DETAILED 



For a line of 10 kilometers and a frequency of 100 cycles, the 

 reactance (assuming the capacity to be negligible) will therefore be 



CTAILED STUDY OF OPERATION WITH NORMAL LOAD 39 



10X628X1.872 

 k = 11.8 ohms, 



IOOO 



approximately 12 ohms. 

 Under these conditions, the constants of the circuit are, in round 

 numbers, as follows: 



R i6 ohms, # = 98 ohms; Z = ioo ohms; and we have 



uu 



tan 7-= =6.12, 



16 



cos r= =0.16. 



100 



The ratio of the two scales will be 100. Therefore a distance 

 corresponding to 2000 volts on one scale will correspond to 20 amperes 

 on the other scale. 



Suppose, now, the E.M.F. of the motor to be 2 = 2000 volts, and 

 let it be represented by the stationary vector A%O (Fig. 24) drawn 

 on the axis of OX in the negative direction. The right line YA 2 Y',- 

 making the angle 7- with OX, backward, will be the origin of the 

 vectors representing currents. The lines of equal electric power for the 



