Electric Motor Testing, Operation, Maintenance, Protection and Troubleshooting
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Electric Motor Testing, Operation, Maintenance, Protection and Troubleshooting Course
Introduction:
Estimations suggest that electrical drives and other rotating equipment account for approximately 50% of the global electrical energy consumption (which increases to 70% when considering the industrial sector alone). The maintenance cost associated with electrical motors can be a significant portion of the budget for manufacturing and mining industries. This course provides participants with an extensive comprehension of electrical motor protection, control, and maintenance, equipping them with the necessary tools to effectively maintain and troubleshoot electrical motors.
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