Home

The COBRA Fiber Optic Cable is a 325km dark fiber G.654.D low loss cable between Eemshaven in the Netherlands and Endrup (Esbjerg) in Denmark via the German sector of the North Sea.

The COBRA Fiber Optic Cable can be connected to a subsea cable to the UK in Esbjerg, and a subsea cable to Norway in Bulbjerg.

The COBRA Fiber Optic Cable has been laid alongside the COBRAcable HVDC submarine electricity interconnector.

The COBRA Fiber Optic Cable has primarily been installed to control the HVDC electricity interconnector,  the remaining capacity is used for commercial purposes.

Both the COBRA Fiber Optic Cable and the COBRAcable HVDC submarine cable electricity interconnector are owned by TenneT TSO and Energinet. The Dutch company Relined Fiber Network is responsible for leasing the dark fiber capacity on the COBRA Fiber Optic Cable.

The COBRA cable forms a completely redundant and low latency route to Denmark. Running over the COBRA cable, the latency from Copenhagen to Amsterdam is less than 9ms (leading latency has been 11.5 ms), and latency from Copenhagen to London is 13.8 ms (leading latency has been 16.7 ms).

About the COBRAcable

The COBRAcable has been designed to facilitate the direct transport of wind energy generated at offshore wind farms, facilitating the transport of renewable energy and enhancing the security of supply.

COBRAcable is a 325km HVDC submarine cable electricity interconnector between Eemshaven in the Netherlands and Endrup in Denmark via the German sector of the North Sea.The COBRAcable submarine cable directly interconnects the high-voltage grids of the Netherland and Denmark. The COBRAcable has a capacity of 700 MW and has been commissioned since 2019.