238 



ELEMENTS OF ELECTRICAL ENGINEERING. 



having no inductance and therefore the total secondary induced 

 voltage Ob is available as terminal voltage. 



Fig. 203. 



When the secondary receiving circuit is highly inductive, that 

 is, when the secondary current /" lags nearly 90 behind E", 



Fig. 204. 



as shown in Fig. 203, then a>Pf f is nearly parallel to Oa and 

 the useful part of the primary voltage, Oa, is numerically equal 



