Industrial Contaminants Adhering To The Insulation Surface Of Cable Terminals Can Induce Creepage Discharge.

In industrial settings, atmospheric dust, oil droplets, and chemical particles accumulate over time on the exposed insulation surfaces of electrical equipment, altering the electric field distribution between the insulator and its surroundings. These contaminants form conductive pathways, causing a significant decrease in the surface discharge threshold of the copper lugs insulating layer.

If Aluminum Cable Lug is subjected to such environmental erosion over a long period, its insulation surface often experiences electrical performance degradation without visible damage. These deposited contaminants accumulate over time, forming conductive bridging points that cause the electric field to propagate along the insulation surface rather than penetrating the interior of the insulator, leading to surface breakdown or surface discharge. These problems are particularly pronounced in high-voltage or exposed Compression Cable Lug structures, often manifesting before conventional insulation failure.