Testing and Maintenance of Power Transformers (11/0.4 kV)

Day 1: Introduction to Power Transformers

• Overview of transformer types and applications.

• Structure and components of 11/0.4 kV transformers.

• Transformer ratings and specifications.

Day 2: Transformer Operating Principles

• Basics of electromagnetic induction and transformer operation.

• Load characteristics and efficiency considerations.

• Cooling methods and their importance.

Day 3: Testing Fundamentals

• Importance of testing in transformer lifecycle.

• Key testing parameters: voltage ratio, insulation resistance, winding resistance.

• Introduction to testing equipment and tools.

Day 4: Routine Testing Procedures

• Transformer oil testing: dielectric strength, moisture analysis.

• Insulation resistance testing using a megger.

• Voltage ratio and polarity testing.

Day 5: Advanced Diagnostic Testing

• Sweep Frequency Response Analysis (SFRA).

• Partial Discharge (PD) testing techniques.

• Dissolved Gas Analysis (DGA) for fault diagnosis.

Day 6: Maintenance Practices

• Preventive maintenance schedules and checklists.

• Cleaning, tightening, and inspection of components.

• Importance of cooling system maintenance.

Day 7: Fault Identification and Troubleshooting

• Common transformer faults: overheating, short circuits, winding issues.

• Diagnostic approaches for identifying faults.

• Repair vs. replacement decisions.

Day 8: Transformer Safety and Compliance

• International standards (IEC, IEEE) for transformer testing and maintenance.

• Safety protocols during testing and maintenance activities.

• Case studies of safety incidents and lessons learned.

Day 9: Case Studies and Practical Applications

• Analysis of transformer failures and preventive measures.

• Hands-on testing and maintenance exercises in a controlled environment.

• Real-world examples of maintenance strategies.

Day 10: Future Trends and Innovations

• Smart transformers and IoT integration in testing.

• Condition monitoring systems for predictive maintenance.

• Energy-efficient transformer technologies.