Analysis of Causes and Prevention of Overhead Lightning Wire Disconnection Due to Suspended Line Clamp Wear
I. Cause Analysis According to investigations, the areas where overhead lightning wires have disconnected are predominantly located in regions with high wind forces. The two main reasons for disconnections caused by wear on suspended line clamps are: Relative Movement Due to Wind: The body of the suspended line clamp experiences relative motion with the hanging board due to wind forces, causing the hanging board to swing around the clamp's shaft at a small angle. Since the hanging board is relatively thin, this swinging action can create grooves, leading to a reduction in the cross-sectional area of the clamp's shaft. Once the grooves reach a certain depth, the weight of the lightning wire can cause the clamp's body to fall from the suspended line clamp, resulting in a disconnection and grounding incident. Improper Clamp Size or Insufficient Tightening: If the suspended line clamp is too large or the lightning wire is not tightly secured, relative motion can occur between...