The cable system and accessories were produced at our state-of-the-art facility in Cologne, Germany. To minimize construction time, we also designed a special logistics concept and established a storage place in the Netherlands.
We managed to overcome the challenges of the cable route. Together with TenneT and the authorities we decided to install plastic tubes through horizontal drilling to minimize adverse effects. There were drillings of up to 530 m with a total length of more than 50 km. To act in an environmentally friendly way in the complex landscape, we used a very narrow working area.
NKT provided a 380 kV connection with dual systems consisting of 132 km of 380 kV XLPE cable, partly with integrated optical fibres. Our specialists performed all installations, whereof some needed to take place simultaneously to match the project schedule.
We used our own test trailers plus two additional ones for the onsite testing, and completed the final high-voltage test at 374 kV for one hour on all cables and accessories. Partial discharge measurement was also performed on all accessories.
This successful project demonstrates our outstanding competence in handling projects to customer’s benefit by responding to their needs and providing cost-efficient, ecological solutions. The Randstad380 Zuidring project is a remarkable milestone – not only for us at NKT.