IEC 62003:2020

IEC 62003 ®
Edition 2.0 2020-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colourcolour
insinsiidede
Nuclear power plants – Instrumention, control and electrical power systems –
Requirements for electromagnetic compatibility testing

Centrales nucléaires de puissance – Systèmes d'instrumentation, de contrôle-
commande et d'alimentation électrique – Exigences relatives aux essais de
compatibilité électromagnétique

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IEC 62003 ®
Edition 2.0 2020-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colourcolour
insinsiidede
Nuclear power plants – Instrumention, control and electrical power systems –

Requirements for electromagnetic compatibility testing

Centrales nucléaires de puissance – Systèmes d'instrumentation, de contrôle-

commande et d'alimentation électrique – Exigences relatives aux essais de

compatibilité électromagnétique

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 27.120.20 ISBN 978-2-8322-7844-4

– 2 – IEC 62003:2020 © IEC 2020
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 10
4 Abbreviated terms . 11
5 EMC test requirements . 12
6 Electromagnetic environment . 13
7 Immunity testing . 15
7.1 General . 15
7.2 Applicability . 15
7.3 Measurement uncertainty . 15
7.4 Test requirements . 16
7.5 Immunity test considerations for wireless technology . 19
8 Emissions testing . 20
9 Test considerations . 21
10 Test report documentation . 22
Annex A (normative) Functional quality criteria of nuclear I&C and electrical EUT for
immunity . 23
Annex B (informative) Quality characteristics defining the classification of
electromagnetic environment severity in the locations where nuclear I&C and electrical
power equipment is to be installed . 24
Annex C (informative) Explanation for the degrees of severity of tests for EMC
immunity . 27
C.1 General . 27
C.2 Immunity to electrostatic discharges according to IEC 61000-4-2 . 27
C.3 Immunity to radio-frequency electromagnetic field according to IEC 61000-4-
3 (or IEC 61000-4-20) . 27
C.4 Immunity to electrical fast transient/burst according to IEC 61000-4-4 . 28
C.5 Immunity to surge disturbances of large energy according to IEC 61000-4-5 . 28
C.6 Immunity to conducted disturbances induced by radiofrequency fields
according to IEC 61000-4-6 . 28
C.7 Immunity to power frequency magnetic field according to IEC 61000-4-8 . 28
C.8 Immunity to pulse magnetic field according to IEC 61000-4-9 . 29
C.9 Immunity to a damped oscillatory magnetic field according to
IEC 61000-4-10 . 29
C.10 Immunity to voltage dips and short voltage interruptions according to
IEC 61000-4-11, IEC 61000-4-29, and IEC 61000-4-34 . 29
C.11 Immunity to a ring wave surge according to IEC 61000-4-12 . 29
C.12 Immunity to a distortion of harmonics and interharmonics including mains
signalling at AC power port according to IEC 61000-4-13 . 30
C.13 Immunity to fluctuations of power supply voltage according to IEC 61000-4-
14 . 30
C.14 Immunity to conducted common mode disturbances in the frequency range
of 0 Hz to 150 kHz according to IEC 61000-4-16 . 30
C.15 Immunity to ripple on DC input power ports according to IEC 61000-4-17 . 30
C.16 Immunity to oscillatory damped disturbances according to IEC 61000-4-18 . 31

C.17 Immunity to variation of power frequency according to IEC 61000-4-28 . 31
Annex D (informative) Guidance for tests and evaluation of the electromagnetic
environment in a nuclear power plant . 32
Annex E (informative) Guidance for tests and evaluation of conformance with the
requirements for emissions and immunity of operating nuclear I&C and electrical
equipment . 33
Annex F (informative) Example form of test plan for nuclear I&C and electrical

equipment tests for emissions and immunity . 34
Annex G (informative) Example form of test report for nuclear I&C and electrical
equipment tests for emissions and immunity . 35
Annex H (informative) EMC testing of power electronics and adjustable speed drives . 36
Bibliography . 38

Figure 1 – Examples of ports . 11
Figure 2 – Example of the situation of a power station . 14

Table 1 – Description of applicable EMC immunity and emissions tests for nuclear I&C
and electrical equipment important to safety . 13
Table 2 – Immunity specifications – Enclosure port . 16
Table 3 – Immunity specifications – Signal and control ports. 17
Table 4 – Immunity specifications – Low voltage AC input and output power ports . 18
Table 5 – Immunity specifications – Low voltage DC input and output power ports . 19
Table 6 – Limits for radiated emissions from nuclear I&C and electrical equipment . 20
Table 7 – Limits for conducted emissions from nuclear I&C and electrical equipment . 21
Table A.1 – Functional quality criteria of nuclear I&C and electrical EUT for immunity . 23
Table B.1 – Quality characteristics defining the classification of electromagnetic
environment severity in the locations where nuclear I&C and electrical equipment is to
be installed . 24
Table H.1 – IEC 61800-3 conducted emissions limits for category C3 power
distribution system in the second (typical industrial) environment . 36
Table H.2 – IEC 61800-3 radiated emissions limits for category C3 power distribution

system in the second (typical industrial) environment . 37

– 4 – IEC 62003:2020 © IEC 2020
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
NUCLEAR POWER PLANTS – INSTRUMENTION, CONTROL
AND ELECTRICAL POWER SYSTEMS – REQUIREMENTS
FOR ELECTROMAGNETIC COMPATIBILITY TESTING

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,
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with the International Organization for Standardization (ISO) in accordance with conditions determined by
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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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6) All users should ensure that they have the latest edition of this publication.
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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 62003 has been prepared by subcommittee 45A: Instrumentation,
control and electrical power systems of nuclear facilities, of IEC technical committee 45:
Nuclear instrumentation.
This second edition cancels and replaces the first edition published in 2009. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) title modified.
b) expand the scope to encompass Electromagnetic Magnetic Compatibility (EMC)
considerations for electrical equipment.
c) provide guidance for addressing the use of wireless technology.
d) enhance the description of the electromagnetic environment to provide clarification when
selecting custom test levels or for test exemptions.

e) include example information to be contained within an EMC test plan.
f) provide guidance for characterization of the electromagnetic environment at the point of
installation within a nuclear facility.
The text of this International Standard is based on the following documents:
FDIS Report on voting
45A/1299/FDIS 45A/1303/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.
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 document using a
colour printer.
– 6 – IEC 62003:2020 © IEC 2020
INTRODUCTION
a) Technical background, main issues and organization of the standard
This International Standard was prepared and based, to a very strong extent, on the
current application of the IEC 61000 series for commercial equipment qualification for
electromagnetic compatibility (EMC).
It is intended that this standard be used by operators of nuclear power plants (utilities),
systems evaluators and by licensors.
b) Situation of the current standard in the structure of the SC 45A standard series
IEC 62003 is the third level SC 45A document dealing with the issue of qualification for
electromagnetic compatibility (EMC) applicable to Instrumentation and Control (I&C) and
electrical systems important to safety in nuclear facilities.
For more details on the structure of the SC 45A standard series see item d) of this
introduction.
c) Recommendation and limitation regarding the application of this standard
It is important to note that this standard establishes no additional functional requirements
for safety systems but clarifies the criteria to be applied for qualification to
Electromagnetic and Radio Frequency Interference (EMI/RFI) from the commercial
standards.
Aspects for which special requirements and recommendations have been produced, are:
1) IEC 61000 series with specific qualifications for nuclear applications around the world;
2) regulatory interpretations for requirements on level of qualification necessary and
types of recommended testing to address all potential environmental stressors, related
to this type of qualification;
3) IEC 61000-6-2, Electromagnetic compatibility (EMC) – Part 6-2: Generic Standards –
Immunity for industrial environments, addresses requirements for all industrial
environments while this standard addresses environments in nuclear facilities
specifically.
This standard is intended to align with the guidance contained within IEC 61000-6-5 and
IEC 61000-6-7 where possible. Additional considerations from these standards can be
used in conjunction with this standard when addressing the EMC of electrical and I&C
equipment in nuclear facilities.
d) Description of the structure of the IEC SC45A standard series and relationships with
other IEC documents and other bodies documents (IAEA, ISO)
The top-level documents of the IEC SC45A standard series are IEC 61513 and IEC 63046.
IEC 61513 provides general requirements for I&C systems and equipment that are used to
perform functions important to safety in NPPs. IEC 63046 provides general requirements
for electrical power systems of NPPs; it covers power supply systems including the supply
systems of the I&C systems. IEC 61513 and IEC 63046 are to be considered in
conjunction and at the same level. IEC 61513 and IEC 63046 structure the IEC SC45A
standard series and shape a complete framework establishing general requirements for
instrumentation, control and electrical systems for nuclear power plants.
IEC 61513 and IEC 63046 refer directly to other IEC SC45A standards for general topics
related to categorization of functions and classification of systems, qualification,
separation, defence against common cause failure, control room design, electromagnetic
compatibility, cybersecurity, software and hardware aspects for programmable digital
systems, coordination of safety and security requirements and management of ageing.
The standards referenced directly at this second level should be considered together with
IEC 61513 and IEC 63046 as a consistent document set.
At a third level, IEC SC45A standards not directly referenced by IEC 61513 or by
IEC 63046 are standards related to specific equipment, technical methods, or specific
activities. Usually these documents, which make reference to second-level documents for
general topics, can be used on their own.

A fourth level extending the IEC SC45 standard series, corresponds to the Technical
Reports which are not normative.
The IEC SC45A standards series consistently implements and details the safety and
security principles and basic aspects provided in the relevant IAEA safety standards and
in the relevant documents of the IAEA nuclear security series (NSS). In particular this
includes the IAEA requirements SSR-2/1, establishing safety requirements related to the
design of nuclear power plants (NPPs), the IAEA safety guide SSG-30 dealing with the
safety classification of structures, systems and components in NPPs, the IAEA safety
guide SSG-39 dealing with the design of instrumentation and control systems for NPPs,
the IAEA safety guide SSG-34 dealing with the design of electrical power systems for
NPPs and the implementing guide NSS17 for computer security at nuclear facilities. The
safety and security terminology and definitions used by SC45A standards are consistent
with those used by the IAEA.
IEC 61513 and IEC 63046 have adopted a presentation format similar to the basic safety
publication IEC 61508 with an overall life-cycle framework and a system life-cycle
framework. Regarding nuclear safety, IEC 61513 and IEC 63046 provide the interpretation
of the general requirements of IEC 61508-1, IEC 61508-2 and IEC 61508-4, for the
nuclear application sector. In this framework IEC 60880, IEC 62138 and IEC 62566
correspond to IEC 61508-3 for the nuclear application sector. IEC 61513 and IEC 63046
refer to ISO as well as to IAEA GS-R part 2 and IAEA GS-G-3.1 and IAEA GS-G-3.5 for
topics related to quality assurance (QA). At level 2, regarding nuclear security, IEC 62645
is the entry document for the IEC/SC45A security standards. It builds upon the valid high
level principles and main concepts of the generic security standards, in particular ISO/IEC
27001 and ISO/IEC 27002; it adapts them and completes them to fit the nuclear context
and coordinates with the IEC 62443 series. At level 2, IEC 60964 is the entry document for
the IEC/SC45A control rooms standards and IEC 62342 is the entry document for the
ageing management standards.
NOTE 1 It is assumed that for the design of I&C systems in NPPs that implement conventional safety
functions (e.g. to address worker safety, asset protection, chemical hazards, process energy hazards)
international or national standards would be applied.
NOTE 2 IEC/SC45A domain was extended in 2013 to cover electrical systems. In 2014 and 2015 discussions
were held in IEC/SC45A to decide how and where general requirements for the design of electrical systems
were to be considered. IEC/SC45A experts recommended that an independent standard be developed at the
same level as IEC 61513 to establish general requirements for electrical systems. Project IEC 63046 is now
launched to cover this objective. When IEC 63046 is published this NOTE 2 of the introduction of IEC/SC45A
standards will be suppressed.
– 8 – IEC 62003:2020 © IEC 2020
NUCLEAR POWER PLANTS – INSTRUMENTION, CONTROL
AND ELECTRICAL POWER SYSTEMS – REQUIREMENTS
FOR ELECTROMAGNETIC COMPATIBILITY TESTING

1 Scope
This document establishes requirements for electromagnetic compatibility testing of
instrumentation, control, and electrical equipment supplied for use in systems important to
safety at nuclear power plants and other nuclear facilities. The document lists the applicable
IEC standards (principally the IEC 61000 series) which define the general test methods, and
provides the necessary application-specific parameters and criteria to ensure that nuclear
safety requirements are met.
The normative part of this document is limited to the testing of equipment prior to installation
in a nuclear power plant to demonstrate immunity to electromagnetic disturbances and to
demonstrate that the equipment does not generate excessive emissions. Testing for the
generation of excessive emissions is also applicable to non-safety equipment. This document
includes informative annexes which provide additional guidance and describes approaches to
maintaining electromagnetic compatibility for installed equipment. The intent of this document
is to provide guidance for conducting the electromagnetic compatibility (EMC) qualification
testing of the equipment and does not provide guidance for the installation of the equipment
to prevent electromagnetic and radio frequency interference (EMI/RFI). However, the
configuration of the equipment under test during EMC qualification testing is representative of
the intended installation in a nuclear facility.
Protection against a high altitude electromagnetic pulse (HEMP) and intentional
electromagnetic interference (IEMI) are outside of the scope of this document, but information
can be found in IEC 61000-4-23, IEC 61000-4-24, and IEC 61000-4-25 (HEMP) and
IEC 61000-4-36 (IEMI) to address these phenomena.
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/IEEE 60780-323, Nuclear facilities – Electrical equipment important to safety –
Qualification
IEC TR 61000-1-6, Electromagnetic compatibility (EMC) – Part 1-6: General – Guide to the
assessment of measurement uncertainty
IEC TR 61000-2-5, Electromagnetic compatibility (EMC) – Part 2-5: Environment –
Description and classification of electromagnetic environments
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 – Impulse magnetic field immunity test
IEC 61000-4-10, Electromagnetic compatibility (EMC) – Part 4-10: Testing and measurement
techniques – Damped oscillatory magnetic field immunity test
IEC 61000-4-11, Electromagnetic compatibility (EMC) – Part 4-11: Testing and measurement
techniques – Voltage dips, short interruptions and voltage variations immunity tests
IEC 61000-4-12, Electromagnetic compatibility (EMC) – Part 4-12: Testing and measurement
techniques – Ring wave immunity test
IEC 61000-4-13, Electromagnetic compatibility (EMC) – Part 4-13: Testing and measurements
techniques – Harmonics and interharmonics including mains signalling at a.c. power port, low
frequency immunity tests
IEC 61000-4-14, Electromagnetic compatibility (EMC) – Part 4-14: Testing and measurement
techniques – Voltage fluctuation immunity test
IEC 61000-4-16, Electromagnetic compatibility (EMC) – Part 4-16: Testing and measurement
techniques – Test for immunity to conducted, common mode disturbances in the frequency
range 0 Hz to 150 kHz
IEC 61000-4-17, Electromagnetic compatibility (EMC) – Part 4-17: Testing and measurement
techniques – Ripple on d.c. input power port immunity test
IEC 61000-4-18, Electromagnetic compatibility (EMC) – Part 4-18: Testing and measurement
techniques – Damped oscillatory wave immunity test
IEC 61000-4-20, Electromagnetic compatibility (EMC) – Part 4-20: Testing and measurement
techniques – Emission and immunity testing in transverse electromagnetic (TEM) waveguides
IEC 61000-4-28, Electromagnetic compatibility (EMC) – Part 4-28: Testing and measurement
techniques – Variation of power frequency, immunity test
IEC 61000-4-29, Electromagnetic compatibility (EMC) – Part 4-29: Testing and measurement
techniques – Voltage dips, short interruptions and voltage variations on d.c. input power port
immunity tests
IEC 61000-4-34, Electromagnetic compatibility (EMC) – Part 4-34: Testing and measurement
techniques – Voltage dips, short interruptions and voltage variations immunity tests for

equipment with input current more than 16 A per phase
IEC 61000-6-4, Electromagnetic compatibility (EMC) – Part 6-4: Generic standards –
Emission standard for industrial environments

– 10 – IEC 62003:2020 © IEC 2020
IEC 61000-6-5, Electromagnetic compatibility (EMC) – Part 6-5: Generic standards –
Immunity for equipment used in power station and substation environment
IEC 61000-6-7, Electromagnetic compatibility (EMC) – Part 6-7: Generic standards –
Immunity requirements for equipment intended to perform functions in a safety-related system
(functional safety) in industrial locations
IEC 61226, Nuclear power plants – Instrumentation and control important to safety –
Classification of instrumentation and control functions
3 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
acceptance criteria
specified bounds on the value of a functional indicator or condition indicator used to assess
the ability of a structure, system or component to perform its design function
[SOURCE: IAEA Safety Glossary, edition 2016]
3.2
electromagnetic compatibility
EMC
ability of an equipment or system to function satisfactorily in its electromagnetic environment
without introducing intolerable electromagnetic disturbances to anything in that environment
[SOURCE: IEC 60050-161:1990, 161-01-07]
3.3
electromagnetic environment
totality of electromagnetic phenomena existing at a given location
[SOURCE: IEC 60050-161:1990, 161-01-01]
3.4
immunity
ability of a device, equipment or system to perform without degradation in the presence of an
electromagnetic disturbance
[SOURCE: IEC 60050-161:1990, 161-01-20]
3.5
electrostatic discharge
transfer of electric charge between bodies of different electrostatic potential in proximity or
through direct contact
[SOURCE: IEC 60050-161:1990, 161-01-22]

3.6
equipment under test
EUT
equipment under test can be a single unit or multiple units interconnected by cables, data
links, etc.
[SOURCE: IEC 61000-4-25:2001, 3.10]
3.7
port
particular interface of an equipment, which couples this equipment with the external
electromagnetic environment and through which the equipment is influenced by the
environment (see Figure 1)
[SOURCE: IEC 60050-161:1990, 161-01-27]

Figure 1 – Examples of ports
3.8
radiofrequency
RF
frequency of the electromagnetic spectrum that is between the audio frequency portion and
the infrared portion
[SOURCE: IEC 61000-4-23:2000, 3.37]
3.9
transient
pertaining to or designating a phenomenon or a quantity which varies between two
consecutive steady states during a time interval that is short when compared with the time-
scale of interest
[SOURCE: IEC 60050-161:1990, 161-02-01]
4 Abbreviated terms
AC Alternative current
DC Direct current
EFT Electrical fast transient
EMI/RFI Electromagnetic and radiofrequency interference
EMC Electromagnetic compatibility
ESD Electrostatic discharge
EUT Equipment under test
HEMP High altitude electromagnetic pulse

– 12 – IEC 62003:2020 © IEC 2020
HV High voltage
IEMI Intentional electromagnetic interference
I/O Input/output
I&C Instrumentation and control
LISN Line impedance stabilization network
LV Low voltage
MV Medium voltage
UPS Uninterruptible power system
5 EMC test requirements
Nuclear instrumentation, control, and electrical equipment important to the safety of a nuclear
plant (as defined in the IEC/IEEE 60780-323 standard) shall satisfy the requirements for
emissions generated by the equipment and immunity to electromagnetic interference as
documented in this document. Controlling the emissions from all types of equipment
(important to safety and non-safety equipment) is necessary to ensure that the
electromagnetic environment is bounded by the test levels recommended in this standard.
Table 1 contains a list and description of the EMC immunity and emissions tests applicable to
nuclear I&C and electrical equipment important to safety to be installed into a nuclear facility.
These tests address the main types of electromagnetic disturbances found in a typical nuclear
power plant environment and not all types of tests may be applicable for a particular piece of
equipment or installation. Adequate technical justification for the elimination of particular tests
should be provided in the EMC purchase specification, test plan, and/or test report. Further
guidance regarding the applicability of the various tests, test levels, and frequency ranges can
be found in IEC 61000-6-5 (immunity for power station equipment) and IEC 61000-6-7
(immunity for safety-related system in industrial locations).
In the case of existing and installed equipment inside nuclear power plants, the requirements
defined in this document may be aligned according to the state-of-the-art for EMC
qualification testing valid during the time of installation. For such equipment, operational
experience may be taken into account.
The guidance in this document was developed for I&C equipment but may also be applied to
electrical equipment. However, because of the unique nature of electrical (power) equipment,
some additional considerations might be required. An example of these considerations is
provided in Annex H.
When the electromagnetic environment in a plant is unknown, it may become necessary to
obtain emissions data at the point of the installation, using guidance in Annex D. Guidance in
Annex E can be used to determine the EMC performance of equipment already installed in a
nuclear power plant facility.
Table 1 – Description of applicable EMC immunity and emissions tests
for nuclear I&C and electrical equipment important to safety
Test standard EMC test description
EMC immunity tests
IEC 61000-4-2 Electrostatic Discharge (ESD)
IEC 61000-4-3/IEC 61000-4-20 High frequency radiated
IEC 61000-4-4 Electrical Fast Transient (EFT)
IEC 61000-4-5 Surge (combination wave)
IEC 61000-4-6 High frequency conducted
IEC 61000-4-8 Magnetic field – Power frequency
IEC 61000-4-9 Pulse magnetic field
IEC 61000-4-10 Damped oscillatory magnetic field
IEC 61000-4-11 Voltage dips, interrupts (AC ≤ 16 A)
IEC 61000-4-12 Surge (ring wave)
IEC 61000-4-13 Power frequency harmonics
IEC 61000-4-14 Voltage fluctuations
IEC 61000-4-16 Low frequency conducted
IEC 61000-4-17 Ripple on d.c. power supply
IEC 61000-4-18 Surge (damped oscillatory wave)
IEC 61000-4-28 Power frequency variation
IEC 61000-4-29 Voltage dips, interrupts (DC)
IEC 61000-4-34 Voltage dips, interrupts (AC ˃ 16 A)
EMC emissions tests
IEC 61000-6-4 High frequency conducted
IEC 61000-6-4 High frequency radiated

6 Electromagnetic environment
The typical locations covered by this document are found within nuclear power plants and
similar nuclear facilities. The locations generally follow a typical power plant installation
shown in Figure 2 based on IEC 61000-6-5. In Figure 2, the solid lines do not represent
physical boundaries between the areas where the equipment is installed, but indicate generic
boundaries between electromagnetic environments. A majority of the I&C and electrical
equipment covered under this document will be located in environments defined as interface
type 2 meaning that it will not directly interface with the electrical process (medium and high
voltage power distribution). For I&C and electrical equipment that does directly interface with
the electrical process, the typical environment would be defined as interface type 3 in
Figure 2. Therefore, the test levels specified in this document will be based upon the
assumption that the equipment to be tested will be installed in these interface type 2 or
interface type 3 areas of the plant.
It should be noted that the electromagnetic environment within these interface type 2 and 3
(and other) areas can vary significantly depending on the specific plant location and
installation/design practices. If the equipment will be installed in a more or less severe
environment (or if the country specific standards are different), then the test levels can
deviate from those presented in this document as long as an appropriately documented
justification is provided. Guidance is provided in Annex B to aid in determining specific test
levels and providing the proper justification based upon the intended installation location.
Further information on the interface types in typical power stations can be found in

– 14 – IEC 62003:2020 © IEC 2020
IEC 61000-6-5. Additional information for classification of the electromagnetic environment
can be found in IEC TR 61000-2-5.

Key interface types
1 Inside protected area
2 Inside interface and/or control room and/or process area not involved in the electrical process
3 Inside or from process area involved in the electrical process
4 Connections from outside (HV area and external telecommunication)
NOTE The process area involved in the electrical process can contain for example MV/HV or high power
equipment such as generators, large drives, converters, MV switchgear.
The process area not involved in the electrical process can contain for example turbines, boiler, pollution
monitoring, fuel handling, LV switchgear.
The control room area can contain for example control systems, industrial computers, fire fighting systems, UPS,
etc.
The protected area can contain for example special sensitive equipment such as routers, computers, etc.
The interface area can contain for example equipment and systems connected to the outside with measures such
as surge protection and bonding of cable shields. This is the area where signals from the outside are collected,
converted and distributed.
The outside area can contain additional process equipment, signalling, etc.
The high voltage area can contain for example circuit breakers, bus bars, disconnectors, metering, etc.
Figure 2 – Example of the situation of a power station

7 Immunity testing
7.1 General
Nuclear I&C and electrical equipment important to the safety of a nuclear plant shall satisfy
the requirements for immunity to electromagnetic interference documented in Table 1 of this
document. If an item is deemed to be inappropriate for the EUT, exemption shall be justified
by consideration of operating conditions or other relevant factors and documented in the EMC
test plan. The degrees of test severity and acceptance criteria that are established for nuclear
I&C and electrical equipment emissions and immunity testing shall be documented in the EMC
test plan and test report.
Immunity levels for nuclear I&C and electrical equipment have been established in
accordance with Table 2 through Table 5 for a typical installation in a nuclear facility. For
each item of nuclear I&C and electrical equipment, if one or more of the immunity levels from
Table 2 through Table 5 are determined to be inadequate (too restrictive or non-conservat
...