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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.
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.
10 sie 2016 · TEAAC When the motor is outdoors and too big for a TEFC and when a WPII type is not acceptable for environmental reasons, a totally enclosed air-to-air cooled (TEAAC) enclosure is usually the next choice. The motor has a large air-to-air cooler on top so hot air created in the motor is circulated up and over the heat exchanger.
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.
Weather Protected Type 2 (WPII) - This enclosure is utilized on pumps that need a high degree of protection. Ventilation air is routed in such a way that airborne particles will not enter the electric parts of the motor.
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.
