BS EN 50121-2:2017 – TC:2020 Edition
$186.33
Tracked Changes. Railway applications. Electromagnetic compatibility – Emission of the whole railway system to the outside world
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 60 |
This European Standard is intended to define the electromagnetic environment of the whole railway system including urban mass transit and light rail system. It describes the measurement method to verify the emissions, and gives the cartography values of the fields most frequently encountered. This European Standard specifies the emission limits of the whole railway system to the outside world. The emission parameters refer to the particular measuring points defined in Clause 5. These emissions should be assumed to exist at all points in the vertical planes which are 10 m from the centre lines of the outer electrified railway tracks, or 10 m from the fence of the substations. Also, the zones above and below the railway system may be affected by electromagnetic emissions and particular cases need to be considered individually. These specific provisions need to be used in conjunction with the general provisions in EN 50121-1. For existing railway lines, it is assumed that compliance with the emission requirements of EN 50121-3-1, EN 50121-3-2, EN 50121-4 and EN 50121 5 will ensure the compliance with the emission values given in this part. For newly build railway systems it is best practice to provide compliance to the emission limits given in this part of the standard (as defined in the EMC plan according to EN 50121-1).
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 37 | 1 Scope 2 Normative references 3 Terms, definitions and abbreviations 3.1 Terms and definitions |
| 38 | 3.2 Abbreviations 4 Emission limits 4.1 Emission from the open railway system during train operation 4.2 Radio frequency emission from railway substations |
| 39 | 5 Method of measurement of emission from moving rolling stock and substations 5.1 General and specific measurement parameters 5.1.1 General measurement parameters 5.1.1.1 Frequency bands 5.1.1.2 Measurement uncertainty 5.1.1.3 Types of antennas |
| 40 | 5.1.1.4 Measurement distance and height |
| 41 | 5.1.1.5 Values of measurement 5.1.1.6 Antenna position and orientation 5.1.1.7 Ambient noise 5.1.2 Measurement parameter for moving trains |
| 42 | 5.1.3 Measurement parameter for railway substations 5.2 Acquisition methods 5.2.1 General |
| 43 | 5.2.2 Fixed frequency method 5.2.3 Frequency sweeping method 5.3 Transients 5.4 Measuring conditions 5.4.1 Weather conditions |
| 44 | 5.4.2 Railway system operating modes 5.4.3 Multiple sources from remote trains 5.5 Test report |
| 50 | Annex A (informative)Background to the method of measurement A.1 Introduction A.2 Requirement for a special method of measurement A.3 Justification for a special method of measurement |
| 51 | A.4 Frequency range A.5 Antenna positions A.6 Conversion of results if not measured at 10 m A.7 Measuring scales A.8 Repeatability of results |
| 52 | A.9 Railway system conditions A.9.1 Weather A.9.2 Speed, traction power A.9.3 Multiple sources from remote trains A.10 Number of traction vehicles per train |
| 53 | Annex B (informative)Cartography — Electric and Magnetic fields at traction frequencies |
| 54 | Annex C (informative)Emission values for lower frequency range |
