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High voltage manufacturing site in Karlskrona, Sweden

NKT Lighthouse – our new extrusion tower

Key geographical location​ – close to Europe’s offshore wind market

We are a leading supplier for renewable power transition - more than 50 awarded projects for offshore wind since 2010. EU aims to be climate neutral in 2050 with 300 GW renewable wind power – that will need a 25-fold increase in offshore wind capacity by 2050. We have been investing in our HV factory in Karlskrona heavily since 2012 to meet these demands. The biggest investments have been the office and factory expansion, the cable-laying vessel (NKT Victoria), the new harbor and a new test laboratory. Our newest pride and joy will be the second cable tower, NKT Lighthouse.
Our HV cable systems are connecting countries and bringing energy from one place to another:
  • Hydro power from Sweden and Norway
  • Wind power from Germany, Belgium, Denmark, Netherlands and UK
Image of Wind references

Facts on the new tower, NKT Lighthouse

Image of NKT Tornet Tower
  • Second (new) tower
  • 150 m over ground
  • 38 m under ground
  • 18 x 20 m wide
  • 17 floors
  • 7700 tons of concrete
  • 985 tons of armoring
  • Construction period 2020-2022

In the tower, NKT will produce power cables up to 640 kV

Image of NKT Cable insulation
In the tower, the insulation system of the cable is applied through extrusion. The high tower is needed for the cooling of the cable which is hanging in a vertical position. 
The cables could be produced for up to 640,000 volt direct current (DC) and 3 gigawatt – equivalent to the power for all households in Denmark.

Overview of capacity expansion project at NKT’s Karlskrona plant: Highlights of investment

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  • Site XLPE extrusion capacity increase - making it one of the world’s largest sea cable production plant (seen with MI and XLPE)
  • Construction of new 150 m cable tower – one of Sweden’s tallest towers
  • Increase by up to 100 jobs – making it NKTs largest production site – and driving construction work employment as well as sub-contractors in Sweden.

One of Sweden’s tallest towers

Image of NKT 3 Towers drawing
The new cable tower will be one of Sweden’s tallest towers when ready, reaching impressive 150 m. Only Turning Torso in Malmö (190 m) and Kaknästornet in Stockholm (155 m) are taller.

Watch our new completed extrusion tower NKT Lighthouse

Learn more about how a cable is produced and installed


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