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Mass impregnated (MI) HVDC cable systems

Long-distance HVDC MI cable systems for high-voltage power transmissions with a capacity of up to 525 kV

Since 1954, HVDC mass impregnated (MI) cables have been used in power transmission projects at the highest DC voltage levels. Today, MI cables are rated up to 525 kV, and are mainly used for submarine transmissions, grid interconnections and connection of remote offshore installations to mainland grids. The MI cable technology has a long, established history, an extensive track record and excellent reliability.

Why ABB?

ABB provided the world’s first MI HVDC cable in 1954, a 100 km connection with a voltage level of 100 kV, between Gotland and the Swedish mainland. In 1994, ABB supplied 420 km of cable with a voltage level of 450 kV, for the south part of the cable route for the NorNed project. NorNed connects Norway and the Netherlands with a total cable route of 580 km, and it is the longest HVDC MI submarine cable system ever built. Another addition to ABB’s project portfolio is the 525 kV NordLink project, which will increase energy security in Norway and Germany and contribute to the increased integration of renewable energy. The project will be commissioned in 2019.

  • ABB pioneered the traditional MI technology in 1954
  • ABB launched the world’s first 450 kV MI connection, the Baltic Cable
  • ABB supplied the world’s longest MI cable, NorNed, in 1994

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