Association News

NEMA revises guide on AC Adjustable Speed Drive Systems.

Press Release Summary:

Jan 15, 2008 - NEMA Application Guide for AC Adjustable Speed Drive Systems was produced by the 1IS Industrial Automation Control Products and Systems Section, SC7 Subcommittee on Adjustable Speed Drives. According to James E. Armes, the revision includes updated terminology and information on motor terminal voltage transients, fundamental contributors to peak voltages, and single-phase input for 3-phase drives as well as modification of the information on overload capability for motor selection.

National Electrical Manufacturers Association (NEMA) - Rosslyn, VA

Original Press Release

NEMA Publishes Application Guide for AC Adjustable Speed Drive Systems

Press release date: Dec 27, 2007

(ROSSLYN, Va.) - The National Electrical Manufacturers Association (NEMA) has published NEMA Application Guide for AC Adjustable Speed Drive Systems, which was produced by the 1IS Industrial Automation Control Products and Systems Section, SC7 Subcommittee on Adjustable Speed Drives.

"This 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," said James E. Armes, section chairman.

According to Armes, this 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. It also incorporates replacement of the term "cable corona inception voltage (CIV)" by "partial discharge inception voltage (PDIV)."

An electronic copy of NEMA Application Guide for AC Adjustable Speed Drive Systems may be downloaded at no charge, or a hardcopy purchased $101, by visiting NEMA's Web site at www.nema.org/stds/acadjustable.cfm Copies may also be purchased by contacting IHS at 800-854-7179 (within the U.S.), 303-397-7956 (international), 303-397-2740 (fax), or on its Web site global.ihs.com.

NEMA is the trade association of choice for the electrical manufacturing industry. Founded in 1926 and headquartered near Washington, D.C., its approximately 450 member companies manufacture products used in the generation, transmission and distribution, control, and end-use of electricity. These products are used in utility, medical imaging, industrial, commercial, institutional, and residential applications. Domestic production of electrical products sold worldwide exceeds $120 billion. In addition to its headquarters in Rosslyn, Virginia, NEMA also has offices in Beijing, Sao Paulo, and Mexico City.