The Energy Management System (EMS) optimises energy production and transmission between the power station and the catenary, while the Traction Current System (FSL) controls and monitors current flow in the overhead electrification.

The two systems were rolled out in phases during 2013. "This means that we have completely replaced the nervous system of our energy network without any negative impacts on our customers," says head of SBB's infrastructure division Mr Philippe Gauderon.

Both EMS and FSL are fully redundant and can be switched to a back-up system at any time.

EMS covers power generation and transmission for the entire SBB network from a new purpose-built control centre at Zollikofen near Berne.

FSL replaces three different life-expired systems, and is monitored and controlled from four operating centres around Switzerland.