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World's first transmission voltage cable is installed in commercial grid.(SUPERCONDUCTORS)

The Long Island Power Authority (LIPA) and American Superconductor Corp (AMSC), both USA, have announced the operation of the world's first high-temperature superconductor (HTS) power transmission cable system in a commercial power grid.

The 138 kV system consists of three individual HTS power cable phases running in parallel. The cable system was designed, manufactured and installed by French cable company Nexans.

The cable uses HTS wire produced by AMSC, which was also the prime contractor for the project. The cable system is 6090 m (two thousand feet) long and is cryogenically cooled using a liquid nitrogen refrigeration system from Air Liquide, France.

The ...

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