You're right. There don't appear to be any 25 kV rail systems in Switzerland. https://en.wikipedia.org/wiki/List_of_current_systems_for_electric_rail_traction#

You're right. There don't appear to be any 25 kV rail systems in Switzerland. https://en.wikipedia.org/wiki/List_of_current_systems_for_electric_rail_traction#15_kV_AC.2C_16.C2.A02.E2.81.843.C2.A0Hz_.2816.7_Hz.29 https://en.wikipedia.org/wiki/List_of_current_systems_for_el...