PM and PdM for electric motors: Build the right balance of predictive and preventive tactics to extend long-term operating service life - Webinar Recordings - EASA | The Electro•Mechanical Authority
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Trade press article — Plant Services

PM and PdM for electric motors: Build the right balance of predictive and preventive tactics to extend long-term operating service life

  • May 2015
  • Number of views: 12915
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We often hear the terms preventive maintenance (PM) and predictive maintenance (PdM) of electric motors, but far less often do we give consideration to the tasks associated with these methods of maintaining motor operation and extending operating service life. This article addresses some of the more common activities associated with PM and PdM, with the focus on three-phase squirrel cage motors.

Preventive maintenance:

  • Insulation resistance (IR) test
  • Polarization index (PI) test
  • Motor current signature analysis (MCSA)
  • Mechanical activities such as lubrication, lubricant level checks, and lubricant analysis
  • Visual inspection
  • Thermal scanning
  • Ultrasonic testing
  • Cleaning
  • Belt tensioning
  • Bolt tightness checks

Predictive maintenance activities:

  • Trending and assessing most activities associated with preventive maintenance
  • Vibration analysis
  • Checking and adjusting alignment

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ANSI/EASA AR100

More information on this topic can be found in ANSI/EASA AR100
  • Section 4: Testing

EASA Technical Manual

More information on this topic can be found in EASA's Technical Manual
  • Section 7: Electrical Testing

Related Reference and Training Materials

Principles of Medium & Large AC Motors (NEMA Standards)
  • Section 12: Test & Inspection Procedures

Principles of Medium & Large AC Motors (IEC Standards)
  • Section 12: Test & Inspection Procedures

How To Wind Three-Phase Stators interactive training software
  • Lesson 12: Testing Untreated & Treated Windings

Tags: Predictive maintenance Preventive maintenance
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