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HIGH VOLTAGE CABLES


A POWERFUL HERITAGE


Global Marine Systems Limited is unique in the modern world of subsea cable laying. They were there when the first ever copper cables were laid under the English Channel and Atlantic Ocean in the 1850’s in order to enable communication between continents.


Today, the technology has changed but the company continues to build on this legacy by laying copper cable to transmit the power generated by wind turbines on the Wikinger windfarm in support of the Prysmian Group.


DIVERSE CAPABILITIES Along the way, the team at Global Marine has been able to demonstrate the company’s diverse capabilities in the


offshore power and renewables markets with a number of firsts and major projects. In fact, in 2002, the company installed 85km of cable at Horns Rev, Denmark, Europe’s first-ever commercial windfarm. From there, the company installed the cables connecting the Kentish Flats windfarm, the first UK commercial project and can lay claim to having installed 17% of the inter-array cables in service today.


INTER-CONNECTOR MARKET In the inter-connector market, the company linked Estonia to Finland with the high voltage Estlink cable. Working with ABB, the company was required to bundle and simultaneously lay two, 77km high voltage cables weighing approximately 4,000 tonnes.


Burial depth requirements were precise to take into account the high thermal conductivity of subsea soil. The final stage involved floating the cable end ashore for connection to the Estonian mainland.


FURTHER CHALLENGES


Global Marine faced further challenges when it was chosen to add the Malaysian island of Pulau Ketam on the power transmission grid for the first time. The project involved burying the cable to depths of up to 13.8 metres beneath the seabed, the deepest in the company’s history and possibly the deepest cable burial achieved anywhere in the world. Providing power to Margarita Island from the Venezuelan mainland provides another good illustration of the company’s expertise in this field.


TRANSFERRABLE EXPERTISE Transferrable expertise is one of the key reasons behind the company’s success in the power sector. With a 165-year legacy in subsea engineering across many markets, customers benefit from access to one of the industry’s most capable fleets, in terms of assets and seafarer skills.


Global Marine Systems Limited Click to view more info


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www.windenergynetwork.co.uk


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