INDEX. 



Abhenry, definition of, 356 

 Admittance of an alternating-current cir- 

 cuit, definition of, 70, 91 

 Alternating current, 2 



advantages of, 14 



and direct current calculations 



contrasted, 19 

 curves, 24, 35 

 lighting, 16 

 measurements, 38 

 motors, 1 6, 17 

 electromotive force, 2 



average values and effective 



values of, 30 

 curves, 24, 35 

 Alternation current, conversion of, into 



direct current, 17 



Alternator, electromotive force of, 117 

 field excitation of, 10 

 power delivered by, 32 

 saturation curve of, 132 

 synchronous reactance curve of, 133 

 the, I 



the composite, 12 

 the single-phase, 98 

 the three-phase, 101 

 the two-phase, 98 

 voltage regulation of, 117 

 Alternators in parallel, 141, 159 

 power rating of, 139 

 single-phase and polyphase, 8 

 Ammeters for alternating currents, 38 

 Armature reaction of the alternator, 137 

 windings, concentrated, 9 



distributed, 9 

 Autotransformer, the, 219 

 Average values and effective values of 

 harmonic electromotive forces 

 and currents, 60 

 of alternating electromotive 

 forces and currents, 30 



Balanced polyphase system, no 

 Bedell and Crehore, Alternating Cur- 

 rents, 73 

 Bus-bars, 322 

 Buses, synchronizing, 322 



Capacity and inductance, 354 



concentrated, 21 



distributed, 21 



electrostatic, 365 



units of, 366 



Charge, electric, definition of, 362 

 Choice of signs in complicated networks, 



104 

 Circle diagram of the induction motor, 278 



of the transformer, 248 

 Coils in parallel, 86, 95 



in series, 93 



Compensated voltmeter, the, 338 

 Compensator, the starting, 267 

 Complex quantity, use of, 88 

 Composite alternator, the, 12 

 Composition and resolution of harmonic 



electromotive forces and currents, 55 

 Commutator rectifier, the, 12 

 Concentrated armature windings, 9 



capacity and distributed capacity, 21 

 Condenser, the, 365 

 Conductance of an alternating-current 



circuit, definition of, 70, 91 

 Constant current transformer, the, 215 

 Conversion of alternating current into 



direct current, 17, 170 

 Copper economy of two-phase and three- 

 phase transmission lines, 115 



loss in transformers, 2 1 1 

 Core losses in transformers, 211 

 Core-type transformers, 198 

 Current and electromotive force curves, 

 examples of, 79, 81 



curves, 24, 35 



409 



