Abstract
This paper describes the characteristics of a lightning surge which propagates on an incoming line between a first tower and a substation. Experimental results by the use of a 1/10 scale model considering an actual line configration, which is a double circuit vertical line at the tower and a horizontal line at the substation, show that line voltages of an applied phase are not affected by the line configration, however, the other phases are affected. Calculated results by the EMTP, dividing into several parallel conductors, and approximate formulas agree well with the experimental results. Since mutual impedances between the applied phase and the other phases change on the incoming line, the line voltages of the other phases increase or/and decrease due to reflections.
