K FORMULAS 31 



Current at supply end in total amperes* 



(7) VCH^. (8) VCo 2 + A, 2 . 



K. V.A . at supply end. 



A 



K.W. at supply end. 

 (n) (4C + BZ?). (12) 



IOOO IOOO 



Power factor at supply end, in decimals. 



AC + BD , , 



U 



In- phase current at supply end in total amperes.* 



, . AC+BD f ... A C +B D Q 



(16) - -- 



Reactive current at supply end in total amperes* 



BC-AD , g , BoC -A D Q 



A + ^-' A +-*f-' 



2 A 2 AQ 



When this quantity is positive, the current is lagging. 

 When this quantity is negative, the current is leading. 

 K.W. loss in line. 



(19) (AC + BD-EP}. (20) (A C + BM 



IOOO IOOO 



[same as No. 12], 

 Per cent efficiency of line. 

 f \ 100 EP 



(2I) Ic+B5 percent - 



* Amperes per wire, three-phase, = - 



Total amps. 

 Amperes per wire, two phase, = 



