EN 50121-1:2006

SLOVENSKI STANDARD
01-januar-2007
1DGRPHãþD
SIST EN 50121-1:2001
Železniške naprave - Elektromagnetna združljivost - 1. del: Splošno (vsebuje
popravek AC:2008)
Railway applications - Electromagnetic compatibility -- Part 1: General
Bahnanwendungen - Elektromagnetische Verträglichkeit -- Teil 1: Allgemeines
Applications ferroviaires - Compatibilité électromagnétique -- Partie 1: Généralités
Ta slovenski standard je istoveten z: EN 50121-1:2006
ICS:
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
45.020 Železniška tehnika na Railway engineering in
splošno general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 50121-1
NORME EUROPÉENNE
July 2006
EUROPÄISCHE NORM
ICS 29.020; 29.280; 45.020 Supersedes EN 50121-1:2000
Incorporates Corrigendum May 2008

English version
Railway applications -
Electromagnetic compatibility
Part 1: General
Applications ferroviaires -  Bahnanwendungen -
Compatibilité électromagnétique Elektromagnetische Verträglichkeit
Partie 1: Généralités Teil 1: Allgemeines

This European Standard was approved by CENELEC on 2006-07-01. 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.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This European Standard exists 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 Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, the Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50121-1:2006 E
Foreword
This European Standard was prepared by Technical Committee TC 9X: Electrical and electronic
applications for railways. The text of the draft was submitted to the formal vote and was approved by
CENELEC as EN 50121-1 on 2006-07-01.
This European Standard supersedes EN 50121-1:2000.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2007-07-01

– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2009-07-01
This European Standard has been prepared under a mandate given to CENELEC by the European
Commission and the European Free Trade Association and covers essential requirements of
EC Directive 2004/108/EC. See Annex ZZ.
The contents of the corrigendum of May 2008 have been included in this copy.
__________
- 3 - EN 50121-1:2006
Contents
Introduction . 4
1 Scope . 6
2 Normative references . 6
3 Definitions . 7
4 Performance criteria . 7
5 Management of EMC . 7

Annex A (informative) The railway system . 8
Annex ZZ (informative) Coverage of Essential Requirements of EC Directives . 13

Introduction
The railway EMC set of product-specific European Standards is intended, in the main, to permit
compliance with the EMC Directive, but also to provide a means of prescribing compatibility between
internal parts of the railway. It consists of five parts described at the end of this introduction.

The set of standards provides both a framework for managing the EMC for railways and also specifies
the limits for the electromagnetic (EM) emission of the railway as a whole to the outside world and for
the EM emission and immunity for equipment operating within the railway. The latter must be
compatible with the emission limits set for the railway as a whole and also provides for establishing
confidence in equipment being Fit For Purpose in the Railway environment. There are different
stationary emission limits set for trams/trolleybuses and for metro/mainline railways. The frequency
covered by the standards is in the range from d.c. to 400 GHz. No measurements need to be
performed at frequencies where no requirement is specified. The limits for EMC phenomena are set so
that the railway as a whole satisfies the Directive on electromagnetic compatibility with the outside
world, and so that EMC is achieved between the various parts of the railway. Any specific problems in
complying with the limits shall be addressed by the procedures given in the EMC Directive. Throughout
the set of standards, the immunity levels are chosen to ensure a reasonable level of EMC with other
apparatus within the local railway environment and with emissions which enter the railway from the
outside world. Limits are also placed on EM emission by railways into the outside world.

The compatibility between railway emissions and their external environment is based upon emission
limits from the railways being set by considering the results from measurements at the time that the
EMC Directive became enforceable. Given that the general compatibility between railways and their
environment was satisfactory at the time these measurements were made and subsequent experience
of applying the limits has confirmed their acceptability, compliance with this Standard has been judged
to give satisfactory compatibility. The immunity and emission levels do not of themselves guarantee
that the railway will have satisfactory compliance with its neighbours. In exceptional circumstances, for
instance near a “special location” (as defined in the EMC Directive) which has unusually high levels of
EM interference, the railway system may require additional measures to be taken to ensure proper
compatibility. Particular care should be taken when in proximity to equipment not covered by the EMC
Directive such as radio transmission equipment, military or medical installations. Attention is
particularly drawn to any magnetic imaging equipment in hospitals that may be near to urban transport.
In all these cases, compatibility must be achieved with consultation and co-operation between the
interested parties.
The immunity and emission levels do not of themselves guarantee that integration of the apparatus
within the railway will necessarily be satisfactory. The standard cannot cover all the possible
configurations of apparatus, but the test levels are sufficient to achieve satisfactory EMC in the majority
of cases. In exceptional circumstances, for instance near a “special location” (as defined in the EMC
Directive) which has unusually high levels of EM interference, the system may require additional
measures to be taken to ensure proper operation. The resolution of this is a matter for discussion
between the equipment supplier and the project manager, infrastructure controller or equivalent.

The railway apparatus is assembled into large systems and installations, such as trains and signalling
control centres. Details are given in annex A. It is not, therefore, possible to establish immunity tests
and limits for these large assemblies. The immunity levels for the apparatus will normally ensure
reliable operation, but it is necessary to prepare an EMC management plan to deal with complex
situations or to deal with specific circumstances. For example, the passage of the railway line close to
a high power radio transmitter which produces abnormally high field strengths. Special conditions may
have to be applied for railway equipment which has to work near such a transmitter and these will be
accepted as National Conditions for the specification.

- 5 - EN 50121-1:2006
The series of Standards EN 50121, Railway applications - Electromagnetic compatibility, contains the
following parts:
Part 1: General
This part gives a description of the electromagnetic behaviour of a railway; it specifies the
performance criteria for the whole set. A management process to achieve EMC at the interface
between the railway infrastructure and trains is referenced.

Part 2: Emission of the whole railway system to the outside world

This part sets the emission limits from the railway to the outside world at radio frequencies. It
defines the applied test methods and gives information on typical field strength values at traction
and radio frequency (cartography).

Part 3-1: Rolling stock - Train and complete vehicle

This part specifies the emission and immunity requirements for all types of rolling stock. It covers
traction stock and trainsets, as well as independent hauled stock.

The scope of this part of the Standard ends at the interface of the stock with its respective energy
inputs and outputs.
Part 3-2: Rolling stock - Apparatus

This part applies to emission and immunity aspects of EMC for electrical and electronic apparatus
intended for use on railway rolling stock. It is also used as a means of dealing with the impracticality
of immunity testing a complete vehicle.

Part 4: Emission and immunity of the signalling and telecommunications apparatus

This part specifies limits for electromagnetic emission and immunity for signalling and
telecommunications apparatus installed within a Railway.

Part 5: Emission and immunity of fixed power supply installations and apparatus

This part applies to emission and immunity aspects of EMC for electrical and electronic apparatus
and components intended for use in railway fixed installations associated with power supply.

EN 50121-1 and EN 50121-2 are product family standards which take precedence over generic
standards.
EN 50121-3-1, EN 50121-3-2, EN 50121-4, and EN 50121-5 are product standards.

1 Scope
1.1 This Part 1 of the European standards series EN 50121 outlines the structure and the content of
the whole set. This part alone is not sufficient to give presumption of conformity to the essential
requirements of the EMC-Directive and must be used in conjunction with other parts of this standard.

Annex A describes the characteristics of the railway system which affect electromagnetic compatibility
(EMC) behaviour.
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.
Safety considerations are not covered by this set of standards.

The biological effects of non-ionising radiation as well as apparatus for medical assistance, such as
pacemakers, are not considered here.

1.2 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 Railway applications - Electromagnetic compatibility
Part 5: Emission and immunity of fixed power supply installations and
apparatus
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.

EN 50238 Railway applications – Compatibility between rolling stock and train

detection systems
EN 61000-6-2 Electromagnetic compatibility (EMC)
Part 6-2: Generic standards - Immunity for industrial environments

(IEC 61000-6-2)
IEC 60050-161 International Electrotechnical Vocabulary (IEV)

Chapter 161: Electromagnetic compatibility (EMC)

- 7 - EN 50121-1:2006
3 Definitions
For the purpose of this European Standard, definitions related to EMC and to relevant phenomena may
be found in IEC 60050-161.
Other parts of this European Standard may contain specific definitions.

4 Performance criteria
NOTE   This clause is based on EN 61000-6-2.

The variety and the diversity of the apparatus within the scope of this set of standards makes it difficult
to define precise criteria for the evaluation of the immunity test results.

If, as a result of the application of the tests defined in this set of standards, the apparatus becomes
dangerous or unsafe, the apparatus shall be deemed to have failed the test.

A functional description and a definition of performance criteria, during or as a consequence of the
EMC testing, shall be provided by the manufacturer and noted in the test report, based on the following
criteria:
Performance criterion A: The apparatus shall continue to operate as intended during and after the
test. No degradation of performance
...