## Power Transformers: Principles and Applications (Google eBook)Complete 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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### Contents

III | 1 |

IV | 3 |

V | 4 |

VI | 5 |

VII | 6 |

VIII | 10 |

IX | 11 |

X | 15 |

LVII | 134 |

LVIII | 136 |

LIX | 138 |

LX | 141 |

LXII | 146 |

LXIII | 147 |

LXIV | 148 |

LXV | 155 |

XI | 16 |

XII | 20 |

XIV | 22 |

XV | 24 |

XVI | 25 |

XVII | 26 |

XVIII | 29 |

XIX | 30 |

XX | 33 |

XXI | 36 |

XXII | 40 |

XXIII | 42 |

XXIV | 44 |

XXV | 47 |

XXVI | 48 |

XXVII | 50 |

XXVIII | 51 |

XXIX | 56 |

XXX | 62 |

XXXI | 67 |

XXXII | 69 |

XXXIV | 74 |

XXXV | 76 |

XXXVI | 79 |

XXXVII | 80 |

XXXVIII | 81 |

XXXIX | 85 |

XL | 92 |

XLI | 93 |

XLII | 95 |

XLIII | 98 |

XLIV | 99 |

XLV | 102 |

XLVI | 105 |

XLVII | 116 |

XLVIII | 117 |

L | 122 |

LI | 128 |

LII | 129 |

LIII | 131 |

LV | 132 |

LVI | 133 |

LXVI | 158 |

LXVII | 163 |

LXVIII | 165 |

LXIX | 169 |

LXX | 172 |

LXXI | 175 |

LXXII | 177 |

LXXIII | 187 |

LXXIV | 189 |

LXXVI | 192 |

LXXVII | 196 |

LXXVIII | 201 |

LXXIX | 202 |

LXXX | 204 |

LXXXI | 209 |

LXXXII | 210 |

LXXXIII | 212 |

LXXXIV | 220 |

LXXXV | 221 |

LXXXVII | 223 |

LXXXIX | 224 |

XC | 225 |

XCI | 226 |

XCII | 229 |

XCIV | 230 |

XCV | 231 |

XCVI | 232 |

XCVII | 233 |

XCIX | 235 |

C | 252 |

CIII | 255 |

CIV | 258 |

CV | 261 |

CVI | 265 |

CVII | 268 |

CIX | 269 |

CXI | 271 |

CXII | 273 |

CXIII | 275 |

277 | |

### Common terms and phrases

A-connected ampere ampere-turns autotransformer bushings calculated clip test common winding conductor cooling class copper losses core and coil core form transformer core leg core losses dead band electrical equal equivalent circuit Example exciting current fault current Filtered oil flux density forces high-voltage IEEE induced voltages insulation KVA base KVA rating leakage reactance load current load tap changer magnetic centers 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 sinusoidal symmetrical components tap changer terminals tertiary winding test report three-phase three-winding transformer trans transformer connection transformer impedance transformer tank turns ratio two-phase two-winding transformer unit vector diagram volt voltage rating voltage surge Y-Y connection zero phase sequence zero-sequence