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Thomas H. Bishop, P.E., Electrical Apparatus Service Association (EASA)

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Motors & Drives October 1, 2009

Simple solutions can prevent premature damage

Most motor failures stem from damaged bearings or stator windings. Lack of lubrication, over lubrication, misalignment and bearing (shaft) currents often dramatically shorten bearing life. The culprits responsible for premature failure of stator windings include mechanical or thermal overload, poor ventilation and transient voltages from variable-frequency drives.

By Thomas H. Bishop, P.E., Electrical Apparatus Service Association (EASA)
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