HISTORY OF THE CONSTANT-VOLTAGE SYSTEM 45 



January, 1914, the exact details of the line construction 

 were published in The Electrical World. The data re- 

 garding the construction details of the transmission line 

 of Example 1, Chapter X, are the same as for the Big 

 Creek line. The data of that example regarding volt- 

 ages and loading, etc., are merely hypothetical. It may 

 be noted that the voltage is 150,000 and the power 

 capacity of one circuit has been announced to be 60,000 

 Kva. It was at once obvious from the large size of 

 conductor and the wide spacing, which gave a reactance 

 more than four times the resistance, that dependence 

 was to be placed on power-factor control in order to 

 transmit enough power to utilize properly such large con- 

 ductors. Synchronous phase modifiers of a total rating 

 of 30,000 Kva., and controlled by Tirrill regulators, 

 were installed from the first in the Los Angeles receiving 

 station, and were sufficient to double the power capacity 

 of the two 3 -phase circuits. It was not altogether a 

 surprise, therefore, when in The Electrical World of Feb- 

 ruary 28, 1914, the engineering corporation responsible 

 for the design and construction published the statement 

 that "the condensers are used because without them 

 the cost of the line would have been greatly increased to 

 give the degree of regulation absolutely necessary for 

 proper commercial service, . . . and the condensers 

 are included as an integral part of the design, because 

 economy has been obtained in the design as a whole 

 through their use." 



The Big Creek project may be considered to be the 

 most striking and convincing example to which reference 

 can be made, of the economy and advisability of con- 

 stant-voltage transmission. 



