Femern, the client for the tunnelling project, stated it will require significant power to keep the electricity-powered trains running and to ensure stable operations and a high level of safety in the tunnel.

The existing electricity grid on Lolland does not have the capacity to supply the energy required for train operations as well as the electrical and mechanical system. A new large substation is, therefore, required. It will be built close to the tunnel’s ramp and portal facility at Rødbyhavn.

Johnny Restrup-Sørensen, contract director at Femern A/S, said: "It’s very gratifying that so many companies are interested in tendering for the work. It indicates that interest in being part of the project is great and this will assist us in ensuring that we will find the best supplier to take on the assignment."