Chapter 12 Transformers 179
12.1 TRANSFORMER THEORY 179
Induction 180
Turns Ratio Principle 181
Transformer Power 183
Transformer Losses 185
Impedance 185
Phase Relationship in Transformers 185
Taps 185
12.2 TYPICAL DISTRIBUTION SYSTEM 186
Applied E&E: Electric Resistance Welding 187
Delta and Wye, Three-Phase Power Systems 188
Grounding 189
Troubleshooting Transformers 190
12.3 SPECIAL TRANSFORMER APPLICATIONS 190
Autotransformers 190
Induction Circuit Breaker 190
Lighting Ballast 191
Coupling Transformer 191
Isolation Transformers 192
Automobile Ignition Coil 192
Chapter 13 AC Motors 195
13.1 INDUCTION MOTORS 195
Synchronous Speed 196
Slip 197
Types of Induction Motors 197
Selsyn Unit 201
13.2 MOTOR PROTECTION, FAILURE, AND
TROUBLESHOOTING 202
Motor Installation and Protection 202
Motor Failure 203
Troubleshooting Motors 203
Section 4 Advanced Electronic Circuits 208
Chapter 14 Inductance and RL Circuits 209
14.1 INDUCTANCE 209
Producing Stronger and Weaker Magnetic Fields 210
Self Induction 210
Transient Responses 210
Experiment 14-1: Self Inductance 212
14.2 MUTUAL INDUCTANCE 213
Phase Relationship in Series and Parallel Inductance 214
14.3 INDUCTANCE IN AC CIRCUITS 215
Induced Current and Voltage 215
Power in Inductive Circuits 216
Resistance and Inductance in an AC Circuit 216
Ohm's Law for AC Circuits 218
Parallel RL Circuit 219
Applied E&E: Inductive Heating 222
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SECTION
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