NKT Qualifies 525 kV HVDC Subsea Cable for 90 °C Operation
NKT has launched a fully qualified 525 kV HVDC power cable system designed for operation at a conductor temperature of 90 °C. This enhancement allows for increased transmission capability, strengthening the company's HVDC portfolio for offshore applications.

Danish cable manufacturer NKT has achieved full qualification for its new 525 kV HVDC subsea power cable system, enabling operation at a conductor temperature of 90 degrees Celsius. This technological advancement significantly increases the transmission capacity of cable connections, which is crucial for the more efficient functionality of offshore wind farms and grid connections.
Historically, the operation of HVDC cables has been limited to lower temperatures. NKT's new solution permits the transmission of higher power levels with the same cable dimensions. This development has the potential to reduce the costs and environmental impact of new subsea cable projects by achieving necessary transmission capacity with a reduced amount of cable.
The company announced the new cable system on Monday. It is expected to bolster NKT's market position in high-voltage direct current (HVDC) systems, particularly within the expanding sector of offshore energy transmission. This upgrade to the company's product range supports the global transition towards renewable energy sources and their integration into power grids.
NKT is recognized as one of the world's leading manufacturers of high-voltage cables, with substantial investments in research and development aimed at improving product performance. The 90 °C operating temperature qualification represents a notable achievement that could influence future infrastructure projects in Europe and globally.