course | Transformer Operational Principles Troubleshooting Training

Module (01): Introduction, General Principles, and Classification
 

• General Classification of Transformers:
• Transformer Construction, Core-Type,
• Shell-Type, Dry-type Transformers,
• Oil-filled Transformers,
• Cooling Techniques
• Transformer Windings
• Interconnection of Windings
• Advantages and Disadvantages of Principal Connections.
• Tertiary Windings
• Autotransformers
• Harmonics in Transformers
• Parallel Operation of Transformers
• Loadings of Transformers in Parallel
• Paralleling Requirements
• Polarity
• Standards for Transformers, Types and Requirements
• Transformer Tappings and Connections
• Ability to withstand Short Circuit, Sound Level
• Case Studies and Workshop Discussion

Module (02): Transformer Constructional Details
 

• Transformer Oil:
• Characteristics
• Oil Oxidation
• Breakdown Voltage
• Water Content
• Acidity
• Oil and Field Oil Testing
• Dissolved Gas Analysis
• Treatment and Filtering of Oil
• Effect of Oil Expansion
• Breathing Action
• Buchholz Relay
• Explosion Vents
• Instrument Transformers
• Transformers for Industrial Applications:
• Electro-chemical,
• Arc and Induction Furnaces,
• Rectifier Transformers,
• High Voltage Testing Transformers,
• Precipitator Transformers,
• Dry Type Transformers
• Transformer Construction & Details
• Transformer Cooling
• Natural Cooling
• Forced Cooling
• Case Studies and Workshop Discussion

Module (03): Transformer Features And Thermal Performance
 

• Thermal Performance and Cyclic Rating of Transformers
• Transformer Impedance
• Electromagnetic Forces
• Transformer Construction
• Transformer Windings Construction
• Coil Types
• Disc Coils
• Cross-over Coils
• Concentric Coils
• Sandwich Coils
• Transpositions
• Transformer Tanks and Radiators, Tank Losses, Paint Treatments
• Transformer Fittings
• Lifting Lugs
• Undercarriages
• Jacking Pads
• Tie-Down Lugs
• Bleed Pipes
• Thermometers
• Case Studies and Workshop Discussion

Module (04): Transformer Operation And Maintenance
 

• Distribution Voltage Adjustment, Off-Load Tap Changing, On-Load Tap Changing
• Switching of high voltage underground cables supplying the Distribution Transformers
• Earthling and Over-Current Protection of Distribution Transformers
• Transformer Maintenance:
• Oil preservation
• Deterioration of oil
• Breathers
• Condition Monitoring
• Faults in Transformers
• Tappings and Windings
• Advanced Transformer Maintenance
• Guidelines on how to care for your Distribution Transformer
• Case Studies and Workshop Discussion

Module (05): Transformer Testing
 

• Transformer Routine Tests
• Measurement of winding resistance
• Measurement of voltage ratio
• Measurement of impedance voltage, short-circuit impedance, and load loss
• Measurement of No-load loss and current
• Insulation resistance
• Harmonics testing
• Separate-source power-frequency voltage withstand test
• Induced overvoltage withstand test
• Transformer Type Tests
• Temperature–rise test
• Lightning impulse test
• Sound level
• Special Tests
• Transformer Partial Discharge Testing
• Accuracy and Interpretation of test results and of test reports
• Workshop and Tutorials
• Questions and Case Studies