100 THE DESIGN OF STATIC TRANSFORMERS 



The height of the winding space (" b " in the formula) is 51. 

 The core density (" < " in the formula) is 11,5 kilolines per 

 sq cm. Suhstituting these values in the formula, we 

 ohtain 



12 800 

 Percentage reactance drop = 0,080 X -^r- I~K~ 1>75. 



IK 

 X ll,o 



tt 



uoza 

 * 



O> 



O.I 



o.* 



.0.5 



S2 4J 



.. of W/tf//? of Window fo Lenyfk of Window. 



FIG. 58. Curve of values for / in formula " percentage reactance 



,1 _ f J^,, 



be' 



a. 6 



- a 

 drop = / 



We have already seen that the resistance drop is equal to 1,80 

 per cent. Thus we have 



Reactance drop = 0,0175 X 5000 = 87,6 volts 

 Resistance drop = 0,0180 X 5000 = 90,0 volts 

 Impedance voltage = A/87,6 2 + 90,0 2 = 125 volts. 



