SOLID CABLE, ITS MANUFACTURE AND ITS TRANSMISSION LINE

摘要

PROBLEM TO BE SOLVED: To provide a solid cable usable at a higher voltage and at a higher temperature to perform a large capacity transmission of electrical energy by impregnating an insulating layer with a middle viscosity insulating oil having a viscosity within a specified range. SOLUTION: The middle viscosity insulating oil consists of an insulating oil having a viscosity at 60 of 10 cst or more and less than 500 cst. Particularly, the SP value (solubility index) of the insulating oil is preferably set within the range of±1.5 from the SP value of a polyolefin resin film used for the insulating layer. Particularly preferable examples of the insulating oil include dodecyl benzene. A tape containing the polyolefin resin film is preferably used for at least a part of the insulating layer. Particularly, it is preferred to apply a composite tape consisting of a polyolefin resin film and craft papers laminated on both sides thereof and an insulating tape consisting of only the polyolefin resin film to the insulating layer by alternately winding them. Further, a reinforcing layer is suitably formed on the circumference of a metal sheath provided on the circumference of the insulating layer.