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World´s most powerful underground power transmission cable system

640 kV extruded HVDC cable systems

Investment pays off

The 640 kV extruded DC cable system is a testament to our intensive investment in research and development in the field of HVDC transmission technology. Setting a new world record for extruded HVDC cable technology, this innovation enables the integration of renewable power and connecting energy markets.
Innovative test hall for 640 kV DC innovations in Karlskrona

Green power for every household

A single pair of 640 kV extruded High Voltage DC cables could transmit enough green power to supply three million households. That is more than the total number of households in Denmark!
Sectional view of 640 kV extruded high-voltage DC cable

The world's most powerful underground DC cable system 640 kV

Successfully tested and qualified by NKT

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