TABLE I 93 



(5) Reactive Kva. of Load. 



E Qt EmP 



'- = - (a negative quantity) 



1,000 1,000 



where Qi is the reactive component of the load current, 



7? P 



- is the load in kilowatts at a lagging P. F. cos 0, 

 and m is a constant equal to -- -. 



COS0 



(6) Reactive Kva. of Synchronous Motors. 



This may be read from the circle diagram, or it 

 may be more accurately derived by using the calculated 

 value of Q in the expression 



^ + ^ Kva. 



I,OOO I,OOO 



When the above expression is positive, the current 

 in the synchronous motors is leading, and they require 

 strong field current. When the expression is negative 

 the current is lagging, and the synchronous motors 

 operate with weakened fields. 



(7) Line Losses, in Kilowatts. 



(P 2 + Q 2 ) R 



1,000 



P is determined from the Kw. load, and Q is either 

 read from the circle diagram or calculated by means of 



(3). 



(8) Kw. at Generators. 



1,000 



(9) Kva. at Generators. 



E 8 V P 2 + Q 2 



1,000 



