326 



ELEMENTS OF ELECTRICAL ENGINEERING. 



Figure 276 shows a quarter-phase* alternating-current gen- 

 erator panel (A.Q.G. panel) including exciter connections. 



Feeder panels. Single-phase circuits are frequently supplied 

 from three-phase generating stations. When this is done, pro- 

 vision is usually made for connecting the single-phase feeder to 

 one or another pair of main bus-bars at will. Thus, Fig. 277 



r 



1 1 



\-. 



62 



I 



/Immete? 



Comjoenscfttry 

 Vo/tmet-er, 



\Regufa~eor 

 \ Operating 



D.P.JD.T: 



ffutomatfc 



W Switch 



Dgfitnin^/frresters. \ 

 , NotfurntshedjvitJ? 

 ^ 



Fig. 277. 



shows the front view of an alternating-current single-phase feeder 

 panel (A.S.F. panel), and the connections on the back of the 

 same. The voltmeter is represented as being compensated as 

 explained in Art. 152; the main switch is a double-pole double- 

 throw automatic oil switch arranged to connect the pair of feeders 

 to one or another pair of buses ; and the connections of a voltage 



* The term quarter-phase is frequently used to designate a two- phase system. 



