What can happen if there is a void in a cable termination?

When there is a void in a cable termination, discharge can occur across that void due to the breakdown of the insulating material. Voids can create pathways for electrical discharge, leading to partial discharges or arcing. This phenomenon occurs because the presence of a void alters the electric field distribution within the termination. The void creates areas where the electric field strength can exceed the dielectric strength of the surrounding material, resulting in a breakdown and potential electrical discharge.

Understanding this is crucial for maintaining the integrity and safety of electrical systems, as discharges can lead to insulation failure, damage to the cable or equipment, and in some cases, safety hazards. Recognizing that a void in a termination represents a weak point where electrical insulation is compromised helps emphasize the importance of proper installation and maintenance practices in high-voltage applications.