TRANSMISSION LINE 409 



Capacity of each conductor to neutral is 



C = ^SX 77 = 1.26 X 10-' farads. 



= 2135 hms ' 



The capacity reactance is 



1 10 6 



c 2rfC 2 X 3.14 X 60 X 1.26 



and the capacity susceptance is 



The charging current per conductor is 

 60,000 



Ic = i = ~2it = 16 - 23 amperes > 



and the kv.a. required to charge the line is 



= 1690. 



The charging current and charging kv.a. have been taken as pro- 

 portional to the voltage at the receiving end of the line which 

 gives values slightly less than the true ones. 



The input to the receiving circuit is 10,000 kv.a. at 85 per cent 

 power factor = VsEI and, therefore, the current per conductor 

 is 



7 10,000,000 



/ = ^ = 92.6 amperes. 

 V3 X 60,000 



The admittance of the receiving circuit per phase is 



- 0-00278; 



V3 

 the conductance is 



/ cos 92.6 X 0.85 

 '= : 60,000 



V3 

 and the susceptance is 



b = Vy* - g* = 0.001463. 



