SHORT-CIRCUIT CURRENT AND LEAKAGE FACTOR. 



37. 1 want to call attention to the load losses, which are always pres- 

 ent in polyphase motors, the causes of which are, however, still vary 

 obscure. 



The maximum efficiency of this motor is 84.5 per cent. The losses 

 are: 



Hysteresis, eddy currents and friction 800 watts. 



Ohmic loss in primary 600 



Ohmic loss in secondary 200 " 



Total losses 1600 watts. 



Output 13200 " 



Input 14800 watts. 



The energy which the motor actually consumed amounted to 15600 

 watts, corresponding to an additional loss the load loss of 6 per 



DIAMETER 122.5 A 



FIG. 15 



cent of the output. The load loss increases rapidly with increasing 

 load, until it becomes equal to all other losses taken together. 



