Supporter fixed tower for extra-high voltage power transmission line

摘要

The present invention relates to a pylon fixing type cross arm unit for an extra-high voltage overhead electric power line for power transmission. The pylon fixing type cross arm unit includes a vertical rotation means for rotating the cross arm unit against a pylon in a vertical direction while the cross arm unit supports an overhead electric power transmission line through a line post insulator. The pylon fixing type cross arm unit can quickly and conveniently raise the overhead electric power transmission line on a vehicle road to prevent contact with vehicles when tall vehicles travel on the road is in the risk of coming in contact therewith. The pylon fixing type cross arm unit can quickly and conveniently lower the overhead electric power transmission line, after the corresponding vehicle passes the road, to maintain the average height. The pylon fixing type cross arm unit can shorten the traffic control time to minimize the inconvenience, prevent the breakage of the overhead electric power transmission line, and prevent the overhead electric power transmission line from falling down from the line post insulator. The pylon fixing type cross arm unit also includes a twisting prevention means to prevent the overhead electric power transmission line from being twisted during a vertical rotation process.