The cross arm is usually installed 300 mm from the top of the pole. A single cross arm must be installed on the receiving side to facilitate identification of the power side during maintenance or overhaul. 90o angle pole, terminal pole and branch pole single-mode arm must be installed on the cable side, and cross arm support iron must be installed on the side facing the power receiving side. on the left. In addition, the integrated installation process forms a routine process for future maintenance and inspection, avoiding missing inspection items and easy to find defects.
Generally, the load borne by the cross arm can be divided into three types: transverse load, longitudinal load and vertical load. The transverse load is the load along the cross arm direction, such as the horizontal wind force of the direct pole conductor and ground wire, and the horizontal transverse component generated by the tension of the corner pole conductor and ground wire, etc; The load perpendicular to the cross arm direction during longitudinal load, such as the component of conductor and ground wire tension in the direction of vertical cross arm or ground wire support; Vertical load refers to the load perpendicular to the ground, such as the gravity of conductor and ground wire.
The maintenance items and standards of power fittings such as iron cross arm and support of household connection line are as follows: 1. Those whose surface is rusted shall be brushed with rust and coated with a layer of gray antirust paint. 2. Those seriously rusted or worn out shall be replaced. 3. If it is loose, it shall be reinstalled firmly, whichever cannot be moved.
Customizable cross arm size
Post time: Jun-24-2022
