ADVANTAGES AND DISADVANTAGES 



27 



I. Power rating of constant- voltage transmission lines. 



II. Synchronous phase modifiers required for the 

 above constant-voltage lines. 



III. Power rating of varying-voltage transmission 

 lines. 



The data for Figs. 5 and 6 are: Length of lines, 100 



Copper, B. & S. Gauge and Circular Mils. 

 FIG. 5. 60 Cycle Lines. 



miles; highest working voltage on lines, 115,000; power- 

 factor of loads, 80 per cent. 



The statement has been made several times in the 

 preceding chapters that adjustable power-factor is much 

 more valuable in saving line costs than mere high 

 power-factor. In other words, the power rating of a line 



