108 



ALTERNATING ci'lfltENTS 



sary to carry a considerable variety of spares. The connections 

 of the coils of phase B only are shown, the other phases being con- 

 nected in a similar manner. 



Phased 

 Phased Phase C 



fr| p=f ]=7 



d' 



FIG. 110. Three-phase chain winding, requiring special coils. 



Figure 111 shows a three-phase, full-pitch, lap winding, in 

 which there are 12 slots per pole. The coil pitch is therefore 

 equal to 12. For clearness the connections of the A phase alone 



FIG. 111. Three-phase, full pitch, 2-layer, lap winding. 



are shown, the connections of the B and C phases being similar. 

 It will be observed that in this type of winding the two coil sides 

 in any one slot belong to the same phase. 



Figure 112 is similar to Fig. Ill, except that the winding is 



