Motors and Motor Control Circuits

Approved for 14 Hours Renewal Training Credit (RTC)

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This seminar is for maintenance personnel who work with (or around) electric motors. Standard motors and typical motor control circuits are covered. Hands-on exercises allow you to build and troubleshoot circuits using standard industrial components.

You will learn

  1. The different types of single-phase, three-phase and DC motors and how to connect and troubleshoot them.
  2. How to understand and apply motor nameplate information.
  3. How to connect and troubleshoot common motor control circuits.
  4. How to connect and troubleshoot control transformers, fused disconnects and other common components.
  5. How to connect and apply timers to motor control circuits.
  6. How to connect motors using forwarding and reversing circuits.
  7. How to connect multi-speed motors using speed control circuits and variable frequency drives.
  8. How to select and protect motors and motor control circuits.

Who will benefit

  • Electrical maintenance personnel needing to upgrade
  • Mechanical maintenance personnel needing to cross-train
  • Electricians
  • Industrial operators wanting to know more information about the machinery they operate
  • Supervisors and managers responsible for maintenance personnel


  1. Single-Phase Motors
    • Single-phase motors (types and uses)
    • Troubleshooting single-phase motors
  2. Direct Current Motors
    • Direct current motors (types and uses)
    • Troubleshooting direct current motors
  3. Three-Phase Motors
    • Three-phase motors (types and uses)
    • Troubleshooting three-phase motors
  4. Motor Electrical Problems
    • Phase and voltage unbalance
    • Single phasing
    • Improper phase sequence
    • Voltage surges
    • AC voltage and frequency variations
    • Allowable motor starting time
    • Megohmmeter test
  5. Motor Mechanical Problems
    • Heat problems
    • Altitude correction
    • Motor mounting and positioning
    • Loose connections
    • Motor defects
  6. Troubleshooting Motor Control Circuits
  7. Motor Control Devices
    • Motor starters
    • Push-button
    • Selector switches
    • Limit switches
    • Pressure switches
    • Level switches
    • Flow switches
    • Temperature switches
    • Special control switches
  8. Motor Control Circuits
    • Standard push-button circuits
    • Time delayed circuits
    • Reversing circuits
    • Reduced voltage starting
    • Acceleration and decelerating circuits
    • PLC control circuits
    • Adjustable frequency AC drives

In-House Training Available

For additional information about in-house training, please call Amy Murphy at (815) 280-1418 or email