This European Standard applies to emission and immunity aspects of EMC for electrical and electronic
apparatus intended for use on railway rolling stock. EN 50121-3-2 applies for the integration of
apparatus on rolling stock.
The frequency range considered is from d.c. to 400 GHz. No measurements need to be performed at
frequencies where no requirement is specified.
The application of tests shall depend on the particular apparatus, its configuration, its ports, its
technology and its operating conditions.
This standard takes into account the internal environment of the railway rolling stock and the external
environment of the railway, and interference to the apparatus from equipment such as hand-held radio
transmitters.
If a port is intended to transmit or receive for the purpose of radio communication (intentional radiators,
e.g. transponder systems), then the emission and immunity limits in this standard at the
communication frequency do not apply.
This standard does not apply to transient emissions when starting or stopping the apparatus.
The objective of this standard is to define limits and test methods for electromagnetic emissions and
immunity test requirements in relation to conducted and radiated disturbances.
These limits and tests represent essential electromagnetic compatibility requirements.
Emission requirements have been selected so as to ensure that disturbances generated by the
apparatus operated normally on railway rolling stock do not exceed a level which could prevent other
apparatus from operating as intended.
Likewise, the immunity requirements have been selected so as to ensure an adequate level of
immunity for rolling stock apparatus.
The levels do not however cover extreme cases which may occur with an extremely low probability of
occurrence in any location. Specific requirements which deviate from this standard shall be specified.
Test requirements are specified for each port considered.
These specific provisions are to be used in conjunction with the general provisions in EN 50121-1.
BS EN 50121-3-2:2006 Referenced Document
EN 50121-1 Railway applications - Electromagnetic compatibility - Part 1: General*， 2017-01-01 Update
EN 50121-3-1 Railway applications - Electromagnetic compatibility - Part 3-1: Rolling stock - Train and complete vehicle (Incorporates Amendment A1: 2019)*， 2017-01-01 Update
EN 50155 Railway Applications Electronic Equipment Used on Rolling Stock
EN 55011 Industrial, scientific and medical equipment - Radio-frequency disturbance characteristics - limits and methods of measurement
EN 55016-1-1 Specification for radio disturbance and immunity measuring apparatus and methods - Part 1-1: Radio disturbance and immunity measuring apparatus - Measuring apparatus (Incorporates Amendment A1: 2010)*， 2010-03-01 Update
EN 55022 Information technology equipment - Radio disturbance characteristics - Limits and methods of measurement (Incorporating corrigendum October 2011)*， 2024-04-18 Update
EN 61000-4-2 Electromagnetic compatibility (EMC) - Part 4-2: Testing and measurement techniques - Electrostatic discharge immunity test*， 2009-03-01 Update
EN 61000-4-3 Electromagnetic compatibility (EMC) - Part 4-3: Testing and measurement techniques - Radiated, radio-frequency, electromagnetic field immunity test*， 2009-02-26 Update
EN 61000-4-4 Electromagnetic Compatibility (EMC) - Part 4-4: Testing and Measurement Techniques - Electrical Fast Transient/Burst Immunity Test (Incorporates Amendment A1: 2001)
EN 61000-4-5 Electromagnetic Compatibility (EMC) - Part 4-8: Testing and Measurement Techniques - Power Frequency Magnetic Field Immunity Test Including Amendment A1: 2001; IEC 61000-4-8: 1993 + A1: 2000; Remains Current
EN 61000-4-6 Electromagnetic Compatibility (EMC) - Part 4-6: Testing and Measurement Techniques - Immunity to Conducted Disturbances@ Induced by Radio-Frequency Fields (Incorporates Amendment A1: 2001)
EN 61000-6-1 Electromagnetic compatibility (EMC) - Part 6-1: Generic standards - Immunity for residential, commercial and light-industrial environments*， 2007-01-01 Update