IEC 62236-4:2008
(Main)Railway applications - Electromagnetic compatibility - Part 4: Emission and immunity of the signalling and telecommunications apparatus
Railway applications - Electromagnetic compatibility - Part 4: Emission and immunity of the signalling and telecommunications apparatus
IEC 62236-4:2008 specifies limits for emission and immunity and provides performance criteria for signalling and telecommunications apparatus which may interfere with other apparatus in the railway environment, or increase the total emissions for the railway environment beyond the limits defined in the appropriate standard and so risk causing electromagnetic interference to apparatus outside the railway system. The main change with respect to the previous edition consists of the requirements for the radiated immunity test.
Applications ferroviaires - Compatibilité électromagnétique - Partie 4: Emission et immunité des appareils de signalisation et de télécommunication
La CEI 62236-4:2008 spécifie les limites d'émission et d'immunité et donne les critères d'aptitude à la fonction pour les appareils de signalisation et de télécommunication qui peuvent perturber d'autres appareils dans l'environnement ferroviaire ou augmenter les émissions totales pour l'environnement ferroviaire au-delà des limites définies dans la norme appropriée et qui risquent ainsi d'être la cause d'un brouillage électromagnétique pour des appareils à l'extérieur du système ferroviaire. Les modification principales par rapport à l'édition précédente concernent les exigences pour l'essai d'immunité rayonnée.
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Standards Content (Sample)
IEC 62236-4
Edition 2.0 2008-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Railway applications – Electromagnetic compatibility –
Part 4: Emission and immunity of the signalling and telecommunications
apparatus
Applications ferroviaires – Compatibilité électromagnétique –
Partie 4: Emission et immunité des appareils de signalisation et de
télécommunication
IEC 62236-4:2008
---------------------- Page: 1 ----------------------
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IEC 62236-4
Edition 2.0 2008-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Railway applications – Electromagnetic compatibility –
Part 4: Emission and immunity of the signalling and telecommunications
apparatus
Applications ferroviaires – Compatibilité électromagnétique –
Partie 4: Emission et immunité des appareils de signalisation et de
télécommunication
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
P
CODE PRIX
ICS 45.060 ISBN 978-2-88910-649-3
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
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– 2 – 62236-4 © IEC:2008
CONTENTS
FOREWORD.3
INTRODUCTION.5
1 Scope.6
2 Normative references .7
3 Terms and definitions .7
4 Description of location .8
5 Emission limits for apparatus.8
6 Immunity .8
6.1 Performance criteria .8
6.2 Test requirements .8
Bibliography.15
Figure 1 – Main categories of ports.8
Table 1 – Immunity – Enclosure port.10
Table 2 – Immunity – I/O port.11
Table 3 – Immunity – DC power ports .12
Table 4 – Immunity – AC power ports .13
Table 5 – Immunity – Earth port .14
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62236-4 © IEC:2008 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
RAILWAY APPLICATIONS –
ELECTROMAGNETIC COMPATIBILITY –
Part 4: Emission and immunity of the signalling
and telecommunications apparatus
FOREWORD
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62236-4 has been prepared by IEC technical committee 9:
Electrical equipment and systems for railways.
This second edition cancels and replaces the first edition published in 2003. It constitutes a
technical revision and is based on EN 50121-4:2006.
The main changes with respect to the previous edition are listed below:
– requirements for the radiated immunity test of line 1.2 in Table 1;
– suppression of annex A.
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– 4 – 62236-4 © IEC:2008
The text of this standard is based on the following documents:
FDIS Report on voting
9/1188/FDIS 9/1216/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts of 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 publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
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62236-4 © IEC:2008 – 5 –
INTRODUCTION
This part of IEC 62236 has been prepared in the form of a product standard.
It defines the immunity and emission test requirements for apparatus defined in the scope in
relation to the electromagnetic disturbances likely to be experienced in the railway. In
particular, the test requirements represent the essential electromagnetic immunity
requirements and have been selected to ensure an adequate level of immunity for apparatus
installed in the railway locations.
Test requirements are specified for each port considered.
Safety considerations are not covered by this standard.
In special situations, where the level of disturbances may exceed the levels considered in this
standard, for example at a special location or where a hand-held transmitter is used in very
close proximity to an apparatus, special mitigation measures may be necessary.
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RAILWAY APPLICATIONS –
ELECTROMAGNETIC COMPATIBILITY –
Part 4: Emission and immunity of the signalling
and telecommunications apparatus
1 Scope
This part of IEC 62236 applies to signalling and telecommunication apparatus which is
installed in the railway environment. Signalling and telecommunication apparatus mounted in
vehicles is covered by IEC 62236-3-2.
This standard specifies limits for emission and immunity and provides performance criteria for
signalling and telecommunications (S&T) apparatus which may interfere with other apparatus
in the railway environment, or increase the total emissions for the railway environment beyond
the limits defined in the appropriate standard and so risk causing Electro-Magnetic
Interference (EMI) to apparatus outside the railway system.
Apparatus which complies with the emission levels of IEC 61000-6-4 will meet the emission
requirements of this standard provided that emissions from any d.c. power port are within the
emissions limits specified for a.c. power ports. The immunity levels of IEC 61000-6-2 will also
be adequate except for the special case of apparatus as defined in Note 1 of Table 1. This
standard provides the immunity requirements for such apparatus.
The immunity levels given for the apparatus will in most cases allow the apparatus to perform
as intended in the railway environment (see Note). The immunity level establishes a common
reference for evaluating the performance of the apparatus when subject to interference
resulting from direct exposure of the apparatus and associated cables to a radio frequency
field, or by coupling of the interference from a remote source.
If a port is intended to transmit or receive for the purpose of radio communication (intentional
radiators, e.g. transponder systems), then the emission and immunity limits in this standard at
the communication frequency do not apply.
The standard does not specify basic personal safety requirements for apparatus such as
protection against electric shock, unsafe operation, insulation co-ordination and related
dielectric tests. The requirements were developed for and are applicable to this set of
apparatus when operating under normal conditions. Fault conditions of the apparatus have
not been taken into account.
The requirements and test methods also apply to telecommunications and signalling data and
power lines connected to the equipment under test (EUT).
The frequency range considered is from d.c. to 400 GHz. No measurements need to be
performed at frequencies where no requirement is specified.
For products in the scope of IEC 61000-3-2 or IEC 61000-3-3, the requirements of those
standards apply.
Testing methods are given in the basic standards listed in Clause 2.
These specific provisions are to be used in conjunction with the general provisions in
IEC 62236-1.
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62236-4 © IEC:2008 – 7 –
NOTE The immunity and emission levels do not of themselves guarantee that the integration of apparatus will
necessarily be satisfactory. The standard cannot cover all the possible configurations of the apparatus, but the test
levels are sufficient to achieve satisfactory EMC in the majority of cases.
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
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, Electromagnetic compatibility (EMC) – Part 4-2: Testing and measurement
techniques – Electrostatic discharge immunity test
IEC 61000-4-3, Electromagnetic compatibility (EMC) – Part 4-3: Testing and measurement
techniques – Radiated, radio-frequency, electromagnetic field immunity test
IEC 61000-4-4, Electromagnetic compatibility (EMC) – Part 4-4: Testing and measurement
techniques – Electrical fast transient/burst immunity test
IEC 61000-4-5, Electromagnetic compatibility (EMC) – Part 4-5: Testing and measurement
techniques – Surge immunity test
IEC 61000-4-6, Electromagnetic compatibility (EMC) – Part 4-6: Testing and measurement
techniques – Immunity to conducted disturbances, induced by radio-frequency fields
IEC 61000-4-8, Electromagnetic compatibility (EMC) – Part 4-8: Testing and measurement
techniques – Power frequency magnetic field immunity test
IEC 61000-4-9, Electromagnetic compatibility (EMC) – Part 4-9: Testing and measurement
techniques – Pulse magnetic field immunity test
IEC 61000-6-2, Electromagnetic compatibility (EMC) – Part 6-2: Generic standards –
Immunity for industrial environments
IEC 61000-6-4, Electromagnetic compatibility (EMC) – Part 6-4: Generic standards –
Emission standard for industrial environments
IEC 62236-1, Railway applications – Electromagnetic compatibility – Part 1: General
IEC 62236-3-2, Railway applications – Electromagnetic compatibility – Part 3-2: Rolling stock
– Apparatus
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
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3.1
port
particular interface of the specified apparatus with the external environment, for example a.c.
power port, d.c. power port, I/O (input/output) port, earth port
3.2
enclosure port
physical boundary of the apparatus through which electromagnetic fields may radiate or
impinge (see Figure 1)
Enclosure port
AC power port I/O port
DC power port APPARATUS Earth port
IEC 2187/08
Figure 1 – Main categories of ports
4 Description of location
The railway environment is characterised as described in IEC 62236-1. Special consideration
is given in this standard to apparatus intended to be installed within 3 m of the centreline of
the nearest track and as defined in Note 1 of Table 1.
NOTE Tests covering compatibility with specific items of signalling equipment may be required.
5 Emission limits for apparatus
The maximum emissions permitted by IEC 61000-6-4 shall be complied with. The conducted
emission limits shall apply to both a.c. and d.c. power ports. A measurement distance of 10 m
may be used with the limits increased by 10 dB for the radiated emission of the enclosure
port. Where the apparatus is intended to be used in an environment other than the railway
environment, then the emission limits given in the appropriate standards shall apply.
If the field-strength measurement at 10 m or 30 m cannot be made because of high ambient
noise levels, or for other reasons, measurements may be made at a closer distance, for
example 3 m. An inverse proportionality factor of 20 dB per decade should be used to
normalize the measured data to the specified distance for determining compliance. Care
should be taken in the measurement of large EUTs at 3 m at frequencies near 30 MHz, due to
the near field effects.
6 Immunity
6.1 Performance criteria
It is impossible to define precise criteria for the evaluation of the apparatus within the scope
of this standard, but performance criteria are as specified in IEC 62236-1, unless otherwise
stated.
6.2 Test requirements
The immunity requirements for apparatus covered by this standard are given on a port by port
basis.
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62236-4 © IEC:2008 – 9 –
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 the basic
standards referred to in Tables 1 to 5. If the apparatus has a large number of similar 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.
The contents of the basic standards are not repeated here; however, additional information
needed for the practical application of the tests is given where appropriate.
Voltages induced by traction currents are not treated here. They have to be covered by the
functional specification.
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Table 1 – Immunity – Enclosure port
Environmental Test Basic
Test set-up Remarks Performance criteria
phenomena specification standard
1.1 Radio-frequency 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 Notes 1 and 3
2 100 MHz
Unmodulated carrier
The test level specified is
A
10 V/m (r.m.s) IEC 61000-4-3 IEC 61000-4-3
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 See Notes 1 and 2
magnetic field
100 A/m (r.m.s) IEC 61000-4-8 IEC 61000-4-8 All frequencies have to be
tested
A
0 Hz d.c. systems See Notes 1 and 2
300 A/m
1.4 Electrostatic discharge ± 6 kV Contact discharge IEC 61000-4-2 IEC 61000-4-2 See Note 4
B
Air discharge
± 8 kV
1.5 Pulsed magnetic field 300 A/m IEC 61000-4-9 IEC 61000-4-9 See Note 1 B
NOTE 1 The tests given apply to apparatus inside 3 m – zone and vital equipment such as interlocking or command and control which are mounted in areas where a high risk of
interference from mobile radio telephones has been identified. For other apparatus within the railway environment, requirements of IEC 61000-6-2 apply.
NOTE 2 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 1 A/m (r.m.s.).
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62236-4 © IEC:2008 – 11 –
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 Only applicable to equipment accessible to members of the public and operational staff (not maintenance).
Table 2 – Immunity – I/O port
Environmental Test Basic
Test set-up Remarks Performance criteria
phenomena specification standard
2.1 Radio-frequency 0,15 MHz to 80 MHz IEC 61000-4-6 IEC 61000-4-6 See Notes 1, 2 and 5
common mode
10 V (r.m.s.) Unmodulated carrier The test level specified is
A
the r.m.s. value of the
80 % AM, 1 kHz
unmodulated carrier
2.2 Fast transients ± 2 kV Peak IEC 61000-4-4 IEC 61000-4-4 See Note 1
T / T Capacitive clamp used A
5/50 ns r h
Repetition frequency
5 kHz
2.3 Surges 1,2 / 50 μs IEC 61000-4-5 IEC 61000-4-5 See Notes 1, 3 and 4
Open circuit test
± 2 kV
voltage, line to earth
B
Open circuit test
± 1 kV
voltage, line to line
NOTE 1 This test applies to I/O port connected to cable inside 3 m - boundary or connected to cable longer than 30 m within 10 m boundary.
I/O ports connected to cable other than above should comply with the requirements of IEC 61000-6-2 except that Note 2 of Table 3 of IEC 61000-6-2 is not applicable.
NOTE 2 Applicable only to ports interfacing with cables whose total length according to the manufacturer’s specification may exceed 3 m.
NOTE 3 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 are recommended.
NOTE 4 For telecommunication ports and other ports intended for connection to highly balanced pairs, a line to line test is not required.
NOTE 5 The test level can also be defined as the equivalent current into a 150 Ω load.
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Table 3 – Immunity – DC power ports
Environmental Test Basic
Test set-up Remarks Performance criteria
phenomena specification standard
3.1 Radio-frequency 0,15 MHz to 80 MHz IEC 61000-4-6 IEC 61000-4-6 See Note 2
common mode
10 V (r.m.s.) Unmodulated carrier The test level specified is
A
the r.m.s. value of the
80 % AM, 1 kHz
unmodulated carrier
3.2 Fast transients Peak IEC 61000-4-4 IEC 61000-4-4
± 2 kV
T / T
5/50 ns r h A
5 kHz Repetition frequency
3.3 Surges IEC 61000-4-5 IEC 61000-4-5 See Note 1
1,2 / 50 μs
Open circuit test
± 2 kV
voltage, line to earth B
Open circuit test
± 1 kV
voltage, line to line
NOTE 1 This test is intended to replicate the phenomena known as direct coupling. When the power supply is isolated from earth, an output impedance of 42 Ω (40 Ω and 2 Ω
generator) and a coupling capacitance of 0,5 μF are recommended. When the power supply is not isolated from earth, an output impedance of 12 Ω (10 Ω and 2 Ω generator)
and a coupling capacitance of 9 μF are recommended. These requirements are for cable-length above 30 m.
NOTE 2 The test level can also be defined as the equivalent current into a 150 Ω load.
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62236-4 © IEC:2008 – 13 –
Table 4 – Immunity – AC power ports
Environmental Test Basic
Test set-up Remarks Performance criteria
phenomena specification standard
4.1 Radio-frequency 0,15 MHz to 80 MHz IEC 61000-4-6 IEC 61000-4-6 See Note 2
common mode
10 V (r.m.s.) Unmodulated carrier The test level specified is
A
the r.m.s. value of the
80 % AM, 1 kHz
unmodulated carrier
4.2 Fast transients Peak IEC 61000-4-4 IEC 61000-4-4
± 2 kV
T / T
5/50 ns r h A
5 kHz Repetition frequency
4.3 Surges IEC 61000-4-5 IEC 61000-4-5 See Note 1
1,2 / 50 μs
Open circuit test
± 2 kV
voltage, line to earth B
Open circuit test
± 1 kV
voltage, line to line
NOTE 1 This test is intended to replicate the phenomena known as direct coupling; hence an output impedance of 12 Ω (10 Ω and 2 Ω generator) and a coupling capacitance of
9 μF are recommended.
NOTE 2 The test level can also be defined as the equivalent current into a 150 Ω load.
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Table 5 – Immunity – Earth port
Environmental Test Basic
Test set-up Remarks Performance criteria
phenomena specification standard
5.1 Radio-frequency 0,15 MHz to 80 MHz IEC 61000-4-6 IEC 61000-4-6 See Notes 1 and 2
common mode
10 V (r.m.s.) Unmodulated carrier The test level specified is
A
the r.m.s. value of the
80 % AM, 1 kHz
unmodulated carrier
5.2 Fast transients Peak IEC 61000-4-4 IEC 61000-4-4 See Note 1
± 1 kV
5/50 ns T / T
A
r h
5 kHz
Rep. frequency
NOTE 1 The test may not be practicable with a cable length of less than 3 m.
NOTE 2 The test level can also be defined as the equivalent current into a 150 Ω load.
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