IEC 62236-3-2:2018

Railway applications - Electromagnetic compatibility - Part 3-2: Rolling stock - Apparatus

IEC 62236-3-2:2018 applies to emission and immunity aspects of EMC for electrical and electronic apparatus intended for use on railway rolling stock. IEC 62236‑3‑2 applies for the integration of apparatus on rolling stock. The objective of this document is to define limits and test methods for electromagnetic emissions and immunity test requirements in relation to conducted and radiated disturbances. This new edition includes the following significant technical changes with respect to the previous edition: clarification of certain parts of the standard; extension of emission and immunity requirements.

Applications ferroviaires - Compatibilité électromagnétique - Partie 3-2: Matériel roulant - Appareils

L'IEC 62236-3-2:2018 s’applique aux aspects d’émission et d’immunité de CEM des appareils électriques et électroniques destinés à être utilisés à bord du matériel roulant ferroviaire. L’IEC 62236-3-2 s’applique pour l’intégration des appareils à bord du matériel roulant. L’objectif du présent document est de définir les limites et les méthodes d’essai concernant les émissions électromagnétiques et les exigences relatives aux essais d’immunité en matière de perturbations conduites et rayonnées. Cette nouvelle édition inclut les changements techniques significatifs suivants par rapport à l’édition précédente: clarification de certaines parties de la norme; extension des exigences d'émission et d'immunité.

General Information

• Status: Published
• Publication Date: 14-Feb-2018
• ICS: 33.100 - Electromagnetic compatibility (EMC)
• ICS: 45.060.01 - Railway rolling stock in general
• Technical Committee: TC 9 - Electrical equipment and systems for railways
• Drafting Committee: MT 62236 - TC 9/MT 62236
• Current Stage: PPUB - Publication issued
• Start Date: 15-Feb-2018
• Completion Date: 23-Feb-2018

Relations

• Revises: IEC 62236-3-2:2008 - Railway applications - Electromagnetic compatibility - Part 3-2: Rolling stock - Apparatus
• Effective Date: 05-Sep-2023

Overview

IEC 62236-3-2:2018 - Railway applications - Electromagnetic compatibility - Part 3-2: Rolling stock - Apparatus - sets out EMC emission and immunity requirements for electrical and electronic apparatus intended for use on railway rolling stock. This third edition (2018) is focused on the integration of apparatus on rolling stock, defining limits and test methods for conducted and radiated disturbances across a very wide frequency range (DC to 400 GHz). The standard is intended to ensure that onboard equipment neither interferes with, nor is unacceptably affected by, other railway systems or external radio sources.

Key topics and technical requirements

• Scope and applicability: Applies to apparatus used on rolling stock; test application depends on apparatus type, configuration, ports and operating conditions. Not intended for intentional radio transmitters; immunity exclusion bands per radio equipment standards apply.
• Emission and immunity limits: Defines limits and test methods for conducted and radiated disturbances. Emission requirements were extended into the 1 GHz–6 GHz band; immunity requirements extended to 5.1 GHz–6 GHz in this edition.
• Ports and test assignments: Requirements are port-specific (e.g., traction AC/DC power ports, auxiliary power, battery, signal/communication, process measurement/control ports, enclosure ports). Tables in the standard list applicable tests per port.
• Test methods referenced: Uses established IEC and CISPR techniques (for example IEC 61000-4 series test methods and CISPR measurement methods) and should be read in conjunction with IEC 62236-1 (general provisions).
• Annexes: Informative annexes provide examples of apparatus and ports (Annex A) and detailed guidance on conducted disturbances from power converters (Annex B).
• Exclusions: Transient emissions during start/stop are excluded; intentional radiators are covered by radio regulations rather than these EMC limits.

Practical applications and who uses this standard

IEC 62236-3-2 is used by:

• Rolling stock OEMs and system integrators to specify EMC performance during vehicle design and integration.
• Component and apparatus manufacturers to design products that meet railway EMC requirements for onboard use.
• EMC test laboratories and certification bodies to plan and perform the required conducted and radiated tests and to interpret port-specific tables.
• Railway operators and maintainers when assessing retrofit compatibility and interference risk on existing fleets.

Practical benefits include reduced risk of onboard equipment interference, clearer test requirements for procurement and compliance, and harmonized EMC practices across international projects.

Related standards

• IEC 62236-1 (General)
• IEC 62236-3-1 (Rolling stock - Train and complete vehicle)
• IEC 61000-4 series (EMC test methods)
• CISPR 11 / CISPR 16 (Measurement methods)
• EN 50121-3-2 (basis for this edition)

Keywords: IEC 62236-3-2, railway EMC, rolling stock apparatus, conducted disturbances, radiated emissions, immunity testing, EMC test methods, power converter disturbances.

Standards Content (Sample)

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Edition 3.0 2018-02
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STANDARD
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Railway applications – Electromagnetic compatibility –
Part 3-2: Rolling stock – Apparatus

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IEC 62236-3-2 ®
Edition 3.0 2018-02
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Railway applications – Electromagnetic compatibility –

Part 3-2: Rolling stock – Apparatus

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.100; 45.060.01 ISBN 978-2-8322-5406-6

– 2 – IEC 62236-3-2:2018 RLV © IEC 2018
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 6
3 Terms, definitions and abbreviated terms . 6
3.1 Terms and definitions . 7
3.2 Abbreviated terms . 7
4 Performance criteria . 8
5 Conditions during testing . 8
6 Applicability . 8
7 Emission tests and limits . 9
8 Immunity tests and limits requirements . 14
Annex A (informative) Examples of apparatus and ports . 19
Annex B (informative) Conducted disturbances generated by power converters in the
range of 9 kHz to 30 MHz . 25

Figure 1 – Main categories of ports . 7
Figure A.1 – AC fed locomotive traction unit with AC traction drive and psophometric
filter on the line side . 22
Figure A.2 – AC/AC system with power factor correction filter on the converter side and
with DC or three-phase auxiliary and train power supply . 22
Figure A.3 – Conventional system with AC input and DC traction motors fed by phase
control converter . 23
Figure A.4 – DC fed system with AC traction drive . 23
Figure A.5 – Additional ports of converter and control electronics . 24
Figure B.1 – Test set-up . 26

Table – Emission – Traction a.c. power ports .
Table – Emission – Traction d.c. power ports .
Table – Emission – Auxiliary a.c. or d.c. power ports .
Table – Emission – Battery referenced ports .
Table – Emission – Process measurement and control ports .
Table – Emission – Enclosure port .
Table 1 – Emission – Auxiliary AC or DC power ports (input and output) . 13
Table 2 – Emission – Battery power supply (input and output) . 13
Table 3 – Immunity – Battery referenced ports (except at the output of energy
sources), auxiliary AC power input ports (rated voltage ≤ 400 480 V ) . 15
r.m.s.
Table 4 – Immunity – Signal and communication, process measurement and control
ports . 16
Table 5 – Immunity – Enclosure ports . 17
Table A.1 – Typical examples of apparatus . 20
Table A.2 – Typical port descriptions . 21
Table B.1 – Emission requirements for AC and DC power ports . 26

INTERNATIONAL ELECTROTECHNICAL COMMISSION
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RAILWAY APPLICATIONS –
ELECTROMAGNETIC COMPATIBILITY –

Part 3-2: Rolling stock – Apparatus

FOREWORD
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– 4 – IEC 62236-3-2:2018 RLV © IEC 2018
International Standard IEC 62236-3-2 has been prepared by IEC technical committee 9:
Electrical equipment and systems for railways.
This third edition cancels and replaces the second edition published in 2008. It constitutes a
technical revision and has been developed on the basis of EN 50121-3-2:2015.
This edition includes the following significant technical changes with respect to the previous
edition:
a) clarification of scope (Clause 1);
b) new definition of ports and clarification in Tables 1 to 5;
c) emission requirement extended in the frequency range 1 GHz to 6 GHz following
IEC 61000-6-4;
d) immunity requirement extended in the frequency range 5,1 GHz to 6 GHz;
e) revision of Annex B.
This International Standard is to be read in conjunction with IEC 62236-1.
The text of this International Standard is based on the following documents:
FDIS Report on voting
9/2338/FDIS 9/2368/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 62236 series, published under the general title Railway
applications – Electromagnetic compatibility, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The “colour inside” logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this publication using a colour printer.

RAILWAY APPLICATIONS –
ELECTROMAGNETIC COMPATIBILITY –

Part 3-2: Rolling stock – Apparatus

1 Scope
This part of IEC 62236 applies to emission and immunity aspects of EMC for electrical and
electronic apparatus intended for use on railway rolling stock. IEC 62236-3-2 applies for the
integration of apparatus on rolling stock.
The frequency range considered is from DC to 400 GHz. No measurements need to be
performed at frequencies where no requirement is specified.
The application of tests shall depends on the particular apparatus, its configuration, its ports,
its technology and its operating conditions.
This document 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 radiated emission and immunity limits in this
standard at the communication frequency do not apply requirement in this document is not
intended to be applicable to the intentional transmission from a radio-transmitter as defined
by the ITU.
Immunity limits do not apply in the exclusion bands as defined in the corresponding EMC
related standard for radio equipment.
This document does not apply to transient emissions when starting or stopping the apparatus.
The objective of this document 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. The emission limits given in this
document take precedence over emission requirements for individual apparatus on board the
rolling stock given in other standards.
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.

– 6 – IEC 62236-3-2:2018 RLV © IEC 2018
These specific provisions are to be used in conjunction with the general provisions in
IEC 62236-1.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements 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.
IEC 60571:2012, Railway applications – Electronic equipment used on rolling stock
IEC 61000-4-2:2008, Electromagnetic compatibility (EMC) – Part 4-2: Testing and
measurement techniques – Electrostatic discharge immunity test
IEC 61000-4-3:2006, Electromagnetic compatibility (EMC) – Part 4-3: Testing and
measurement techniques – Radiated, radio-frequency, electromagnetic field immunity test
IEC 61000-4-3:2006/AMD1:2007
IEC 61000-4-3:2006/AMD2:2010
IEC 61000-4-4:2012, Electromagnetic compatibility (EMC) – Part 4-4: Testing and
measurement techniques – Electrical fast transient/burst immunity test
IEC 61000-4-5:2014, Electromagnetic compatibility (EMC) – Part 4-5: Testing and
measurement techniques – Surge immunity test
IEC 61000-4-5:2014/AMD1:2017
IEC 61000-4-6:2013, Electromagnetic compatibility (EMC) – Part 4-6: Testing and
measurement techniques – Immunity to conducted disturbances, induced by radio-frequency
fields
IEC 61000-4-30:2015, Electromagnetic compatibility (EMC) – Part 4-30: Testing and
measurement techniques – Power quality measurement methods
IEC 61000-6-1, Electromagnetic compatibility (EMC) – Part 6-1: Generic standards –
Immunity for residential, commercial and light-industrial environments
IEC 61000-6-4:2006, Electromagnetic compatibility (EMC) – Part 6-4: Generic standards –
Emission standard for industrial environments
IEC 61000-6-4:2006/AMD1:2010
IEC 62236-1:2018, Railway applications – Electromagnetic compatibility – Part 1: General
IEC 62236-3-1:2018, Railway applications – Electromagnetic compatibility – Part 3-1: Rolling
stock – Train and complete vehicle
CISPR 11, Industrial, scientific and medical (ISM) radio-frequency equipment –
Electromagnetic disturbance characteristics – Limits and methods of measurement
CISPR 16 (all parts), Specification for radio disturbance and immunity measuring apparatus
and methods
CISPR 16-2-1:2014, Specification for radio disturbance and immunity measuring apparatus
and methods – Part 2-1: Methods of measurement of disturbances and immunity – Conducted
disturbance measurements
CISPR 22, Information technology equipment – Radio disturbance characteristics – Limits and
methods of measurement
CISPR 32:2015, Electromagnetic compatibility of multimedia equipment – Emission
requirements
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1.1
rolling stock apparatus
finished product with an intrinsic function intended for implementation into the rolling stock
installation
3.1.2
port
particular interface of the specified apparatus an equipment which couples this equipment
with the external electromagnetic environment (161-01-01) and through which the equipment
is influenced by this environment
EXAMPLE Auxiliary AC or DC power port, I/O (input/output) port, earth port.
Note 1 to entry: The main categories of ports for rolling stock apparatus are presented in Figure 1.
Enclosure port
Auxiliary AC or DC power port
Signal and communication port
Battery power supply
ROLLING
STOCK
Process measurement and
APPARATUS
control port
Earth port
IEC
Figure 1 – Main categories of ports
Note 2 to entry: Typical examples of rolling stock apparatus with their ports are listed in Annex A.
Note 3 to entry: Traction power ports are not covered in IEC 62236-3-2:2018, see Annex B.
[SOURCE: IEC 60050-161:1990, AMD4:2014 161-01-27, modified]
3.1.3
enclosure port
physical boundary of the apparatus through which electromagnetic fields may radiate or
impinge
– 8 – IEC 62236-3-2:2018 RLV © IEC 2018
3.2 Abbreviated terms
AC Alternating current
AM Amplitude modulation
CISPR Comité international spécial des perturbations radioélectriques
DC Direct current
EMC Electromagnetic compatibility
I/O Input / Output
ITU International Telegraph Union
PC Personal computer
r.m.s. Root mean square
THD Total harmonic distortion
TV Television
4 Performance criteria
The variety and the diversity of the apparatus within the scope of this document make it
difficult to define precise criteria for the evaluation of the immunity test results.
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 criteria A, B, C defined in IEC 62236-1:2018.
5 Conditions during testing
It is not always possible to test every function of the apparatus. The tests shall be made at a
typical operating mode considered by the manufacturer to produce the largest emission or
maximum susceptibility to noise disturbance as appropriate in the frequency band being
investigated consistent with normal applications. The manufacturer shall define The
conditions during testing shall be defined in a test plan (see basic standard of IEC 61000-4
series).
If the apparatus is part of a system, or can be connected to auxiliary apparatus, then the
apparatus shall be tested while connected to the minimum configuration of auxiliary apparatus
necessary to exercise the ports in accordance e.g. with CISPR 22 CISPR 32:2015, Clause 6.
The configuration and mode of operation shall be specified in the test plan and the actual
conditions, during the tests, shall be precisely noted in the test report.
If the apparatus has a large number of similar ports or ports with many similar connections,
then a sufficient number shall be selected to simulate actual operating conditions and to
ensure that all the different types of termination are covered (e.g. 20 % of the ports or at least
four ports).
The tests shall be carried out within the specified operating range for the apparatus and at its
rated nominal supply voltage, unless otherwise indicated in the basic standard.
6 Applicability
The measurements in this document shall be made on the relevant ports of the apparatus.
It may be determined from consideration of the electrical characteristics, the connection and
the usage of a particular apparatus that some of the tests are not applicable (e.g. radiated

immunity of induction motors, transformers). In such cases, the decision not to test has to be
recorded in the test plan or and test report.
If not otherwise specified, the EMC tests shall be type tests.
7 Emission tests and limits
The emission tests and limits for apparatus covered by this document are given on a port by
port basis.
Measurements shall be performed in well-defined and reproducible conditions for each type of
disturbance.
The radiated emission limits defined for enclosure port in IEC 61000-6-4:2006, Table 1 shall
be complied with. The description of the test, the test methods and the test set-up are given in
Basic Standards which are referred to in Tables 1 to 6 IEC 61000-6-4:2006.
Measurement distance is 10 m according to line 1.1 in IEC 61000-6-4:2006, Table 1. A
measurement distance of 3 m may be used with the limit increased by 10 dB.
Traction converters and auxiliary converters over 50 kVA need not be tested individually, but
when the vehicle is tested as a whole in accordance with IEC 62236-3-1.
The description of the conducted emission tests, the test methods and the test set-up are
given in Basic Standards which are referred to in Tables 1 and 2.
The contents of these Basic Standards are not repeated herein, however, modifications or
additional information needed for the practical application of the tests are given in this
document.
NOTE The reference to “Basic Standard“ is intended to be limited to those parts of the standard that give the
description of the test, the test methods and the test set-up.

– 10 – IEC 62236-3-2:2018 RLV © IEC 2018

Table 1 – Emission – Traction a.c. power ports
Test Basic
Port Test set-up Remarks
specification standard
High voltage
1.1 Signalling and see IEC 62236-3-1
connection, input side telecommunication
before filter frequencies
(port 3 on Figures A.1,
9 kHz - 30 MHz No limits  See Notes 1 and 2
A.2 and A.3)
NOTE 1 No conducted radio frequency limits are applied. The apparatus when installed with other surrounding equipment should satisfy the radiated emission limits of
IEC 62236-3-1 for trains.
NOTE 2 It is desirable but not possible to apply conducted radio frequency limits. No practical test method exists and the relationship between conducted emissions and radiated
emissions is not possible to define.

Table 2 – Emission – Traction d.c. power ports
Test Basic
Port Test set-up Remarks
specification standard
2.1 High voltage Signalling and see IEC 62236-3-1
connection, input side telecommunication
before filter
frequencies
(port 3 on Figure A.4)
9 kHz - 30 MHz No limits  See Notes 1 and 2
NOTE 1 No conducted radio frequency limits are applied. The apparatus when installed with other surrounding equipment should satisfy the radiated emission limits of
IEC 62236-3-1 for trains.
NOTE 2 At present, there is no agreed method or limit for conducted emissions on the traction supply from 9 kHz to 30 MHz. Limiting conducted emissions from an apparatus
connected to the traction supply will prevent excessive radiated emissions from the supply system. A method for measuring conducted emissions is proposed in Annex B.
Experience in this technique and the relationship between conducted and radiated emissions are necessary in order to make this standard progress in the future.

Table 3 – Emission – Auxiliary a.c. or d.c. power ports
Test Basic
Port Test set-up Remarks
specification standard
Auxiliary supply
3.1 9 kHz - 150 kHz No limits CISPR 11 CISPR 11 See Notes 1 and 2
sinusoidal a.c. or d.c.
150 kHz - 500 kHz 99 dBµV quasi-peak See Notes 3, 4 and 5
(port 9 on Figures A.1,
A.2 and A.4)
500 kHz - 30 MHz See Notes 3, 4 and 5
93 dBµV quasi-peak
NOTE 1 At present, there are no limits for conducted emissions from 9 kHz to 150 kHz. Limiting conducted emissions from an apparatus will prevent excessive radiated
emissions. Experience in this technique and the relationship between conducted and radiated emissions are necessary in order to make this standard progress in the future.
NOTE 2 230 V AC power outlet ports for public use should offer a power quality, which is sufficient for the use of intended equipment like PC and mobile telephone chargers.
The total harmonic distortion should be limited by a sine-filter to ≤ 8 %. The burst and surge emissions of the outlet should be limited to the levels of residential equipment
according to IEC 61000-6-1. AM radio receivers are not intended to be supplied by these power outlets.
NOTE 3 Wherever applicable the method defined by CISPR 11 is to be used. At present, the existing method of measuring conducted emissions (CISPR 11) has limitations in
terms of voltage and current rating of coupling networks. In addition, the method of measuring voltage has safety implications for testing high power systems. Limiting conducted
emissions from apparatus connected to external cable systems will prevent excessive radiated emissions.
NOTE 4 This requirement refers to the industrial limit values but considering they have been defined to protect radio and TV sets and as the objective is not the same here, the
applicable limit for railway applications has been relaxed by 20 dB to be more representative of potential problems.
NOTE 5 This requirement is not applicable to power ports which are connected to other dedicated, compatible ports.

Table 4 – Emission – Battery referenced ports
Test Basic
Port Test set-up Remarks
specification standard
4.1 Battery power supply 9 kHz - 150 kHz No limits CISPR 11 CISPR 11 See Note 1
(port 10 on Figures A.1 to
150 kHz - 500 kHz See Note 2
99 dBµV quasi-peak
A.5)
500 kHz - 30 MHz See Note 2
93 dBµV quasi-peak
NOTE 1 At present, there are no limits for conducted emissions from 9 kHz to 150 kHz. Limiting conducted emissions from an apparatus will prevent excessive radiated
emissions. Experience in this technique and the relationship between conducted and radiated emissions is necessary in order to make this standard progress in the future.
NOTE 2 This requirement refers to the industrial limit values but considering they have been defined to protect radio and TV sets and as the objective is not the same here, the
applicable limit for railway applications has been relaxed by 20 dB to be more representative of potential problems.

– 12 – IEC 62236-3-2:2018 RLV © IEC 2018

Table 5 – Emission – Process measurement and control ports
Test Basic
Port Test set-up Remarks
specification standard
Electronic supply
5.1 9 kHz - 150 kHz No limits CISPR 11 CISPR 11 See Note 1
sinusoidal a.c. or d.c.
150 kHz - 500 kHz See Note 2
99 dBµV quasi-peak
(port 16 on Figure A.5)
500 kHz - 30 MHz See Note 2
93 dBµV quasi-peak
NOTE 1 At present, there are no limits for conducted emissions from 9 kHz to 150 kHz. Limiting conducted emissions from an apparatus will prevent excessive radiated
emissions. Experience in this technique and the relationship between conducted and radiated emissions is necessary in order to make this standard progress in the future.
NOTE 2 This requirement refers to the industrial limit values but considering they have been defined to protect radio and TV sets and as the objective is not the same here, the
applicable limit for railway applications has been relaxed by 20 dB to be more representative of potential problems.

Table 6 – Emission – Enclosure port
Test Basic
Port Test set-up Remarks
specification standard
6.1 Enclosure CISPR 11 CISPR 11 See Notes 1 and 2
30 MHz - 230 MHz 40 dBµV/m quasi-peak
230 MHz - 1 GHz See Notes 1 and 2
47 dBµV/m quasi-peak
NOTE 1 The measurement distance is 10 m. A measurement distance of 3 m may be used with the limit increased by 10 dB.
NOTE 2 Traction converters and auxiliary converters over 50 kVA need not be tested individually but when the vehicle is tested as a whole in accordance with IEC 62236-3-1.

Table 1 – Emission – Auxiliary AC or DC power ports (input and output)
Test Basic Applicability
Port Test set-up Remarks
specification Standard note
a, b c
1.1 Auxiliary supply 150 kHz to 500 kHz 99 dBμV quasi-peak CISPR 16-2-1 CISPR 16-2-1 See and For the time being there are no limits for
sinusoidal AC or DC shore supply mode. Therefore the limits
500 kHz to 30 MHz 93 dBμV quasi-peak
(port 9 on Figures A.1, given in this table are valid. Other limits
A.2 and A.4) may apply if connected e.g. to the public
low voltage power supply and should be
specified by the train operator.
1.2 AC power outlet port for 50 Hz to 2 kHz THD < 8 % IEC 61000-4-30  230 V AC power outlet ports for public
public use use shall offer a power quality, which is
(THD: total
sufficient for the use of intended
harmonic distortion)
equipment like PC and mobile telephone
chargers. The harmonic distortion in
differential mode shall be limited by a
sine-filter to < 8 %.
a
Wherever applicable the method defined by CISPR 16-2-1 is to be used. At present the existing method of measuring conducted emissions (CISPR 16-2-1) has limitations in
terms of voltage and current rating of coupling networks. In addition, the method of measuring voltage has safety implications for testing high power systems. Limiting
conducted emissions from apparatus connected to external cable systems will prevent excessive radiated emissions.
b
This requirement refers to the industrial limit values, but considering they have been defined to protect radio and TV sets and as the objective is not the same here, the
applicable limit for railway applications has been relaxed by 20 dB to be more representative of potential problems.
c
This requirement is not applicable to power ports which are connected to other dedicated, compatible ports.

Table 2 – Emission – Battery power supply (input and output)
Test Basic Applicability
Port Test set-up Remarks
specification standard note
a
2.1 Battery power supply 150 kHz to 500 kHz 99 dBμV quasi-peak CISPR 16-2-1 CISPR 16-2-1 See
(port 10 on Figures A.1 500 kHz to 30 MHz 93 dBμV quasi-peak
to A.5)
a
This requirement refers to the industrial limit values, but considering they have been defined to protect radio and TV sets and as the objective is not the same here, the
applicable limit for railway applications has been relaxed by 20 dB to be more representative of potential problems.

– 14 – IEC FDIS 62236-3-2 © IEC 2017
8 Immunity tests and limits requirements
The immunity tests and limits requirements for apparatus covered by this document are given
on a port by port basis.
The levels do not however cover all cases which may occur with an extremely low probability
of occurrence in any location. Specific requirements which deviate from this document shall
be specified.
To ensure the immunity of the complete vehicle, the limits requirements shall be applicable to
all relevant apparatus.
Tests shall be conducted in a well-defined and reproducible manner.
The tests shall be carried out as single tests in sequence. The sequence of testing is optional.
The description of the test, the test generator, the test methods and the test set-up are given
in Basic Standards which are referred to in Tables 3 to 5.
The contents of these Basic Standards are not repeated herein, however, modifications or
additional information needed for the practical application of the tests are given in this
document.
When installing new apparatus in existing rolling stock or replacing apparatus, special care
should be taken to ensure that EMC is maintained, e.g. in the EMC plan.

Table 3 – Immunity – Battery referenced ports (except at the output of energy sources),
auxiliary AC power input ports (rated voltage ≤ 400 480 V )
r.m.s.
Perfor-
Environmental Test Applicability
Basic Standard Test set-up Remarks mance
phenomena specification note
criteria
a
3.1 Radio-frequency 0,15 MHz to 80 MHz IEC 61000-4-6 IEC 61000-4-6 See The test level
common mode specified is the
10 V (r.m.s.) Unmodulated carrier A
r.m.s. value of the
unmodulated carrier
80 % AM, 1 kHz
b
3.2 Fast transients ±2 kV Peak IEC 61000-4-4 IEC 61000-4-4 See Direct coupling
5/50 ns T / T A
r h
5 kHz Repetition frequency
b,c
3.3 Surges 1,2 / 50 µs IEC 61000-4-5 IEC 61000-4-5 See All severity levels
below the given
±2 kV 42 Ω, 0,5 µF Open circuit test voltage,
severity level have
line to ground
to be tested with
each 5 pulses and
±1 kV 42 Ω, 0,5 µF Open circuit test voltage,
a test sequence not
line to line
alternating but first
B
one polarity, then
the other polarity
Test with maximum
permanent supply
voltage as defined
in IEC 60571
a
The test level can also be defined as the equivalent current into a 150 Ω load.
b
The test applies to the power supply ports and the battery control input output ports, with direct coupling, positive and negative polarity.
c
The test applies to the power supply ports and the battery control input output ports.This test is intended to replicate the phenomenon known as direct coupling; hence, an
output impedance of 42 Ω (40 Ω and 2 Ω generator) and a coupling capacitance of 0,5 µF is specified. This value is accepted as a compromise, as the impedance of battery
referenced network inside a rolling stock can vary up to a few hundred ohms depending on its length.

– 16 – IEC 62236-3-2:2018 RLV © IEC 2018

Table 4 – Immunity – Signal and communication, process measurement and control ports
Environmental Test Basic Standard Test set-up Applicability Remarks Performance

phenomena specification note criteria
b,c
Radio-frequency
4.1 0,15 MHz to 80 MHz IEC 61000-4-6 IEC 61000-4-6 See The test level
common mode specified is the
A
10 V (r.m.s.) Unmodulated carrier
r.m.s. value of the
unmodulated carrier
80 % AM, 1 kHz
a, b
4.2 Fast transients ±2 kV Peak IEC 61000-4-4 IEC 61000-4-4 See Capacitive clamp
used
5/50 ns T / T
A
r h
5 kHz Repetition frequency
a
Capacitive coupling, positive and negative polarity. Battery referenced control ports are covered by requirements in Table 3.
b
Applicable only to ports interfacing with cables whose total length according to the manufacturer’s functional specification may exceed 3 m.
c
The test level can also be defined as the equivalent current into a 150 Ω load.

Table 5 – Immunity – Enclosure ports
Environmental Test
Basic standard Test set-up Remarks Performance criteria
phenomena specification
Radio-frequency
9.1 80 MHz - 1 000 MHz See Notes 1 and 2
electromagnetic field.
20 V/m (r.m.s.) Unmodulated carrier The test level specified is
IEC 61000-4-3 IEC 61000-4-3 A
Amplitude modulated
the r.m.s. value of the
80 % AM, 1 kHz
unmodulated carrier
9.2 Radio-frequency 800 MHz - 1 000 MHz
electromagnetic field,
20 V/m (r.m.s.) Unmodulated carrier
from digital mobile
telephones
80 % AM, 1 kHz
See Notes 2, 3 and 4
1 400 MHz - 2 100 MHz
The test level specified is
10 V/m (r.m.s.) Unmodulated carrier IEC 61000-4-3 IEC 61000-4-3 A
the r.m.s. value of the
80 % AM, 1 kHz
unmodulated carrier
2 100 MHz - 2 500 MHz
5 V/m (r.m.s.) Unmodulated carrier
80 % AM, 1 kHz
9.3 Electrostatic discharge Contact discharge
± 6 kV
IEC 61000-4-2 IEC 61000-4-2 See Note 5 B
Air discharge
± 8 kV
NOTE 1 This limit applies to equipment mounted in the passenger compartments, drivers cab or external to the rolling stock (roof, underframe). For equipment mounted in all other
areas, a severity level of 10 V/m may be used.
NOTE 2 For large apparatus (e.g. traction drives, auxiliary converters) it is often not practical to perform the immunity test to radiated electromagnetic fields on the complete unit. In
such cases the manufacturer should test susceptible sub-systems (e.g. control electronics). The test report should justify the selection or not of sub-systems and any assumptions
made (e.g. reduction of field due to case shielding).
NOTE 3 The test in 5.2 of IEC 61000-4-3 should be applied at the digital radio telephone frequencies in use in the countries in which the equipment is intended to be operated.
NOTE 4 The immunity test levels may be reduced for equipment mounted in areas where the threat from mobile digital radio telephones has been demonstrated to be less severe.
NOTE 5 Only applicable to equipment accessible to passengers and operational staff (not maintenance).

– 18 – IEC 62236-3-2:2018 RLV © IEC 2018

Environmental Test Applicability Performance
Basic Standard Test set-up Remarks
phenomena specification note criteria
5.1 Radio-frequency 80 MHz to 800 MHz The test level
electromagnetic field. specified is the
20 V/m (r.m.s.) Unmodulated carrier a b
Amplitude modulated IEC 61000-4-3 IEC 61000-4-3 See and r.m.s. value of A
the unmodulated
80 % AM, 1 kHz
carrier
5.2 Radio-frequency 800 MHz to 1 000 MHz
electromagnetic field
20 V/m (r.m.s.) Unmodulated carrier
80 % AM, 1 kHz
1 400 MHz to The test level
specified is the
2 000 MHz
Unmodulated carrier
r.m.s. value of
10 V/m (r.m.s.)
the unmodulated
carrier
80 % AM, 1 kHz
b
These tests are
IEC 61000-4-3 IEC 61000-4-3 See A
2 000 MHz to
intended to
2 700 MHz
simulate
Unmodulated carrier
disturbances from
5 V/m (r.m.s.)
digital
80 % AM, 1 kHz
communication
devices.
5 100 MHz to
6 000 MHz
Unmodulated carrier
3 V/m (r.m.s.)
80 % AM, 1 kHz
5.3 Electrostatic discharge ± 6 kV Contact discharge
c
IEC 61000-4-2 IEC 61000-4-2 See  B
± 8 kV
Air discharge
a
This limit applies to equipment mounted in the passenger compartments, drivers cab or external to the rolling stock (roof, underframe). For equipment mounted in all other
areas, a severity level of 10 V/m may be used.
b
For large apparatus (e.g. traction drives, auxiliary converters), it is often not practical to perform the immunity test to radiated electromagnetic fields on the complete unit. In
such cases the manufacturer should test susceptible sub-systems (e.g. control electronics). The test report should justify the selection or not of sub-systems and any
assumptions made (e.g. reduction of field due to case shielding).
c
Only applicable to equipment accessible to passengers and operational staff (not maintenance).

Annex A
(informative)
Examples of apparatus and ports
The purpose of this annex is to provide examples of the different types of rolling stock
apparatus together with their ports. Examples of apparatus which may be placed on the
market as a single commercial unit are given in Table A.1. However, these items of apparatus
may also form a sub-system in a larger apparatus (e.g. control electronics in an auxiliary
converter). In this case, the requirements of the standard apply only to the apparatus which is
placed on the market. A port is defined in the standard as the interface of an apparatus with
the external environment. The matrix in the table indicates whether the particular apparatus is
relevant to emission, immunity or neither. This guidance is offered for the benefit of users of
this document, but it is not intended to be definitive. It is for the user of the document to make
the necessary technical judgements in determining whether or not a test is applicable.
The drawings of The following figures clarify the most essential ports. They show examples of
different arrangements.
Figure A.1 applies for an AC fed locomotive traction unit with AC traction drive and
psophometric filter on the line side.
Figure A.2 shows another AC/AC system with power factor correction filter on the converter
side and with DC or three-phase auxiliary and train power supply.
Figure A.3 shows a more conventional system with AC input and DC traction motors fed by
phase control converter.
Figure A.4 is a DC fed system with AC traction drive.
Figure A.5 shows some additional ports of converter and control electronics.
Of course, many other different system arrangements are possible.

– 20 – IEC 62236-3-2:2018 RLV © IEC 2018
Table A.1 – Typical examples of apparatus
Apparatus Test requi
...

IEC 62236-3-2 ®
Edition 3.0 2018-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Railway applications – Electromagnetic compatibility –
Part 3-2: Rolling stock – Apparatus

Applications ferroviaires – Compatibilité électromagnétique –
Partie 3-2: Matériel roulant – Appareils

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IEC 62236-3-2 ®
Edition 3.0 2018-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Railway applications – Electromagnetic compatibility –

Part 3-2: Rolling stock – Apparatus

Applications ferroviaires – Compatibilité électromagnétique –

Partie 3-2: Matériel roulant – Appareils

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.100; 45.060.01 ISBN 978-2-8322-5309-0

– 2 – IEC 62236-3-2:2018 © IEC 2018
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 6
3 Terms, definitions and abbreviated terms . 6
3.1 Terms and definitions . 6
3.2 Abbreviated terms . 7
4 Performance criteria . 8
5 Conditions during testing . 8
6 Applicability . 8
7 Emission tests and limits . 8
8 Immunity requirements . 11
Annex A (informative) Examples of apparatus and ports . 15
Annex B (informative) Conducted disturbances generated by power converters . 21

Figure 1 – Main categories of ports . 7
Figure A.1 – AC fed traction unit with AC traction drive and psophometric filter on the

line side . 18
Figure A.2 – AC/AC system with power factor correction filter on the converter side and
with DC or three-phase auxiliary and train power supply . 18
Figure A.3 – Conventional system with AC input and DC traction motors fed by phase
control converter . 19
Figure A.4 – DC fed system with AC traction drive . 19
Figure A.5 – Additional ports of converter and control electronics . 20
Figure B.1 – Test set-up . 21

Table 1 – Emission – Auxiliary AC or DC power ports (input and output) . 10
Table 2 – Emission – Battery power supply (input and output) . 10
Table 3 – Immunity – Battery referenced ports (except at the output of energy

sources), auxiliary AC power input ports (rated voltage ≤ 480 V ) . 12
r.m.s.
Table 4 – Immunity – Signal and communication, process measurement and control
ports . 13
Table 5 – Immunity – Enclosure ports . 14
Table A.1 – Typical examples of apparatus . 16
Table A.2 – Typical port descriptions . 17
Table B.1 – Emission requirements for AC and DC power ports . 21

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
RAILWAY APPLICATIONS –
ELECTROMAGNETIC COMPATIBILITY –

Part 3-2: Rolling stock – Apparatus

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
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governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
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4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62236-3-2 has been prepared by IEC technical committee 9:
Electrical equipment and systems for railways.
This third edition cancels and replaces the second edition published in 2008. It constitutes a
technical revision and has been developed on the basis of EN 50121-3-2:2015.
This edition includes the following significant technical changes with respect to the previous
edition:
a) clarification of scope (Clause 1);
b) new definition of ports and clarification in Tables 1 to 5;
c) emission requirement extended in the frequency range 1 GHz to 6 GHz following
IEC 61000-6-4;
d) immunity requirement extended in the frequency range 5,1 GHz to 6 GHz;

– 4 – IEC 62236-3-2:2018 © IEC 2018
e) revision of Annex B.
This International Standard is to be read in conjunction with IEC 62236-1.
The text of this International Standard is based on the following documents:
FDIS Report on voting
9/2338/FDIS 9/2368/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 62236 series, published under the general title Railway
applications – Electromagnetic compatibility, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
RAILWAY APPLICATIONS –
ELECTROMAGNETIC COMPATIBILITY –

Part 3-2: Rolling stock – Apparatus

1 Scope
This part of IEC 62236 applies to emission and immunity aspects of EMC for electrical and
electronic apparatus intended for use on railway rolling stock. IEC 62236-3-2 applies for the
integration of apparatus on rolling stock.
The frequency range considered is from DC to 400 GHz. No measurements need to be
performed at frequencies where no requirement is specified.
The application of tests depends on the particular apparatus, its configuration, its ports, its
technology and its operating conditions.
This document 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 radiated emission requirement in this document
is not intended to be applicable to the intentional transmission from a radio-transmitter as
defined by the ITU.
Immunity limits do not apply in the exclusion bands as defined in the corresponding EMC
related standard for radio equipment.
This document does not apply to transient emissions when starting or stopping the apparatus.
The objective of this document 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. The emission limits given in this
document take precedence over emission requirements for individual apparatus on board the
rolling stock given in other standards.
Likewise, the immunity requirements have been selected so as to ensure an adequate level of
immunity for rolling stock apparatus.
Test requirements are specified for each port considered.
These specific provisions are used in conjunction with the general provisions in IEC 62236-1.

– 6 – IEC 62236-3-2:2018 © IEC 2018
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements 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.
IEC 60571:2012, Railway applications – Electronic equipment used on rolling stock
IEC 61000-4-2:2008, Electromagnetic compatibility (EMC) – Part 4-2: Testing and
measurement techniques – Electrostatic discharge immunity test
IEC 61000-4-3:2006, Electromagnetic compatibility (EMC) – Part 4-3: Testing and
measurement techniques – Radiated, radio-frequency, electromagnetic field immunity test
IEC 61000-4-3:2006/AMD1:2007
IEC 61000-4-3:2006/AMD2:2010
IEC 61000-4-4:2012, Electromagnetic compatibility (EMC) – Part 4-4: Testing and
measurement techniques – Electrical fast transient/burst immunity test
IEC 61000-4-5:2014, Electromagnetic compatibility (EMC) – Part 4-5: Testing and
measurement techniques – Surge immunity test
IEC 61000-4-5:2014/AMD1:2017
IEC 61000-4-6:2013, Electromagnetic compatibility (EMC) – Part 4-6: Testing and
measurement techniques – Immunity to conducted disturbances, induced by radio-frequency
fields
IEC 61000-4-30:2015, Electromagnetic compatibility (EMC) – Part 4-30: Testing and
measurement techniques – Power quality measurement methods
IEC 61000-6-4:2006, Electromagnetic compatibility (EMC) – Part 6-4: Generic standards –
Emission standard for industrial environments
IEC 61000-6-4:2006/AMD1:2010
IEC 62236-1:2018, Railway applications – Electromagnetic compatibility – Part 1: General
IEC 62236-3-1:2018, Railway applications – Electromagnetic compatibility – Part 3-1: Rolling
stock – Train and complete vehicle
CISPR 16-2-1:2014, Specification for radio disturbance and immunity measuring apparatus
and methods – Part 2-1: Methods of measurement of disturbances and immunity – Conducted
disturbance measurements
CISPR 32:2015, Electromagnetic compatibility of multimedia equipment – Emission
requirements
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1.1
rolling stock apparatus
finished product with an intrinsic function intended for implementation into the rolling stock
installation
3.1.2
port
particular interface of an equipment which couples this equipment with the external
electromagnetic environment (161-01-01) and through which the equipment is influenced by
this environment
EXAMPLE Auxiliary AC or DC power port, I/O (input/output) port, earth port.
Note 1 to entry: The main categories of ports for rolling stock apparatus are presented in Figure 1.
Enclosure port
Auxiliary AC or DC power port
Signal and communication port
Battery power supply
ROLLING
STOCK
Process measurement and
APPARATUS
control port
Earth port
IEC
Figure 1 – Main categories of ports
Note 2 to entry: Typical examples of rolling stock apparatus with their ports are listed in Annex A.
Note 3 to entry: Traction power ports are not covered in IEC 62236-3-2:2018, see Annex B.
[SOURCE: IEC 60050-161:1990, AMD4:2014 161-01-27, modified]
3.1.3
enclosure port
physical boundary of the apparatus through which electromagnetic fields may radiate or
impinge
3.2 Abbreviated terms
AC Alternating current
AM Amplitude modulation
CISPR Comité international spécial des perturbations radioélectriques
DC Direct current
EMC Electromagnetic compatibility
I/O Input / Output
ITU International Telegraph Union
PC Personal computer
r.m.s. Root mean square
THD Total harmonic distortion
TV Television
– 8 – IEC 62236-3-2:2018 © IEC 2018
4 Performance criteria
The variety and the diversity of the apparatus within the scope of this document make it
difficult to define precise criteria for the evaluation of the immunity test results.
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 criteria A, B, C defined in IEC 62236-1:2018.
5 Conditions during testing
It is not always possible to test every function of the apparatus. The tests shall be made at a
typical operating mode considered by the manufacturer to produce the largest emission or
maximum susceptibility to disturbance as appropriate in the frequency band being
investigated consistent with normal applications. The conditions during testing shall be
defined in a test plan (see basic standard of IEC 61000-4 series).
If the apparatus is part of a system, or can be connected to auxiliary apparatus, then the
apparatus shall be tested while connected to the minimum configuration of auxiliary apparatus
necessary to exercise the ports in accordance e.g. with CISPR 32:2015, Clause 6.
The configuration and mode of operation shall be specified in the test plan and the actual
conditions, during the tests, shall be precisely noted in the test report.
If the apparatus has a large number of similar ports or ports with many similar connections,
then a sufficient number shall be selected to simulate actual operating conditions and to
ensure that all the different types of termination are covered (e.g. 20 % of the ports or at least
four ports).
The tests shall be carried out within the specified operating range for the apparatus and at its
nominal supply voltage, unless otherwise indicated.
6 Applicability
The measurements in this document shall be made on the relevant ports of the apparatus.
It may be determined from consideration of the electrical characteristics, the connection and
the usage of a particular apparatus that some of the tests are not applicable (e.g. radiated
immunity of induction motors, transformers). In such cases, the decision not to test has to be
recorded in the test plan and test report.
If not otherwise specified, the EMC tests shall be type tests.
7 Emission tests and limits
The emission tests and limits for apparatus covered by this document are given on a port by
port basis.
Measurements shall be performed in well-defined and reproducible conditions for each type of
disturbance.
The radiated emission limits defined for enclosure port in IEC 61000-6-4:2006, Table 1 shall
be complied with. The description of the test, the test methods and the test set-up are given in
Basic Standards which are referred to in IEC 61000-6-4:2006.

Measurement distance is 10 m according to line 1.1 in IEC 61000-6-4:2006, Table 1. A
measurement distance of 3 m may be used with the limit increased by 10 dB.
Traction converters and auxiliary converters over 50 kVA need not be tested individually, but
when the vehicle is tested as a whole in accordance with IEC 62236-3-1.
The description of the conducted emission tests, the test methods and the test set-up are
given in Basic Standards which are referred to in Tables 1 and 2.
The contents of these Basic Standards are not repeated herein, however, modifications or
additional information needed for the practical application of the tests are given in this
document.
NOTE The reference to “Basic Standard“ is intended to be limited to those parts of the standard that give the
description of the test, the test methods and the test set-up.

– 10 – IEC 62236-3-2:2018 © IEC 2018

Table 1 – Emission – Auxiliary AC or DC power ports (input and output)
Test Basic Applicability
Port Test set-up Remarks
specification Standard note
a, b c
1.1 Auxiliary supply 150 kHz to 500 kHz 99 dBμV quasi-peak CISPR 16-2-1 CISPR 16-2-1 See and For the time being there are no limits for
sinusoidal AC or DC shore supply mode. Therefore the limits
500 kHz to 30 MHz 93 dBμV quasi-peak
(port 9 on Figures A.1, given in this table are valid. Other limits
A.2 and A.4) may apply if connected e.g. to the public
low voltage power supply and should be
specified by the train operator.
1.2 AC power outlet port for 50 Hz to 2 kHz THD < 8 % IEC 61000-4-30  230 V AC power outlet ports for public
public use use shall offer a power quality, which is
(THD: total
sufficient for the use of intended
harmonic distortion)
equipment like PC and mobile telephone
chargers. The harmonic distortion in
differential mode shall be limited by a
sine-filter to < 8 %.
a
Wherever applicable the method defined by CISPR 16-2-1 is to be used. At present the existing method of measuring conducted emissions (CISPR 16-2-1) has limitations in
terms of voltage and current rating of coupling networks. In addition, the method of measuring voltage has safety implications for testing high power systems. Limiting
conducted emissions from apparatus connected to external cable systems will prevent excessive radiated emissions.
b
This requirement refers to the industrial limit values, but considering they have been defined to protect radio and TV sets and as the objective is not the same here, the
applicable limit for railway applications has been relaxed by 20 dB to be more representative of potential problems.
c
This requirement is not applicable to power ports which are connected to other dedicated, compatible ports.

Table 2 – Emission – Battery power supply (input and output)
Test Basic Applicability
Port Test set-up Remarks
specification standard note
a
2.1 Battery power supply 150 kHz to 500 kHz 99 dBμV quasi-peak CISPR 16-2-1 CISPR 16-2-1 See
(port 10 on Figures A.1 500 kHz to 30 MHz 93 dBμV quasi-peak
to A.5)
a
This requirement refers to the industrial limit values, but considering they have been defined to protect radio and TV sets and as the objective is not the same here, the
applicable limit for railway applications has been relaxed by 20 dB to be more representative of potential problems.

8 Immunity requirements
The immunity requirements for apparatus covered by this document are given on a port by
port basis.
The levels do not however cover all cases which may occur with an extremely low probability
of occurrence in any location. Specific requirements which deviate from this document shall
be specified.
To ensure the immunity of the complete vehicle, the requirements shall be applicable to all
relevant apparatus.
Tests shall be conducted in a well-defined and reproducible manner.
The tests shall be carried out as single tests in sequence. The sequence of testing is optional.
The description of the test, the test generator, the test methods and the test set-up are given
in Basic Standards which are referred to in Tables 3 to 5.
The contents of these Basic Standards are not repeated herein, however, modifications or
additional information needed for the practical application of the tests are given in this
document.
When installing new apparatus in existing rolling stock or replacing apparatus, special care
should be taken to ensure that EMC is maintained, e.g. in the EMC plan.

– 12 – IEC 62236-3-2:2018 © IEC 2018

Table 3 – Immunity – Battery referenced ports (except at the output of energy sources),
auxiliary AC power input ports (rated voltage ≤ 480 V )
r.m.s.
Perfor-
Environmental Test Applicability
Basic Standard Test set-up Remarks mance
phenomena specification note
criteria
a
3.1 Radio-frequency 0,15 MHz to 80 MHz IEC 61000-4-6 IEC 61000-4-6 See The test level
common mode specified is the
10 V (r.m.s.) Unmodulated carrier A
r.m.s. value of the
unmodulated carrier
80 % AM, 1 kHz
b
3.2 Fast transients ±2 kV Peak IEC 61000-4-4 IEC 61000-4-4 See Direct coupling
5/50 ns T / T
A
r h
5 kHz Repetition frequency
b, c
3.3 Surges 1,2 / 50 µs IEC 61000-4-5 IEC 61000-4-5 See All severity levels
below the given
±2 kV 42 Ω, 0,5 µF Open circuit test voltage,
severity level have
line to ground
to be tested with
each 5 pulses and
±1 kV 42 Ω, 0,5 µF Open circuit test voltage,
a test sequence not
line to line
alternating but first
B
one polarity, then
the other polarity
Test with maximum
permanent supply
voltage as defined
in IEC 60571
a
The test level can also be defined as the equivalent current into a 150 Ω load.
b
The test applies to the power supply ports and the battery control input output ports, with direct coupling, positive and negative polarity.
c
The test applies to the power supply ports and the battery control input output ports. This test is intended to replicate the phenomenon known as direct coupling; hence, an
output impedance of 42 Ω (40 Ω and 2 Ω generator) and a coupling capacitance of 0,5 µF is specified. This value is accepted as a compromise, as the impedance of battery
referenced network inside a rolling stock can vary up to a few hundred ohms depending on its length.

Table 4 – Immunity – Signal and communication, process measurement and control ports
Environmental Test Basic Standard Test set-up Applicability Remarks Performance

phenomena specification note criteria
b, c
Radio-frequency
4.1 0,15 MHz to 80 MHz IEC 61000-4-6 IEC 61000-4-6 See The test level
common mode specified is the
A
10 V (r.m.s.) Unmodulated carrier
r.m.s. value of the
unmodulated carrier
80 % AM, 1 kHz
a, b
4.2 Fast transients ±2 kV Peak IEC 61000-4-4 IEC 61000-4-4 See Capacitive clamp
used
5/50 ns T / T
A
r h
5 kHz Repetition frequency
a
Capacitive coupling, positive and negative polarity. Battery referenced control ports are covered by requirements in Table 3.
b
Applicable only to ports interfacing with cables whose total length according to the manufacturer’s functional specification may exceed 3 m.
c
The test level can also be defined as the equivalent current into a 150 Ω load.

– 14 – IEC 62236-3-2:2018 © IEC 2018

Table 5 – Immunity – Enclosure ports
Environmental Test Applicability Performance
Basic Standard Test set-up Remarks
phenomena specification note criteria
Radio-frequency
5.1 80 MHz to 800 MHz The test level
electromagnetic field. specified is the
a b
20 V/m (r.m.s.) Unmodulated carrier
Amplitude modulated IEC 61000-4-3 IEC 61000-4-3 See and r.m.s. value of A
the unmodulated
80 % AM, 1 kHz
carrier
5.2 Radio-frequency 800 MHz to 1 000 MHz
electromagnetic field
20 V/m (r.m.s.) Unmodulated carrier
80 % AM, 1 kHz
1 400 MHz to The test level
2 000 MHz specified is the
r.m.s. value of
10 V/m (r.m.s.) Unmodulated carrier
the unmodulated
carrier
80 % AM, 1 kHz
b
These tests are
IEC 61000-4-3 IEC 61000-4-3 See A
2 000 MHz to
intended to
2 700 MHz
simulate
disturbances from
5 V/m (r.m.s.) Unmodulated carrier
digital
80 % AM, 1 kHz communication
devices.
5 100 MHz to
6 000 MHz
3 V/m (r.m.s.) Unmodulated carrier
80 % AM, 1 kHz
5.3 Electrostatic discharge ± 6 kV Contact discharge
c
IEC 61000-4-2 IEC 61000-4-2 See  B
± 8 kV Air discharge
a
This limit applies to equipment mounted in the passenger compartments, drivers cab or external to the rolling stock (roof, underframe). For equipment mounted in all other
areas, a severity level of 10 V/m may be used.
b
For large apparatus (e.g. traction drives, auxiliary converters), it is often not practical to perform the immunity test to radiated electromagnetic fields on the complete unit. In
such cases the manufacturer should test susceptible sub-systems (e.g. control electronics). The test report should justify the selection or not of sub-systems and any
assumptions made (e.g. reduction of field due to case shielding).
c
Only applicable to equipment accessible to passengers and operational staff (not maintenance).

Annex A
(informative)
Examples of apparatus and ports
The purpose of this annex is to provide examples of the different types of rolling stock
apparatus together with their ports. Examples of apparatus which may be placed on the
market as a single commercial unit are given in Table A.1. However, these items of apparatus
may also form a sub-system in a larger apparatus (e.g. control electronics in an auxiliary
converter). In this case, the requirements of the standard apply only to the apparatus which is
placed on the market. A port is defined in the standard as the interface of an apparatus with
the external environment. The matrix in the table indicates whether the particular apparatus is
relevant to emission, immunity or neither. This guidance is offered for the benefit of users of
this document, but it is not intended to be definitive. It is for the user of the document to make
the necessary technical judgements in determining whether or not a test is applicable.
The following figures clarify the most essential ports. They show examples of different
arrangements.
Figure A.1 applies for an AC fed traction unit with AC traction drive and psophometric filter on
the line side.
Figure A.2 shows another AC/AC system with power factor correction filter on the converter
side and with DC or three-phase auxiliary and train power supply.
Figure A.3 shows a more conventional system with AC input and DC traction motors fed by
phase control converter.
Figure A.4 is a DC fed system with AC traction drive.
Figure A.5 shows some additional ports of converter and control electronics.
Of course, many other different system arrangements are possible.

– 16 – IEC 62236-3-2:2018 © IEC 2018
Table A.1 – Typical examples of apparatus
Apparatus Test requirements
Traction converter Emission and immunity
Main circuit breaker No test requirements
Traction transformers No test requirements
Traction motor No test requirements
Auxiliary motor (e.g. induction motor for fans) No test requirements
DC auxiliary supply (battery) Emission and immunity
Signalling and communication equipment Emission and immunity
Electronic man-machine interface Emission and immunity
Environmental conditioning equipment Emission and immunity
Passenger information equipment Emission and immunity
Door control Emission and immunity
Auxiliary equipment for train operation Emission and immunity
Auxiliary equipment for passenger services Emission and immunity
Train management systems Emission and immunity
Electronic power supply Emission and immunity
Braking control system Emission and immunity

In Tables 1 to 5, tests are specified for application to a specific port (interface of an
apparatus). Table A.2 lists some more typical descriptions used for these ports and the type
of apparatus which may have such a port. Examples of these ports are given in the
accompanying figures, except for ports No. 11, 13 and 14.

Table A.2 – Typical port descriptions
Port No.
Typical port name Typical apparatus
on figures
Traction AC power ports
1 Pantograph line terminal Main circuit breaker
3 High voltage connection (before filter) Filter
4 Connection filter-transformer, HV side Filter
5 Train power line single phase Auxiliary converter
6 Connection transformer-converter Propulsion converter
7 Traction motor cables Traction motors
8 Auxiliary feed windings of transformer DC auxiliary supply
Traction DC power ports
2 DC conductor input Main circuit breaker
3 High voltage connection (before filter) Filter
6 Connection filter-converter Propulsion converter
7 Traction motor cables Traction motors
Auxiliary AC ports
9 Auxiliary AC supply Environmental conditioning equipment
Auxiliary DC ports
9 Auxiliary DC supply
Battery referenced ports
10 Battery power supply Electronic power supply
11 Train control bus (conventional battery voltage) Train management system
19 Relay logic input/output Electronic control system
Signal and communication ports
12 Databus within vehicle Electronic control system
13 Databus within train Train management system
14 Passenger entertainment network Passenger entertainment equipment
15 Firing control line Electronic control system
17, 18 Sensor/transducer signal (digital or analog) Electronic control system
20 Communication interface (maintenance) Electronic control system
Process measurement and control ports
16 Internal electronic supply Electronic control system
18 Sensor/transducer signal (analog) Electronic control system
Enclosure port
21 Equipment enclosure All apparatus
Earth port
22 Earth connection All apparatus

– 18 – IEC 62236-3-2:2018 © IEC 2018
AC
Traction
Transformer
3 Converter
4 6
Motor
Filter 1~
M
3~
3~
8 9 10
3~
1~
3~
Auxiliary
Battery
converter charger
Train supply
IEC
Figure A.1 – AC fed traction unit with AC traction drive and
psophometric filter on the line side
AC
Traction
3 Converter
Motor
1~
M
3~
3~
Auxiliary
8 9
1~
Train
3~
supply
or
Auxiliary
converter
3~
or
Transformer
Battery
charger
IEC
Figure A.2 – AC/AC system with power factor correction filter on the converter
side and with DC or three-phase auxiliary and train power supply

AC
Traction
Converter DC motor
6 7
1~
Switch-gear
Transformer
Auxiliary supply
8 10
1~
Battery charger
Train supply 5
IEC
Figure A.3 – Conventional system with AC input and DC traction motors
fed by phase control converter

DC
Train supply 3
Traction
Converter
Motor
Filter 6
M
3~
3~
3 9
3~
3~
Auxiliary Battery
converter
charger
IEC
Figure A.4 – DC fed system with AC traction drive

– 20 – IEC 62236-3-2:2018 © IEC 2018
Train-track
communication
Antenna coil
Traction converter
Traction
motor
6 Power input 7
M
3~
Current sensor
Gate Rotation
unit
speed
sensor 22
Gate
unit
supply
Light
17 18 16 15 10 22 18
guide
or
Grounding
Control electronic 19
Control
panel
Service port
IEC
Figure A.5 – Additional ports of converter and control electronics

Annex B
(informative)
Conducted disturbances generated by power converters
No limits apply for laboratory tests. Emission requirements for this type of equipment are
tested during the emission test of the complete rolling stock.
Table B.1 reminds the requirements for AC and DC ports.
Table B.1 – Emission requirements for AC and DC power ports
Test
Port Remarks
specification
AC Signalling and See national NOTE 1
(port 3 on telecommunication requirements,
Figures A.1, A.2, A.3) frequencies contractual
requirements
B.1
DC
150 kHz to 30 MHz IEC 62236-3-1:2018, NOTE 2
(port 3 on Figure A.4)
6.3.3
NOTE 1 Homologation tests are performed on the complete train.
NOTE 2 The requirement in IEC 62236-3-1:2018 is expressed at the train level as a radiated emission limit.

Some preliminary tests during the design phase could provide helpful information about the
emission expected.
Figure B.1 shows a possible test set-up.
Measuring
apparatus
Current
probe
Power
Input Load
converter
IEC
Figure B.1 – Test set-up
___________
– 22 – IEC 62236-3-2:2018 © IEC 2018
SOMMAIRE
AVANT-PROPOS . 23
1 Domaine d'application . 25
2 Références normatives . 26
3 Termes, définitions et termes abrégés . 27
3.1 Termes et définitions . 27
3.2 Termes abrégés . 27
4 Critères d'aptitude à la fonction . 28
5 Conditions pendant les essais . 28
6 Applicabilité . 28
7 Essais d’émission et limites . 29
8 Exigences d’immunité . 32
Annexe A (informative) Exemples d’appareils et d'accès . 37
Annexe B (informative) Perturbations conduites générées par les convertisseurs de
puissance . 43

Figure 1 – Principales catégories d’accès . 27
Figure A.1 – Unité motrice alimentée en courant alternatif avec traction en courant
alternatif et filtre psophométrique côté ligne .
...