Abstract :
OPERATING ECONOMIES are obtained from the use of totally enclosed fan-cooled motors. Power companies employ them outdoors to reduce building costs, and both power companies and industry use them to lower maintenance costs and outages in locations where motor-cooling air might be dirty, dusty, or otherwise unsatisfactory for direct contact with the windings or internal parts of a motor. Where the use of air only as a cooling medium is preferred, the totally enclosed fan-cooled motor with cooling tubes built into the frame finds wide application (see Figure 1).
