THE REGULATION OF TRANSFORMERS 109 



We thus ..Main .1 E Wt which represents the drop. It will at 

 once he obvious that the points E w , 30, etc., will lie upon the 

 .in umference of a circle whose diameter is equal to A C (/.., 

 t. tin- imprdance drop), and whose centre lies midway between 

 .1 and C. The drop at various angles of lag will be ivi 

 ted l'\ the chords A /,'u,, .1 /VM, etc., of this circle. Com- 



Ql 0.2 0.3 0.4 Q5 Q6 Qf CfQ O.9- /.O 

 /o~er factor of Extern*/* Lead 



<J8. Rcgul.it i< in mm- <.f L''i-kv:i :' 



'his diagram with that in I-'i.L'. '' it will be observrd 

 more ina.Tiinite at hi-h and low 

 power factors of the external circuit, and tha: 



l-S of 0,5 and O.li;, ( f,,r tin- parti. -nlar fXaiiii-lr tak. n i. tli.- 



Curacy is very small. 1 h. results obtained respectively 



from Figs. Ml and (\7 are compai-.-d in the curves in Fig. 68, 



the broken line curve representing the results obtain..! iV..m 



th- full line curvr tin- i r ^nlt- ..l.taincd 



by means of Fig. 66. Ti . mtrodur..! l.y l-'i-. f . '-7 



will be sinall- i- tli.- small* r the resistance <lr>p and the 



l> are as compared with thr terminal pressure. 



