94 



ALTERNATING CURRENTS 



The two phases may be carried along, insulated from each 

 other, to supply two separate single-phase circuits or they may 



N 



Q, Generation of 2-phase power 



(c) Vector 

 representation of 

 2-phase emfs. 



Two-phase eml. waves 

 FIG. 92. Phase relations of 2-phase electromotive forces. 



supply a common load such as an induction motor, Fig. 93. 

 The two phases are entirely insulated from each other in Fig. 93 



Generator jc 



Coils 



2-Pbaee 

 Induction Motor 



FIG. 93. Two-phase circuit in which two phases are insulated. 



and no single load can be applied between the two phases. 

 Moreover, only one value of voltage is obtainable, as the voltages 

 of the two phases are equal. 



