58 TRANSMISSION LINE FORMULAS 



When the line is carrying full load, the measured value 

 of the receiver voltage is E, and of the supply voltage, 



A H - If the load be thrown off and the supply volt- 



2 A 



B 2 



age be kept constant at A H > then the receiver voltage 



2 . 1 



will rise to a value EQ. The line is now at no load, and the 

 ratio of the voltages at the two ends is, by equation (2), 



2 A -. . . ./ . YZ , F 2 Z 2 \ 



= absolute value oil i H \- - f etc. ) 



V 22-3-4 / 



B, 2 



'A** 



Thus 



(equation 2, Table III). 



We are now in a position to obtain the regulation of the 

 line, since by the definition in the A. I. E. E. Standardiza- 

 tion Rules, 



77 7^ 



Per cent regulation = - - X 100. 



L 



Thus, the regulation volts at the receiver end which are 

 to be expressed as a percentage of E, are 



as in equation 3, Table III. 



