582 



ELECTRICAL MEASUREMENTS 



Using the mesh currents as indicated, 



/,; (Z, + Z G + Zi) - XZ l - YZ 2 + jumY = 

 = 



At balance /,, = or 



In tins c;isc X = /i, V = 7o, 

 also 



}. 359. Mesh diagram for Fig. 358, pertaining to determination of 

 characteristics of current transformers. 



Substituting, 



/i = 



= -J 2 Li ? r / _ 



r> 2 l_ 2T 2 



yci^ + W*LI* 



jco - 1 -5-7 / 2 . 



7^! 2 + C0 2 Li 2 



"i 



The value of /i 2 in terms of 7 2 2 and the constants of the 

 circuit is 



7r = [ -Vft 2 2 , ^ 2 x 2 ? + ~ ~f 

 Ratio = 



.*. y^ = -5^ approximately. 



T i , T , , 



/, leads 7, by tan -' 



-m)' 



