Transformers

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This book covers all the aspects of power transformers-basic fundamentals of theory, design principles, manufacturing technology, materials specifications and standards. It also covers special transformers, including reactors and converter transformers for HVDC systems. The revised edition of the book has been thoroughly updated and includes new chapters on: Controlled shunt reactor Short-circuit testing of transformers Bushings for Transformers RLA and predictive/ preventive maintenance of transformers. With this coverage, the book will serve as an excellent reference book for practising engineers engaged in the design, manufacture, planning, testing, erection, operation and maintenance of transformers. It will also be useful to students and researchers About The Author BHEL, today, is the largest engineering and manufacturing enterprise in India in the energy-related/infrastructure sector. Established more than 40 years ago, it ushered in the indigenous heavy electrical equipment industry in India. Currently, it manufactures over 180 products, under 40 major product groups, and caters to core sectors of the Indian economy, viz. power generation and transmission, industry, transportation, telecommunication, renewable energy, etc. BHEL?s network consists of 14 manufacturing divisions, four power sector regional centres, over 100 project sites, eight service centres and 18 regional offices. BHEL has acquired certifications to Quality Management Systems (ISO 9001), Environmental Management Systems (ISO 14001) and Occupational Health and Safety Management Systems (OHSAS 18001) and is also well on its journey towards Total Quality Management Table Of Contents 1. Introduction 2. Principles of Transformers 3. Materials Used in Transformers 4. Magnetic Circuit 5. Windings and Insulation 6. Voltage Regulation and Tap-changer 7. Electromagnetic Forces in Power Transformers 8. Cooling Arrangements 9. Design Procedure 10. Structural Design of Transformer Tank 11. Transformer Auxiliaries and Oil Preservation Systems 12. Manufacturing and Assembly 13. Drying and Impregnation 14. Testing of Transformers and Reactors 15. Standards on Power Transformers 16. Loading and Life of Transformers 17. Erection and Commissioning 18. Transformer Protection 19. Reactors 20. Traction Transformers 21. Rectifier Transformers 22. Converter Transformers for HVDC Systems 23. Controlled Shunt Reactor 24. Designing and Manufacturing - A Short Circuit Proof Transformer 25. High Voltage Condenser Bushings 26. Computerisation - A Tool to Enhance Engineering Productivity 27. Condition Monitoring, Residual Life Assessment and Refurbishment of