102 CONSTANT-VOLTAGE TRANSMISSION 



2.3 2. 3 . 4 . 5 



where Q is found either from the circle diagram or from (3) . 

 Line losses = (AC + BD- EP) Kilowatts. 



(AC + BD) 



^ 



(8) Kw. at Generators. 







1000 



(9) Kva. at Generators. 



E 8 



1000 



(10) Power-factor at Generators. 



100 (AC + BD) 

 - . = per cent. 



E 8 V C 2 + D* 



(n) Reactive Kva. at Generators. 

 -^-(AD-BC) 



1000 V 



When this quantity is positive, the reactive Kva. and 

 the generator P. F. are leading, and when it is negative, 

 they are lagging. 



(12) Efficiency of the Transmission Line. 

 100 EP 



Cent 



AC + BD 



(13) Amperes per Wire. 



As all the expressions for current are in total amperes, 

 it may be noted that 



total amperes 

 amperes per wire, 3-phase, = - 1=~ 



V3 



total amperes 

 amperes per wire, 2-phase, = - - 



and amperes per wire, single-phase, = total amperes. 



