One area of a manufacturing plant had a high rate of motor replacements. Despite a great deal of expense and effort, the cause eluded discovery for years. Two different motor maintenance shops had done post-mortems on some of these motors. Bearing failure was almost always the failure mode, and both shops recommended laser alignment and vibration testing.
Electrical Troubleshooting Quiz — Feb. 6, 2018
Tips and tricks for diagnosing motor maintenance issues