1.1 This part of IEC 62236 outlines the structure and the content of the whole series. Annex A describes the characteristics of the railway system which affect electromagnetic compatibility (EMC) behaviour. Phenomena excluded from this series 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. Safety considerations are not covered by this series of standards. The biological effects of non-ionising radiation as well as apparatus for medical assistance, such as pacemakers, are not considered in this series. 1.2 This part of IEC 62236 is supplemented by the following specific standards: IEC 62236-2 Railway applications – Electromagnetic compatibility – Part 2: Emission of the whole railway system to the outside world IEC 62236-3-1 Railway applications – Electromagnetic compatibility – Part 3-1: Rolling stock – Train and complete vehicle IEC 62236-3-2 Railway applications – Electromagnetic compatibility – Part 3-2: Rolling stock – Apparatus IEC 62236-4 Railway applications – Electromagnetic compatibility – Part 4: Emission and immunity of the signalling and telecommunications apparatus IEC 62236-5 Railway applications – Electromagnetic compatibility – Part 5: Emission and immunity of fixed power supply installations and apparatus