Development of 3-Phase 1kA Class High Tc Superconducting Power Cable Prototype

A 3-phase HTSC(Bi-2223 silver sheathed) cable prototype[1] was developed. This prototype consists of three cable cores housed together in a thermally insulated pipe. Each cable core has a magnetic shield made with HTSC. The electrical performance of this prototype has been evaluated at 77K with 3-phase transport currents. The measurement of AC losses and inductance show that the dominant loss due to current loading is hysteretic loss, and that magnetic shields confine self magnetic fields within each cable core, and avoid inducing the eddy current loss in the thermally insulated pipe. The total current loading loss at 3-phase 1kA operation was 3.5W/m • cct.