Electrical Motor Protection, Control, Troubleshooting and Maintenance + Maintenance Technologies
Details
It is estimated that electrical drives and other rotating equipment consume about 50% of the total electrical energy consumed in the world today (and this figure increases to 70% if you only consider industry.) The cost of maintaining electrical motor can be a significant amount in the budget item of manufacturing and mining industries. Motor Protection, Control and Maintenance Technologies course gives you a thorough understanding of electrical motor’s protection, control and maintenance and gives you the tools to maintain and troubleshoot electrical motors.You will gain a fundamental understanding of the protection, control and maintenance of electric motors and drives. Typical applications of electric motors in mining, manufacturing, materials handling, process control are covered in detail. The concluding section of the course gives you the fundamental tools in troubleshooting motors confidently and effectively.
YOU WILL LEARN HOW TO:
- Specify protection requirements for motors
- Maintain electrical motor
- Specify speed control requirements for motors
- Understand essentials of motors and drives
- Detail the main issues with testing of motor
- Prevent or at least minimise motor bearing failure
- Troubleshoot and fix faults on motors and drives
- Interface control circuits of motors with PLCs/DCSs
- Reduce downtime on electrical motor
- Improve plant safety
- Improve plant throughput
- Reduce your spares usage and requirements
WHO SHOULD ATTEND
Anyone associated with the use of electrical motors in the industrial or automation environment. The workshop will also benefit those working in system design as well as site commissioning, maintenance and troubleshooting.
Typical personnel who would benefit are:
- Plant Engineers
- Instrument Technicians
- Engineering and design personnel
- Operations personnel
- Electrical Maintenance Technicians
- Instrument and Control Engineers
- Electrical Contractors
- Electrical consulting engineers
- Process control Engineers
- Mechanical Engineers
- Service Technicians
- Maintenance Personnel
Outline
PROGRAMME OUTLINE
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
- 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
- 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
PROTECTION OF MOTORS
- Thermal overload
- Time constraints
- Early relays and new digital relays
- Starting and stalling conditions
- Over Current / Overload
- Under-voltage / Over-voltage
- 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 stabilising 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
- Overall control system
- Power supply for the control system
- Dc Bus charging system
- VSD control loops (Open Loop/Closed loop)
- Vector control
- Current feedback in ac variable speed drives
- Speed feedback from motor
INSTALLATION AND FAULT FINDING
- General installation and environmental requirements
- Power supply connections and earthing
- Where to install contactors in power circuit
- Installation of ac converters into metal enclosures
Schedules
| No. of Days: | 3 |
Citadel for Technological and Engineering Dev. (CITED), a leading organisation in rendering quality service in Corporate Training, Manpower Development and Continued Professional Development (CPD) of Engineers, Technologist and Technicians have been in existence for over twenty years bringing quality service to Nigerians and Nigerian Engineers. Our portfolio of programs is renowned for its breadth and depth of focus, the caliber of its speakers, its interactive, practical and result-orientated nature, and the diverse and national range of participants. It is an excellent networking opportunity.
CITED programs also offer concrete toolkits of effective and practical techniques, strategies and skills to take away. The content continually evolves in response to new business. Our workshops are designed specially for individuals interested in or currently using engineering/technical expertise/skills and technologies to solve their organisation challenges.
