| Abstract |
For the strengthening of the railway service on the connection Italy-Austria-Germany, FS ordered, at the end of 1993, 20 units of a new multi-voltage locomotive, called Class E412. The locomotive, having a full adhesion and a mass of 87 tons, is able to develop a continuous power at wheels of 6000
kW, until a speed of 200 km/h. The double star asynchronous motors are supplied at variable frequency and voltage by means of an oil-cooled GTO
converter that allows service below 3 kV d.c. lines and under 15 kV 16 2/3 Hz lines. Service is also assured at reduced performance under a 1,5 kV d.c. line. During the d.c. operation, the main transformer assures also the function of line filter. In a.c. service, the transformer supplies a double-stage converter. In d.c. service, all the converter modules operate as
inverters and each of them separately supplies one of the motor stars. This solution consents the maximum reduction of weight, though using single axle drive. The regenerative and/or rheostatic electric braking is able to work in d.c. and a.c. service.
The control electronics, based on the MICAS S2 series, is an integrated and uniform system. Transmission of all
machine signals on a redundant fibre-optics bus helps to reduce harness to a minimum and ensures noise-free
operation. The locomotive is equipped with several diagnostic and remote control systems. |
