The Effect of Butt Gap in Insulation Properties for a HTS Cable

고온초전도 케이블의 절연강도에 미치는 butt gap 의 영향

In this paper, we studied electric Insulation characteristics of synthetic Laminated Polypropylene Paper (LPP) in liquid nitrogen (L$N_2$) for the application to high temperature super-conducting (HTS) cable. And, we selected the insulation paper/L$N_2$composite insulation type for the electric insulation design of a HTS cable. Furthermore, we compared the breakdown characteristics of the butt gap and bended 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/L$N_2$composite insulation.