The Characteristics of Current Distribution of a Coaxial HTS Cable and Insulation of Mini-model Cable

동축 고온 초전도 케이블의 전류분포 및 mini-model 케이블의 전기절연

In order to verify the extended theory, we have fabricated a two layers cable with the same twisting layer pitch. It was observed that almost all the operational current less than the critical current flowed on the outer layer because of its lower inductance. In case of operational current more than critical currents of layers, the flux flow resistances affect strongly current waveform and thereby the currents of layers were determined by the flux flow resistances. And we investigated withstand voltage, impulse voltage and breakdown characteristics of mini-model cable. In these test, the withstand voltage and impulse voltage test was satisfied and the breakdown voltage was 110kV.