General introduction of IEC 60840 high voltage cable

The International Electrotechnical Commission’s standard IEC 60840 references the requirements for cables and cable accessories with a voltage rating of between 30kV (Um 36kV) and 150kV (Um 170kV). The cables are of either single core or individually screened three-core cables but, as with the lower voltage standard IEC 60502, it excludes cables for special applications such as submarine and mining.
These high voltage cables are designed for fixed installations and suitable for the primary distribution of power. These cables have an outer sheath of High Density Polyethylene (HDPE) which offers a balance between abrasion resistance and flexibility.