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Introduction and Chapter Objectives
Test Your Knowledge
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3-phase ac voltage angle apparent power armature autotransformer Calculate capacitance capacitor Chapter circuit breakers coil commutator composed conductor Consequently contactor Courtesy current flow curve dc excitation dc motor dc source decreases electric electrons energy equation Example Figure force frequency full-load hysteresis impedance increases induced voltage induction motor inductor insulation kvar lags line current line voltage load locked-rotor torque magnetic domains magnetic field magnitude maximum mechanical meters negative no-load number of poles operate output peak value percent permanent magnet phase phasor phasor diagram plate polarity positive power factor primary produces r/min rate of change reactance reactive power relay resistance resistor rheostat rotation short-circuit shown in Fig shows shunt single-phase sinusoidal squirrel-cage starter stator stepper motors synchronous machine synchronous motor synchronous speed temperature terminals three-phase three-phase line torque torque-speed transformer transmission line turbine turns voltage and current voltage induced wattmeter wire zero