prEN 50121-3-1:2025
(Main)Railway applications - Electromagnetic compatibility - Part 3-1: Rolling stock - Train and complete vehicle
Railway applications - Electromagnetic compatibility - Part 3-1: Rolling stock - Train and complete vehicle
This document specifies the emission limits and immunity requirements for all types of rolling stock. It covers traction stock, hauled stock and trainsets including urban vehicles for use in city streets. The scope of this part of the standard ends at the interface of the rolling stock with its respective energy inputs and outputs. In the case of locomotives, trainsets, trams etc., this is the current collector (pantograph, shoe gear). In the case of hauled stock, this is the AC or DC auxiliary power connector. However, since the current collector is part of the traction stock, it is not entirely possible to exclude the effects of this interface with the power supply line. The slow moving test has been designed to minimize these effects. The frequency range from 150 kHz to 1 GHz is considered sufficient to protect the environment in the whole frequency range from 0 Hz (DC) to 400 GHz. For demonstration of compatibility in this document only measurements at the specified frequencies are required.
Bahnanwendungen - Elektromagnetische Verträglichkeit - Teil 3-1: Bahnfahrzeuge – Zug und gesamtes Fahrzeug
Applications ferroviaires - Compatibilité électromagnétique – Partie 3-1 Matériel roulant – Trains et véhicules complets
Le présent document spécifie les exigences d’émission et d’immunité pour tous les types de matériel roulant. Elle s’applique au matériel de traction, au matériel remorqué et aux rames, y compris les véhicules de transport urbain. Le domaine d’application de la présente partie de la norme s’arrête à l’interface du matériel roulant avec ses entrées et sorties d’énergie respectives. Dans le cas des locomotives, des rames, des tramways, etc., il s’agit du collecteur de courant (pantographe, frotteur). Dans le cas du matériel remorqué, il s’agit du connecteur de puissance auxiliaire en courant alternatif ou en courant continu. Cependant, comme le collecteur de courant fait partie du matériel de traction, il n’est pas complètement possible d’exclure les effets de cette interface avec la ligne d’alimentation en énergie. L'essai à faible vitesse a été conçu pour minimiser ces effets. La gamme de fréquences de 150 kHz à 1 GHz est considérée comme suffisante pour protéger l'environnement dans toute la gamme de fréquences de 0 Hz (CC) à 400 GHz. Pour la démonstration de la compatibilité dans ce document, seules les mesures aux fréquences spécifiées sont requises.
Železniške naprave - Elektromagnetna združljivost - 3-1. del: Vozna sredstva - Vlak in celotno vozilo
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2025
Železniške naprave - Elektromagnetna združljivost - 3-1. del: Vozna sredstva - Vlak
in celotno vozilo
Railway applications - Electromagnetic compatibility - Part 3-1: Rolling stock - Train and
complete vehicle
Bahnanwendungen - Elektromagnetische Verträglichkeit - Teil 3-1: Bahnfahrzeuge – Zug
und gesamtes Fahrzeug
Applications ferroviaires - Compatibilité électromagnétique – Partie 3-1 Matériel roulant –
Trains et véhicules complets
Ta slovenski standard je istoveten z: prEN 50121-3-1:2025
ICS:
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
45.060.01 Železniška vozila na splošno Railway rolling stock in
general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD DRAFT
prEN 50121-3-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2025
ICS 45.060.01; 45.140; 33.100.01 Will supersede EN 50121-3-1:2017; EN 50121-3-
1:2017/A1:2019
English Version
Railway applications - Electromagnetic compatibility - Part 3-1:
Rolling stock - Train and complete vehicle
Applications ferroviaires - Compatibilité électromagnétique - Bahnanwendungen - Elektromagnetische Verträglichkeit -
Partie 3-1 Matériel roulant - Trains et véhicules complets Teil 3-1: Bahnfahrzeuge - Zug und gesamtes Fahrzeug
This draft European Standard is submitted to CENELEC members for enquiry.
Deadline for CENELEC: 2025-10-24.
It has been drawn up by CLC/TC 9X.
If this draft becomes a European Standard, CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard was established by CENELEC in three official versions (English, French, German).
A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to
the CEN-CENELEC Management Centre has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 79749 Ref. No. prEN 50121-3-1:2025 E
1 Contents Page
2 European foreword . 3
3 Introduction . 5
4 1 Scope . 6
5 2 Normative references . 6
6 3 Terms definitions and abbreviations . 6
7 3.1 Terms and definitions . 6
8 3.2 Abbreviations . 7
9 4 Overall aspects . 7
10 5 Emission . 8
11 5.1 General . 8
12 5.2 Interference on outside party telecommunication lines . 8
13 5.3 Radiated electromagnetic disturbances . 8
14 5.3.1 Test site . 8
15 5.3.2 Test conditions . 9
16 5.3.3 Emission limits . 9
17 6 Immunity . 11
18 Annex A (informative) Interference on telecommunication lines . 12
19 A.1 Harmonics in the traction current . 12
20 A.1.1 General . 12
21 A.1.2 Relationship between currents in railway system and noise on telecommunication lines . 12
22 A.2 Psophometric current definition . 13
23 A.3 Limits and test conditions . 13
24 A.4 Measurement of the psophometric current . 14
25 A.5 Calculation of the overall psophometric current of a trainset . 14
26 A.5.1 Current of one tractive unit. 14
27 Annex B (informative) Radiated electromagnetic disturbances - Measurement procedure . 16
28 B.1 Purpose . 16
29 B.2 Measuring equipment and test method . 16
30 Annex C (informative) Emission values for lower frequency range. 17
31 Annex D (informative) Justification of limits . 20
32 D.1 Rationale of the emission limits . 20
33 D.2 Addition of field strength . 21
34 Bibliography . 24
36 European foreword
37 This document (prEN 50121-3-1:2025) has been prepared by CLC/TC 9X “Electrical and electronic applications
38 for railways”.
39 This document is currently submitted to the Enquiry.
40 The following dates are proposed:
• latest date by which the existence of this (doa) dav + 6 months
document has to be announced at national
level
• latest date by which this document has to be (dop) dav + 12 months
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) dav + 36 months
conflicting with this document have to be (to be confirmed or
withdrawn modified when voting)
41 This document has been prepared according to Decision 69/09 taken during the TC 9X meeting.
42 This document will supersede EN 50121-3-1:2017.
43 prEN 50121-3-1:2025 includes the following significant technical changes with respect to EN 50121-3-1:2017:
44 — clarification of scope, last paragraph;
45 — update of normative references;
46 — new definition 3.1.5 unit;
47 — new Clause 4 overall aspects;
48 — update of Clause 5 emission including Figures 1 and 2;
49 — update of Clause 6 immunity;
50 — update of normative Annex B, B.2 measuring equipment and test method;
51 — update of informative Annex C including Figures C.1 and C.2;
52 — introduction of new informative Annex D with justification of limits;
53 — deletion of Annex ZZ.
54 This document is read in conjunction with EN 50121-1:2025.
55 This standard forms Part 3-1 of the EN 50121 series published under the general title “Railway applications -
56 Electromagnetic compatibility”. The series consists of:
57 — Part 1: General;
58 — Part 2: Emission of the whole railway system to the outside world;
59 — Part 3-1: Rolling stock - Train and complete vehicle;
60 — Part 3-2: Rolling stock – Apparatus;
61 — Part 4: Emission and immunity of the signalling and telecommunications apparatus;
62 — Part 5: Emission and immunity of fixed power supply installations and apparatus.
63 Introduction
64 High power electronic equipment, together with low power microcontrollers and other electronic devices, are
65 being installed on trains in great numbers. Electromagnetic compatibility has therefore become a critical issue
66 for the design of train-related apparatus as well as of the train as a whole.
67 This Product Standard for rolling stock sets limits for electromagnetic emission and immunity in order to ensure
68 a well-functioning system within its intended environment.
69 Immunity limits are not given for the complete vehicle. prEN 50121-3-2:2025 defines requirements for the
70 apparatus installed in the rolling stock, since it is impractical to test the complete unit. An EMC plan includes
71 equipment covered by this standard.
72 1 Scope
73 This document specifies the emission limits and immunity requirements for all types of rolling stock. It covers
74 traction stock, hauled stock and trainsets including urban vehicles for use in city streets.
75 The scope of this part of the standard ends at the interface of the rolling stock with its respective energy inputs
76 and outputs. In the case of locomotives, trainsets, trams etc., this is the current collector (pantograph, shoe
77 gear). In the case of hauled stock, this is the AC or DC auxiliary power connector. However, since the current
78 collector is part of the traction stock, it is not entirely possible to exclude the effects of this interface with the
79 power supply line. The slow moving test has been designed to minimize these effects.
80 The frequency range from 150 kHz to 1 GHz is considered sufficient to protect the environment in the whole
81 frequency range from 0 Hz (DC) to 400 GHz. For demonstration of compatibility in this document only
82 measurements at the specified frequencies are required.
83 2 Normative references
84 The following documents are referred to in the text in such a way that some or all of their content constitutes
85 requirements of this document. For dated references, only the edition cited applies. For undated references, the
86 latest edition of the referenced document (including any amendments) applies.
87 prEN 50121-1:2025, Railway applications - Electromagnetic compatibility - Part 1: General
88 prEN 50121-3-2:2025, Railway applications - Electromagnetic compatibility - Part 3-2: Rolling stock – Apparatus
89 EN IEC 55016-1-1:2019, Specification for radio disturbance and immunity measuring apparatus and methods -
90 Part 1-1: Radio disturbance and immunity measuring apparatus - Measuring apparatus (CISPR 16-1-1:2019)
91 IEC 60050-161:1990, International Electrotechnical Vocabulary. Chapter 161: Electromagnetic compatibility
92 3 Terms definitions and abbreviations
93 3.1 Terms and definitions
94 For the purposes of this document, the terms and definitions given in IEC 60050-161:1990 and the following
95 apply.
96 ISO and IEC maintain terminology databases for use in standardization at the following addresses:
97 — ISO Online browsing platform: available at https://www.iso.org/obp/
98 — IEC Electropedia: available at https://www.electropedia.org/
99 3.1.1
100 traction stock
101 electric and diesel locomotive, high speed trainset, elementary fixed combination of traction stock and hauled
102 stock, electric and diesel multiple unit (no locomotive, distributed traction equipment), Light Railway Vehicle
103 (LRV) such as tram, trolley bus or any other electrical vehicle for urban mass transit, underground trainset
104 3.1.2
105 hauled stock
106 independent passenger coaches and freight wagons (if they contain electric apparatus such as freezing
107 equipment) which can be hauled in random combinations by different types of locomotives
108 3.1.3
109 main line vehicle
110 vehicle mainly designed to operate between c
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