| 摘要 |
PURPOSE:To easily cope with the shrinkage of a power cable at the time of cooling by forming the cable in a single core, forming inner and outer metal tubes of corrugated tubes thereby to perform drum winding of a cable and forming it in a snake state at ambient temperature. CONSTITUTION:A cable 30 is formed in a single core, a refrigerant returning passage 45 is formed outside a cable core 32 having a refrigerant forwarding passage 36 in a center, covered with an inner metal tube 44, formed on its outside with a heat insulation layer 46, covered with an outer metal tube 48, and then covered with a corrosionproof layer 49. The tubes 44, 48 are formed of corrugated tubes, thereby performing drum winding of the cable. It is wired in a snake state at ambient temperature to provide a shrinking margin at the time of cooling.
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