scope:

This part 1 of the European Standards series EN 50121 outlines the structure and the content of the whole set. Annex A describes the characteristics of the Railway System which affect electromagnetic compatibility (EMC) behaviour. Annex B specifies a management process for achieving (EMC) at the interface between the railway infrastructure, as defined in the EU Directive 91/440 EEC, and trains. The objective of the whole set of Standards is to specify the EM emission and immunity requirements for railway products, and for railway as an installation. Phenomena excluded from the set are Nuclear EM pulse, abnormal operating conditions and the induction effects of direct lightning strike. Emission limits at the railway boundary do not apply to intentional transmitters within the railway boundaries. The biological effects of non-ionising radiation as well as apparatus for medical assistance, such as pacemakers, are not considered here. This European Standard is supplemented by the following specific standards: EN 50121-2:Railway applications - Electromagnetic compatibility - Part 2: Emission of the whole railway system to the outside world EN 50121-3-1: Railway applications - Electromagnetic compatibility - Part 3-1: Rolling stock - Train and complete vehicle EN 50121-3-2: Railway applications - Electromagnetic compatibility - Part 3-2: Rolling stock - Apparatus EN 50121-4: Railway applications - Electromagnetic compatibility - Part 4: Emission and immunity of the signalling and telecommunications apparatus EN 50121-5: Emission and immunity of fixed power supply.