Transversal conductivity in conductors of "cable in conduit" type

This paper offers a method for measuring and selecting conductivities between the strands and wires and displays the measurement results for transversal electrical conductivity between elements of a cable twisted of superconducting wires based on niobium-tin in bronze matrix. Sub-cables of 2, 3 and 4 wires and cables of 4/spl times/3, 4/spl times/4, 3/spl times/4/spl times/4 and 4/spl times/4/spl times/3 constructions are considered. The coupling losses in CIC-type cables consist of several hundreds of strands are strongly influenced by the transverse resistance. The presented method allows the measurement and identification of the contact resistance between strands, sub-cables and multi-strands core and conductor conduit. Some experimental results for multiply twisted and compacted cables and presented. It is shown that transverse conductivity varies within the range from 10/sup 4/ to 10/sup 9/ (Ohm*m)/sup -1/ and for typical cases, conductivity between the conduit and multistrand core was much less then between the strands and sub-cables.<
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