INDEX 465 



PAGE 



Transformer, constant-current 301 



construction of 280-288 



danger from a "broken-down" 288 



different types of 280 



effect of magnetic leakage on operation of 187 



effect of secondary current on primary current 275 



e.m.f. in series a-c. motor 358 



exciting current of 273 



instrument 304 



losses occurring in 292 



methods of cooling 289 



principle of operation 273 



ratio of voltages 276 



three phase 308 



welding 304 



Transmission line, place of the transformer in operation of a 278 



superiority of three phase power for a 398 



V curves of a synchronous motor 316 



Vector representation of current and voltage in an a-c. circuit .... 201 



Ventilation, effect of, upon the capacity of a machine 48, 139 



Virtual values of voltage and current 199 



Volt, definition of 9 



Voltage, calculation of generated, of a machine 101 



equality of, between wires of a three-phase circuit 237 



regulator 255 



standard, for c-c. machines 103 



terminal, of a generator 101 



Water cooled transformer 290 



Watt, unit of power, definition of 13 



Watt-hour meter 421 



Wattless component of current and e.m.f 205 



Wattmeter, connection of, for measuring power 208 



rating of 207 



Wave shape 



effect of upper harmonics on 197 



Wave winding 77 



Windage loss in rotating machinery 188 



Winding pitch ^ 



