SIST EN 61326-3-1:2008
(Main)Electrical equipment for measurement, control and laboratory use - EMC requirements -- Part 3-1: Immunity requirements for safety-related systems and for equipment intended to perform safety-related functions (functional safety) - General industrial applications
Electrical equipment for measurement, control and laboratory use - EMC requirements -- Part 3-1: Immunity requirements for safety-related systems and for equipment intended to perform safety-related functions (functional safety) - General industrial applications
The scope of IEC 61326-1 applies to this part of IEC 61326 but is limited to systems and equipment for industrial applications intended to perform safety functions as defined in IEC 61508 with SIL 1-3. The electromagnetic environments encompassed by this product family standard are industrial, both indoor and outdoor, as described for industrial locations in IEC 61000-6-2 or defined in 3.7 of IEC 61326-1. Equipment and systems intended for use in other electromagnetic environments, for example, in the process industry or in environments with potentially explosive atmospheres, are excluded from the scope of this product family standard, IEC 61326-3-1. Equipment and systems considered as "proven-in-use" according to IEC 61508 or IEC 61511 are excluded from the scope of IEC 61326-3-1. Fire alarm systems and security alarm systems intended for protection of buildings are excluded from the scope of IEC 61326-3-1.
Elektrische Mess-, Steuer-, Regel- und Laborgeräte - EMV-Anforderungen - Teil 3-1: Störfestigkeitsanforderungen für sicherheitsbezogene Systeme und für Geräte, die für sicherheitsbezogene Funktionen vorgesehen sind (Funktionale Sicherheit) - Allgemeine industrielle Anwendungen
Matériel électrique de mesure, de commande et de laboratoire - Exigences relatives à la CEM -- Partie 3-1: Exigences d'immunité pour les systèmes relatifs à la sécurité et pour les matériels destinés à réaliser des fonctions relatives à la sécurité (sécurité fonctionnelle) - Applications industrielles générales
La CEI 61326-1 est applicable à la présente partie de la CEI 61326, mais elle est limitée aux systèmes et matériels pour applications industrielles destinés à réaliser des fonctions de sécurité telles que définies dans la CEI 61508, avec un niveau d'intégrité de sécurité (SIL) 1-3. Les environnements électromagnétiques considérés par cette famille de normes produit sont des environnements industriels, en bâtiment et en extérieur, tels que décrits pour les emplacements industriels dans la CEI 61000-6-2 ou définis en 3.7 de la CEI 61326-1. Les matériels et les systèmes pour une utilisation dans d'autres environnements électromagnétiques, par exemple dans l'industrie de processus ou dans des environnements avec des atmosphères potentiellement explosives sont exclus du domaine d'application de la norme CEI 61326-3-1, qui est une norme de famille de produits. Le contenu du corrigendum de septembre 2008 a été pris en considération dans cet exemplaire.
Električna oprema za merjenje, nadzor in laboratorijsko uporabo - Zahteve elektromagnetne združljivost (EMC) - 3-1. del: Zahteve za odpornost opreme, ki opravlja ali pa je namenjena za opravljanje funkcij povezanih z varnostjo (funkcijska varnost) - Splošna industrijska uporaba (IEC 61326-3-1:2008)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 61326-3-1:2008
01-september-2008
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SIST EN 61326:1998
SIST EN 61326:1998/A1:1998
SIST EN 61326:1998/A2:2002
SIST EN 61326:1998/A3:2004
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HOHNWURPDJQHWQH]GUXåOMLYRVW (0& GHO =DKWHYH]DRGSRUQRVWRSUHPHNL
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Electrical equipment for measurement, control and laboratory use - EMC requirements --
Part 3-1: Immunity requirements for safety-related systems and for equipment intended
to perform safety-related functions (functional safety) - General industrial applications
Elektrische Mess-, Steuer-, Regel- und Laborgeräte - EMV-Anforderungen - Teil 3-1:
Störfestigkeitsanforderungen für sicherheitsbezogene Systeme und für Geräte, die für
sicherheitsbezogene Funktionen vorgesehen sind (Funktionale Sicherheit) - Allgemeine
industrielle Anwendungen
Ta slovenski standard je istoveten z: EN 61326-3-1:2008
ICS:
25.040.40 Merjenje in krmiljenje Industrial process
industrijskih postopkov measurement and control
33.100.20 Imunost Immunity
SIST EN 61326-3-1:2008 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 61326-3-1:2008
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SIST EN 61326-3-1:2008
EUROPEAN STANDARD
EN 61326-3-1
NORME EUROPÉENNE
June 2008
EUROPÄISCHE NORM
ICS 25.040.40; 33.100.20 Partially supersedes EN 61326:1997 + A1:1998 + A2:2002 + A3:2003
English version
Electrical equipment for measurement, control and laboratory use -
EMC requirements -
Part 3-1: Immunity requirements for safety-related systems
and for equipment intended to perform safety-related functions
(functional safety) -
General industrial applications
(IEC 61326-3-1:2008)
Matériel électrique de mesure, Elektrische Mess-, Steuer-,
de commande et de laboratoire - Regel- und Laborgeräte -
Exigences relatives à la CEM - EMV-Anforderungen -
Partie 3-1: Exigences d'immunité Teil 3-1: Störfestigkeitsanforderungen
pour les systèmes relatifs à la sécurité für sicherheitsbezogene Systeme und
et pour les matériels destinés à réaliser des für Geräte, die für sicherheitsbezogene
fonctions relatives à la sécurité (sécurité Funktionen vorgesehen sind
fonctionnelle) - (Funktionale Sicherheit) -
Applications industrielles générales Allgemeine industrielle Anwendungen
(CEI 61326-3-1:2008) (IEC 61326-3-1:2008)
This European Standard was approved by CENELEC on 2008-06-01. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61326-3-1:2008 E
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SIST EN 61326-3-1:2008
EN 61326-3-1:2008 - 2 -
Foreword
The text of document 65A/500/FDIS, future edition 1 of IEC 61326-3-1, prepared by SC 65A, System
aspects, of IEC TC 65, Industrial-process measurement, control and automation, was submitted to the
IEC-CENELEC parallel vote and was approved by CENELEC as EN 61326-3-1 on 2008-06-01.
The EN 61326 series supersedes EN 61326:1997 + corrigendum September 1998 + A1:1998 + A2:2001
+ A3:2003.
This standard is to be used in conjunction with EN 61326-1.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
(dop) 2009-03-01
national standard or by endorsement
– latest date by which the national standards conflicting
(dow) 2011-06-01
with the EN have to be withdrawn
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61326-3-1:2008 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 60204-1 NOTE Harmonized as EN 60204-1:2006 (modified).
IEC 61508-4 NOTE Harmonized as EN 61508-4:2001 (not modified).
IEC 61511 NOTE Harmonized in EN 61511 series (not modified).
__________
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SIST EN 61326-3-1:2008
- 3 - EN 61326-3-1:2008
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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.
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year
1)
IEC 60050-161 - International Electrotechnical Vocabulary - -
(IEV) -
Chapter 161: Electromagnetic compatibility
IEC 61000-4-2 1995 Electromagnetic compatibility (EMC) - EN 61000-4-2 1995
A1 1998 Part 4-2: Testing and measurement A1 1998
A2 2000 techniques - Electrostatic discharge A2 2001
immunity test
IEC 61000-4-3 2006 Electromagnetic compatibility (EMC) - EN 61000-4-3 2006
Part 4-3: Testing and measurement
techniques - Radiated, radio-frequency,
electromagnetic field immunity test
IEC 61000-4-4 2004 Electromagnetic compatibility (EMC) - EN 61000-4-4 2004
Part 4-4: Testing and measurement
techniques - Electrical fast transient/burst
immunity test
IEC 61000-4-5 2005 Electromagnetic compatibility (EMC) - EN 61000-4-5 2006
Part 4-5: Testing and measurement
techniques - Surge immunity test
IEC 61000-4-6 2003 Electromagnetic compatibility (EMC) -
+ A1 2004 Part 4-6: Testing and measurement
+ A2 2006 techniques - Immunity to conducted EN 61000-4-6 2007
disturbances, induced by radio-frequency + corr. August 2007
fields
IEC 61000-4-8 1993 Electromagnetic compatibility (EMC) - EN 61000-4-8 1993
A1 2000 Part 4-8: Testing and measurement A1 2001
techniques - Power frequency magnetic field
immunity test
IEC 61000-4-11 2004 Electromagnetic compatibility (EMC) - EN 61000-4-11 2004
Part 4-11: Testing and measurement
techniques - Voltage dips, short interruptions
and voltage variations immunity tests
IEC 61000-4-16 1998 Electromagnetic compatibility (EMC) - EN 61000-4-16 1998
A1 2001 Part 4-16: Testing and measurement A1 2004
techniques - Test for immunity to conducted,
common mode disturbances in the frequency
range 0 Hz to 150 kHz
1)
Undated reference.
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SIST EN 61326-3-1:2008
EN 61326-3-1:2008 - 4 -
Publication Year Title EN/HD Year
IEC 61000-4-29 2000 Electromagnetic compatibility (EMC) - EN 61000-4-29 2000
Part 4-29: Testing and measurement
techniques - Voltage dips, short interruptions
and voltage variations on d.c. input power port
immunity tests
IEC 61000-6-2 2005 Electromagnetic compatibility (EMC) - EN 61000-6-2 2005
Part 6-2: Generic standards - Immunity for + corr. September 2005
industrial environments
IEC 61326-1 2005 Electrical equipment for measurement, EN 61326-1 2006
control and laboratory use - EMC
requirements -
Part 1: General requirements
IEC 61326-2-1 2005 Electrical equipment for measurement, EN 61326-2-1 2006
control and laboratory use - EMC
requirements -
Part 2-1: Particular requirements - Test
configurations, operational conditions and
performance criteria for sensitive test and
measurement equipment for EMC unprotected
applications
IEC 61326-2-2 2005 Electrical equipment for measurement, EN 61326-2-2 2006
control and laboratory use - EMC
requirements -
Part 2-2: Particular requirements - Test
configurations, operational conditions and
performance criteria for portable test,
measuring and monitoring equipment used in
low-voltage distribution systems
IEC 61326-2-3 2006 Electrical equipment for measurement, EN 61326-2-3 2006
control and laboratory use - EMC
requirements -
Part 2-3: Particular requirements - Test
configuration, operational conditions and
performance criteria for transducers with
integrated or remote signal conditioning
IEC 61326-2-4 2006 Electrical equipment for measurement, EN 61326-2-4 2006
control and laboratory use - EMC
requirements -
Part 2-4: Particular requirements - Test
configurations, operational conditions and
performance criteria for insulation monitoring
devices according to IEC 61557-8 and for
equipment for insulation fault location
according to IEC 61557-9
IEC 61326-2-5 2006 Electrical equipment for measurement, EN 61326-2-5 2006
control and laboratory use - EMC
requirements -
Part 2-5: Particular requirements - Test
configurations, operational conditions and
performance criteria for field devices with
interfaces according to IEC 61784-1, CP 3/2
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SIST EN 61326-3-1:2008
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Publication Year Title EN/HD Year
IEC 61326-3-2 2008 Electrical equipment for measurement, EN 61326-3-2 2008
control and laboratory use - EMC
requirements -
Part 3-2: Immunity requirements for safety-
related systems and for equipment intended to
perform safety-related functions (functional
safety) - Industrial applications with specified
electromagnetic environment
IEC 61508-2 2000 Functional safety of EN 61508-2 2001
electrical/electronic/programmable electronic
safety-related systems -
Part 2: Requirements for
electrical/electronic/programmable electronic
safety-related systems
ISO/IEC Guide 51 1999 Safety aspects - Guidelines for their inclusion - -
in standards
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SIST EN 61326-3-1:2008
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SIST EN 61326-3-1:2008
IEC 61326-3-1
Edition 1.0 2008-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrical equipment for measurement, control and laboratory use – EMC
requirements –
Part 3-1: Immunity requirements for safety-related systems and for equipment
intended to perform safety-related functions (functional safety) – General
industrial applications
Matériel électrique de mesure, de commande et de laboratoire – Exigences
relatives à la CEM –
Partie 3-1: Exigences d'immunité pour les systèmes relatifs à la sécurité et pour
les matériels destinés à réaliser des fonctions relatives à la sécurité (sécurité
fonctionnelle) – Applications industrielles générales
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
W
CODE PRIX
ICS 25.040.40; 33.100.20 ISBN 2-8318-9509-X
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SIST EN 61326-3-1:2008
– 2 – 61326-3-1 © IEC:2008
CONTENTS
FOREWORD.4
INTRODUCTION.6
1 Scope.9
2 Normative references .9
3 Terms and definitions .11
4 General .13
5 EMC test plan.13
5.1 General .13
5.2 Configuration of EUT during testing.14
5.2.1 General .14
5.2.2 Composition of EUT.14
5.2.3 Assembly of EUT.14
5.2.4 I/O ports .14
5.2.5 Auxiliary equipment .14
5.2.6 Cabling and earthing (grounding).14
5.3 Operation conditions of EUT during testing.14
5.3.1 Operation modes .14
5.3.2 Environmental conditions.14
5.3.3 EUT software during test .15
5.4 Specification of performance criteria .15
5.5 Test description.15
6 Performance criteria .15
6.1 Performance criteria A, B and C .15
6.2 Performance criterion FS.15
6.3 Application of the performance criterion FS .16
7 Immunity requirements .16
8 Test set-up and test philosophy for EUTs with functions intended for safety
applications .22
8.1 Testing of safety-related systems and equipment intended to be used in
safety-related systems .22
8.2 Test philosophy for equipment intended for use in safety-related systems.23
8.3 Test philosophy for safety-related systems .24
8.4 Test configuration.24
8.5 Monitoring .24
9 Test results and test report.25
Annex A (informative) Evaluation of electromagnetic phenomena .29
Annex B (informative) Allowed effects during immunity tests.33
Bibliography.38
Figure 1 – Correlation between the standards IEC 61326-1, IEC 61326-2-X,
IEC 61326-3-1 and IEC 61326-3-2 .8
Figure 2 – Typical test set-up for equipment intended for use in a safety-related system
integrated into a representative safety-related system during test .26
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SIST EN 61326-3-1:2008
61326-3-1 © IEC:2008 – 3 –
Figure 3 – Typical test set-up for equipment intended for use in safety-related system
tested stand-alone .27
Figure 4 – Typical test set-up for a safety-related system .28
Figure A.1 – Emission/immunity levels and compatibility level, with an example of
emission/immunity levels for a single emitter and susceptor, as a function of some
independent variables (see IEC 61000-1-1) .30
Table 1a – Immunity test requirements for equipment intended for use in industrial
locations – Enclosure port.17
Table 1b – Immunity test requirements for equipment intended for use in industrial
locations – Input and output a.c. power ports .18
Table 1c – Immunity test requirements for equipment intended for use in industrial
locations – Input and output d.c. power ports .19
Table 1d – Immunity test requirements for equipment intended for use in industrial
locations – I/O signal/control ports .20
Table 1e – Immunity test requirements for equipment intended for use in industrial
locations – I/O signal/control ports connected direct to power supply networks .21
Table 1f – Immunity test requirements for equipment intended for use in industrial
locations – Functional earth port .21
Table 2 – Selected frequencies for electromagnetic field tests .22
Table 3 – Selected frequencies for conducted r.f. tests .22
Table 4 – Applicable performance criteria and observed behaviour during test for
equipment intended for use in safety-related systems .23
Table A.1 – Exemplary considerations on electromagnetic phenomena and test levels
with regard to functional safety in industrial applications.32
Table B.1 – Allowed effects during immunity tests on functions of equipment.34
Table B.2 – Allowed effects during immunity tests on functions of a system .36
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INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICAL EQUIPMENT FOR MEASUREMENT,
CONTROL AND LABORATORY USE –
EMC REQUIREMENTS –
Part 3-1: Immunity requirements for safety-related
systems and for equipment intended to perform
safety-related functions (functional safety) –
General industrial applications
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
in the subject dealt with may participate in this preparatory work. International, governmental and non-
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
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
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 61326-3-1 has been prepared by subcommittee 65A: System
aspects, of IEC technical committee 65: Industrial-process measurement and control.
The IEC 61326 series cancels and replaces IEC 61326:2002 and constitutes a technical
revision.
IEC 61326-3-1 is to be read in conjunction with IEC 61326-1.
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SIST EN 61326-3-1:2008
61326-3-1 © IEC:2008 – 5 –
The text of this standard is based on the following documents:
FDIS Report on voting
65A/500/FDIS 65A/505/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 the parts of the IEC 61326 series, under the general title Electrical equipment for
measurement, control and laboratory use – EMC requirements, 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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SIST EN 61326-3-1:2008
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INTRODUCTION
Functional safety is that part of the overall safety relating to the equipment under control
(EUC) and the EUC control system which depends on the correct functioning of the electrical
safety-related systems. To achieve this all items of equipment of the safety-related system
which are involved in the performance of the safety functions must behave in a specified
manner under all relevant conditions.
The IEC basic safety publication for functional safety of electrical/electronic/programmable
electronic safety-related systems is IEC 61508. It sets the overall requirements to achieve
functional safety. Sufficient immunity to electromagnetic disturbances is one of those
requirements.
The concept of IEC 61508 distinguishes between the consideration of the application and the
design of safety-related electrical and electronic systems. The interface between both is the
safety requirements specification (SRS). It specifies all relevant requirements of the intended
application, as follows.
a) Definition of the safety function, based on a risk assessment of the intended
application (which function is intended to reduce risk).
b) Appropriate safety integrity level (SIL) for each safety-function based on a risk
assessment of the intended application.
c) Definition of the environment in which the system is intended to work including the
electromagnetic environment as required by IEC 61508-2.
Hence, with regard to immunity against electromagnetic phenomena, the essential starting
point is that the electromagnetic environment and its phenomena are considered in the SRS,
as required by IEC 61508. The safety-related system intended to implement the specified
safety function has to fulfil the SRS, and, from it, corresponding immunity requirements have
to be derived for the items of equipment, which results in an equipment requirement
specification. With respect to the electromagnetic environment, the SRS and the equipment
requirement specification should be based on a competent assessment of the foreseeable
electromagnetic threats in the real environment over the whole operational life of the
equipment. Hence, immunity requirements for the equipment depend on the characteristics of
the electromagnetic environment in which the equipment is intended to be used.
The equipment manufacturer, therefore, has to prove that the equipment fulfils the equipment
requirement specification and the system integrator must prove that the system fulfils the
SRS. Evidence has to be produced by application of appropriate methods. They do not need
to consider any other aspects of the application, for example, risk of the application
associated to any failure of the safety-related system. The objective is for all equipment in the
system to comply with particular performance criteria taking into account functional safety
aspects (for example, the performance criterion FS) up to levels specified in the SRS
independent of the required safety integrity level (SIL).
There are basically two approaches on how to deal with the electromagnetic environments
and to conclude on immunity requirements.
(A) To consider a general electromagnetic environment with no specific restrictions, for
example, an industrial environment, and to take into account all the electromagnetic
phenomena that can occur as well as their maximum amplitudes when deriving
appropriate immunity levels for the system and the equipment. This approach has
been used to determine the levels specified within this part of IEC 61326 leading to
increased immunity levels for some electromagnetic phenomena compared to
immunity levels which are derived without functional safety considerations.
(B) To control the electromagnetic environment, for example, by the application of
particular installation and mitigation practices, in such a way that electromagnetic
phenomena and their amplitudes could occur only to a certain extent. These
phenomena and restricted amplitudes are then taken into account by appropriate
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SIST EN 61326-3-1:2008
61326-3-1 © IEC:2008 – 7 –
immunity levels. These levels are not necessarily higher than those derived without
functional safety considerations because it is ensured by corresponding means that
higher amplitudes are not normally expected. This approach is considered in
IEC 61326-3-2.
Applying approach (A) with regard to a general industrial environment requires appropriate
knowledge of the electromagnetic phenomena and the amplitudes to be expected there. For
this purpose and as it is also requested by IEC 61508, electromagnetic environment data of
IEC 61000-2-5 are to be used. This IEC publication gives information about electromagnetic
phenomena to be expected and describes their amplitudes in terms of compatibility levels.
Since they can be considered as disturbance levels at which an
...
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