High voltage manufacturing site in Karlskrona, Sweden

Expansion of Karlskrona high-voltage cables facility

Sweden's third highest 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 expension, 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. Please join and provide a name suggestion further down this page.

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
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Facts on the new tower

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  • 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

Live Stream

Watch the cable tower being built

Watch the third tallest tower in Sweden being build via our live camera

Preview of web camera

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

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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 Sweden's third highest tower

  • Increase by up to 100 jobs – making it NKTs largest production site – and driving construction work employment as well as sub-contractors in Sweden.

Third tallest tower in Sweden

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The new cable tower will be the third tallest in Sweden when ready, reaching impressive 150 m. Only Turning Torso in Malmö (190 m) and Kaknästornet in Stockholm (155 m) are taller.

Learn more about how a cable is produced and installed

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