By NSW Press Release
Nordenham –Â Norddeutsche Seekabelwerke GmbH (NSW) will be laying for E.ON Hanse AG Germany's longest submarineÂ cable, measuring almost 53 kilometres. For supplying electricity to the island of Heligoland. Up toÂ now, the island's power supply has come from ageing diesel generators, which can no longer be reliedÂ upon for long-term trouble-free operation. But this year a new chapter in terms of energy provision is beginningÂ for the high-seas island: from St. Peter Ording, Heligoland will be connected to the mainland by aÂ submarine power cable. The project's total volume comes to around 20 million euros. Besides producingÂ and laying the cable, NWS will also be providing the requisite accessories. The 30-kV medium-voltageÂ cable will be manufactured in one piece, so that no maintenance-intensive joints will be required underÂ water.
The cable is scheduled to be laid early this year – using the NOSTAG 10 barge equipped by NSW. ThisÂ barge, a joint venture of companies from northern Germany, is specially designed for laying submarineÂ power cables for offshore wind farms and island links. With a length of more than 90 metres and a widthÂ of over 27 metres, plus a very substantial carrying capacity, it is ideal for the waters of the North and BalticÂ Seas, which will also be the principal areas of deployment.Â
“For us, this order is the gateway to island link business”, explains Rudolf Stahl, Managing Director ofÂ NSW. “Following the order we received last summer for the infield cabling of the RÃ¶dsand 2 offshore windÂ farm in Denmark, this is already the second project we've been entrusted with by a company in the E.ONÂ Group.” In the offshore category, two further orders have meanwhile been won in the North Sea: NSW isÂ equipping both the BARD Offshore 1 and the alpha ventus wind farms with submarine power cables. InÂ the case of alpha ventus, moreover, NSW will not only be producing the cables, but also laying them at aÂ depth of 30 metres.
The cable for Heligoland is being manufactured in the new submarine power cable production facility,Â which will be starting operation in mid-February. NSW has invested more than 40 million euros in buildingÂ it. Measuring over 7,000 square metres, the hall accommodates lines for stranding and armouring thatÂ rank among the most sophisticated and largest of their type worldwide. On the free area, revolving cableÂ storage devices are provided at the ends of the production lines for intermediate storage of the cables.
The cables produced on the new lines will be loaded through the firm's own pier facility, as is NSW's standardÂ practice.