| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for attaching surge protective device to iron tower supporting overhead wires in parallel by which the occurring frequency of flashover accidents in the whole iron tower can be reduced, without increasing the number of surge protective devices. SOLUTION: At the time of attaching surge protective devices 1 to one-side lines of a iron tower supporting four or more lines, the devices 1 for top-side lines and devices 1 for bottom-side lines are staggeredly attached to the lines on the opposite sides of the support of the iron tower. The voltage across the insulator strings of lines having no surge protective devices can be lowered, and the occurring frequency of flashover accidents can be reduced than the conventional example where the surge protective devices are attached to lines on one side of the support. |
