24 TRANSMISSION LINE FORMULAS 



4. Find the volts drop and the watts loss, in the following line: 

 Length of line 20 miles. 



Spacing 5 feet. 



Conductor No. i aluminum cable. 



Two phase, 25 cycles. 



K.V.A. at supply end 10,000. 



Volts at supply end 35,000. 



P.F. at supply end 80%. 



[Ans. 5950 volts, 1770 Kw.] 



5. Find the per cent regulation of the following line: 



Length of line 25 miles. 



Spacing 3 feet. 



Conductor, No. o copper wire of 0.520 ohm per mile. 



Load (at receiver end), 2500 K.V.A., 20,000 volts, 60% P.F., 

 three phase, 25 cycles. (Prob. 6, Chap III.) 



[Ans. 8.51%.] 



