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5. IMPORTANT APPLICATION
INFORMATION
WARNING! DO NOT USE THIS DRIVE IN AN EXPLOSION
PROOF APPLICATION.
5.1 MOTOR WITH EXTERNAL FAN COOLING
Most totally enclosed fan-cooled (TEFC) and open ventilated
3-phase AC induction motors will overheat if used beyond a
limited speed range at full torque. Therefore, it is necessary to
reduce motor load as speed is decreased.
CAUTION!
1. Some motors have low speed characteristics, which cause overheating
and winding failure under light load or no load conditions. If the motor
is operated in this manner for an extended period of time, it is
recommended that the unloaded motor current be checked from 2-15
Hz (60 - 450 RPM) to ensure motor does not exceed the nameplate
rating. Do not use motor if the motor current exceeds the nameplate
rating.
2. It is recommended that the drive be used with Inverter Duty or TENV
motors.
Note:
Some fan-cooled motors can be used over a wider speed range.
Consult your local Baldor District Office for details.
Inverter duty and most totally enclosed non-ventilated (TENV)
motors can provide full rated torque over an extended speed
range without overheating. See Figure 5-1.
Summary of Contents for ID5601-EO
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