Prysmian Group reached a key milestone with its Prysmian Group 525 kV HVDC cable development. The company created and tested the world’s first 525 kV extruded submarine cable system for High Voltage Direct Current (HVDC) use. This breakthrough pushes clean energy technology forward and strengthens global power grid innovation.
Prysmian Group 525 kV HVDC Cable Raises the Bar
The new cable system can transmit more than 2.5 gigawatts (GW) of power. That’s over twice the capacity of current 320 kV DC systems. Prysmian completed a one‑year qualification program that met CIGRE TB‑496 standards and earned independent third‑party certification. As a result, the system proves high performance and solid reliability.
“This achievement reinforces our leadership in developing power grid infrastructure that supports the global energy transition,” said Valerio Battista, CEO of Prysmian Group.
Driving the Clean Energy Transition
HVDC systems allow efficient electricity transfer across long distances and between countries. With the Prysmian Group 525 kV HVDC cable, the company strengthens its ability to deliver large‑scale submarine interconnectors. These links are vital for connecting offshore wind farms to national grids and expanding renewable power capacity.
This success also builds on earlier progress with 525 kV HVDC underground cables used in Germany’s grid projects. “Now, we’re applying the same innovation to submarine systems,” explained Hakan Ozmen, Executive Vice President of Prysmian’s Projects Business Unit. “This approach helps reduce costs for offshore wind and limits environmental impact.”
Engineering Excellence Behind Every Cable
Prysmian combined materials science expertise with precision manufacturing to reach this milestone. The production process was fine‑tuned for stability, accuracy, and efficiency. The full system includes flexible factory joints, rigid repair joints, and sea‑land joints—all designed for strong dielectric performance and long service life.
Through this achievement, Prysmian continues to lead in sustainable energy transmission and helps accelerate the world’s move toward a cleaner power future.
