Impact Of Rain And Fog On The Discharge Risk Of Wedge-shaped Tension Clamps

In rainy or foggy environments, water molecules combine with airborne pollutants to form conductive channels on the metal surface of dead clamp. These tiny water droplets adhere to the gaps in the dead end clamp overhead line structure, gradually connecting to form a continuous wetted layer. The pollutants dissolve in the moisture, causing a sharp increase in surface conductivity. Under the influence of an electric field, the wetted pollutant layer begins to generate leakage current, and the temperature in the localized area rises accordingly.

The wedge-shaped structure of dead end clamp with eye hook makes it more prone to moisture accumulation under humid conditions. The tiny gaps between the contact point of dead end loop clamp and the wire, and between dead end tension clamp and the body, can become points where moisture can accumulate. When the fog concentration reaches a critical value, the moisture content in these areas increases significantly, forming electrical weak points. The degree of wetness of the pollutant layer varies with the droplet diameter and falling velocity; the wetting effect in light rain or dense fog is often more lasting than in heavy rain.