What Are The Causes Of Errors When Installing The Crossarm Vertically And Horizontally?

The vertical and horizontal installation errors of Dead End Clamp mainly consider: the horizontal tilting error adds harmful external forces to the crossarm, pole and insulation after the line is erected;

The influence of vertical error on the sag within the span: the difference in the sag of each phase line within the span should not be greater than 50mm. If the vertical tilt error of the crossarm is greater than 25mm, the difference in the lowest point of the conductor is greatly enlarged, thereby increasing the risk of wind deviation approaching or even mixing lines, and it cannot meet the requirements of sag error, so it should be limited.

The crossarm is generally installed 300mm from the top of the pole. In order to facilitate the identification of the power supply side during maintenance and inspection, the single crossarm should be installed on the receiving side; the single-mode arm of the 90° corner pole, terminal pole and branch pole should be installed on the wire pulling side, and the crossarm support iron should be installed on the left side facing the receiving side.

In addition, the unified installation process can form a regular process for future maintenance and inspection work, avoid missing inspection items, and make it easy to find defects.