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. |
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Page vi
... loss of life . An entire chapter is devoted to describing abnormal operating conditions that can damage power transformers , including overloads , short circuits , single phasing from primary fuse operations , ferroresonance vi Preface.
... loss of life . An entire chapter is devoted to describing abnormal operating conditions that can damage power transformers , including overloads , short circuits , single phasing from primary fuse operations , ferroresonance vi Preface.
Page x
... Losses 69 3.1 Leakage Flux and Leakage Reactance 69 3.2 Conductor Losses 74 3.3 No - Load Losses 76 3.4 Magnetizing Reactance 79 3.5 Equivalent Circuit of a Two - Winding Transformer 80 3.6 A Brief Tutorial on Symmetrical Components 81 ...
... Losses 69 3.1 Leakage Flux and Leakage Reactance 69 3.2 Conductor Losses 74 3.3 No - Load Losses 76 3.4 Magnetizing Reactance 79 3.5 Equivalent Circuit of a Two - Winding Transformer 80 3.6 A Brief Tutorial on Symmetrical Components 81 ...
Page xi
... Loss of Life References 95 98 99 102 105 116 4 Autotransformers and Three - Winding Transformers 117 4.1 Autotransformer Connections 117 4.2 Impedance of an Autotransformer 122 4.3 4.4 4.5 4.6 Limitations of the Autotransformer ...
... Loss of Life References 95 98 99 102 105 116 4 Autotransformers and Three - Winding Transformers 117 4.1 Autotransformer Connections 117 4.2 Impedance of an Autotransformer 122 4.3 4.4 4.5 4.6 Limitations of the Autotransformer ...
Page 13
... loss , which dissipates as heat in the core . It results from a kind of “ friction " that occurs when the magnetic ... losses in watts for this core . 2 0 H ( amp - turns / m ) 150 = Each of the dashed rectangles shown in Figure 1.9.
... loss , which dissipates as heat in the core . It results from a kind of “ friction " that occurs when the magnetic ... losses in watts for this core . 2 0 H ( amp - turns / m ) 150 = Each of the dashed rectangles shown in Figure 1.9.
Page 14
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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