Jan De Nul has completed installation work on the two sea cables connecting TenneT’s substation at the Hollandse Kust Hollandse Kust (noord) and (west Alpha) wind farms to the mainland.
The 220-kV high-voltage tests of both sea and land cables for Hollandse Kust (noord) also were successfully completed, from the onshore substation to the substation located 18km offshore.
The cable installation vessel Isaac Newton installed the cables on the seabed. In addition, Jan De Nul used several remote-controlled underwater trenchers and amphibious cranes in the surf zone to bury and protect the cable in the seabed.
In the spring, the Isaac Newton collected the first lot of 90km of sea cable from Jan De Nul’s consortium partner LS Cable & System in South Korea. After arriving in the Netherlands, the Isaac Newton installed four different sea cables, starting from the beach.
After the summer high season, in October, Jan De Nul completed this first installation campaign by burying the two cable sections for Hollandse Kust (west Alpha) from the beach up to 3km offshore.
Jan De Nul still needs to install two more cable sections to connect the future wind farm Hollandse Kust (West Alpha) to the grid.
Jan De Nul’s cable installation vessel Connector will collect the first in South Korea, transport it to the Netherlands and then install it. The Isaac Newton will again be deployed for transporting and installing the final sea cable section.
Manager for Offshore Cables at Jan De Nul Group Wouter Vermeersch said: “The Hollandse Kust (noord) and (west Alpha) project showcases our expertise in cable installation works. Jan De Nul has a very modern cable installation fleet, with three large cable installation vessels, supporting trenchers and amphibious cranes.”