| Description |
1 online resource (xviii, 614 pages) : illustrations, figures, tables |
| Contents |
Foreword -- F. Preface to the second edition -- G. Preface to the first edition -- H. Acknowledgements -- I. Editorial committee -- 1. Introduction -- 2. Principles of transformers -- Working principle of a transformer -- Elementary theory of an ideal transformer -- Emf equation of a transformer -- Voltage transformation ratio (k) -- Ideal transformer -- Transformer having winding resistance but no magnetic leakage -- Magnetic leakage -- Transformer with resistance and leakage reactance -- Equivalent circuit -- Regulation -- Losses in transformers -- Efficiency -- The auto-transformer -- Three-winding transformer -- Parallel operations of transformers -- Appendix -- References -- 3. Materials used in transformers -- Insulating oil -- Insulating paper -- Pressboard -- Wood -- Insulated copper conductor for windings -- Crepe paper covered flexible copper cable -- Sealing materials -- Cold rolled grain-oriented electrical steel sheet (crgo) -- Structural steel -- Future trends -- References -- 4. Magnetic circuit -- Material -- Design of magnetic circuit -- Optimum design of core -- Manufacturing -- References -- 5. Windings and insulation -- Types of windings -- Surge voltage behaviour of windings -- Internal heat transfer in windings -- Insulation design -- Electric field plotting -- Finite difference method (fdm) -- References -- 6. Voltage regulation and tapchanger -- Off-circuit tapchanger -- On-load tapchanger (oltc) -- Constructional and operational features of oltc -- Manual and electrical operation of tapchanger -- Automatic control of tapchanger -- Tapchanger selection -- Latest trends in tapchanger design -- Reference -- 7. Electromagnetic forces in power transformers -- Leakage flux in a typical two winding transformer -- Nature of forces -- Basic formula and methods for force evaluation -- Radial forces -- Axial forces -- Roth's method of force calculation -- Modes of failure of windings and design of windings -- Strengthening of coils to withstand short-circuit forces -- Design of clamping structures -- List of symbols -- References -- 8. Cooling arrangements -- Various types of cooling -- Cooling arrangements -- Propeller type fans -- Transformer oil pump -- Flow indicators -- Stress and hydraulic analysis of pipework -- 9. Design procedure -- Specifications of a transformer -- Selection of core diameter -- Selection of flux density -- Selection of type of core -- Selection of leg length -- Selection of type of windings -- Selection of tapchanger -- Calculation of number of turns -- Selection of conductor and current density -- Insulation design -- Calculation of lateral and axial dimensions of coils -- Ampere-turn balancing -- Reactance calculation -- Iron weight and losses -- Copper weight and losses -- Stray losses in transformer -- Stray loss control -- Impulse calculation -- Mechanical forces in windings -- Temperature gradient and cooling calculation -- Typical design calculations for two winding and auto-transformers -- References |
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10. Structural design of transformer tank -- Types of tank constructions -- Structural design of transformer tanks -- Testing of tanks -- References -- 11. Transformer auxiliaries and oil preservation systems -- Gas operated (buchholz) relay -- Temperature indicators -- Pressure relief valve -- Oil level indicator -- Bushing and cable sealing box -- Silicagel breather -- Gas sealed conservators -- Thermosyphon filters -- Bellows and diaphragm sealed conservators -- Refrigeration breathers -- 12. Manufacturing and assembly -- Core building -- Preparation of windings -- Winding assembly -- Core and winding assembly -- Terminal gear assembly -- Placement of core and winding assembly in tank -- Processing -- Servicing of transformer -- Tanking -- 13. Drying and impregnation -- Basic principles of drying -- Conventional vacuum drying -- Vapour phase drying -- References -- 14. Testing of transformers and reactors -- Testing of power transformers -- Impulse testing -- References -- Partial discharge testing -- References -- Testing of reactors -- References -- Short-circuit testing of power transformers -- 15. Standards on power transformers -- First revision of is: 2026 -- Other related standards -- New standards -- Standard specification of a power transformer -- Appendix i -- I. Indian standards related to power transformers -- Ii. Iec publications -- 16. Loading and life of transformers -- Life of a transformer -- Ageing of insulation -- Law of insulation ageing -- Significance of weighted value of ambient temperature -- Relationship between weighted ambient, winding rise and hot-spot temperatures -- Determination of weighted ambient temperature -- Relationship between weighted ambient and load -- Alternative approach for the calculation of weighted ambient -- Transformer loading guides -- Loading by hot-spot temperature measured by wti -- Selection and use of a transformer -- References -- Annexure i correction factors -- Annexure ii -- Annexure iii loading table transformers onan/onaf cooled (to is : 2026) -- 17. Erection and commissioning -- Despatch -- Inspection upon arrival at site -- Handling -- Installation -- Commissioning -- Maintenance -- Dos for power transformer -- Don'ts for power transformers -- Dos and don'ts for hv condenser bushings -- 18. Transformer protection -- Protection against external faults -- Protection against internal faults -- References -- 19. Reactors -- Series reactors -- Shunt reactor -- Neutral earthing reactor -- Tuning for filter reactors -- Arc suppression reactors -- Earthing transformers (neutral couplers) -- Standards on reactors -- 20. Traction transformers -- Types of traction transformers -- Special considerations -- Design and constructional features -- Traction transformer for thyristor controlled locomotives -- References -- 21. Rectifier transformers -- Comparison between rectifier transformer and power transformer -- Rectifier circuits -- Design features of rectifier transformers -- Transductors -- Constructional features of rectifier transformers Tank design -- Testing -- References |
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22. Convertor transformers for hvdc systems -- Insulation design -- Higher harmonic currents -- Dc magnetization -- Dc bushings -- On load tapchanger -- Influence of impedance variation -- Connections -- Specifications -- Manufacturing features -- Tests -- References -- 23. Controlled shunt reactor -- Controlled shunt reactor (csr) principle -- Controlled shunt reactor transformer (csrt) -- Special features of the controlled shunt reactor transformer -- Controlled shunt reactor much more than a shunt reactor -- Conclusion -- References -- 24. Designing and manufacturing -- a short-circuit proof transformer -- Forces during short-circuit -- Various considerations to design a transformer suitable for short-circuit duty -- Manufacturing aspects -- Quality aspects -- Conclusion -- 25. High voltage condenser bushings -- Introduction -- Classification of bushings -- Design of bushing -- Constructional details and main parts of bushing -- Testing of bushing -- Factors affecting the performance of bushing -- Condition monitoring at site -- Dos and do nots for hv condenser bushings -- 26. Computerisation -- a tool to enhance engineering productivity -- 27. Condition monitoring, residual life assessment and refurbishment of transformers -- Analysis method -- Physical inspection -- Residual life assessment (rla) -- Different techniques for life estimation -- Methodology adopted -- Conventional and special tests on oil samples -- Refurbishment -- Conclusion -- Annexure i format for data collection history of transformer -- 28. Transformers: an overview -- A. Solved examples |
| Bibliography |
Includes bibliographical references and indexes |
| Notes |
Cover image and table of contents, viewed on Sep. 18, 2014 |
| Subject |
Electric transformers.
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Electric motor industry.
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Electric reactors, Shunt.
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transformers.
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Electric motor industry
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Electric reactors, Shunt
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Electric transformers
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| Form |
Electronic book
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