The contract for the turnkey cable system project included the design, engineering and manufacturing of the submarine cable, as well as installation and offshore jointing.
The high-voltage submarine cable has steel armouring and three integrated fibre optics. Each metre of cable, which we produced in our state-of-the-art f2c factory in Cologne, weighs around 115 kg. Despite its heavy weight and its large diameter of 24 cm, we divided and delivered the total length of the submarine cable in a mere five sections.
The infield medium voltage submarine cables with integrated fibre optics for the connection of the turbines were manufactured in individual lengths of approximately 1,000 metres. The sections weighed up to 30 tons and were delivered on drums. Through this operation we were able to show that our modern logistics concept can ensure safe and punctual delivery at all times.
We managed to perform the installations and the assembly on the substation platform at 20 metres above water level, despite extreme wind and weather conditions. The offshore joints for the connection of the cable were installed by NKT jointers directly onsite on the decks of the installation vessels. While facing this challenge, our people demonstrated great versatility and the highest level of commitment. Many offshore projects have benefitted from the experience gained with Baltic 1.