| 摘要 |
<p>PURPOSE:To lower the height of a suspension support so as to improve the effect of preventing the falling of a thunderbolt by providing an arm for overhead ground wire projecting from the tip of an insulating arm, in parallel with the insulating arm, over the insulating arm at the uppermost stage, and annexing an overhead ground wire. CONSTITUTION:A suspension support 28 is constituted of a pole 28a, and insulating arms 23 are provided in three stage above and below so as to from a contact transmission line. At the apex of the pole 28a is provided an arm 30 whose tip projects outward from the insulating arm 23. In the vicinity of both ends of the arm 30 for an overhead ground wire is an overhead ground wire 31 arranged in parallel with the transmission line 6. The insulating arm 23 is composed of an oblique material 23 and a horizontal material 21 where high polymer insulators such as umbrella silicon rubber, or the like, are provided around the rods of insulating rods by FRP, or the like, and the base sides are coupled with the pole 28a, and the tip sides are coupled with each other by a yoke 24. Hereby, thunder shield angle theta to the cable of the overhead ground becomes approximately 0 deg., and the thunder damage is prevented, and the height of the overhead ground wire, accordingly, the height of the pole is reduced.</p> |
