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NEMA Publishes Guide for Adjustable-Speed Drives
The National Electrical Manufacturers Association has published NEMA Application Guide for AC Adjustable Speed Drive Systems.
The document is intended to facilitate the design, selection of components, and installation of AC electrical drive systems, particularly where an induction motor is used in conjunction with an adjustable-speed drive.
The revision includes updated terminology and information on motor terminal voltage transients, fundamental contributors to peak voltages, and single-phase input for three-phase drives, as well as modification of the information on overload capability for motor selection.