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Three Phase AC Motors
Polyphase induction AC motors are the workhorse of modern industry. This training teaches critical maintenance skills in an easy to use format. Learn how to diagnose voltage problems, size overload protection properly, and select the right motor for the job. With attention to concepts and practical skills, this training teaches a comprehensive approach to motor maintenance. Selected as the 2007 Product of the Year Winner by Plant Engineering Magazine.

Time Period Users Price
Web Based
$114.95
Download ‡ n/a (Installed)
$194.95
CD ‡ n/a (Installed)
$219.95
‡ Each purchase allows a single user license
All sales are final. Prices subject to change.


  • Introduction
    • Polyphase AC motor workings
    • How its made
  • Rated Voltage
    • Operating under/over rated voltage
    • Unbalanced voltages
    • Derating factors
  • Load and Current
    • Calculating full load amps
    • Choosing the correct motor
  • Frequency and Phase
    • Rated frequency
    • 3 phase AC power
    • Full Load / Synchronous speed
  • Horsepower
    • Estimating motor load
    • Drive limitations
    • Jack shafts and pillow bearings
  • Enclosures
    • Open / Totally Enclosed
    • NEC Classes
    • Frame size
  • Insulation Class
    • Motor insulation system
    • Insulation life
    • Insulation ratings
  • Bearings
    • Antifriction bearings
    • Number nomenclature
    • Sealed and Shielded
  • Efficiency
    • Calculating efficiency and power factor
    • Causes of power loss
    • Rebuilding high efficiency motors
Three Phase AC Motors

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Voltmeter
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New Standard Institute
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Milford, CT 06460
phone: 203-783-1582
fax: 203-286-2188

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