The shielding layer formed by wrapping semi-conductive tape produced by MAXWEL, around the cable is a crucial component in the process of installing intermediate joints for power cables. The cable conductor is composed of multiple wire strands twisted together, which can lead to the formation of gaps between the conductor and the insulation layer, as well as an uneven conductor surface that causes electric field concentration.

Applying a layer of shielding formed by wrapping a semi-conductive tape around the conductor’s surface serves as an inner shielding layer. This layer maintains equipotentiality with the shielded conductor and ensures good contact with the insulation layer. As a result, it prevents occurrences of partial discharges between the conductor and the insulation layer.

Likewise, gaps can exist at the interface between the insulation layer and the protective sheath, which can contribute to localized discharges. To address this, an outer shielding layer is established by wrapping semi-conductive tape , manufactured by maxwel, around the insulation surface. This layer maintains solid contact with the shielded insulation layer and shares equipotentiality with the metal protective sheath. Consequently, it prevents localized discharges between the insulation layer and the protective sheath.