Power Transformers: Principles and ApplicationsComplete with equations, illustrations, and tables, this book covers the basic theory of electric power transformers, its application to transformer designs, and their application in utility and industrial power systems. The author presents the principles of the two-winding transformer and its connection to polyphase systems, the origins of transformer losses, autotransformers, and three-winding transformers and compares different types of transformer coil and coil construction. He describes the effects of short circuits on transformers, the design and maintenance of ancillary equipment, and preventative and predictive maintenance practices for extending transformer life. |
From inside the book
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Page vi
... units , and analysis of magnetic circuits are discussed with enough mathe- matical rigor for the interested reader to gain full comprehension of the physics involved . Whenever a detailed mathematical treatment is presented , it is al ...
... units , and analysis of magnetic circuits are discussed with enough mathe- matical rigor for the interested reader to gain full comprehension of the physics involved . Whenever a detailed mathematical treatment is presented , it is al ...
Page ix
... Units and Conversion Factors Currents and Magnetic Fields 1 1.4 Magnetic Induction 1.5 Constructing a Simple Transformer 345 1.6 The Magnetic Circuit 1.7 The B - H Curve 1.8 The B - H Curve and Hysteresis 1.9 Magnetizing Currents and ...
... Units and Conversion Factors Currents and Magnetic Fields 1 1.4 Magnetic Induction 1.5 Constructing a Simple Transformer 345 1.6 The Magnetic Circuit 1.7 The B - H Curve 1.8 The B - H Curve and Hysteresis 1.9 Magnetizing Currents and ...
Page 1
... UNITS AND CONVERSION FACTORS The basic operation of all transformers is deeply rooted in electromagnetics , whether or not the transformer has a magnetic iron core . Students are often confused by the terminology used to describe ...
... UNITS AND CONVERSION FACTORS The basic operation of all transformers is deeply rooted in electromagnetics , whether or not the transformer has a magnetic iron core . Students are often confused by the terminology used to describe ...
Page 2
... units with cgs or MKS units . For consistency and ease of understanding , this book will use MKS units throughout the example problems . The fist magnetic quantity is the magnetomotive force ( MMF ) . In elec- trical terms , MMF is ...
... units with cgs or MKS units . For consistency and ease of understanding , this book will use MKS units throughout the example problems . The fist magnetic quantity is the magnetomotive force ( MMF ) . In elec- trical terms , MMF is ...
Page 6
... units of N / A2 . The relative permeabil- ity μ , is the permeability constant divided by the vacuum permeability μ 。. Values of μ , for some common magnetic core materials are as follows : SiFe ( unoriented ) SiFe ( oriented ) 50-50 ...
... units of N / A2 . The relative permeabil- ity μ , is the permeability constant divided by the vacuum permeability μ 。. Values of μ , for some common magnetic core materials are as follows : SiFe ( unoriented ) SiFe ( oriented ) 50-50 ...
Contents
1 | |
2 TwoWinding Transformer Connections | 25 |
3 Transformer Impedance and Losses | 69 |
4 Autotransformers and ThreeWinding Transformers | 117 |
5 Short Circuits Inrush Currents and Other Phenomena | 147 |
6 Ancillary Equipment | 189 |
7 Reading and Applying Nameplate Information | 221 |
8 Maintenance Testing Troubleshooting and Reliability | 235 |
Index | 277 |
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Common terms and phrases
A-connected ampere ampere-turns autotransformer B-H curve bushings calculated clip test common winding conductor cooling class copper losses core and coil core form transformer core leg core losses electrical equal equivalent circuit Example exciting current fault current Filtered oil flux density forces harmonic high-voltage IEEE induced voltages insulation kraft paper KVA base KVA rating load current load tap changer magnetic flux magnetizing current nameplate neutral oil level operating output path phase angle phase rotation phase sequence networks phase-to-ground fault phase-to-neutral phase-to-phase power transformers primary and secondary primary voltage primary winding secondary voltage secondary windings sequence currents series impedance series winding shown in Figure single-phase transformers symmetrical components tap changer terminals tertiary winding test report three-phase three-winding transformer trans transformer connection transformer impedance transformer tank turns ratio two-winding transformer unit vector diagram volt voltage rating voltage surge winding temperature Y-Y connection zero phase sequence zero-sequence