Sumitomo Electric Industries Ltd. has developed wiring than can conduct about 50 percent more current than existing superconductive cables, targeting power producers and medical equipment makers seeking more efficient delivery of electricity.
Sumitomo, whose customers include Tokyo Electric Power Co., Asia’s biggest power producer, in 2004 started producing wires capable of delivering up to 200 amperes. So the new cable should handle 300 amperes. Bismuth-based high-temperature superconductors can transmit 200 times the electrical current of copper cables when cooled with liquid nitrogen, resulting in less wiring being needed to transmit power.
Sumitomo now produces about 500 kilometers (311 miles) of superconductive wiring a year and targets doubling production “within one or two years
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