Nexans has completed the Nexans Tyrrhenian Link installation, reaching a record 2,150-meter subsea cable laying depth for a 500 kV HVDC connection. This milestone marks a major step forward in deep-water cable installation and strengthens the role of subsea interconnections in modern power grids.
Record-Breaking Installation and Project Scope
Nexans achieved the record during offshore operations in December 2025 and confirmed it on January 1, 2026. The final pull-in connected Terra Mala in Sardinia to Fiumetorto in Sicily, completing the western section of the project.
Developed by Terna, the Tyrrhenian Link will connect Sardinia, Sicily, and mainland Italy through a 500 kV HVDC system. Nexans installed approximately 480 km of subsea cable across two campaigns. In total, the full project will include two links of about 970 km each and deliver 1,000 MW of transmission capacity.
Advanced Engineering Enables Deep-Water Success
The Nexans Tyrrhenian Link installation required precise planning and execution. Teams conducted detailed seabed mapping, optimized cable routes, and carefully controlled tension during installation.
In addition, engineers coordinated closely with survey teams, ROV operators, and vessel crews aboard the Nexans Aurora. This approach ensured accuracy and stability throughout both the cable laying and final connection phases.
Supporting Grid Reliability and Future Energy Demand
Nexans demonstrated its engineering expertise and operational capability by completing the installation safely and efficiently. Project leaders emphasized the importance of precision across engineering, manufacturing, and offshore operations.
At the same time, Terna continues to strengthen Italy’s grid with advanced infrastructure that supports energy security and renewable integration.
Overall, this achievement sets a new benchmark for deep-water HVDC cable systems. As demand for interconnections and clean energy transmission grows, projects like the Tyrrhenian Link will play a critical role in modernizing power networks.
