INDEX 



357 



Residual magnetism, effect on picking 



up of shunt machine, 15 

 Resistance, 109, 115 

 Resistance drop, in alternators, 66 



73, 76, 79, 80, 81-83, 86 

 in generators, 8, 19, 24 

 Resistance drop, in motors, 29, 31 

 in polyphase systems, 202 

 in transformers, 129, 162, 165, 



168-169, 185 

 Resistance measurements, by fall-of- 



potential method, n 

 by substitution, 12 

 Resonance, current, 121 



voltage, i2i 

 Reversing motor, 346 

 Revolving armature, 2, 63 

 Revolving field, 2, 63, 258, 276 

 Ring connected 2-phase system, 196 

 Robinson, L. T., on electric meas- 

 urements with current and poten- 

 tial transformers, 149 

 Roessler, on form factor, 146 



on influence of form factor on 



iron losses, 176 

 Rotary converter, see Synchronous 



converter, 



Rotation losses, 47, 50, 60 

 Rotor, 257 

 Rowe and Hellmend, on induction 



motors, 288 



Runge, C, on wave analysis, 339 

 Rushmore, D. B., on regulation of 



alternators, 91, 100 

 on revolving field alternators, 63 

 Ryan, H. J., on compensated wind- 

 ings, 33 

 on synchronous motors, 316 



Saturation, effect of, on compound- 

 ing, 13, 14 



effect of, on regulation of com- 

 pound generator, 22 

 effect of, on regulation of shunt 



generator, 20 

 effect of, on series characteristic, 



7 

 effect of, on speed of series 



motor, 40 



Saturation curve, 14 

 Saturation factor, 16 

 Scott, C. F., on two- to three-phase 



transformation, 243 

 Secondary losses, in induction motors, 



274 



Secondary resistance, for starting in- 

 duction motors, 262, 265 



Separation of losses, in generators 



and motors, 50-54 

 in transformers, 175-176 

 Series A. C. circuits, 102-122 

 Series A. C. motors, best frequency 



for, 64 

 Series characteristic of compound 



generators, see Characteristics 

 Series generators, 1-12 

 armature reactions, 6 

 brush position, 6 



characteristics of, see Character- 

 istics 

 uses of, 4 



Series motors, 4, 39-40, 60-6 1 

 Series turns, determination of, 24-26 

 Shading coils, for starting single- 

 phase motors, 263 

 Sheldon, Mason and Hausman, on 



synchronous motor, 319 

 Short shunt connected generator, 21 

 Shunt generators, 13-20 



armature reactions in, 19 

 characteristics of, see Character- 

 istics 



compounding of, 23-24, 26 

 direction of rotation of, 15 

 efficiency of, 41-59 

 regulation of, 19, 20 

 uses of, 4, 13 

 Shunt motors, 27-61 



armature reactions in, 31-32 

 brush position of, 31-32 

 efficiency of, 4146' 

 operation of, 27-40 

 speed characteristics of, 37-40 

 speed control of, 32-84 

 stopping of, 34 



Shunt turns, determination of, 25 

 Sine method, of measuring power fac- 

 tor, 226, 237 



Single-phase currents, 102-122 

 Single-phase induction motors, 262, 



276 



starting as repulsion motor, 263 

 starting with phase splitter, 264 



266 



starting with shading coils, 263 

 Six-phase circuits, 210-211 

 Slip, in induction motors, 259, 274, 



295 



Smith, S. P., on alternator regula- 

 tion, 99 



Space degrees, 106 

 Sparking at brushes, 6, 22 

 Specht, H. C., on circle diagram for 

 induction motors, 289 



