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THE THEORY PERFORMANCE
iii Unbalanced 3phase circuits 10
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0-8 lagging 0-8 power factor 3-phase ampere-turns amperes annum anode armature armature current assumed autotransformer bus-bars cable Calculate capacitance cent of full-load cent overload charges coil conductor connected constant convertor copper loss core cos0 cross-section d.c. voltage diameter efficiency excitation feeder field resistance Final full-load current full-load torque Hence impedance induced e.m.f. induction motor input to rotor insulation iron loss line current load current machine maximum demand maximum torque mercury arc rectifier microfarad mile neutral no-load number of slots ohms overhead line parallel percentage regulation phase angle phase voltage pole per phase power input primary reactance drop reactance per phase Reactive kVA resistance and reactance rotor circuit sending end short-circuit slots per pole star-connected starting torque station stator supply temperature-rise terminal p.d. transmission line unity power factor vector diagram voltage drop volts watts waveform winding