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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.
10 sie 2016 · The motors are statistically more reliable than a WPII. Air-to-air heat exchangers are not efficient using ambient air of 40 C, so the frame will be larger compared with an open or a WPII motor. TEAAC types are also noisy because the air is forced through the small tubes of the heat exchanger.
TEWAC is the favorite of motor designers with its low noise and good cooling. It is in the same frame as a similar-rated WPII. 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.
1 paź 2001 · WPI motors are routinely provided with rodent screens since they are often used in lightly protected indoor areas where these creatures might chew on the wire insulation. WPII motors provide a higher degree of protection than WPI models and are usually used outdoors in mild-to-moderate climates.
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.
WPII enclosures, also known as WP2, are IP23/24 rated and considered an enhanced version of both ODP and WPI enclosures. These enclosures have external ventilation passages that allow high-speed air to discharge without entering any internal ventilating passages.
