Electrical Motors Testing, Operation, Maintenance, Protection and Troubleshooting Course
Electrical and Power Engineering

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Electrical Motors Testing, Operation, Maintenance, Protection and Troubleshooting Course
Course Overview:
This course encompasses all the work that goes into maintaining, and repairing electric motors and safeguarding them with the end goal of improving efficiency, minimizing breakdowns and ensuring plant security.
Participants will be immersed into AC Motors and Drives By learning about motor construction, speed control, energy efficiency and fault analysis, they acquire both knowledge and skill on motor repair.
Furthermore, the course delves deeper into other more complex topics such as bearing failure analysis, protection techniques, relay settings and AC variable speed drives systems.
This course is tailored for commissioning engineers, maintenance engineers and system design specialists who use electric motors and would like to enhance motor dependability, lower costs, and better the overall performance of the plant.
Course Objectives:
Upon successful completion of this course, the delegates will be able to:
- Apply and gain an in-depth knowledge on electric motor maintenance and troubleshooting ·
- Specify protection requirements for motors and maintain electrical motors ·
- Identify the speed control requirements for motors and discuss the essentials of motors and drives
- Enumerate the main issues with testing of motors to prevent motor bearing failure
- Troubleshoot and fix faults on motors and drives
- Discuss interface control circuits of motors with PLC’s/DCS’s
- Reduce downtime on electrical motors and improve plant safety · Develop plant throughput and reduce spares usage and requirements
Who Should Attend?
This course is valuable for those associated with the use of electrical motors in the industrial or automation environment. This course will also benefit those working in system design as well as site commissioning, maintenance, and troubleshooting.
Course Outlines:
- Introduction, Overview & Discussion of Objectives Fundamentals of Motor Technology and Construction
- Basic Principles of Rotating Electric Machines
- Fundamental Principles of Speed Control
- Efficiency, Torque, Inertia, Horsepower/Power Factor
- Torque-Speed Curves
- Induction/Synchronous/Wound Rotor Types
- Basic Construction and Physical Configuration, Windings
- Principles of Operation and Performance
- Three Phase Ac Induction Motors
- Components
- Theory of Operation
- Induction Motor Design
- Duty Cycles
- Insulation and Cooling Requirements
- Starting Methods Selecting motors T
- Types of Faults, Fault Finding and Testing of AC Machines
- Testing Instrumentation
Energy Losses and Efficiency of Three Phase AC Induction Motors
- Standards
- Types of Losses Tests for Measurement and Computation of Losses and Efficiency
- Dynamometers
- Principles of Load Application By Braking
- Torque Measurement Basics
- Types of Practical Dynamometers
Motor Failure Analysis
- Frequent Starts
- High Inertia
- Inadequate Cooling
- Congestion on Fan Cover
- Improper Spacing at End of Motor
- Incorrect Belt Alignment
- Solid Belt Guards
- Excessive Loading Causing Bearing Clearance Problems
- Insulation Failures
- Bearing Current Problems
- Testing
- Insulation Life and Resistance
- Polarization Index
- DC Hipot
- DC Ramp Test
- AC Hipot
- Capacitance Test
- Dissipation Factor
- Partial Discharge
- Surge Test
- Mechanical Testing
- Online Testing
Bearing Failure Analysis
- Bearing Failures
- Grease and Greasing
- Belt Drive Aspects
- Balance
- Storage Issues
- Service Factor Loading
- Thermal Overload
- Time Constraints
- Early Relays and New Digital Relays
- Starting and Stalling Conditions
- Over Current / Overload
- Under-Voltage / Over-Voltage
- Protection of Motors
Protection of Motors (cont’d)
- Under Frequency
- Pole Slip / Out of Step
- Loss of Excitation
- Inadvertent Energization
- Over Fluxing
- Stall Protection / Acceleration Time / Start Up Supervision /Time Between Starts
- Unbalanced Supply Voltages
- Negative Sequence Currents
- De-Rating Factors
- Earth Faults – Core Balance, Residual Stabilizing Resistors
- Calculation of Protective Relay Settings
- Motor Control
- Power Circuit
- Control Circuit
- Full Online Voltage Starting
- Reduced Voltage Starting: Delta-Star, Resistance, Reactor, Autotransformer, Soft Start
- Braking
- Speed Control
- Reversing
Control System for AC Variable Speed Drives