SUPERCONDUCTIVE CABLE

• Main Authors: SERIZAWA MASAHIRO, MASUDA TAKAHITO, HIROSE MASAYUKI, MIMURA TOMOO, NAKANO TETSUTARO
• Format: Patent
• Language: English; Japanese
• Published: 30.08.2018
• Subjects: BASIC ELECTRIC ELEMENTS; CABLES; CONDUCTORS; ELECTRICITY; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES

PROBLEM TO BE SOLVED: To provide a superconductive cable that suppresses a current accompanying arc discharge due to ground fault occurred in a cable core from branching to an inner tube to suppress the inner tube from being damaged.SOLUTION: A superconductive cable includes: a superconductive layer; a cable core having a grounding layer provided via an electric insulation layer on an outer periphery of the superconductive layer; an inner tube that houses the cable core and is filled with a liquid coolant; a heat insulation tube having an external tube forming a heat insulation layer on the outside of the inner tube; an arc resistant member that includes a fiber material in which a plurality of fibers are densely arranged, is interposed between the cable core and the inner tube and suppresses a current accompanying the arc discharge due to the ground fault generated at the cable core from branching to the inner tube; and an aperture suppression structure that suppresses formation of gaps between the fibers of the fiber material by volume expansion when a constituent member located in the neighborhood of the ground fault point of the cable core is vaporized.SELECTED DRAWING: Figure 1 【課題】ケーブルコアで発生した地絡によるアーク放電に伴う電流が内管に分流することを抑制し、内管の損傷を抑制する超電導ケーブルを提供する。【解決手段】超電導導体層と、前記超電導導体層の外周に電気絶縁層を介して設けられる接地層とを有するケーブルコアと、前記ケーブルコアを収納すると共に液体冷媒が充填される内管と、前記内管の外側に断熱層を形成する外管とを有する断熱管と、複数の繊維を密に配置した繊維材料で構成され、前記ケーブルコアと前記内管との間に介在されて、前記ケーブルコアで発生した地絡によるアーク放電に伴う電流が前記内管に分流することを抑制する耐アーク部材と、前記ケーブルコアの地絡点近傍に位置する構成部材が気化した際の体積膨張で、前記繊維材料の繊維間に隙間が形成されることを抑制する目開き抑制構造とを備える超電導ケーブル。【選択図】図１