| 摘要 |
PURPOSE:To improve the durability of the suspension frame of a compound overhead earth-wire by fixing the through bus jumper part of the compound overhead earth-wire bypassing a steel tower by the use of a conductive auxiliary wire, metal fittings to be fastened together and a jumper clamp. CONSTITUTION:A through bus jumper part 10a between a pair of anchor clamps 4 of a compound overhead earth-wire 10 is curved in the manner bypassing a steel tower 1. Then, a conductive auxiliary wire 11 composed of aluminum strand, etc., is arranged parallel to the through bus jumper part 10a and the middle part and vicinity of the auxiliary wire 11 is held and fixed at the steel tower 1 by the use of a jumper clamp 7. Also, the both ends and vicinity of the auxiliary wire 11 are fixed integrally by the through bus jumper part 10a and conductive metal fittings 12 to be fastened together. Thus, even if a side shaking occurs at the compound overhead earth-wire 10 by a strong wind, no fixed point exists in the through bus jumper part 10 by a and a bending stress is distributed and absorbed all over the part so that the suspended frame of the compound overhead earth-wire 10 improves in durability. |
