i88 



TRANSFORMERS. 



[Exp. 



i. All the resistance and leakage reactance are considered to 

 be in the primary, as in Figs. 8 and 10. 



-J?,X- 



n 



Load 



HSffi 



FIG. 8. Simplified circuits; R and X all in primary. Corresponds to Fig. 10. 



2. All the resistance and leakage reactance are considered to 

 be in the secondary, as in Figs. 9 and n. 



Each of these simplifications differ very little from the more 

 exact representations already discussed. 



In the actual transformer, as represented in Fig. 6, it is seen 

 that the current which flows through X 2 R 2 is 7 (2) , while a dif- 

 ferent current 7j (slightly larger, due to / ) flows through X^^. 



In the simplifications, the same current is considered to flow 

 through R^X-L and R 2 X 2 which are now combined into a single 



r ^i *Fi- _ j^g._ RS 

 jfiMh-rffl^^ 



Load 



FIG. 9. Simplified circuits; R and X all in secondary. Corresponds to Fig. ix. 



R and X, this current being either I t (as in Fig. 8) or 7 (2) (as 

 in Fig. 9). 



If 7 were zero, Figs. 8 and 9 would not differ from Fig. 6, 

 and all the representations would be identical. In fact, 7 is 

 so small that either simplification and its resultant diagram, Fig. 



