Application of Static Uninterruptible Power Systems to Computer Loads

Reliable operation of on-line computers requires an uninterruptible source of electric power; some computers are sensitive to power interruptions as short as one half-cycle of line frequency. Two static-type uninterruptible power systems that have been purchased by the Federal Aviation Administration for installation at air route traffic control centers are described. One, built by the General Electric Company, represents commercial design and construction; the second, built by the Garrett Corporation, represents design and construction to comply with the Federal Aviation Administration specification prepared for uninterruptible power system equipment.