IEC 62236-5:2018

Railway applications - Electromagnetic compatibility - Part 5: Emission and immunity of fixed power supply installations and apparatus

IEC 62236-5:2018 applies to emission and immunity aspects of EMC for electrical and electronic apparatus and systems intended for use in railway fixed installations for power supply. This includes the power feed to the apparatus, the apparatus itself with its protective control circuits, trackside items such as switching stations, power autotransformers, booster transformers, substation power switchgear and power switchgear to other longitudinal and local supplies. 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 5: Emission et immunité des installations fixes d'alimentation de puissance et des équipements associés

L'IEC 62236-5:2018 s’applique aux aspects d’émission et d’immunité de CEM pour les appareils et les systèmes électriques et électroniques destinés à être utilisés dans les installations fixes associées à l’alimentation. Cela concerne l’alimentation des appareils, les appareils eux-mêmes avec leurs circuits de commande de protection, les composants au bord des voies tels que les stations de sectionnement, les autotransformateurs, les transformateurs suceurs, les appareillages de coupure de sous-station et les appareillages de coupure d’autres alimentations longitudinales et locales. 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: 11.040.50 - Radiographic equipment
• 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 62236-5:2008 - Railway applications - Electromagnetic compatibility - Part 5: Emission and immunity of fixed power supply installations and apparatus
• Effective Date: 05-Sep-2023

Overview

IEC 62236-5:2018 - Railway applications - Electromagnetic compatibility - Part 5 - defines emission and immunity requirements for electrical and electronic apparatus and systems used in fixed railway power supply installations (for example substations, switching stations, autotransformers, booster transformers and power switchgear). The standard focuses on ensuring that traction and non-traction power equipment do not cause or suffer harmful electromagnetic disturbance across a very wide frequency range (DC up to 400 GHz) and is a part of the IEC 62236 EMC family.

Key topics and technical requirements

• Scope of applicability: equipment within substation boundaries, trackside items that control/regulate power, feeder conductors supplying substations and other non-traction railway power supplies.
• Emission requirements: limits for radiated and conducted emissions within substation boundaries and to the outside world. This edition extended emission requirements into the 1 GHz to 6 GHz range.
• Immunity requirements: defined immunity tests and performance criteria for various ports and enclosures (see tables in the standard). Immunity was extended in this edition into 5.1 GHz to 6 GHz.
• Port-based approach: separate immunity criteria for enclosure ports, signal/data ports, process/control ports, DC/AC power ports and earth ports (tables 1 to 6).
• Zoning and applicability: heightened immunity expectations for vital equipment, devices connected to traction conductors, apparatus inside a 3 m zone, ports with connections in the 3 m zone, and ports inside the 10 m zone with cables >30 m.
• Frequency and measurement guidance: frequency span considered DC–400 GHz; specific emission test bands and annexes provide measurement guidance (including switch operation emissions).
• Changes from previous edition: clarifications of scope, expanded emission and immunity frequency ranges, and removal of certain radiated H‑field limits in 9 kHz–150 kHz due to low reproducibility and limited outside-world impact.
• Use with other IEC documents: intended to be read alongside IEC 62236-1 and references IEC 61000 series test methods (e.g., IEC 61000-4-2 to -6).

Applications and who uses it

• Railway system designers and electrical engineers: to specify, design and validate power substations and trackside power equipment for EMC compliance.
• Equipment manufacturers: to develop power switchgear, protection and control apparatus that meet emission and immunity limits.
• EMC test laboratories and certifiers: to perform standardized emission and immunity testing for procurement and safety verification.
• System integrators and asset owners: to ensure interoperability, reliability and minimal electromagnetic disturbance across railway power installations.
• Procurement and regulatory bodies: to include EMC compliance criteria in contracts and safety demonstrations.

Related standards

• IEC 62236-1 (general EMC provisions for railway applications)
• IEC 61000‑4 series (EMC test methods)
• IEC 61000‑6 series (generic emission/immunity standards)

Keywords: IEC 62236-5:2018, railway EMC standard, emission and immunity, fixed power supply installations, railway substations EMC, EMC testing railway, radiated emissions, conducted immunity.

Standards Content (Sample)

IEC 62236-5 ®
Edition 3.0 2018-02
REDLINE VERSION
INTERNATIONAL
STANDARD
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Railway applications – Electromagnetic compatibility –
Part 5: Emission and immunity of fixed power supply installations and apparatus

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IEC 62236-5 ®
Edition 3.0 2018-02
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Railway applications – Electromagnetic compatibility –

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

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.100; 45.060.01 ISBN 978-2-8322-5408-0

– 2 – IEC 62236-5:2018 RLV  IEC 2018
CONTENTS
FOREWORD . 3
INTRODUCTION . 2
1 Scope . 6
2 Normative references . 7
3 Terms, definitions and abbreviated terms . 8
3.1 Terms and definitions . 8
3.2 Abbreviated terms . 9
4 Performance criteria . 8
5 Emission tests and limits . 10
5.1 Emission from the traction substation to the outside world . 10
5.2 Emission test for apparatus operating at less than 1 000 V r.m.s. AC . 10
5.3 Emission values within the boundary of the substation . 10
6 Immunity tests and limits requirements . 10
7 Fixed power supplies on railway property which are not used for railway traction

purposes . 20
Annex A (informative) Emission within the boundary of the substation for normal
operation and during the operation of switches . 21
Bibliography . 22

Figure 1 – Main categories of ports .
Figure A.1 – Emission from switches – Peak . 22
Figure A.2 – Emission within substation boundary – Peak . 23

Table 1 – Immunity – Enclosure port . 12
Table 2 – Immunity – Ports for signal lines and data buses not involved in process
control . 15
Table 3 – Immunity – Ports for process, measurement and control lines, and long bus . 16
Table 4 – Immunity – DC input and DC output power ports . 17
Table 5 – Immunity – AC input and AC output power ports . 18
Table 6 – Immunity – Earth port . 19
Table A.1 – Emission from switches (150 kHz to 30 MHz) . 22
Table A.2 – Emission from switches (30 MHz to 1 000 MHz) . 23
Table A.3 – Emission within substation (150 kHz to 30 MHz) . 23
Table A.4 – Emission within substation (30 MHz to 1 000 MHz) . 24

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
RAILWAY APPLICATIONS –
ELECTROMAGNETIC COMPATIBILITY –

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

FOREWORD
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– 4 – IEC 62236-5:2018 RLV  IEC 2018
International Standard IEC 62236-5 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 50121-5:2015.
This edition includes the following significant technical changes with respect to the previous
edition:
a) clarification of scope (Clause 1);
b) emission requirement extended in the frequency range 1 GHz to 6 GHz following
IEC 61000-6-4;
c) immunity requirement extended in the frequency range 5,1 GHz to 6 GHz;
d) removal of limits for radiated H-fields in the frequency range 9 kHz to 150 kHz due to the
fact that:
– there are very few outside world victims;
– there is low reproducibility.
This 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
9/2340/FDIS 9/2370/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.

INTRODUCTION
The requirements of this part of IEC 62236 have been specified so as to ensure a level of
electromagnetic emission which will cause minimal disturbance to other equipment. The
levels, however, do not cover the following cases:
a) where the probability of an occurrence likely to produce emissions in excess of those
which would normally be experienced is extremely low,
a) which may occur with an extremely low probability of occurrence in any location;
b) where highly susceptible apparatus will be is used in close proximity of the equipment
covered by this document, in which case further measures may have to be taken.
The emission limits given are on the basis that the equipment of the product family range is
installed in railway traction substation areas.

– 6 – IEC 62236-5:2018 RLV  IEC 2018
RAILWAY APPLICATIONS –
ELECTROMAGNETIC COMPATIBILITY –

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

1 Scope
This part of IEC 62236 applies to emission and immunity aspects of EMC for fixed power
supply installations and electrical and electronic apparatus and systems intended to be used
in these installations for use in railway fixed installations for power supply. This includes the
power feed to the apparatus, the apparatus itself with its protective control circuits, trackside
items such as switching stations, power autotransformers, booster transformers, substation
power switchgear and power switchgear to other longitudinal and local supplies.
Filters operating at railway system voltage (for example, for harmonic suppression or power
factor correction) are not included in this document since each site has special requirements.
Filters would normally have separate enclosures with separate rules for access. If
electromagnetic limits are required, these will appear in the specification for the equipment.
The limits in this standard do not apply to intentional communication signals.
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 requirements in this
document are not intended to be applicable to the intentional transmission from a radio-
transmitter as defined by the ITU.
The frequency range considered is from DC to 400 GHz. No measurements need to be
performed at frequencies where no requirement is specified.
Emission and immunity limits are given for items of apparatus which are situated:
a) within the boundary of a substation which delivers electric power to a railway;
b) beside the track for the purpose of controlling or regulating the railway power supply,
including power factor correction and filtering;
c) along the track for the purpose of supplying electrical power to the railway other than by
means of the conductors used for contact current collection, and associated return
conductors. Included are high voltage feeder systems within the boundary of the railway
which supply substations at which the voltage is reduced to the railway system voltage;
NOTE 1 Examples are one conductor of a 25-0-25 kV 50 Hz system and the 110 kV 16,7 Hz supply systems.
NOTE 2 Similar conductors which are outside the railway boundary are treated as in the public area and are
considered to be general overhead power lines although they feed only the railway.
d) beside the track for controlling or regulating electric power supplies to ancillary railway
uses. This category includes power supplies to marshalling yards, maintenance depots
and stations;
e) various other non-traction power supplies from railway sources which are shared with
railway traction.
The immunity levels given in this document apply for:
– vital equipment such as protection devices;
– equipment having connections to the traction power conductors;
– apparatus inside the 3 m zone;

– ports of apparatus inside the 10 m zone with connection inside the 3 m zone;
– ports of apparatus inside the 10 m zone with cable length > 30 m.
Apparatus and systems which are in an environment which can be described as residential,
commercial or light industry, even when placed within the physical boundary of the railway
substation, shall comply with the relevant generic International EMC standard comply with
IEC 61000-6-1 for immunity and IEC 61000-6-3 for emission requirements.
Excluded from the immunity requirements of this document is power supply apparatus which
is intrinsically immune to the tests defined in Table 1 to Table 6 of this document.
NOTE An example is an 18 MVA 230 kV to 25 kV power supply transformer.
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 61000-3-2, Electromagnetic compatibility (EMC) – Part 3-2: Limits – Limits for harmonic
current emissions (equipment input current up to and including 16 A per phase)
IEC 61000-3-3, Electromagnetic compatibility (EMC) – Part 3-3: Limits – Limitation of voltage
changes, voltage fluctuations and flicker in public low-voltage supply systems, for equipment
with rated current ≤ 16 A per phase and not subject to conditional connection
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 61000-4-4:2012, 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 61000-4-6:2013, Electromagnetic compatibility (EMC) – Part 4-6: Testing and
measurement techniques – Immunity to conducted disturbances, induced by radio-frequency
fields
IEC 61000-4-8:2009, Electromagnetic compatibility (EMC) – Part 4-8: Testing and
measurement techniques – Power frequency magnetic field immunity test
IEC 61000-4-12, Electromagnetic compatibility (EMC) – Part 4-12: Testing and measurement
techniques – Ring wave immunity test
IEC 61000-4-18:2006, Electromagnetic compatibility (EMC) – Part 4-18: Testing and
measurement techniques – Damped oscillatory wave immunity test

– 8 – IEC 62236-5:2018 RLV  IEC 2018
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 62236-2:2018, Railway applications – Electromagnetic compatibility – Part 2: Emission of
the whole railway system to the outside world
CISPR 16-1-1, Specification for radio disturbance and immunity measuring apparatus and
methods – Part 1-1: Radio disturbance and immunity measuring apparatus – Measuring
apparatus
CISPR 22, Information technology equipment – Radio disturbance characteristics – Limits and
methods of measurement
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
apparatus
electric or electronic product with an intrinsic function intended for implementation into a fixed
railway installation
device or assembly of devices which can be used as an independent unit for specific functions
[SOURCE: IEC 60050-151:2001, 151-11-22]
3.1.2
environment
surrounding objects or region which may influence the behaviour of the system and or may be
influenced by the system
surroundings in which a product or system exists, including air, water, land, natural resources,
flora, fauna, humans and their interrelation
[SOURCE: IEC Guide 109:2012, 3.3]
[SOURCE: IEC 60050-901:2013, 901-07-01]
3.3
port
particular interface of the apparatus with the external environment, for example a.c. power
port, d.c. power port, I/O (input/output) port, earth port (see Figure 1)
3.4
enclosure port
physical boundary of the apparatus through which electromagnetic fields may radiate or
impinge
3.5
railway substation
installation, the main function of which is to supply a contact line system at which the voltage
of a primary supply system, and in some cases the frequency, is transformed to the voltage
and frequency of the contact line
3.6
railway supply lines
conductors running within the boundary of the railway which supply power to only the railway
but are not energised at railway system voltage
Enclosure port
Signal and communication port
AC power port
Process, measurement and
APPARATUS control port
DC power port Earth port
IEC  2188/08
Figure 1 – Main categories of ports
3.1.3
traction substation,
substation,
substation the main function of which is to supply an electric traction system
Note 1 to entry: The synonym substation is used only when the context is clear.
[SOURCE: IEC 60050-811:2017, 811-36-02]
3.1.4
long bus
bus cables with a length of more than 30 m
3.1.5
3 m zone
area along the railway line within a distance of 3 m from the centreline of the nearest track at
both sides of the track
3.1.6
10 m zone
area along the railway line within a distance of 10 m from the centreline of the nearest track at
both sides of the track
3.1.7
railway system voltage
railway system dedicated voltage converted from high voltage
EXAMPLE 25-0-25 kV, 50 Hz; 110 kV, 16,7 Hz.
3.2 Abbreviated terms
AC Alternating current
AM Amplitude modulation
DC Direct current
– 10 – IEC 62236-5:2018 RLV  IEC 2018
EMC Electromagnetic compatibility
ITU International Telecommunication Union
r.m.s. Root mean square
4 Performance criteria
The variety and 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. Three general levels of
performance are therefore used, as defined in IEC 62236-1.
5 Emission tests and limits
5.1 Emission from the traction substation to the outside world
Limit values for this emission, over the frequency range 9 150 kHz to 1 GHz are given in
IEC 62236-2.
NOTE Guidance values are given in IEC 62236-2 for emission of DC and power frequency
magnetic fields.
Conductors (overhead or underground) between the substation and the railway are part of the
railway installation, but because of their wide variety of positions and ampere loadings, limit
values cannot be set for the magnetic fields which they produce.
For apparatus which is under ground, measurements shall be made in the frequency range
9 kHz to 150 kHz at the surface of the ground above the apparatus.
NOTE No limits are set for emissions into the active space of the underground railway due to
the complexities of obtaining measurements in the confined space and the lack of a precise
method of relating the measured values to the degree of disturbance which other apparatus
would suffer.
No measurements are necessary for total underground railway systems with no surface
operation.
5.2 Emission test for apparatus operating at less than 1 000 V r.m.s. AC
The emission limits for apparatus covered by this document which is supplied with electrical
power at a voltage below 1 000 V r.m.s. are given on a port by port basis in IEC 61000-6-4,
Table 1.
5.3 Emission values within the boundary of the substation
Because there is such a wide variety of options for the design and the construction of the
substation, limits are not given for emission within the general space inside the boundary of
the substation. Practical measurements have been made and guidance values are given in
Annex A. These are for information only and are not part of the normative content of this
document.
6 Immunity tests and limits requirements
The immunity test requirements for apparatus covered by this document are given on a port
by port basis in Table 1 to Table 6.
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 tests, the test generator, the test methods, and the test set-up are
given in the Basic Standards which are referred to in Table 1 to Table 6. The contents of the
Basic Standards are not repeated herein, however, modifications or additional information
needed for the practical application of the tests are given in this document.
Where possible, the tests shall be made with a typical operating mode chosen to produce the
maximum susceptibility to noise disturbance in the frequency band being investigated,
consistent with normal applications. The manufacturer shall define the conditions of the test in
the test plan.
NOTE If the apparatus is part of a system or can be connected to auxiliary apparatus, then
the apparatus should preferably be tested while connected to the minimum configuration of
auxiliary apparatus necessary to exercise the test point in accordance with the general
methods of CISPR 22 and IEC 61000-4 series.
The configuration and mode of operation during the tests shall be precisely noted in the test
report. It is not always possible to test every function of the apparatus; in such cases the most
critical mode of operation should be selected.
The tests shall be carried out within the specified operating range for the apparatus and at its
rated supply voltage.
Some of the immunity levels are higher than those of the heavy industrial Generic Standard,
because this has been found necessary in practice.
Voltages induced by traction currents are not addressed treated here. They shall have to be
covered by the functional specification (e.g. IEC 62497-1).

– 12 – IEC 62236-5:2018 RLV  IEC 2018

Table 1 – Immunity – Enclosure port
Environmental Test Basic
Test set-up Remarks Performance criteria
phenomena specification standard
Radio-frequency
1.1 80 MHz - 1 000 MHz IEC 61000-4-3 IEC 61000-4-3 The test level specified is
electromagnetic field, the r.m.s. value of the
10 V/m (r.m.s.) Unmodulated carrier A
amplitude modulated unmodulated carrier
80 % AM, 1 kHz
1.2 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
1 400 MHz -
See Note 3
2 100 MHz
Unmodulated carrier
The test level specified is
10 V/m (r.m.s.) 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
Unmodulated carrier
5 V/m (r.m.s.)
80 % AM, 1 kHz
1.3 Power - frequency 16,7 Hz; 50/60 Hz a.c. systems IEC 61000-4-8 IEC 61000-4-8 See Note 1
magnetic field
100 A/m (r.m.s.) All frequencies have to be
tested
A
0 Hz d.c. systems See Note 1
300 A/m
1.4 Electrostatic discharge Contact discharge IEC 61000-4-2 IEC 61000-4-2 See Note 2
± 6 kV
B
Air discharge
± 8 kV
NOTE 1 Test only applies to apparatus containing devices sensitive to magnetic fields, for example Hall elements, electro-dynamic microphones, etc. Unshielded CRT displays
can exhibit interference effects above 1A/m (r.m.s.).
NOTE 2 See basic standard for applicability of contact and/or air discharge test.
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.

Environmental Test Applicability Performance
Basic standard Test set-up Remarks
phenomena specification note criteria
1.1 Radio-frequency 80 MHz to IEC 61000-4-3 IEC 61000-4-3  The test level specified
electromagnetic field. 800 MHz is the r.m.s. value of
Amplitude modulated the unmodulated
10 V/m (r.m.s.) Unmodulated carrier A
carrier
80 % AM,
1 kHz
1.2 Radio-frequency 800 MHz to
electromagnetic field 1 000 MHz
20 V/m (r.m.s.) Unmodulated carrier
80 % AM,
1 kHz
1 400 MHz to
2 000 MHz
The test level specified
10 V/m (r.m.s.) Unmodulated carrier
is the r.m.s. value of
the unmodulated
80 % AM,
carrier
1 kHz
IEC 61000-4-3 IEC 61000-4-3  A
These tests are
2 000 MHz to
intended to simulate
2 700 MHz
disturbances from
digital communication
5 V/m (r.m.s.) Unmodulated carrier
devices
80 % AM,
1 kHz
5 100 MHz to
6 000 MHz
3 V/m (r.m.s.) Unmodulated carrier
80 % AM,
1 kHz
– 14 – IEC 62236-5:2018 RLV  IEC 2018

Environmental Test Applicability Performance
Basic standard Test set-up Remarks
phenomena specification note criteria
a
1.3 Power – frequency 16,7 Hz  IEC 61000-4-8 IEC 61000-4-8 See Tests only for
magnetic field applicable frequencies
100 A/m
Testing time is ≥ 10 s
50 Hz / 60 Hz
A
100 A/m
0 Hz
300 A/m
b
1.4 Electrostatic ± 6 kV Contact discharge IEC 61000-4-2 IEC 61000-4-2 See
B
discharge
± 8 kV Air discharge
a
Test only applies to apparatus containing devices sensitive to magnetic fields, e.g. Hall elements, electro-dynamic microphones, etc. Unshielded CRT displays can exhibit
interference effects above 1 A/m (r.m.s.).
b
See basic standard for applicability of contact and/or air discharge test.

Table 2 – Immunity – Ports for signal lines and data buses not involved in process control
Environmental Test Performance
Basic standard Test set-up Applicability note Remarks

phenomena specification criteria
a
2.1 Radio-frequency 0,15 MHz to IEC 61000-4-6 IEC 61000-4-6 See The test level
common mode 80 MHz specified is the
r.m.s. value of the
10 V (r.m.s.) Unmodulated
unmodulated
A
carrier
carrier
80 % AM,
1 kHz
b
2.2 Fast transients ± 2 kV Peak IEC 61000-4-4 IEC 61000-4-4 See Capacitive clamp
used
5/50 ns T / T
r h
B A
5 kHz Repetition
frequency
a
The test level can also be defined as the equivalent current into a 150 Ω load.
b
Applicable only to ports interfacing with cables whose total length according to the manufacturer’s functional specification may exceed 1 m.

– 16 – IEC 62236-5:2018 RLV  IEC 2018

Table 3 – Immunity – Ports for process, measurement and control lines, and long bus
Environmental Test Performance
Basic standard Test set-up Applicability note Remarks

phenomena specification criteria
a
3.1 Radio-frequency 0,15 MHz to IEC 61000-4-6 IEC 61000-4-6 See The test level
common mode 80 MHz specified is the
r.m.s. value of the
10 V (r.m.s.) Unmodulated
unmodulated
A
carrier
carrier
80 % AM,
1 kHz
3.2 Damped oscillatory 2,5 kV Line to earth IEC 61000-4-18 IEC 61000-4-18  Both 100 kHz and
voltage 1 MHz
B
1 kV Line to line
(oscillatory waves)
3.3 Fast transients ± 2 kV Peak IEC 61000-4-4 IEC 61000-4-4  Capacitive clamp
used
5/50 ns T / T
r h
B A
Repetition
5 kHz
frequency
3.4 Surges 1,2 / 50 µs IEC 61000-4-5 IEC 61000-4-5  All severity levels
below the given
Open circuit test
± 2 kV
severity level have
voltage, line to
to be tested with 5
earth
pulses for each
severity level and
Open circuit test B
± 1 kV
a test sequence
voltage, line to line
not alternating but
starting with one
polarity followed
by the other
polarity.
a
The test level can also be defined as the equivalent current into a 150 Ω load.

Table 4 – Immunity – DC input and DC output power ports
Environmental Test Performance
Basic standard Test set-up Applicability note Remarks
phenomena specification criteria
a
Radio-frequency
4.1 0,15 MHz to IEC 61000-4-6 IEC 61000-4-6 See The test level
common mode 80 MHz specified is the
r.m.s. value of the
10 V (r.m.s.) Unmodulated
unmodulated
A
carrier
carrier
80 % AM,
1 kHz
b
4.2 Fast transients ± 4 kV Peak IEC 61000-4-4 IEC 61000-4-4 See
5/50 ns T / T
r h
B A
5 kHz Repetition
frequency
b
Surges
4.3 1,2 / 50 µs IEC 61000-4-5 IEC 61000-4-5 See All severity levels
below the given
± 2 kV Open circuit test
severity level have
voltage, line to
to be tested with 5
earth
pulses for each
severity level and
± 1 kV Open circuit test B
a test sequence
voltage, line to line
not alternating but
starting with one
polarity followed
by the other
polarity.
a
The test level can also be defined as the equivalent current into a 150 Ω load.
b
Not applicable to input ports intended for connection to a battery or a rechargeable battery which must shall be removed or disconnected from the apparatus for recharging.

– 18 – IEC 62236-5:2018 RLV  IEC 2018

Table 5 – Immunity – AC input and AC output power ports
Environmental Test Performance
Basic standard Test set-up Applicability note Remarks
phenomena specification criteria

a
5.1 Radio-frequency 0,15 MHz to IEC 61000-4-6 IEC 61000-4-6 See The test level
common mode 80 MHz specified is the
r.m.s. value of the
10 V (r.m.s.) Unmodulated
unmodulated
A
carrier
carrier
80 % AM,
1 kHz
5.2 Fast transients ± 4 kV Peak IEC 61000-4-4 IEC 61000-4-4
5/50 ns T / T
r h
B A
5 kHz Repetition
frequency
5.3 Surges 1,2 / 50 µs IEC 61000-4-5 IEC 61000-4-5  All severity levels
below the given
± 4 kV Open circuit test
severity level have
voltage, line to
to be tested with 5
earth
pulses for each
severity level and
± 2 kV Open circuit test B
a test sequence
voltage, line to line
not alternating but
starting with one
polarity followed
by the other
polarity.
a
The test level can also be defined as the equivalent current into a 150 Ω load.

Table 6 – Immunity – Earth port
Environmental Test Performance
Basic standard Test set-up Applicability note Remarks
phenomena specification criteria
a, b
6.1 Radio-frequency 0,15 MHz to IEC 61000-4-6 IEC 61000-4-6 See The test level
common mode 80 MHz specified is the
r.m.s. value of the
10 V (r.m.s.) Unmodulated
unmodulated
A
carrier
carrier
80 % AM,
1 kHz
b
6.2 Fast transients ± 1 kV Peak IEC 61000-4-4 IEC 61000-4-4 See
5/50 ns T / T A
r h
5 kHz Rep. frequency
a
The test level can also be defined as the equivalent current into a 150 Ω load.
b
Test may not be practicable with cable length less than 3 m.

– 20 – IEC 62236-5:2018 RLV  IEC 2018
7 Fixed power supplies on railway property which are not used for railway
traction purposes
These are used for example for signalling systems, station services, office building services,
freight cranes and yard lighting.
They fall into two categories:
a) those that are supplied from non-railway sources. Examples are supplies from the local
public electricity supplier or from separate generators. These are outside the scope of this
document. For products in the scope of IEC 61000-3-2, IEC 61000-3-3, IEC 61000-3-11 or
IEC 61000-3-12, the requirements of those standards also apply;
b) those that are supplied from railway sources which are shared with train traction. The
supply voltage may have a substantial harmonic content. It is the responsibility of the body
which puts the apparatus into service to establish the levels of immunity and emission
which will ensure EMC. The levels of immunity and emission should be defined in
agreement between the suppliers and client. Examples are supplies from tertiary windings
on rectifier transformers or from the railway AC overhead via transformers.

Annex A
(informative)
Emission within the boundary of the substation
for normal operation and during the operation of switches
As part of the programme of work to measure the emission from the boundary of the
substation, measurements were made of emissions at radio frequencies inside the substation
boundary. The antennas were placed in safe positions and fields were measured during
normal operation and during the operation of switches. Peak values of field strength were
found. Similar values were found in both AC and DC systems. Antennas were 3 m from
switches during tests.
A sufficient number of results were obtained to allow Figure A.1 and Figure A.2 to be drawn.
These show the upper boundary of all results, for the frequency range 9 150 kHz to
1 000 MHz. Values are peak fields, measured with CISPR 16-1-1 test apparatus and with the
recommended bandwidths.
Values are included in this annex for information only and must are not be interpreted as
being the basis for limits. They are an indication of the performance of apparatus of different
ages and designs, now in use in railway traction substations.
Substations have a wide range of configurations, ratings and system voltages. It has not been
found possible to set emission limits for apparatus which will be installed within the boundary
of the substation. Each specific substation will need to be the subject of detailed study to
ensure EMC between the various apparatus used inside the boundary.

– 22 – IEC 62236-5:2018 RLV  IEC 2018
100 100
80 80
60 60
40 40
20 20
0 0
150 1 MHz 10 30 100 MHz 1 GHz
kHz MHz MHz
H field E field
IEC
Figure A.1 – Emission from switches – Peak
NOTE 1 Operation of switches will generate transient radio fields and when the switch interrupts nominal rated
current under conditions of rated voltage, the emission when measured with CISPR 16-1-1 equipment at 3 m from
the apparatus is not expected to exceed the values shown in Table A.1 and Table A.2.

Table A.1 – Emission from switches (150 kHz to 30 MHz)
Frequency Field, peak
MHz dB(µA/m)
0,009 90
0,15- 45
0,15 70
30 40
Measured by a loop antenna with the base between 1 m and 1,5 m above ground
level.
dBµA/m
dBµV/m
Table A.2 – Emission from switches (30 MHz to 1 000 MHz)
Frequency Field, peak, vertical polarization
MHz dB(µA/m)
30 85
1 000 65
Measured with dipole antennas with the centre of the antenna 3 m above ground
level, the values being the end points of straight lines on dB / log(f) plots graph.

NOTE The measuring distance refers to the distance from the nearest point of the individual
item of apparatus, or its enclosure.
80 80
60 60
40 40
0 0
–20
–20
150 1 MHz 10 30
100 MHz
GHz
kHz MHz MHz
H field E field
IEC
Figure A.2 – Emission within substation boundary – Peak

NOTE 2 Due to the wide variety of construction, no limits are set for the emission within the substation boundary
(but outside the building). Measurements have been made in typical substations with CISPR 16-1-1 equipment and
the following values in Table A.3 and Table A.4 are representative:

dBµA/m
dBµV/m
– 24 – IEC 62236-5:2018 RLV  IEC 2018
Table A.3 – Emission within substation (150 kHz to 30 MHz)
Frequency Field, peak
MHz dB(µA/m)
0,009 70
0,15- 25
0,15 50
30 20
Measured by a loop antenna with the base between 1 m and 1,5 m above ground
level.
Table A.4 – Emission within substation (30 MHz to 1 000 MHz)
Frequency Field, peak, vertical polarization
MHz dB(µA/m)
30 65
1 000 45
Measured with dipole antennas with the centre of the antenna 3 m above ground
level, the values being the end points of straight lines on dB / log(f) graph.

WARNING: There is a danger of electric shock from uninsulated conductors in most
substations and any attempt to measure emissions from these conductors must is to be done
with the most careful attention to ensuring safe methods of working.

Bibliography
Other standards which are relevant to the EMC behaviour of apparatus used in railway
substations are listed below. Where limits are in conflict, those contained within this standard
take precedence.
IEC 60255 (all parts), Electrical relays
IEC 61000-3-2:2014, Electromagnetic compatibility (EMC) – Part 3-2: Limits – Limits for
harmonic current emissions (equipment input current up to and including 16 A per phase)
IEC 61000-3-3:2013, Electromagnetic compatibility (EMC) – Part 3-3: Limits – Limitation of
voltage changes, voltage fluctuations and flicker in public low-voltage supply systems, for
equipment with rated current ≤ 16 A per phase and not subject to conditional connection
IEC 61000-3-11:2017, Electromagnetic compatibility (EMC) – Part 3-11: Limits – Limitation of
voltage changes, voltage fluctuations and flicker in public low-voltage supply systems –
Equipment with rated current ≤75 A and subject to conditional connection
IEC 61000-3-12:2011, Electromagnetic compatibility (EMC) – Part 3-12: Limits – Limits for
harmonic currents produced by equipment connected to public low-voltage systems with input
current > 16 A and ≤75 A per phase
IEC 61000-6-1:2016, Electromagnetic compatibility (EMC) – Part 6-1: Generic standards –
Immunity standard for residential, commercial and light-industrial environments
IEC 61000-6-2:2016, Electromagnetic compatibility (EMC) – Part 6-2: Generic standards –
Immunity standard for industrial environments
IEC 61000-6-3:2006, Electromagnetic compatibility (EMC) – Part 6-3: Generic standards –
Emission standard for residential, commercial and light-industrial environments
IEC 61000-6-3:2006/AMD1:2010
IEC 62271-1:2007, High-voltage switchgear and controlgear – Part 1: Common specifications
IEC 62497-1:2010, Railway applications – Insulation coordination – Part 1: Basic
requirements – Cl
...

IEC 62236-5 ®
Edition 3.0 2018-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Railway applications – Electromagnetic compatibility –
Part 5: Emission and immunity of fixed power supply installations and apparatus

Applications ferroviaires – Compatibilité électromagnétique –
Partie 5: Emission et immunité des installations fixes d'alimentation de
puissance et des équipements associés

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IEC 62236-5 ®
Edition 3.0 2018-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Railway applications – Electromagnetic compatibility –

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

Applications ferroviaires – Compatibilité électromagnétique –

Partie 5: Emission et immunité des installations fixes d'alimentation de

puissance et des équipements associés

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.100; 45.060.01 ISBN 978-2-8322-5311-3

– 2 – IEC 62236-5:2018  IEC 2018
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 7
3 Terms, definitions and abbreviated terms . 7
3.1 Terms and definitions . 7
3.2 Abbreviated terms . 8
4 Performance criteria . 9
5 Emission tests and limits . 9
5.1 Emission from the traction substation to the outside world . 9
5.2 Emission test for apparatus operating at less than 1 000 V r.m.s. AC . 9
5.3 Emission values within the boundary of the substation . 9
6 Immunity requirements . 9
7 Fixed power supplies on railway property which are not used for railway traction

purposes . 17
Annex A (informative) Emission within the boundary of the substation for normal
operation and during the operation of switches . 18
Bibliography . 21

Figure A.1 – Emission from switches – Peak . 18
Figure A.2 – Emission within substation boundary – Peak . 19

Table 1 – Immunity – Enclosure port . 11
Table 2 – Immunity – Ports for signal lines and data buses not involved in process
control . 12
Table 3 – Immunity – Ports for process, measurement and control lines, and long bus . 13
Table 4 – Immunity – DC input and DC output power ports . 14
Table 5 – Immunity – AC input and AC output power ports . 15
Table 6 – Immunity – Earth port . 16
Table A.1 – Emission from switches (150 kHz to 30 MHz) . 19
Table A.2 – Emission from switches (30 MHz to 1 000 MHz) . 19
Table A.3 – Emission within substation (150 kHz to 30 MHz) . 20
Table A.4 – Emission within substation (30 MHz to 1 000 MHz) . 20

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
RAILWAY APPLICATIONS –
ELECTROMAGNETIC COMPATIBILITY –

Part 5: Emission and immunity of fixed
power supply installations and 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
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2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
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5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
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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
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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 62236-5 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 50121-5:2015.
This edition includes the following significant technical changes with respect to the previous
edition:
a) clarification of scope (Clause 1);
b) emission requirement extended in the frequency range 1 GHz to 6 GHz following
IEC 61000-6-4;
c) immunity requirement extended in the frequency range 5,1 GHz to 6 GHz;

– 4 – IEC 62236-5:2018  IEC 2018
d) removal of limits for radiated H-fields in the frequency range 9 kHz to 150 kHz due to the
fact that:
– there are very few outside world victims;
– there is low reproducibility.
This 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
9/2340/FDIS 9/2370/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.
INTRODUCTION
The requirements of this part of IEC 62236 have been specified so as to ensure a level of
electromagnetic emission which will cause minimal disturbance to other equipment. The
levels, however, do not cover the following cases:
a) which may occur with an extremely low probability of occurrence in any location;
b) where highly susceptible apparatus is used in close proximity of the equipment covered by
this document, in which case further measures may have to be taken.
The emission limits given are on the basis that the equipment of the product family range is
installed in traction substation areas.

– 6 – IEC 62236-5:2018  IEC 2018
RAILWAY APPLICATIONS –
ELECTROMAGNETIC COMPATIBILITY –

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

1 Scope
This part of IEC 62236 applies to emission and immunity aspects of EMC for electrical and
electronic apparatus and systems intended for use in railway fixed installations for power
supply. This includes the power feed to the apparatus, the apparatus itself with its protective
control circuits, trackside items such as switching stations, power autotransformers, booster
transformers, substation power switchgear and power switchgear to other longitudinal and
local supplies.
Filters operating at railway system voltage (for example, for harmonic suppression or power
factor correction) are not included in this document since each site has special requirements.
Filters would normally have separate enclosures with separate rules for access. If
electromagnetic limits are required, these will appear in the specification for the equipment.
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 requirements in this
document are not intended to be applicable to the intentional transmission from a radio-
transmitter as defined by the ITU.
The frequency range considered is from DC to 400 GHz. No measurements need to be
performed at frequencies where no requirement is specified.
Emission and immunity limits are given for items of apparatus which are situated:
a) within the boundary of a substation which delivers electric power to a railway;
b) beside the track for the purpose of controlling or regulating the railway power supply,
including power factor correction;
c) along the track for the purpose of supplying electrical power to the railway other than by
means of the conductors used for contact current collection, and associated return
conductors. Included are high voltage feeder systems within the boundary of the railway
which supply substations at which the voltage is reduced to the railway system voltage;
d) beside the track for controlling or regulating electric power supplies to ancillary railway
uses. This category includes power supplies to marshalling yards, maintenance depots
and stations;
e) various other non-traction power supplies from railway sources which are shared with
railway traction.
The immunity levels given in this document apply for:
– vital equipment such as protection devices;
– equipment having connections to the traction power conductors;
– apparatus inside the 3 m zone;
– ports of apparatus inside the 10 m zone with connection inside the 3 m zone;
– ports of apparatus inside the 10 m zone with cable length > 30 m.
Apparatus and systems which are in an environment which can be described as residential,
commercial or light industry, even when placed within the physical boundary of the railway

substation, comply with IEC 61000-6-1 for immunity and IEC 61000-6-3 for emission
requirements.
Excluded from the immunity requirements of this document is power supply apparatus which
is intrinsically immune to the tests defined in Table 1 to Table 6 of this document.
NOTE An example is an 18 MVA 230 kV to 25 kV power supply transformer.
These specific provisions are 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 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 61000-4-4:2012, 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 61000-4-6:2013, Electromagnetic compatibility (EMC) – Part 4-6: Testing and
measurement techniques – Immunity to conducted disturbances, induced by radio-frequency
fields
IEC 61000-4-8:2009, Electromagnetic compatibility (EMC) – Part 4-8: Testing and
measurement techniques – Power frequency magnetic field immunity test
IEC 61000-4-18:2006, Electromagnetic compatibility (EMC) – Part 4-18: Testing and
measurement techniques – Damped oscillatory wave immunity test
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 62236-2:2018, Railway applications – Electromagnetic compatibility – Part 2: Emission of
the whole railway system to the outside world
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:
– 8 – IEC 62236-5:2018  IEC 2018
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1.1
apparatus
device or assembly of devices which can be used as an independent unit for specific functions
[SOURCE: IEC 60050-151:2001, 151-11-22]
3.1.2
environment
surroundings in which a product or system exists, including air, water, land, natural resources,
flora, fauna, humans and their interrelation
[SOURCE: IEC Guide 109:2012, 3.3]
[SOURCE: IEC 60050-901:2013, 901-07-01]
3.1.3
traction substation,
substation,
substation the main function of which is to supply an electric traction system
Note 1 to entry: The synonym substation is used only when the context is clear.
[SOURCE: IEC 60050-811:2017, 811-36-02]
3.1.4
long bus
bus cables with a length of more than 30 m
3.1.5
3 m zone
area along the railway line within a distance of 3 m from the centreline of the nearest track at
both sides of the track
3.1.6
10 m zone
area along the railway line within a distance of 10 m from the centreline of the nearest track at
both sides of the track
3.1.7
railway system voltage
railway system dedicated voltage converted from high voltage
EXAMPLE 25-0-25 kV, 50 Hz; 110 kV, 16,7 Hz.
3.2 Abbreviated terms
AC Alternating current
AM Amplitude modulation
DC Direct current
EMC Electromagnetic compatibility
ITU International Telecommunication Union
r.m.s. Root mean square
4 Performance criteria
The variety and 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. Three general levels of
performance are therefore used, as defined in IEC 62236-1.
5 Emission tests and limits
5.1 Emission from the traction substation to the outside world
Limit values for this emission, over the frequency range 150 kHz to 1 GHz are given in
IEC 62236-2.
Guidance values are given in IEC 62236-2 for emission of DC and power frequency magnetic
fields.
Conductors (overhead or underground) between the substation and the railway are part of the
railway installation, but because of their wide variety of positions and ampere loadings, limit
values cannot be set for the magnetic fields which they produce.
No limits are set for emissions into the active space of the underground railway due to the
complexities of obtaining measurements in the confined space and the lack of a precise
method of relating the measured values to the degree of disturbance which other apparatus
would suffer.
No measurements are necessary for total underground railway systems with no surface
operation.
5.2 Emission test for apparatus operating at less than 1 000 V r.m.s. AC
The emission limits for apparatus covered by this document which is supplied with electrical
power at a voltage below 1 000 V r.m.s. are given on a port by port basis in IEC 61000-6-4.
5.3 Emission values within the boundary of the substation
Because there is such a wide variety of options for the design and the construction of the
substation, limits are not given for emission within the general space inside the boundary of
the substation. Practical measurements have been made and guidance values are given in
Annex A. These are for information only and are not part of the normative content of this
document.
6 Immunity requirements
The immunity test requirements for apparatus covered by this document are given on a port
by port basis in Table 1 to Table 6.
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 tests, the test generator, the test methods, and the test set-up are
given in the Basic Standards which are referred to in Table 1 to Table 6. The contents of the
Basic Standards are not repeated herein, however, modifications or additional information
needed for the practical application of the tests are given in this document.
Where possible, the tests shall be made with a typical operating mode chosen to produce the
maximum susceptibility to disturbance in the frequency band being investigated, consistent

– 10 – IEC 62236-5:2018  IEC 2018
with normal applications. The manufacturer shall define the conditions of the test in the test
plan.
If the apparatus is part of a system or can be connected to auxiliary apparatus, then the
apparatus should preferably be tested while connected to the minimum configuration of
auxiliary apparatus necessary to exercise the test point in accordance with the general
methods of IEC 61000-4 series.
The configuration and mode of operation during the tests shall be precisely noted in the test
report. It is not always possible to test every function of the apparatus; in such cases the most
critical mode of operation should be selected.
The tests shall be carried out within the specified operating range for the apparatus and at its
rated supply voltage.
Some of the immunity levels are higher than those of the heavy industrial Generic Standard,
because this has been found necessary in practice.
Voltages induced by traction currents are not treated here. They have to be covered by the
functional specification (e.g. IEC 62497-1).

Table 1 – Immunity – Enclosure port
Environmental Test Applicability Performance
Basic standard Test set-up Remarks
phenomena specification note criteria
1.1 Radio-frequency 80 MHz to IEC 61000-4-3 IEC 61000-4-3  The test level specified
electromagnetic field. 800 MHz is the r.m.s. value of
Amplitude modulated the unmodulated
10 V/m (r.m.s.) Unmodulated carrier A
carrier
80 % AM,
1 kHz
1.2 Radio-frequency 800 MHz to
electromagnetic field 1 000 MHz
20 V/m (r.m.s.) Unmodulated carrier
80 % AM,
1 kHz
1 400 MHz to
2 000 MHz
The test level specified
10 V/m (r.m.s.) Unmodulated carrier
is the r.m.s. value of
the unmodulated
80 % AM,
carrier
1 kHz
IEC 61000-4-3 IEC 61000-4-3  A
These tests are
2 000 MHz to
intended to simulate
2 700 MHz
disturbances from
digital communication
5 V/m (r.m.s.) Unmodulated carrier
devices
80 % AM,
1 kHz
5 100 MHz to
6 000 MHz
3 V/m (r.m.s.) Unmodulated carrier
80 % AM,
1 kHz
– 12 – IEC 62236-5:2018  IEC 2018

Environmental Test Applicability Performance
Basic standard Test set-up Remarks
phenomena specification note criteria
a
1.3 Power – frequency 16,7 Hz  IEC 61000-4-8 IEC 61000-4-8 See Tests only for
magnetic field applicable frequencies
100 A/m
Testing time is ≥ 10 s
50 Hz / 60 Hz
A
100 A/m
0 Hz
300 A/m
b
1.4 Electrostatic ± 6 kV Contact discharge IEC 61000-4-2 IEC 61000-4-2 See
B
discharge
± 8 kV Air discharge
a
Test only applies to apparatus containing devices sensitive to magnetic fields, e.g. Hall elements, electro-dynamic microphones, etc. Unshielded CRT displays can exhibit
interference effects above 1 A/m (r.m.s.).
b
See basic standard for applicability of contact and/or air discharge test.

Table 2 – Immunity – Ports for signal lines and data buses not involved in process control
Environmental Test Performance
Basic standard Test set-up Applicability note Remarks

phenomena specification criteria
a
2.1 Radio-frequency 0,15 MHz to IEC 61000-4-6 IEC 61000-4-6 See The test level
common mode 80 MHz specified is the
r.m.s. value of the
10 V (r.m.s.) Unmodulated
unmodulated
A
carrier
carrier
80 % AM,
1 kHz
b
Fast transients
2.2 ± 2 kV Peak IEC 61000-4-4 IEC 61000-4-4 See Capacitive clamp
used
5/50 ns T / T
r h
A
5 kHz Repetition
frequency
a
The test level can also be defined as the equivalent current into a 150 Ω load.
b
Applicable only to ports interfacing with cables whose total length according to the manufacturer’s functional specification may exceed 1 m.

Table 3 – Immunity – Ports for process, measurement and control lines, and long bus
Environmental Test Performance
Basic standard Test set-up Applicability note Remarks

phenomena specification criteria
a
3.1 Radio-frequency 0,15 MHz to IEC 61000-4-6 IEC 61000-4-6 See The test level
common mode 80 MHz specified is the
r.m.s. value of the
10 V (r.m.s.) Unmodulated
unmodulated
A
carrier
carrier
80 % AM,
1 kHz
3.2 Damped oscillatory 2,5 kV Line to earth IEC 61000-4-18 IEC 61000-4-18  Both 100 kHz and
voltage 1 MHz
B
1 kV Line to line
(oscillatory waves)
3.3 Fast transients ± 2 kV Peak IEC 61000-4-4 IEC 61000-4-4  Capacitive clamp
used
5/50 ns T / T
r h
A
Repetition
5 kHz
frequency
3.4 Surges 1,2 / 50 µs IEC 61000-4-5 IEC 61000-4-5  All severity levels
below the given
Open circuit test
± 2 kV
severity level have
voltage, line to
to be tested with 5
earth
pulses for each
severity level and
Open circuit test B
± 1 kV
a test sequence
voltage, line to line
not alternating but
starting with one
polarity followed
by the other
polarity.
a
The test level can also be defined as the equivalent current into a 150 Ω load.

– 14 – IEC 62236-5:2018  IEC 2018

Table 4 – Immunity – DC input and DC output power ports
Environmental Test Performance
Basic standard Test set-up Applicability note Remarks
phenomena specification criteria
a
Radio-frequency
4.1 0,15 MHz to IEC 61000-4-6 IEC 61000-4-6 See The test level
common mode 80 MHz specified is the
r.m.s. value of the
10 V (r.m.s.) Unmodulated
unmodulated
A
carrier
carrier
80 % AM,
1 kHz
b
4.2 Fast transients ± 4 kV Peak IEC 61000-4-4 IEC 61000-4-4 See
5/50 ns T / T
r h
A
5 kHz Repetition
frequency
b
Surges
4.3 1,2 / 50 µs IEC 61000-4-5 IEC 61000-4-5 See All severity levels
below the given
± 2 kV Open circuit test
severity level have
voltage, line to
to be tested with 5
earth
pulses for each
severity level and
± 1 kV Open circuit test B
a test sequence
voltage, line to line
not alternating but
starting with one
polarity followed
by the other
polarity.
a
The test level can also be defined as the equivalent current into a 150 Ω load.
b
Not applicable to input ports intended for connection to a battery or a rechargeable battery which shall be removed or disconnected from the apparatus for recharging.

Table 5 – Immunity – AC input and AC output power ports
Environmental Test Performance
Basic standard Test set-up Applicability note Remarks
phenomena specification criteria

a
5.1 Radio-frequency 0,15 MHz to IEC 61000-4-6 IEC 61000-4-6 See The test level
common mode 80 MHz specified is the
r.m.s. value of the
10 V (r.m.s.) Unmodulated
unmodulated
A
carrier
carrier
80 % AM,
1 kHz
5.2 Fast transients ± 4 kV Peak IEC 61000-4-4 IEC 61000-4-4
5/50 ns T / T
r h
A
5 kHz Repetition
frequency
5.3 Surges 1,2 / 50 µs IEC 61000-4-5 IEC 61000-4-5  All severity levels
below the given
± 4 kV Open circuit test
severity level have
voltage, line to
to be tested with 5
earth
pulses for each
severity level and
± 2 kV Open circuit test B
a test sequence
voltage, line to line
not alternating but
starting with one
polarity followed
by the other
polarity.
a
The test level can also be defined as the equivalent current into a 150 Ω load.

– 16 – IEC 62236-5:2018  IEC 2018

Table 6 – Immunity – Earth port
Environmental Test Performance
Basic standard Test set-up Applicability note Remarks
phenomena specification criteria
a, b
6.1 Radio-frequency 0,15 MHz to IEC 61000-4-6 IEC 61000-4-6 See The test level
common mode 80 MHz specified is the
r.m.s. value of the
10 V (r.m.s.) Unmodulated
unmodulated
A
carrier
carrier
80 % AM,
1 kHz
b
6.2 Fast transients ± 1 kV Peak IEC 61000-4-4 IEC 61000-4-4 See
5/50 ns T / T A
r h
5 kHz Rep. frequency
a
The test level can also be defined as the equivalent current into a 150 Ω load.
b
Test may not be practicable with cable length less than 3 m.

7 Fixed power supplies on railway property which are not used for railway
traction purposes
These are used for example for signalling systems, station services, office building services,
freight cranes and yard lighting.
They fall into two categories:
a) those that are supplied from non-railway sources. Examples are supplies from the local
public electricity supplier or from separate generators. These are outside the scope of this
document. For products in the scope of IEC 61000-3-2, IEC 61000-3-3, IEC 61000-3-11 or
IEC 61000-3-12, the requirements of those standards also apply;
b) those that are supplied from railway sources which are shared with train traction. The
supply voltage may have a substantial harmonic content. The levels of immunity and
emission should be defined in agreement between the suppliers and client. Examples are
supplies from tertiary windings on rectifier transformers or from the railway AC overhead
via transformers.
– 18 – IEC 62236-5:2018  IEC 2018
Annex A
(informative)
Emission within the boundary of the substation
for normal operation and during the operation of switches
As part of the programme of work to measure the emission from the boundary of the
substation, measurements were made of emissions at radio frequencies inside the substation
boundary. The antennas were placed in safe positions and fields were measured during
normal operation and during the operation of switches. Peak values of field strength were
found. Similar values were found in both AC and DC systems. Antennas were 3 m from
switches during tests.
A sufficient number of results were obtained to allow Figure A.1 and Figure A.2 to be drawn.
These show the upper boundary of all results, for the frequency range 150 kHz to 1 000 MHz.
Values are peak fields, measured with CISPR 16-1-1 test apparatus and with the
recommended bandwidths.
Values are included in this annex for information only and are not the basis for limits. They
are an indication of the performance of apparatus of different ages and designs, now in use in
traction substations.
Substations have a wide range of configurations, ratings and system voltages. It has not been
found possible to set emission limits for apparatus which will be installed within the boundary
of the substation. Each specific substation will need to be the subject of detailed study to
ensure EMC between the various apparatus used inside the boundary.
100 100
80 80
60 60
40 40
20 20
0 0
150 1 MHz 10 30 100 MHz 1 GHz
kHz MHz MHz
H field E field
IEC
Figure A.1 – Emission from switches – Peak
dBµA/m
dBµV/m
NOTE 1 Operation of switches will generate transient radio fields and when the switch interrupts nominal rated
current under conditions of rated voltage, the emission when measured with CISPR 16-1-1 equipment at 3 m from
the apparatus is not expected to exceed the values shown in Table A.1 and Table A.2.
Table A.1 – Emission from switches (150 kHz to 30 MHz)
Frequency Field, peak
MHz dB(µA/m)
0,15 70
30 40
Measured by a loop antenna with the base between 1 m and 1,5 m above ground
level.
Table A.2 – Emission from switches (30 MHz to 1 000 MHz)
Frequency Field, peak, vertical polarization
MHz dB(µA/m)
30 85
1 000 65
Measured with dipole antennas with the centre of the antenna 3 m above ground
level, the values being the end points of straight lines on dB / log(f) graph.

The measuring distance refers to the distance from the nearest point of the individual item of
apparatus, or its enclosure.
80 80
60 60
0 0
–20
–20
150 1 MHz 10 30 100 MHz
GHz
kHz MHz MHz
H field E field
IEC
Figure A.2 – Emission within substation boundary – Peak
dBµA/m
dBµV/m
– 20 – IEC 62236-5:2018  IEC 2018
NOTE 2 Due to the wide variety of construction, no limits are set for the emission within the substation boundary
(but outside the building). Measurements have been made in typical substations with CISPR 16-1-1 equipment and
the following values in Table A.3 and Table A.4 are representative:
Table A.3 – Emission within substation (150 kHz to 30 MHz)
Frequency Field, peak
MHz dB(µA/m)
0,15 50
30 20
Measured by a loop antenna with the base between 1 m and 1,5 m above ground
level.
Table A.4 – Emission within substation (30 MHz to 1 000 MHz)
Frequency Field, peak, vertical polarization
MHz dB(µA/m)
30 65
1 000 45
Measured with dipole antennas with the centre of the antenna 3 m above ground
level, the values being the end points of straight lines on dB / log(f) graph.

WARNING: There is a danger of electric shock from uninsulated conductors in most
substations and any attempt to measure emissions from these conductors is to be done with
the most careful attention to ensuring safe methods of working.

Bibliography
IEC 61000-3-2:2014, Electromagnetic compatibility (EMC) – Part 3-2: Limits – Limits for
harmonic current emissions (equipment input current up to and including 16 A per phase)
IEC 61000-3-3:2013, Electromagnetic compatibility (EMC) – Part 3-3: Limits – Limitation of
voltage changes, voltage fluctuations and flicker in public low-voltage supply systems, for
equipment with rated current ≤ 16 A per phase and not subject to conditional connection
IEC 61000-3-11:2017, Electromagnetic compatibility (EMC) – Part 3-11: Limits – Limitation of
voltage changes, voltage fluctuations and flicker in public low-voltage supply systems –
Equipment with rated current ≤75 A and subject to conditional connection
IEC 61000-3-12:2011, Electromagnetic compatibility (EMC) – Part 3-12: Limits – Limits for
harmonic currents produced by equipment connected to public low-voltage systems with input
current > 16 A and ≤75 A per phase
IEC 61000-6-1:2016, Electromagnetic compatibility (EMC) – Part 6-1: Generic standards –
Immunity standard for residential, commercial and light-industrial environments
IEC 61000-6-2:2016, Electromagnetic compatibility (EMC) – Part 6-2: Generic standards –
Immunity standard for industrial environments
IEC 61000-6-3:2006, Electromagnetic compatibility (EMC) – Part 6-3: Generic standards –
Emission standard for residential, commercial and light-industrial environments
IEC 61000-6-3:2006/AMD1:2010
IEC 62497-1:2010, Railway applications – Insulation coordination – Part 1: Basic
requirements – Clearances and creepage distances for all electrical and electronic equipment
CISPR 16-1-1:2015, Specification for radio disturbance and immunity measuring apparatus
and methods – Part 1-1: Radio disturbance and immunity measuring apparatus – Measuring
apparatus
___________
– 22 – IEC 62236-5:2018  IEC 2018
SOMMAIRE
AVANT-PROPOS . 23
INTRODUCTION . 25
1 Domaine d'application . 26
2 Références normatives . 27
3 Termes, définitions et termes abrégés . 28
3.1 Termes et définitions . 28
3.2 Termes abrégés . 29
4 Critères d'aptitude à la fonction . 29
5 Essais d’émission et limites . 29
5.1 Émissions de la sous-station de traction d’alimentation vers le monde

extérieur . 29
5.2 Essai d’émission pour les appareils fonctionnant à des tensions inférieures à
1 000 V en valeur efficace en courant alternatif . 29
5.3 Valeurs d’émission à l’intérieur des limites de la sous-station . 29
6 Exigences d’immunité . 30
7 Alimentations fixes se trouvant sur une propriété ferroviaire qui ne sont pas
utilisées pour la traction ferroviaire . 37
Annexe A (informative) Émission dans les limites de la sous-station pour

fonctionnement normal et pendant le fonctionnement des appareils de coupure. 38
Bibliographie . 42

Figure A.1 – Émission crête des appareils de coupure . 39
Figure A.2 – Émission crête dans les limites de la sous-station . 40

Tableau 1 – Immunité – Accès par l'enveloppe . 31
Tableau 2 – Immunité – Accès pour lignes de signaux et bus de données
...