The Institute of Electrical and Electronics Engineers Standards Association (IEEE-SA) Standards Board, Piscataway, N.J., recently approved two new power generation standards, one for adjustable-speed drives, IEEE 958, and the other for harmonic filters, IEEE 1531. The board also approved a revised standard for evaluating how solar radiation affects outdoor metal-enclosed switchgear, IEEE C37.24.

IEEE 958, “Guide for Application of AC Adjustable-Speed Drives on 2,400 to 13,800 Volt Auxiliary Systems in Electrical Power Generating Stations,” is a new standard on the operation, selection, and use of adjustable-speed drives (ASD) for motor-driven systems. It reviews ASD terminology, theory of operation, and selection, as well as drive system classification, typical applications, and ASD design, specifications, and installations.

IEEE 1531, “Guide for Application and Specifications of Harmonic Filters,” is the first standard developed specifically for harmonic filters. It provides guidelines for the use and specifications of shunt harmonic filters operating in 50 Hz and 60 Hz power systems at 216V or more. It also includes criteria for designing, controlling, and protecting these filters.

The revised standard, IEEE C37.24, “Guide for Evaluating the Effect of Solar Radiation on Outdoor Metal-Enclosed Switchgear,” looks at how the sun affects outdoor metal-enclosed switchgear, control switchboards, and metal-enclosed bus. The thermal effects of solar radiation are a factor in defining how much current outdoor metal-enclosed switchgear can carry.