How to Conduct an Industrial Electric Motor Inspection

It is important to remember that you need to inspect your motor both while it is in regular use and periodically while it is in storage.

• Make regular visual inspections a part of your daily routine. Your team should be keeping an eye out for signs of debris buildup, overheating and corrosion. 
• Motor operators should also keep an eye out for any unusual noises and smells while running the machine. Anything out of the ordinary is a sign that a more formal inspection is required. 
• Lubrication and grease levels should also be checked frequently while the motor is in regular use. 
• When in regular operation, on a weekly basis, you will also want to perform a more in-depth inspection. You can perform a similar inspection every 6 months when the motor is in storage, turning on the motor as-needed for specific steps: 
• • Inspect key components while the motor is running to ensure temperatures fall within specified tolerances: electric joints, the motor body surface and other key joints.
  • Take direct measurements at the MCC and motor junction boxes 
  • Check the starter switch and fuses to make sure they are appropriately tightened. 
  • Perform vibration testing at bearing houses to make sure they are within acceptable levels. 
  • Check all brushes, replace brushes worn greater than 50%.  
  • Check operating speeds, brush pressure and position to ensure they are all correct.
  • Use shock-pulse monitoring to identify damaged bearings
  • Complete a motor current signature analysis to identify insulation degradation, rotor bar damage, and end-ring joint issues in the rotor.