c cabHigh Voltage Cables
Nexans Norway AS
Cable installation in Lofoten in 1961
For more than eighty years, Nexans Norway AS – formerly Standard Telefon og Kabelfabrik AS (STK) – has been the principal supplier of power cables in Norway. These eight decades have seen enormous development of the country´s hydropower resources. Today, Norway´s consumption of electricity per capita is higher than that of any other country in the world. Most of the hydro-electric power stations are located in the mountains, whereas the main centres of population are in the lowland and coastal regions. Consequently, hydropower development has been accompanied by the growth of an extensive power grid for the transmission and distribution of electricity. Underground and submarine cables are important components in the power grid. Over the years, Nexans Norway has acquired vast experience in manufacturing and installing power cable systems.
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Nexans Norway AS Cable technology in the forefront Design and engineering XLPE cables A few examples of installations Oil-ﬁlled cables Cable design A few examples of installations Development for future needs Research and development Cable accessories and installation services A full range cable supplier
Cable technology in the forefront
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The Halden plant
The Halden plant is the main plant of Nexans Norway and is the competence center for high-voltage submarine power cables and umbilicals within Alcatel´s cable activities. At this plant, research and development are carried out on a comprehensive array of power cables. The plant, located on the Oslofjord, was built for the production of the company´s ﬁrst Skagerrak cables in the early 1970´s. Since its erection, it has continuously been enlarged and upgraded in order to accommodate developments in the ﬁeld of paperinsulated high-voltage cables for AC and DC applications, as well as for the production of high-voltage XLPE (cross-linked polyethylene) insulated cables, composite cables and umbilicals for the offshore industry. With a ﬂexible layout and the most modern and efficient production machinery, the Halden plant supplies the most competitive cable system solutions to power utilities and the offshore industry the world over.
The Halden plant is equipped for handling cables of extra long length and heavy weight. The plant´s layout and processes are designed to meet all special manufacturing and handling requirements for large, highvoltage cables and umbilicals, and the facility is currently able to produce cables with conductors up to 2,500 mm2, and paper-insulated cables for voltages up to 765 kV AC.
XLPE insulated cables
In 1994, an entirely new production line for XLPE cables was put into operation. The extrusion of XLPE is performed in a tower over 100 meters high. The extrusion of the conductor screen, insulation and insulation screen is performed in a single operation utilizing four extruders and one extruder head. The curing and cooling take place in a dry atmosphere of pressurized nitrogen. Special attention is given to the handling of materials, particularly in respect to cleanliness. The raw material is fed into the extruder through a completely closed system. In the manufacturing of high-voltage cables, a special super-clean grade of material is employed in order to ensure the highest degree of purity.
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Design and engineering
Power transmission systems are of vital importance, and it is essential that they should function reliably year in and year out. Since 1915, when we entered the power cable ﬁeld, we have been continuously engaged in cable production and the planning and construction of power links spanning some of the most difficult terrain in the world – trackless mountains, deep fjords and wide expanses of open sea. In these projects we have gained unequalled experience, which...
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