Abstract: The arrangement method of superconducting wires of a superconducting cable, includes: in a case where a refrigerator is installed at one of terminal structures provided on both sides of a superconducting cable, and a cooling fluid is passed through the superconducting cable by a pump for cooling, setting the numbers of superconducting wires of sections of the superconducting cable installed between the terminal structures on both the sides to be different depending to temperatures of the sections, wherein the numbers of superconducting wires are increased from the section of the superconducting cable having the lowest temperature to the section thereof having the highest temperature while maintaining a current-carrying capability.

Abstract: A stop joint for a superconducting cable is provided to maintain superconducting properties by installing the stop joint on a long distance line in which a long distance superconducting cable has to be installed and unitizing a circulation path of a cooling fluid.

Abstract: A termination structure for a superconducting cable is provided. The termination structure for a superconducting cable includes a first tube including a conductive rod therein to form a room temperature section, a second tube including a conductive rod therein to form a temperature gradient section, and a spacer provided between the first and second tubes, the spacer comprising a conductive connector configured to connect the conductive rods inside the first and second tubes to each other. The first and second tubes are joined to be separable from each other.

Abstract: Provided is a superconducting cable configured to improve superconductivity by increasing reflectivity of cryostats and enhancing cooling performance. The superconducting cable includes: a core provided with a conductor; and a cryostat surrounding a periphery of the core. A material of the cryostat is aluminum or an aluminum alloy and a surface roughness of the cryostat is 30 microns or less in terms of RMS value.

Abstract: A superconducting cable having wide-width superconducting strip lines. The superconducting cable having wide-width superconducting strip lines includes, from the center of the cable, a former, a superconducting layer, an electronic insulation layer, and a superconducting shield layer. The superconducting layer is formed as a plurality of superconducting strip lines spirally wound around the circumference of the former, and each of the strip lines has a rectangular cross section. The strip lines are, respectively, made up of a wide-width strip line of which the ratio of the width to the thickness is within the range of 20 to 30. The cable may prevent to deteriorate the efficiency of the cable, by reducing the vertical element of the magnetic field occurred around the strip lines. The structure disclosed herein may reduce the whole intensity of the magnetic field, and reduce the whole outer diameter of the cable.

Abstract: Disclosed herein is a shielding conductor connecting structure of a terminal for super-conductor cable. The shielding conductor connecting structure includes an inner cryostat for forming an extremely low temperature portion while having a super-conductor cable formed therein, an outer cryostat formed with an interval so that a shielding conductor is extracted from the super-conductor cable, a plurality of vacuum tubes formed at an interval to protrude along an outer circumferential surface of the outer cryostat, a short-circuit conductor formed in each of the vacuum tubes to be connected to another phase connection portion and a short-circuit conductor connection portion formed in the interior of the outer cryostat and connected to the short-circuit conductor in the vacuum tube while being connected to the shielding conductor connected to the super-conductor cable.

Abstract: Disclosed herein is a temperature movable structure of a superconducting cable terminal. The superconducting cable terminal has sections of a high temperature portion, a temperature movable portion and an extremely low temperature portion. The temperature movable structure is disposed in the section of the temperature movable portion between the sections of the high temperature portion and the extremely low temperature portion. The temperature movable structure has upper and lower spacer members, a pipe body, first and third conductors, a second conductor and a contact connecting member disposed between the first and second conductors.

Abstract: A cryostat of a superconducting cable disclosed herein includes an inner metallic tube filled with liquid nitrogen and extended along the circumference of a core, an outer metallic tube surrounding the circumference of the inner metallic tube at a distance, a cooling vessel of a terminal connecting box connected to the inner metallic tube and filled with liquid nitrogen, an insulation tube surrounding the circumference of the cooling vessel at a distance, an inner bellows tube connecting an end of the outer metallic tube to the cooling vessel, and an outer bellows tube spaced apart from the inner bellows tube and connecting the end of the outer metallic tube to the insulation tube.

Abstract: An apparatus for supplying liquid nitrogen for a decompression device: includes a liquid nitrogen supply line extending such that high-temperature, high-pressure liquid nitrogen is introduced to a decompression device; a bypass pipe diverging from the liquid nitrogen supply line; and an expansion unit installed at the bypass pipe to evaporate the liquid nitrogen into nitrogen gas. The expansion unit is disposed to absorb heat from the liquid nitrogen in the liquid nitrogen supply line before being introduced to the decompression device.