The Impact Of Insulation Support Contamination On The Performance Of Copper Terminal Blocks

Insulating supports are responsible for isolating live parts from the surrounding structure, and the accumulation of contamination on their surfaces can have a series of effects on the operating status of the copper terminal block. When particles such as dust, salt spray, and oil adhere to the insulating support, the originally high-resistance insulating path may be transformed into a conductive path, resulting in an increase in local leakage current on the surface, thereby changing the electric field distribution in the electrical environment.

When the contamination layer comes into contact with copper distribution block, these conductive or semi-conductive impurities promote the formation of leakage paths, deteriorating the insulation environment around copper terminal strip. Any factor that reduces the dielectric strength of the support can potentially induce unstable phenomena such as localized corona discharge and surface breakdown, ultimately affecting the insulation performance between terminals and between terminals and ground.