In cases where ACSR aerial distribution cables are exposed to corrosive environments or trees, they can be protected with a single-layer suitable covering (CC).
The insulation of these conductors is made of XLPE (Cross-Linked Polyethylene).
XLPE is a polyethylene in which the molecules are cross-linked (forming X-shaped bonds). After being processed in a steam chamber under high temperature and pressure, the cross-linking of the molecular chains is enhanced.
Compared to PVC (polyvinyl chloride), XLPE insulation offers better thermal (higher heat tolerance), mechanical, electrical, moisture, and UV resistance, and it can withstand high tension well. The structure of this insulation provides significant resistance to abrasion and tearing.
It should be noted that the conductors in this category are made of aluminum alloy (magnesium and silicon) or compact ACSR.
The technical specification table for medium-voltage covered conductors according to EN 50397 can be downloaded.