Rhaetian Railway Ge 4/4 III

The Ge 4/4 III is a class of twelve metre gauge electric locomotives of the Rhaetian Railway in the canton of Graubünden, Switzerland, numbered 641 to 652. It is the third Ge 4/4 class the railway acquired. After the Vereina Tunnel opened and traffic rose sharply, the railway joined Swiss Locomotive and Machine Works and ASEA Brown Boveri in 1989 to develop a universal four-axle locomotive with an AC drive using GTO thyristors, able to work tight curves. The first machine entered service on 7 December 1993 and eleven more followed by 1999. The class runs on 11 kV AC at 16 2/3 Hz, produces 2,400 kilowatts, has a top speed of 100 kilometres per hour, and now leads most trains on the Albula Railway and all car trains through the Vereina Tunnel.