62 CONSTANT-VOLTAGE TRANSMISSION 



SUMMARY OF CHAPTER DC 



Synchronous Motors in Local Distribution 



1. A charge for energy at a simple rate per Kw.-hour 

 results in a low P. F. load. 



2. A bonus for 85 per cent P. F. encourages a custo- 

 mer to keep induction motors fully loaded, but does not 

 induce him to install synchronous motors. 



3. A bonus up to 100 per cent P. F. encourages the 

 installation of synchronous motors, but penalizes voltage 

 control. 



4. Where the customer's aid is desired in making use 

 of the constant-voltage method, a bonus should be based 

 on the available Kva. rating of synchronous motors, 

 with penalties when they are not adjusted to give con- 

 stant voltage. 



