EE Product News

NEMA 3R Enclosure Harbors VFDs

Made to house the company's E7 variable frequency drive (VFD) for commercial HVAC applications, its standard NEMA 3R enclosure offers a full range of E7 power and voltage ratings, as well as control, communication, and power options. Four voltage ratings are available: 208V, 3-phase, 5 to 150 HP; 230V, 3-phase, 5 to 150 HP; 480V, 3-phase, 5 to 500 HP; and 230V, single-phase, 5 to 75 HP. Shared features include an operating altitude of 3,300' without derating, a maximum relative humidity of 95% non-condensing, and an operating temperature range from -10°C to +40°C at the default carrier frequency or -10°C to +50°C with the output current derated. Additionally, the enclosure carries a UL Type 3R label and has been designed to provide protection against rain, snow, and sleet, as well as defend against airborne dust particles as small as 10 µm. Options include floor-mount kits, lightning protection, space heater and thermostat, air-to-air heat exchangers, and hinged windows. YASKAWA ELECTRIC AMERICA INC., New Berlin, WI. (800) 927-5292.


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