| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent the generation of corona discharge even if used in an extra-high voltage multiple-conductor transmission line and to prevent the collision of birds and the contact of fishing rods and the like by positioning a marking member, which is attached to a filament body at a position in a circle in contact with the outer surface or each conductor constituting the multiple conductor. SOLUTION: Marking bodies 3 having marking pieces 32 are attached at a specified interval in the longitudinal direction of a filament body 2. The marking bodies 3 are arranged at the inner side of a circle X in contact with the outer surfaces of respective conductors 1A, 1B, 1C and 1D constituting the multiple conductors. The potential inclination of the inside of the circle X in contact with the outer surfaces of the respective conductors 1A, 1B, 1C and 1D is low. Therefore, when the marking body 3 is arranged at this position, corona discharge is not generated from the marking body 3. Furthermore, since birds and man can be notified of the presence of the transmittion line by the marking body 3, the collision of the birds, helicopters and the like and the contact of fishing rods and the like can be effectively prevented.</p> |
