Transformers Operation and Maintenance

At the end of this training seminar, you will learn to:

• Describe the various classifications and types of transformer
• Appreciate the importance of transformer maintenance
• Analyse the various transformer test results
• Classify the transformer cooling methods
• Recognise the merits of transformer designs

CONTENT

Introduction, General Principles and Classification

• General Classification and Types of Transformer
• Transformer Windings, Interconnection of Windings and Tertiary Windings
• Parallel Operation of Transformers and Paralleling Requirements
• Standards for Transformers, Types and Requirements
• Transformer Tappings and Connections
• Ability to Withstand Short Circuit, Impedance Percentage and Sound Level
• Case Studies and Workshop Discussion

Transformer Constructional Details

• Transformer Oil, Characteristics, Oil Oxidation and  Breakdown Voltage
• Effect of Oil Expansion, Breathing Action, Buchholz Relay, Explosion Vents
• Instrument Transformers
• Transformers for Industrial Applications
• Internal and External Cooling of Transformers
• Construction and Details of Transformer Cooling Systems
• Case Studies and Workshop Discussion

Transformer Features and Thermal Performance

• Thermal Performance and Cyclic Rating of Transformers
• Transformer Electromagnetic Forces Radial and Axial
• Transformer Winding and Core Construction
• Transformer Tanks, Radiators and  Tank Losses
• Sound and Noise Levels in Transformers
• Gas Insulated Transformers
• Case Studies and Workshop Discussion

Transformer Operation and Maintenance

• Distribution Voltage Adjustment, Off-load and On-load Tap Changing
• Earth Fault and Over-current Protection of Distribution Transformers
• Transformer Components Maintenance
• Condition based Maintenance for Transformers
• Guidelines on How to Care for your Distribution Transformer
• Remote Monitoring of Transformers
• Case Studies and Workshop Discussion

Transformer Testing and Troubleshooting

• Troubleshooting Transformer Faults
• Site Acceptance Tests
• Transformer Routine Tests
• Measurement of Winding Resistance and Voltage Ratio
• Insulation Resistance Tests
• Manufacturer and Transformer Type Tests
• Partial Discharge Tests and Accuracy of Test Reports
• Wrap-up Session, Questions and Answers

Cooling transformers

• Heat dissipation and load
• Environment & cooling of transformers
• Cooling fluids
• Types of cooling system & notation
• Rated power and cooling system

FOR WHOM:

Works, Services and Maintenance Personnel

TRAINING METHODOLOGY

The training methodology combines lectures, discussions, group exercises and illustrations. Participants will gain both theoretical and practical knowledge of the topics. The emphasis is on the practical application of the topics and as a result participant will go back to the workplace with both the ability and the confidence to apply the techniques learned to their duties.