THE POLYPHASE SYSTEM. 



107 



give an approximately balanced system. Polyphase systems are 

 in fact nearly always arranged with the idea of delivering currents 

 to balanced receiving circuits. 



main 1 



main 2 



-'0000000000 



Fig. 101. 



(b) For similar receiving circuits (balanced system). In this 

 case the receiving circuits may be connected to three-wire three- 

 phase mains according to the Y -scheme as shown by Fig. 101, 



, main 1 



main 3 



Fig. 102. 



or according to the A-scheme as shown by Fig. 102, and either 

 scheme may be employed irrespective of the manner in which the 

 armature windings of the generator are connected. 



