American Superconductor said it's the longest high temperature superconductor cable that's ever been installed. A piece of Long Island, N.Y.'s power grid has received an upgrade, with Devens, Mass.-based American Superconductor (Nasdaq: AMSC) announcing today that a section of high temperature superconductor cable was installed at a major interconnection point in the system. The 2,000-foot long cable, made with wire produced by American Superconductor, is the longest installation of high temperature superconductor, or HTS, cable in the world, according to the company, and the only HTS installation running at transmission voltage. The Long Island Power Authority has already flipped the... ...