328 



ELEMENTS OF ELECTRICAL ENGINEERING. 



Complete wiring diagram of a large alternating-current generat- 

 ing station. In very large alternating-current generating stations 

 a synchronous motor or an induction motor is sometimes installed 

 in preference to a small steam engine for driving auxiliary appa- 

 ratus, and if direct current is needed for local service it is usually 

 supplied by a rotary converter which is driven by the main alter- 



Fig. 279. 



nating-current generators. Thus Fig. 280 is the complete wiring 

 diagram of a power station consisting of a three-phase, alternating- 

 current, steam-turbine driven, 2,3OO-volt, I ,ooo-kilowatt generator 



