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4 lip 2021 · This article will review four major enclosure options (ODP, WPII, TEWAC and TEAAC) for large- and medium-size electric motors (3,000 horsepower [hp] or larger) and a guide for selecting proper motor enclosure types while considering cooling methods, pros/cons, motor size, cost, reliability and site environments.
review four major enclosure options (ODP, WPII, TEWAC and TEAAC) for large- and medium-size electric motors (3,000 horsepower [hp] or larger) and a guide for selecting proper motor enclosure types while considering cooling methods, pros/cons, motor size, cost, reliability and site environments.
In terms of costs, WPII is the least expensive, and requires the most mainte-nance. A TEWAC costs 10% to 15% more for the same power rating, while a TEAAC costs about 30% more. Exceptions are 2 pole or 3,600 RPM@60 HZ motors which. are rarely used.
1 sty 2016 · Further, WPII is the least reliable motor when reviewed against performance during 20 years of service • The next type of enclosure is Totally Enclosed Air to Air Cooled (TEAAC). It is cooled using a large air-to-air radiator on top of the motor.
The more common of these enclosure types are Open machines: Drip-Proof (ODP), and Weather Protected (WPI/WPII); Totally Enclosed machines: Fan Cooled (TEFC), Pipe-Ventilated (TEPV), Air Over (TEAO), Non-Ventilated (TENV), Air to Air (TEAAC), Water to Air (TEWAC), and Explosion-proof (XP); and those with encapsulated or sealed windings.
17 lip 2020 · TEWAC enclosures run like TEAAC enclosures, but external circulating air is replaced by water to remove heat from the heat exchanger. These applications are usually used for larger refiner motors. Explosion Proof (XP)
1 paź 2001 · WPII motors provide a higher degree of protection than WPI models and are usually used outdoors in mild-to-moderate climates. WPII motors have a hood on top, which directs air through three, 90-deg changes in direction prior to entering the motor.
