Electrical Motor Installation & Protection


  • Undertake a detailed review of the different types of electric motors available
  • Define motor if the class or not as per nameplate codes
  • Reading Motors Nameplates and understand all items
  • Explosion-proof motors
  • Area classification as per ATEX standard
  • Learn the different starting and control methods used
  • Understand the requirements for electric motors in hazardous areas
  • 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 programmers


  • 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



Day 1: 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
  • Motor losses
  • Motor selections based on load
  • Special Motors (Mill Drives, Gas Turbine Helper Motors, etc.)



Day 2: Electric Motor Control and Hazardous Area Requirements

  • Motor Control Methods and Techniques o DOL
  • Reduced Voltage Start by different techniques
  • Variable Speed Drives
  • PLC controlled
  • Area classification as per ATEX standard
  • EXd and EX ed Motors
  • Motors Classified for use in Hazardous Areas
  • Gland installation and cabling for EX motors


Day 3: Electric Motor Bearings, Efficiency and Harmonics

  • Motor Bearings – Design and Types, Plain, Roller and Sleeve, Lubrication.
  • THD (total harmonic distortion measurements)
  • Explain K factor
  • Power quality improvement to increase efficiency
  • Power factor correction different methods
  • Energy Efficiency of Motors
  • Harmonics in Motors from VSDs or other sources


Day 4: Electric Motor Protection

  • Motor Protection Requirements – General
  • ANSI code for motor protection
  • Using multifunction protection relay
  • 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


Day 5: 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: o Stator Condition
  • Rotor Health
  • Air Gap Anomalies
  • Power Circuit Faults
  • Motor Insulation Health
  • Predictive Maintenance using PD, infrared Camera
  • Cable selection and voltage drop calculation
  • FMEA and RBI
  • Repair or Replacement Decisions, Motor Repair


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