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Presented by John Allen -

Principles of Medium and Large AC Machines

About the program
"Principles of Medium and Large AC Motors" is highly rated by attendees. The seminar and its companion second edition manual, was originally produced by Austin Bonnett, EASA's education and technology consultant, in collaboration with EASA's Technical Support Specialists.

While the course covers horizontal and vertical squirrel-cage induction motors in the 300 to 5,000 horsepower range, low- and medium-voltage, most of the principles covered apply to other sizes as well. This manual focuses primarily on NEMA motors.

Seminar highlights include:

  • Motor nomenclature & definitions
  • Motor enclosures
  • Typical motor applications
  • Safety & handling considerations
  • Basic motor theory
  • Motor standards
  • Stators
  • Squirrel cage rotors
  • Shafts
  • Bearings & lubrication
  • Motor accessories & terminal boxes
  • Test & inspection procedures
  • Motor alignment, vibration & noise
  • Storage procedures
  • Synchronous machines

Course trainer - John Allen

After graduating from UMIST with a BSC in Electrical Engineering & Electronics, John started his working life in 1970 as an electrical design engineer. He is an authority in our industry, and is also representing EASA in IEC Ex committees and working as an independent engineer and Trainer.