Electric Motors and Motor Protection in Non-Hazardous and Hazardous Environments


  • Undertake a detailed review the different types of electric motors available
  • Learn the different starting and control methods used
  • Understand the requirements for electric motors in hazardous areas
  • Learn the importance of selecting correct bearings and lubrication systems
  • Understand the types of motor protection required for different motor types
  • Understand the terms “Intelligent Motor Control” and ‘Motor Manager”
  • How they are used to control and automate many motor control functions
  • Learn about comprehensive electric motor maintenance programmes
  • Evaluate whether a motor can be repairs or requires replacement


  • Project Engineers
  • Lead and Senior Design and Support Engineers
  • Electrical Engineers and Designers – Design and Maintenance Operations
  • Electrical Superintendents – Maintenance Operations
  • Facilities Engineers
  • Process and Chemical Engineers
  • Mechanical Engineers
  • Maintenance Technicians


Fundamentals of Electric Motors

  • Introduction to Electrical Motors, Basic Theory and Operation
  • Types of Electric Motors
    • DC
    • AC Synchronous
    • AC Asynchronous
    • Other
  • Commonly used Electric Motors in Industry
    • Cast or Rotor
    • Wound Rotor and Slipring
  • Speed torque curves and motor starting considerations
  • High Voltage Electric Motors
  • Special Motors (Mill Drives, Gas Turbine Helper Motors etc.)

Electric Motor Control and Hazardous Area Requirements

  • Motor Control Methods and Techniques
    • DOL
    • Reduced Voltage Start
    • Variable Speed Drives
  • Hazardous Area Requirements
  • Types of Hazardous Area Classifications
  • Motors Classified for use in Hazardous Areas

Electric Motor Bearings, Efficiency and Harmonics

  • Motor Bearings – Design and Types, Plain, Roller and Sleeve, Lubrication.
  • Motor Shaft Currents and Insulation of Bearings
  • Factors that Limit or Extend Motor Life
  • Energy Efficiency of Motors
  • Harmonics in Motors from VSDs or other sources

Electric Motor Protection

  • Motor Protection Requirements – General
  • Motor Thermal Model Including Overload, Locked Rotor, Often or Prolonged Acceleration and Duty Cycle Requirements
  • Motor Stall, Acceleration and Running Thermal Limit Curves
  • Motor Thermal Capacity and How it is Evaluated in Motor Protection Devices
  • Motor Managers and Intelligent Motor Control

Electric Motor Maintenance and Repair

  • Preventative Maintenance, Corrective Maintenance and Maintenance Planning
  • On-Line Testing of Motors Using Current Signature Analysis can Detect:
    • Rotor defects
    • Stator Problems
    • Bearing Problems
    • Air Gap Problems
  • Off-line Static testing to evaluate:
    • Stator Condition
    • Rotor Health
    • Air Gap Anomalies
    • Power Circuit Faults
    • Motor Insulation Health
  • Predictive Maintenance
  • Vibration Analysis, Thermography and Laser Alignment
  • Repair or Replacement Decisions, Motor Repair

Summary and Discussion


A Certificate of Completion will be issued to those who attend & successfully complete the programme.


  08:30 – 10:15 First Session

 10:15 – 10:30 Coffee Break

10:30 – 12:15 Second Session

 12:15 – 12:30 Coffee Break

12:30 – 14:00 Third Session

 14:00 – 15:00 Lunch

Training Methodology:

This interactive training course includes the following training methodologies as a percentage of the total tuition hours:

  • 30% Lectures, Concepts, Role Play
  • 20% Workshops & Work Presentations, Techniques
  • 20% Based on Case Studies & Practical Exercises
  • 10% Videos, Software & General Discussions
  • 20% Application
  • Pre and Post Test


 The Fee for the seminar, including instruction materials, documentation, lunch, coffee/tea breaks & snack is: