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Bi-2223 multifilament tapes and multistrand conductors for HTS power transmission cables

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10 Author(s)
Leghissa, M. ; Corp. Res. & Dev., Siemens AG, Erlangen, Germany ; Fischer, B. ; Roas, B. ; Jenovelis, A.
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For application in high-power transmission cables, multifilamentary 2223 BPSCCO/Ag tapes have been prepared using the powder-in-tube (PIT) process. Critical current densities at 77 K of 33 kA/cm/sup 2/ in short samples and 22 kA/cm/sup 2/ over 400 m have been achieved. Machine stranded flexible cable conductors have been made with a length up to 10.5 m. The electrical performance has been evaluated at 77 K both under DC and AC conditions, yielding a current capacity up to 1420 A and purely hysteretic AC losses. Tests of the mechanical stability under bending conditions and repeated thermal cycling showed no serious degradation of the electrical performance.

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Applied Superconductivity, IEEE Transactions on  (Volume:7 ,  Issue: 2 )