POLYPHASE SYSTEMS 



95 



If, however, the generator coils be connected at their neutral 

 points and a neutral conductor carried along with the other 

 conductors, a quarter-phase, five-wire system results, as shown in 

 Fig. 94 (a). Moreover, three different voltages are available. 



() (6) 



IK;. 94. Two-phase inter-connected system giving 4-phase, 5-wire system. 



If the voltages between the outer wires of each phase be 200 

 volts, then 200, 100 and 141 volts are available, as shown in Fig. 

 94 (b). This system is more readily unbalanced than the three- 

 phase system, which is an objection to its use. Another objection 



is the greater number of wires. 



/' 





200 



283 V. 



fe* 



200V. 



2UOV. 



95. Two-phase, 3-win- >v^U>m. 



If one end of the coil .1 l>e connected to one end of the coil tt, 

 a three-wire, two-phase system results, as shown in Fig. 95. 



This givefl two ditTerent vdueofvoltage,200aixi283< -'<><> \ 2) 



Volts. Till- ByBtem l> little ll-ed l>ec;ill-e <>t" the C( Ml>i le I'M 1 >le 



amount of voltage unbalancing which results, even when moder- 



