The world's largest fully water cooled hydro generators in the Bieudron Power Plant (Switzerland)

In 1993 the owner of the Val des Dir dam in Switzerland decided to increase the peak energy production by adding a new power station to the existing storage lake. In the article, the history of the project, the specification for the generators as well as the technical solution provided are described. Further on, the first results of the measurements done during commissioning are presented. The generators in the Bieudron power station are the world's largest fully water cooled machines in operation.