About half of the electrical energy used worldwide today is thought to be used by electrical drives and other rotating machinery. The maintenance of electrical motors can account for a sizeable portion of the manufacturing and mining sectors' budgets. You will leave this five-day course with a comprehensive understanding of electrical motor operation, maintenance, and failure modes in addition to the skills needed to maintain and diagnose them.

Course Objectives:

This course is designed to enable participants to:

Understand AC motor operation and construction.
Overview of different types of motor duties.
Read & explain the motor NP data.
Motor de-rating factors.
Specify, select, and install motors.
Specify speed control requirements for motors.
Interpret motor performance curves
Electrical motors in the Hazardous area.
Install and commission motors
Fix faults on motors.
Specify protection requirements for HV motors.

Who Should Attend?

The workshop will also benefit those working in system design as well as site commissioning, maintenance, and troubleshooting. Typical personnel who would benefit are:

Project Engineers.
Design & Protection Engineers.
Operations Personnel.
Electrical Maintenance Supervisors & Senior Technicians.
Maintenance Personnel.

Course Outlines:

Review of Fundamentals/Basics

Resistors, Ohm’s Law, Capacitors, dielectrics, magnetic field, Ampere's law, Faraday's law, inductance, and alternating currents.

Introduction to Different Types of Electric Motors

DC motors.
AC motors (1-Ph & 3-Ph).
Induction Motors.
Synchronous motors.
International Codes and Standards.

Fundamentals of Motor Technology

Basic construction and physical configuration, windings.
Principles of operation and performance.
How the motor produces torque.
Theory of operation.
Basic principles of rotating electric machines.
Fundamental principles of speed control.
Efficiency, torque, inertia, horsepower/power factor.
Torque-speed curves.
Motor Losses & Efficiency.
Induction motor design.
Duty cycles.
Insulation and Cooling requirements.
Selecting motors.
Classified Ex motors.
De-rating Factors (Temperature, altitude, …etc.)
Voltage unbalance.
Power Factor Improvement.

Condition Monitoring and Diagnostics

Partial Discharge
Insulation Resistance Monitoring
Correction for Winding Temperature
Insulation Contamination
IR Test Connections
Typical IR Testing Program
DC HI-POT TEST
Maximum Allowable Test Voltage
Measuring Insulation Degradation
Capacitive Charging Current
Resistive Leakage Current
Insulation Power Factor
Insulation Power Factor Standards
Power Factor Test Sets
Outage for Scheduled Maintenance
On-Line Measuring Partial Discharge Activity (PDA) For Insulation
Motor Current Signature Analysis (MCSA)

Maintenance of HT Induction Motors

Maintenance Requirements
Cleaning Motors
Care of Stator Windings
Care of Rotor Winding
Motor Shaft Currents
Inspecting Motor Bearings.
Different Electrical Testing.
Electrical Preventive Maintenance Work Instructions.
Troubleshooting Electric Motors.
Motor Failures
Insulation failure
Over-current/overloading
Cable box failure
Rotor burnout
Bearings
Vibration
Induction Motors Troubleshooting Guide
Motors and Electrical safety

HT Motor Protection

Introduction
Motor characteristics involved in protection
General motor protection
Phase Fault Protection
Differential Protection
Ground-Fault Protection
Thermal And Locked-Rotor Protection
Locked-Rotor Protection For Large Motors (21)
System Unbalance And Motors
Unbalance And Phase Rotation Protection
Under-voltage Protection
Repetitive Starts And Jogging Protection

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