This European Standard specifies the requirements for the performance of all fixed installationselectronic power converters, using controllable and/or non-controllable electronic valves,intended for traction power supply.The devices can be controlled by means of current, voltage or light. Non-bistable devices areassumed to be operated in the switched mode.This European Standard applies to fixed installations of following electric traction systems:− railways,− guided mass transport systems such as: tramways, light rail systems, elevated andunderground railways, mountain railways, trolleybusses.This European Standard does not apply to− cranes, transportable platforms and similar transportation equipment on rails,− suspended cable cars,− funicular railways.This European Standard applies to diode rectifiers, controlled rectifiers, inverters and frequencyconverters.The equipment covered in this European Standard is the converter itself.