Nexans has completed the high-voltage subsea cable installation on the Tyrrhenian Link Project in Italy, confirming a world-record installation depth of 2,150 meters for a 500 kV high-voltage direct current (HVDC) subsea cable.
Nexans achieved the world record during an offshore installation campaign in December 2025, as part of its work for Terna, the Italian Transmission System Operator. The Tyrrhenian Link is a strategic 500 kV HVDC interconnection designed to strengthen Italy’s national transmission grid.
The offshore execution milestone was finalised with the successful completion of the second pull-in operation on January 1, 2026, establishing the physical connection between the cable landing points in Terra Mala (Sardinia) and Fiumetorto (Sicily). This operation marks the completion of all high-voltage subsea cable-laying activities for the project.
The western section of the Tyrrhenian Link, within Nexans’ scope of work, comprises approximately 480 km of deep-water subsea cable, installed over two offshore campaigns of around 200 km and 280 km, respectively. The Tyrrhenian Link consists of two 500 kV HVDC subsea connections, each approximately 970 km long, with a total transmission capacity of 1,000 MW.
By setting a new world record and completing the high-voltage subsea cable installation, Nexans once again demonstrates its capability to deliver complex, deep-water HVDC projects with technical excellence and operational rigour.
Original announcement: Nexans
Image: Courtesy of Nexans
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