Course Details

Objective

By the end of the course, participants will be able to understand

• Understand the basic working principles of power transformers.
• Identify different types of power transformers and their applications.
• Learn the main components of a power transformer and their functions.
• Understand the design features of transformers and the role of oil and insulation in transformer performance.
• Identify common issues and faults in transformers and how to troubleshoot them.
• Learn preventive maintenance techniques to prolong the life of transformers.
• Understand transformer testing procedures and safety precautions.
• Apply the knowledge of transformers in real-world operational contexts.

Content

Day 1: Introduction to Power Transformers

• Overview of electrical power transmission and distribution systems.
• Importance of transformers in electrical power systems.
• Basic transformer theory: Electromagnetic induction and voltage transformation.
• Understanding transformer ratings: Voltage, current, power, and impedance.
• Types of transformers: Power transformers, distribution transformers, auto-transformers, and others.
• Common transformer applications in industry and power systems.
• Transformer terminology and specifications.

Day 2: Transformer Construction and Components

• Transformer core and windings: Function, materials, and design.
• Insulating materials: Types of oil, paper insulation, and other materials used in transformers.
• Transformer tank and cooling systems: Purpose of oil, air cooling, and radiator systems.
• Bushing, tap changer, and bushings: Components that connect the transformer to the circuit.
• Importance of tap-changing and voltage regulation in power transformers.
• Transformer protection devices: Pressure relief valves, Buchholz relays, and temperature indicators.

Day 3: Transformer Operation and Efficiency

• Basic operation principles: Primary and secondary windings, voltage and current ratios.
• Load management and regulation in transformers: The role of tap changers and voltage regulation.
• Losses in transformers: Core losses, copper losses, and their impact on efficiency.
• Transformer efficiency and capacity: Calculating losses and understanding operational limits.
• Transformer no-load and full-load conditions: How transformers behave under different operational loads.
• Factors affecting transformer efficiency: Design, load factors, and environmental conditions.
• Troubleshooting basic operational issues: No-load, short-circuit tests, and their diagnostic value.

Day 4: Maintenance and Testing of Power Transformers

• Preventive maintenance: Inspection routines, oil sampling, and condition monitoring.
• Testing methods: Insulation resistance tests, turns ratio tests, and impedance tests.
• Understanding Buchholz relay and protection features in transformer operation.
• Importance of oil sampling and diagnostic tests: Dissolved gas analysis (DGA), moisture content, and dielectric strength.
• Fault detection and diagnosis in transformers: Common problems like overheating, oil leaks, and winding failures.

Day 5: Safety, Troubleshooting, and Industry Best Practices

• Electrical safety practices when working with power transformers: Lockout/tagout procedures, high-voltage precautions, and PPE.
• Transformer fault diagnosis: Common faults such as winding short circuits, core issues, and oil contamination.
• Understanding transformer protection schemes: Overcurrent protection, differential protection, and thermal overload.
• Industry standards for transformers: IEC, ANSI, and IEEE transformer standards.
• Review of operational procedures and best practices in transformer installation, operation, and maintenance.

NOTE:

Pre-& Post Tests will be conducted.

Case Studies, Group Exercises, Group Discussions, Last Day reviews, and assessments will be carried out.

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Methodology

A highly interactive combination of lectures and discussion sessions will be managed to maximize the amount and quality of information and knowledge transfer. The sessions will start by raising the most relevant questions and motivating everybody to find the right answers. You will also be encouraged to raise your questions and to share in the development of the right answers using your analysis and experiences.  Tests of the multiple-choice type will be made available daily to examine the effectiveness of delivering the course.

Very useful Course Materials will be given.

• 30% Lectures
• 30% Workshops and work presentation
• 20% Group Work& Practical Exercises
• 20% Videos& General Discussions