122 ELECTRICAL ENGINEERING 



The main current 7 has two components, 



1 1 = -|5 , in phase with E, 



Tjl 



and /2 = -y , 90 degrees behind E. 



From the vector diagram 



and lags behind J by an angle <, where 



7 2 #/X R 



The impedance of the circuit is 



E RX 



(8) In Fig. 93 a third branch is connected in parallel with the 



Is 



I 



FIG. 93. 



two in example (7) containing a condensive reactance X e < X. 

 The main current I has three components, 



V 

 Ii = = , in phase with E, 



It 



E 



and 



Z 2 = v? , 90 degrees behind E, 

 JL 



pi 

 It = -y- , 90 degrees ahead of E. 



