Nexans qualifies its 525 kV HVDC underground cable

14 December 2018

Nexans has successfully qualified its HVDC cable systems for the German TSOs for operation at 525 kV. Germany’s four TSOs – 50Hertz, Amprion,TenneT and TransnetBW – were looking for a significant increase in power capacity over the industry-standard 320 kV HVDC, primarily to optimise their investment in cables and civil works for carrying renewable energy over long distances. 

Nexans developed its system, based on a triple extruded cross-linked polyethylene (XLPE) insulation design, to operate at the ground breaking voltage of 525 kV, with a power rating of 2 GW. In a one-year test programme under real outdoor installation conditions at the third party test facility STRI in Sweden with ambient temperatures from -20°C during winter time and up to +31°C during summer time, the cable system has successfully demonstrated its reliability and performance.

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