TC 9-64 _________________________________________________________________________
Figure 3-18. DC Voltage Applied to a Line
AC Applied to a Transmission Line
3-63. When the battery of figure 3-18 is replaced by an AC generator
(figure 3-19), each successive instantaneous value of the generator voltage is
propagated down the line at the speed of light. The action is similar to the
wave created by the battery except that the applied voltage is sinusoidal
instead of constant. Assume that the switch is closed at the moment the
generator voltage is passing through zero and that the next half cycle makes
point A positive. At the end of one cycle of generator voltage, the current and
voltage distribution will be as shown in figure 3-19.
Figure 3-19. AC Voltage Applied to a Transmission Line
3-20
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