BI-2223 MULTIFILAMENT TAPES AND MULTISTRAND CONDUCTORS FOR HTS POWER TRANSMISSION CABLES

For application in high-power transmission cables, multifilamentary 22 23 BPSCCO/Ag tapes have been prepared using the powder-in-tube (PIT) p rocess. Critical current densities at 77 K of 33 kA/cm(2) in short sam ples and 22 kA/cm(2) over 400 m have been achieved. Machine stranded f lexible cable conductors have been made with a length up to 10.5 m, Th e electrical performance has been evaluated at 77 K both under DC und AC conditions, yielding a current capacity up to 1420 A and purely hys teretic AC losses, Tests of the mechanical stability under bending con ditions and repeated thermal cycling showed no serious degradation of the electrical performance.