In a major technological milestone, French cable manufacturer Nexans has successfully completed deep-sea testing of a 525 kV high-voltage direct current (HVDC) submarine cable at a depth of 3,000 metres. The test demonstrated performance 30% higher than industry standards, confirming the cable’s reliability and robustness under extreme conditions.
Supporting the Great Sea Interconnector
The trial was conducted as part of Nexans’ work on the Greece–Cyprus interconnector project, known as the Great Sea Interconnector — a strategic electricity link being developed by the Hellenic Electricity Distribution Network Operator (HEDNO), acting on behalf of the Greek transmission system operator IPTO (Independent Power Transmission Operator).
A New Benchmark for Deep-Sea Power Transmission
Pascal Ranty, Executive Vice President at Nexans, commented: “Reaching a depth of 3,000 metres sets a new benchmark for offshore power transmission. Combined with our previous record of 2,150 metres achieved earlier this year on the Tyrrhenian Link project, it underscores Nexans’ leadership in HVDC technology. This achievement reflects decades of expertise and the continued drive of our engineering teams to push technological boundaries.”