Insulation studies and experimental results for high Tc superconducting power cable

In this paper, we studied electric insulation characteristics of synthetic Laminated Polypropylene Paper (LPP) in liquid nitrogen (LN/sub 2/) for the application to high temperature superconducting (HTS) cable. And, we selected the insulation paper/LN/sub 2/ composite insulation type for the electric insulation design of a HTS cable. Furthermore, we compared the breakdown characteristics of the butt gap and bent mini-model cable that comes into being in this kind of cryogenic insulation type. It is necessary to understand the winding parameter of insulation paper/LN/sub 2/ composite insulation.