INDEX. 



Transformer, separation of hysteresis 

 and eddy current losses in, 175 



series, 131 



short-circuit test, 160 



step-up and step-down, 128 



systems of polyphase connections, 

 210 



T-connection of, 243 



test by the method of losses, 

 150-178 



total voltage drop in, 194 



tub type, 131 



types of, 130 



variation of core losses in, 

 156-158, 173-176 



voltage and current transforma- 

 tion, 128 



volts per turn, 141 



weight of copper and iron in, 141 

 Transmission lines, regulation of, 101 

 Two-phase system, 196 



laboratory supply, 201 



power factor, 225 



transformation to 3-phase, 243 



transformation to 6-phase, 248 



Unipolar dynamo, 2 



Variable speed induction motors, 276 

 V-Connection, of 3-phase circuits, 



197, 209 

 of auto-transformers for starting 



motors, 248 



V-curves, of synchronous motor, 314 

 Vectors, addition and subtraction of, 



213-216 



direction of rotation of, 105 

 for representing admittances, 118 

 for representing currents and 



electromotive forces, 105 

 for representing impedance, re- 

 sistance and reactance, 109 

 for representing non-harmonic 

 quantities, 122 



Vectors, relative accuracy when ap- 

 plied to inductive and capacity 

 circuits, 122 

 significance of 105 

 Voltage adjustment, 10 

 Voltage ratio of converters, 322 

 Voltage per phase, 212 

 Voltmeters, damage due to induced 



electromotive force, 12 

 methods of connecting when used 



with a wattmeter, 148 

 multipliers for, 149 

 power consumed in, 148 



Waters, W. L., on induction genera- 

 tors, 298 



Wattless current, 115 

 Wattless power, 107 

 Wattmeters, correction for power 



consumed in instrument, 151 

 errors in, 146-149 

 multipliers for, 149 

 n wattmeter method of measuring 



power, 228, 240 



n-i wattmeter method of meas- 

 uring power, 226, 240 

 negative reading of, in 3-phase 



power measurements, 233 

 one wattmeter methods of meas- 

 uring 3-phase power, 233 

 polyphase, 229 



two wattmeter method of meas- 

 uring power, 228 

 Wave analysis, 331 

 Wave winding, 3 

 Welding, electrolytic, 347 

 Whitehead and Grondall, on synchro- 

 nous commutators, 3224 

 Woodbridge, on converters, 211 

 Workman, on motor testing, 56, 61 



Y-connected, see Star-connected 



