POLYPHASE SYSTE^fS 



97 



diametrical voltages are equal to \/2 times the coil voltage. 

 The line currents are equal to the \/2 times the coil current, 

 because the line currents are the resultant of two equal currents 

 having 90 phase difference. 



' 



Fio. 98. Measurement of power in a 2-phase inter-connected system. 



.. 99. Measurement of power in a 2-phase, 3-wire system. 



In I the coil voltage is 200 volts, and the diamet Heal 



voltage is 200 \f2 = 283 volts. The mil current is 100 amp. 

 and the line current i> 111 amp. The total kv-a. capacity of this 



:i is 



.X200X100 =80kv ^ 



