentrically and at a distance from one another. Vacuum insulation is fitted in the circumferential gap formed by the distance between the tubes, which vacuum insulation consists of spaces composed of a material having low thermal conductivity and plastic films coated with a metal and having high reflectivity. The gap is evacuated. In addition, thermally insulating material (9) is arranged in the gap, and its thermally insulating characteristics are independent of the vacuum which is produced between the two tubes (5, 6).

Abstract: A method is specified for operation of an arrangement having at least one superconducting cable, which is surrounded by a cryostat which consists of two metallic tubes, which are arranged concentrically with respect to one another and enclose vacuum insulation between them. The cryostat surrounds not only the cable but also a cavity for a pressurized coolant to pass through. A reservoir area, which is connected to the cryostat, for the coolant is arranged at least at one end of the cryostat and a pump is used which forces the coolant into the cryostat during operation of the arrangement. A valve is arranged at least in the supply path of the coolant from the reservoir area to the cryostat, which valve is open during operation of the arrangement, is connected to at least one unit monitoring the soundness of the cryostat and is blocked when a signal which corresponds to a fault message is present from the monitoring unit, in order to interrupt the supply of the coolant to the cryostat.

Abstract: A method is specified for production of a superconducting electrical conductor which has a ceramic material as the superconducting material. A metal ribbon is formed around a multiplicity of flat strips of a mount which is coated with the superconducting ceramic material, running longitudinally to form a tube having a slot which runs in the longitudinal direction, and whose edges which rest on one another on the slot are welded to one another The tube which is closed by the welding process is then reduced to a diameter which corresponds approximately to the envelopes of all the strips which are located in the tube.

Abstract: A system is specified having at least one superconducting cable (SK) which has at least one superconducting conductor (2), and having a cryostat (KR) which surrounds the same and has two metallic tubes, an inner tube (6) and an outer tube (7), which are arranged concentrically at a distance from one another, are corrugated transversely with respect to their longitudinal direction and between which vacuum insulation (8) is arranged. The cable (SK) has a central tubular support (1) for passing a coolant through, on which the superconducting conductor (2) rests. The cable (SK) is surrounded all around by a buffer layer (5) which protects the same against mechanical damage and consists of insulating material, and the inner tube (6) of the cryostat (KR) at least rests in a sealed manner on the buffer layer (5).

Abstract: An arrangement of a two-phase superconducting cable as a power supply cable in two-phase power distribution networks for electric railways include two phase conductors which are arranged coaxially with respect to one another and are separated from one another by an inner dielectric. A cryostat, with the superconducting cable arranged therein, has two tubes which run co-axially and at a distance from one another with vacuum insulation between them, where in addition to the superconducting cable, the cryostat surrounds a free space for a coolant to be passed through, and where an outer dielectric is fitted over the outer phase conductor of the superconducting cable.

Abstract: A method for laying a superconductor cable having a superconductive cable core and a cryostat enclosing the superconductive cable core, with the superconductive cable core being arranged freely mobile in the cryostat. The method includes cooling the superconductive cable core to the operating temperature after laying the superconductor cable, shortening the superconductive cable core relative to the cryostat, fixing the superconductive cable core at its ends; and mounting terminations on the ends of the cable core.