| 摘要 |
There is provided a superconductive cable capable of promoting a heat insulating function by a heat insulating tube and capable of maintaining the heat insulating function of the heat insulating tube at a minimum even when outside of the heat insulating tube is destructed in transportation. A heat insulating tube 2 contained with a cable core 3 of a superconductive cable 1 includes a first metal tube 21 and a second metal tube 22 and a third metal tube 23 arranged from an inner side in a diameter direction. An inner side heat insulating portion 5 is formed between the first metal tube 21 and the second metal tube 22, and an outer side heat insulating portion 7 is formed on an inner side of the third metal tube 23 and on an outer side of the inner side heat insulating portion 5. A heat insulating function of the heat insulating portion on an outer side is set to be lower than a heat insulating function of the heat insulating portion on an inner side thereof. |
