Swissgrid, the national company in charge of Switzerland’s electricity transmission grid, has chosen Nexans through a bidding process for the project of burying the Very High Voltage (VHV) overhead power lines along the southern side of the Geneva-Cointrin airport. Replacing the overhead cables with underground cables will free up large tracts of land destined for urban development in the greater Geneva area.

Nexans was chosen for this €25 million turnkey contract for its ability to produce and install very high voltage cables and offer engineering services and for its experience managing complex projects.

The Swissgrid project is part of the “Axe Stratégique Réseau” development programs in the canton of Geneva and the Federal Roads Office’s “Redevelopment of the Grand-Saconnex motorway junction”. In the overhead power line burial project, exceptional by its complex nature, both technical and organisational, Nexans will be in charge of certain engineering services and taking down and replacing gas-isolated links. In addition to producing and installing nearly 30 km of very high voltage cables between the electrical stations of Foretaille and Renfile, Nexans will also install two 144-strand fibre optic links and embed a temperature monitoring feature in the cable system.

“We welcome the opportunity to continue our work with Swissgrid on this ambitious and prestigious project, relying on the many and varied skills of the Nexans teams – from engineering to civil works, but also including the production and installation of very high voltage networks”, says Marco Spinelli, CEO of Nexans Switzerland.

As a leader on Switzerland’s very high voltage market, Nexans has already successfully led several urban projects in Basel, Lausanne, Geneva, Bern, and Zurich. Nexans Switzerland has also been entrusted with complex, very high-voltage cable connection projects, such as the connection of the Nant de Drance (2018) and Linth-Limmern (2016) pumped storage power plants to the national grid and the underground cable connection of La Bâtiaz – Le Verney (2022).

Image source: Courtesy of Nexans

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