Electrical Equipment (Transformers, Inverters, Rectifiers, UPS, Circuit Breaker and Fuses): Selection, Application, Operations, Diagnostic Testing, Troubleshooting and Maintenance
Details
DESCRIPTION
Maximum efficiency, reliability, and longevity of electrical equipment such as the various types of motors, variable-speed drives, transformers, generators, rectifiers, inverters, uninterruptible power systems, circuit breakers, and fuses are of great concern
to many industries. These objectives can only be achieved by understanding the characteristics, selection criteria, common problems and repair techniques, preventive and predictive maintenance. This seminar is a MUST for anyone who is involved in the selection,
applications, or maintenance of electrical equipment. It provides the latest in technology. The seminar covers how these equipment operate and provide guidelines and rules that must be followed for a successful operation. Their basic design, operating characteristics,
specification, selection criteria, advanced fault detection techniques, critical components as well as all maintenance issues are covered in detail.
OBJECTIVES
To provide a comprehensive understanding of the various types of motors, variable-speed drives, transformers, generators, rectifiers and inverters, uninterruptible power systems (UPS), circuit breakers, and fuses. Participants will be able to specify, select,
commission and maintain these equipment for their applications.
To achieve reduced capital, operating and maintenance costs along with increase in efficiency.
Outline
PROGRAM OUTLINE
Fundamentals of Electric Systems
Capacitors
Current and Resistance
The Magnetic Field
Faraday’s Law of Induction
Lenz’s Law
Inductance
Alternating Currents
Three-Phase System
Introduction to Machinery Principles
Electric Machines and Transformers
Common Terms and Principles
The Magnetic Field
Magnetic Behavior of Ferromagnetic Materials
Faraday’s Law - Induced Voltage From a Magnetic Field Changing with Time
Core Loss Values
Permanent Magnets
Production of Induced Force on a Wire
Induced Voltage on a Conductor Moving in a Magnetic Field
Transformers
Importance of Transformers
Types and Construction of Transformers
The Ideal Transformer
Impedance Transformation Through a Transformer
Analysis of Circuits Containing Ideal Transformers
Theory of Operation of Real Single-Phase Transformers
The Voltage Ratio Across a Transformer
The Magnetizing Current in a Real Transformer
The Dot Convention
The Equivalent Circuit of a Transformer
The Transformer Voltage Regulation and Efficiency
The Autotransformer
Three-Phase Transformers
Transformer Ratings
AC Machine Fundamentals
The Rotating Magnetic Field
The Induced Voltage in AC Machines
The Induced Torque in a Three-Phase Machine
Winding Insulation in AC Machines
AC Machine Power Flow and Losses
Induction Motors
Induction Motor Construction
Basic Induction Motor Concepts
The Equivalent Circuit of an Induction Motor
Losses and The Power-Flow Diagram
Induction Motor Torque-Speed Characteristics
Control of Motor Characteristics By Squirrel-Cage Rotor Design
Starting Induction Motors
Speed Control of Induction Motors
Speed Control by Changing the Line Frequency
Speed Control by Changing the Line Voltage
Speed Control by Changing the Rotor Resistance
Solid-State Induction Motor Drives
Motor Protection
The Induction Generator
Induction Motor Ratings
Power Electronics, Rectifiers and Pulse-Width Modulation Inverters
Introduction to Power Electronics
Power Electronics Components
Power and Speed Comparison of Power Electronic Components
Basic Rectifier Circuits
Filtering Rectifier Output
Pulse Circuits
A Relaxation Oscillator Using a PNPN Diode
Pulse Synchronisation
Voltage Variation By AC Phase Control
The Effect of Inductive Loads on Phase Angle Control
Inverters
Synchronous Machines
Physical Description
Pole Pitch: Electrical Degrees
Airgap and Magnetic Circuit of a Synchronous Machine
Synchronous Machine Windings
Field Excitation
No-Load and Short-Circuit Values
Torque Tests
Excitation of a Synchronous Machine
Machine Losses
Synchronous Generators
Synchronous Generator Construction
The Speed of Rotation of A Synchronous Generator
The Internal Generated Voltage of a Synchronous Generator
The Equivalent Circuit of a Synchronous Generator
The Phasor Diagram of a Synchronous Generator
Power and Torque in Synchronous Generators
The Synchronous Generator Operating Alone
Parallel Operation of AC Generators
Operation of Generators in Parallel With Large Power Systems
Synchronous Generator Ratings
Synchronous Generator Capability Curves
Short-Time Operation and Service Factor
Generator Components, Auxiliaries and Excitation
Introduction
The Rotor
Turbine-Generator Components: The Stator
Cooling Systems
Shaft Seals and Seal Oil Systems
Stator Winding Water Cooling Systems
Other Cooling Systems
Excitation
The Voltage Regulator
The Power System Stabilizer
Characteristics of Generator Exciter Power Systems (GEP)
Generator Operation
Generator Main Connections
Introduction
Isolated Phase Bus Bar Circulatory Currents
System Description
Performance and Operation of Generators
Generator Systems
Condition Monitoring
Operational Limitations
Fault Conditions
Generator Surveillance and Testing
Generator Operational Checks (Surveillance and Monitoring)
Generator Diagnostic Testing
3.0 Insulation Resistance and Polarization Index
4.0 DC Hipot Test
Partial Discharge Tests
Low Core Flux Test (EL-CID)
Mechanical Tests
Groundwall Insulation
Rotor Winding
Turn Insulation
Slow Wedges and Bracing
Stator and Rotor Cores
Generator Inspection and Maintenance
On-Load Maintenance and Monitoring
Off-Load Maintenance
Generator Testing
Generator Operational Problems, and Refurbishment Options
Typical Generator Operational Problems
Generator Rotor Reliability and Life Expectancy
Generator Rotor Refurbishment
Types of Insulation
Generator Rotor Modifications, Upgrades and Uprates
High Speed Balancing
Flux Probe Test
Circuit Breakers
Theory of Circuit Interruption
2.0 Physics of Arc Phenomena
3.0 Circuit Breaker Rating
4.0 Conventional Circuit Breakers
5.0 Methods for Increasing Arc Resistance
6.0 Plain Break Type
7.0 Magnetic Blow-out Type
Arc Splitter Type
Application
Oil Circuit Breakers
Recent Developments in Circuit Breakers
Fuses
Bearings And Lubrication
Types of Bearings
Statistical Nature of Bearing Life
Materials and Finish
4.0 Sizes of Bearings
5.0 Types of Roller Bearings
6.0 Thrust Bearings
7.0 Lubrication
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.
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