108 THE DESIGN OF STATIC TRANSFORMERS 



nearly parallel to C BI O , and if (as in Fig. 67) a perpendicular 

 is dropped from C intersecting A BIQ at EIQ, then A EIQ will 

 be equal very nearly to the actual drop at the power factor 

 represented by the radius C 7?io, i.e., at a power factor of 0,98. 



90 



FHJ. (57. Modified regulation diagram of 20-kva 5000/200-volt single-phase 



transformer. 



The diagram may thus be conveniently drawn to a large scale, 

 as shown in Fig. 67, thereby eliminating to a large extent 

 inaccuracy in drawing and scaling off the diagram. In Fig. 67 

 A D represents the resistance drop andD Cthe inductive drop. 

 A BIQ is drawn parallel to C BIQ, which makes an angle of lag of 

 10 with C BQ. A line C E\Q is drawn perpendicular to A BIQ. 



