526 



INDEX 



Vector diagrams, two-wattmeter 

 method of power measure- 

 ment, 90 



Y-connected system, 81, 82 

 Vectors, addition of, 12 



of sine waves by, 19 

 definition of, 12 

 polygon of, 43, 48 

 representation of alternating 



values by, 17 

 subtraction of, 12 

 Vibrating rectifier, 334 

 Volt, definition of alternating- 

 current value, 14 

 Volt-amperes of alternating-current 



circuits, 24 

 Voltage, control of synchronous 



converter, 358 

 polygon of, 43 



ratios in a synchronous con- 

 verter, 345, 346 

 regulation with synchronous 



motor, 326 

 regulator, 161 

 Voltmeter, electro-d ynamometer 



type, 53 



inclined-coil type, 54 

 iron-vane type, 61 



W 



Wagner, Type BA Single-phase 



Induction Motor, 300 

 Type BK Unity Power-factor 



Motor, 304 

 Watthour meter, 63 



adjustment and calibration, 



67 



Wattless component of current, 49 

 Wattmeter, 55 



Wattmeter, calibration, 61 

 connections of, 57 

 polyphase, 59 

 Whole-coil winding, 101 

 Winding of alternators, 100 

 amortisseur, 118 

 barrel, 101, 104 

 chain, 101 



fractional-pitch, 109 

 general principles, 100 

 phasing of, 125 

 single-phase, 101 

 half-coil, 101 

 single-range, 104 

 whole-coil, 101 

 spiral, 101, 103. 

 three-phase, 106 

 two-phase, 104 

 lap, 106 

 two-range, 104 



Wire, table for resistance of, 464 

 Wound-rotor induction motor (see 

 Induction motor), 253 



Y-box for use in power measure- 

 ments, 88 

 Y-connection of three-phase systems, 



80 



line currents, voltages, 81 

 phase currents, voltages, 81 

 power, 82 

 power-factor, 83 

 Y-connection of transformers, 211 



Zig-zag Y-connections of trans- 

 formers, 376 



L FACU 







