Causes Of Deflection Of Suspension Insulator String

When the overhead line is being strung, the conductor is first hung in the pulley, and after the sag observation of the line is completed, it is moved into aerial cable suspension clamps. When the conductor is hung in the pulley, the conductor tension at the outlets on both sides of the pulley must be kept equal, otherwise the conductor will slide in the pulley until the tension is equal. If the span and the height of the suspension point in the tension section are the same, the horizontal tension (or horizontal component force) on both sides of the pulley are equal, and the pulley is in a vertical position. At this time, installing angle suspension clamp and harga suspension clamp at the center point of the conductor pulley can maintain vertical suspension and indicate that the horizontal tension of each gear is consistent. Under normal circumstances, the spans and suspension point heights in the tension section are not the same, especially when the line goes up or down the mountain for several consecutive gears, the spans and suspension point heights are very different from each other. Although the tension on both sides of the wire in the pulley is equal, the horizontal tension is different due to the different hanging angles of the wires on both sides, causing the pulley to tilt. As a result, the horizontal tension (or stress) in the gear with the lowest point of the wire is smaller than the design value, while the sag is larger than the design value; the horizontal tension (or stress) in the gear with the lowest point of the wire is larger than the design value, while the sag is smaller than the design value. Generally, the pulley will tilt uphill. When observing the sag during line erection, the sag value of the wire in the pulley should be observed. When installing messenger suspension clamp, it should be installed according to the calculated adjustment distance. In this way, after the wire is installed, suspension clamp with i hook can be kept vertical and not tilted, so that the horizontal tension of each gear is the same and the sag is consistent with the design value.