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A TEBC enclosure on a motor means "Totally Enclosed, Blower Cooled".
TEBC motors are most commonly used for variable speed motors combined with variable speed drives of some sort. Sometimes these motors are rated as "Inverter duty" or "Vector duty". They are considerably more expensive than similarly rated TEFC motors.
The motor is constructed with a dust tight, moderately sealed enclosure which rejects a degree of water. A constant speed blower pulls air over the motor fins to keep the motor cool at all operating speeds.
Notice that this motor is not suitable for used in "washdown" or "Hazardous" environments.