ALTERNATING GENERATORS AND SYNCHRONOUS MOTORS. 111 
draw a line through B and the zero point, this straight 
line OV, will represent the short circuit characteristic with 
satisfactory exactness. This operation has been performed 
in Fig. 61, giving the characteristic of the 375 KVA. two 
phase alternator. 
Ratio OF ARMATURE CURRENTS: In conclusion it is inter- 
esting to state that, for this machine, the ratio between the 
normal armature current and the current of the short 
circuited armature, when the excitation corresponds to 
normal open circuit voltage is ee which is equal to 2.46, 
a good commercial value. 
Printed in U. 8. A. 
