IEC 61204-3:2011

Low voltage power supplies, d.c. output - Part 3: Electromagnetic compatibility (EMC)

IEC 61204-3:2011 specifies electromagnetic compatibility (EMC) requirements for power supply units (PSUs) providing d.c. output(s) with or without auxiliary a.c. output(s), operating from a.c. or d.c. source voltages up to 600 V a.c. or 1 000 V d.c. The main changes with respect to the previous edition are listed below:
- Update of the scope to align with IEC 61204-7.
- Update of the normative references to the latest editions.
- Change of the definitions of environments to align with the latest editions of the applicable normative references.
- Revision of the applicability of tests to different power supply technologies.
- Revision of the emission limits and requirements to align with the latest editions of the applicable normative references.
- Revision of the immunity limits and requirements to align with the latest editions of the applicable normative references.
- Clarification of the different classes of PSU.

Alimentations basse tension, sortie continue - Partie 3: Compatibilité électromagnétique (CEM)

La CEI 61204-3:2011 spécifie les exigences de compatibilité électromagnétique (CEM) pour les alimentations générant des tensions continues avec ou sans tension(s) alternative(s) auxiliaire(s), et qui sont elles-mêmes alimentées par des sources alternatives ou continues ne dépassant pas 600 V alternatif ou 1 000 V continu. Les modifications principales par rapport à l'édition précédente sont les suivantes.
- Mise à jour du domaine d'application pour l'aligner avec la CEI 61204-7.
- Mise à jour des références normatives pour mentionner les dernières éditions.
- Modifications des définitions des environnements pour les aligner avec celles des dernières versions des références normatives applicables.
- Révision de l'applicabilité des essais aux différentes technologies d'alimentation.
- Révisions des limites et des exigences relatives aux émissions pour les aligner avec celles des dernières versions des références normatives applicables.
- Révisions des limites et des exigences relatives à l'immunité pour les aligner avec celles des dernières versions des références normatives applicables.
- Clarification des différentes classes d'alimentations.

General Information

• Status: Published
• Publication Date: 21-Jun-2011
• ICS: 29.200 - Rectifiers. Convertors. Stabilized power supply
• ICS: 33.100.01 - Electromagnetic compatibility in general
• Technical Committee: SC 22E - Stabilized power supplies
• Drafting Committee: MT 5 - TC 22/SC 22E/MT 5
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 28-Oct-2016

Relations

• Revised: IEC 61204-3:2016 - Low-voltage switch mode power supplies - Part 3: Electromagnetic compatibility (EMC)
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61204-3
®

Edition 2.0 2011-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE


Low-voltage power supplies, d.c. output –
Part 3: Electromagnetic compatibility (EMC)

Alimentations basse tension, sortie continue –
Partie 3: Compatibilité électromagnétique (CEM)

IEC 61204-3:2011

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---------------------- Page: 2 ----------------------
IEC 61204-3
®

Edition 2.0 2011-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE


Low-voltage power supplies, d.c. output –
Part 3: Electromagnetic compatibility (EMC)

Alimentations basse tension, sortie continue –
Partie 3: Compatibilité électromagnétique (CEM)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX W
ICS 29.200; 33.100 ISBN 978-2-88912-510-4

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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– 2 – 61204-3  IEC:2011
CONTENTS
FOREWORD . 4
1 Scope and object . 6
1.1 Scope . 6
1.1.1 Equipment covered by this standard . 6
1.1.2 Additional requirements . 6
1.1.3 Exclusions . 6
1.1.4 Types of power supply . 7
1.2 Object . 7
2 Normative references. 7
3 Terms and definitions . 9
4 Applicability of tests to different PSU technologies . 13
5 General requirements and test conditions . 13
5.1 General requirements . 13
5.2 Test conditions . 13
6 Emission requirements . 13
6.1 Low frequency phenomena (f ≤ 9 kHz; a.c. input only) . 14
6.1.1 Commutation notches . 14
6.1.2 Current harmonics and interharmonics . 14
6.1.3 Voltage fluctuations and flicker. 14
6.2 High frequency conducted emission . 15
6.2.1 High frequency conducted emission for input power ports . 15
6.2.2 High frequency conducted emission for d.c. output power ports . 15
6.3 High frequency radiated emission . 15
6.3.1 Radiated disturbance measurements . 15
6.3.2 Measurement of disturbance power . 16
6.3.3 Restrictions for the application of interference power measurement . 17
7 Immunity requirements . 17
7.1 Performance criteria . 17
7.2 Basic immunity requirements, high frequency disturbances . 18
7.2.1 Immunity level for residential, commercial, and light industrial
environment. . 18
7.2.2 Immunity level for industrial environment . 21
8 Configurations and combinations of power supplies . 24
8.1 Modular PSUs . 24
8.2 Power supply systems . 24
8.3 Power supply installations . 25
8.4 Distributed power supplies . 25
8.5 Power supplies in parallel or in series . 25
9 Power supply families . 25
10 Statistical aspects . 25
11 Safety aspects . 25
12 Test report . 26
Annex A (normative) Guidelines on the classification of PSUs . 27
Annex B (informative) Commutation notches . 29
Annex C (informative) Calculation and simulation of the input current harmonics . 30

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61204-3  IEC:2011 – 3 –
Annex D (informative) Special considerations for d.c./d.c. converters . 31
Annex E (informative) Critical frequency for high frequency power measurement . 33
Annex F (normative) Guidelines on power supply families . 34
Annex G (informative) Summary of classification of environments and limits . 35
Annex H (normative)  Emission limits . 37
Bibliography . 39

Figure 1 – Test set-up for the measurement of disturbance power . 17

Table 1 – Criteria to prove the performance of a PSU against EM disturbances . 18
Table 2 – Immunity – Enclosure port – Residential, commercial and light industrial
environment . 19
Table 3 – Immunity – Ports for signal lines and control lines . 19
Table 4 – Immunity – DC input and output power ports . 20
Table 5 – Immunity – AC input power ports – Residential, commercial and light
industrial environment . 21
Table 6 – Immunity – Enclosure port – Industrial environment . 22
Table 7 – Immunity – Ports for signal lines and control lines – Industrial environment . 22
Table 8 – Immunity – DC input and output power ports – Industrial environment . 23
Table 9 – Immunity – AC input power ports – Industrial environment . 24
Table A.1 – Classification of power supplies and the relevant EMC standards . 28
Table D.1 – Immunity – DC input power ports – Input category a. 31
Table D.2 – Immunity – DC input power ports – Input category b. 32
Table D.3 – Immunity – Enclosure port – Input categories a and b . 32
Table H.1 – Limits of mains terminal disturbance voltage (a.c. input port) . 37
Table H.2 – Limits of mains terminal disturbance voltage (d.c. input and d.c. output
power port) . 37
Table H.3 – Limits for electromagnetic radiation/interference power disturbance (all field
strength limits refer to quasi-peak measurements) . 38
Table H.4 – Disturbance power limits for the frequency range 30 to 300 MHz . 38

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– 4 – 61204-3  IEC:2011
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

LOW-VOLTAGE POWER SUPPLIES, D.C. OUTPUT –

Part 3: Electromagnetic compatibility (EMC)


FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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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 61204-3 has been prepared by subcommittee 22E: Stabilized power
supplies, of IEC technical committee 22: Power electronic systems and equipment.
IEC 61204-3 has the status of a product family standard.
This second edition cancels and replaces the first edition, published in 2000. It constitutes a
technical revision.
The main changes with respect to the previous edition are listed below.
• Update of the scope to align with IEC 61204-7.
• Update of the normative references to the latest editions.
• Change of the definitions of environments to align with the latest editions of the applicable
normative references.
• Revision of the applicability of tests to different power supply technologies.

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61204-3  IEC:2011 – 5 –
• Revision of the emission limits and requirements to align with the latest editions of the
applicable normative references.
• Revision of the immunity limits and requirements to align with the latest editions of the
applicable normative references.
• Clarification of the different classes of PSU.
The text of this standard is based on the following documents:
FDIS Report on voting
22E/129/FDIS 22E/130/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 61240 series, under the general title Low voltage power supplies, d.c.
output, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until the
stability 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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– 6 – 61204-3  IEC:2011
LOW-VOLTAGE POWER SUPPLIES, D.C. OUTPUT –

Part 3: electromagnetic compatibility (EMC)



1 Scope and object
1.1 Scope
1.1.1 Equipment covered by this standard
This part of IEC 61204 specifies electromagnetic compatibility (EMC) requirements for power
supply units (PSUs) providing d.c. output(s) with or without auxiliary a.c. output(s), operating
from a.c. or d.c. source voltages up to 600 V a.c. or 1 000 V d.c. (see exceptions under 1.1.3.)
NOTE Ringing generators used in telecoms applications are covered by this standard.
This product standard covers both stand alone and component power supply units as defined in
this standard. It covers PSU units for use in or with IT equipment normally covered by
1
and/or IEC 60950-1:2005; PSU units for use in or with measurement,
IEC 60950-1:2001
control and laboratory equipment normally covered by IEC 61010-1; PSU units for use in or
with medical equipment – normally covered by IEC 60601-1; PSU units for use in or with audio,
video and similar electronic apparatus – normally covered by IEC 60065. It also covers d.c.
power and distribution equipment and d.c./d.c. converters.
Where no standard exist, use of this standard for other applications is not precluded.
1.1.2 Additional requirements
Requirements additional to those specified in this standard may be necessary for
– PSUs intended for operation in special environments (for example, extremes of
temperature; excessive dust, moisture or vibration; flammable gases; and corrosive or
explosive atmospheres);
– PSUs intended to be used in vehicles, on board ships or aircraft, or in tropical countries;
– PSUs intended for use where ingress of water is possible.
NOTE Attention is drawn to the fact that authorities in some countries impose additional requirements for health,
environmental and similar reasons.
1.1.3 Exclusions
This standard does not apply to
– motor-generator sets;
– uninterruptible power supplies (UPS) to IEC 62040-1-1;
– PSUs covered by IEC 61558-1 (i.e. power supply units incorporating safety isolating
transformers providing SELV or PELV output(s) in accordance with IEC 60364-4-41 and
PSUs for use with household and other consumer products, except those covered by
IEC 60065 and IEC 60950-1:2001 and/or IEC 60950-1:2005;
– transformers covered by IEC 61558-1;
– step-down converters covered by IEC 60146-1-1;
– PSUs and converters for use with or in products covered by IEC 61347-2-2.
___________
1
 This publication has been withdrawn and replaced by the second edition issued in 2005.

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61204-3  IEC:2011 – 7 –
1.1.4 Types of power supply
Two types of power supplies are covered by this standard:
a) stand alone (or end-product) power supplies
Power supplies intended for free-standing operation (individual apparatus).
This part of IEC 61204 is applicable to PSUs developed as a unit with a direct function and sold
on the market as a stand-alone unit.
b) component power supplies
These can be divided into two categories:
1) component power supplies considered as equivalent to stand alone power
supplies (apparatus).
This part of IEC 61204 is applicable to this category of component PSUs. These PSUs
are considered to be apparatus with respect to their EMC requirements, for example
those PSUs intended for use in installations or sold to the general public, cases where
no further EMC tests are anticipated. This does not include PSUs sold as spares for
repair which have been tested as part of an overall equipment.
2) component power supplies intended for a professional installer
This part of IEC 61204 is applicable to this category of power supplies only as an aid to
specify relevant EMC requirements in order that various end-product standards may be met.
These are component power supplies that are intended for incorporation into a final
product by a professional installer. These products may be sold to a professional
installer or placed on the market for specialized distribution and use. In neither case do
they perform in themselves a direct function for the user of an end-product. Further
EMC tests of the assembly are assumed.
NOTE After incorporation into a final product, the emission values can be altered (e.g. because of modified earth
connections).
1.2 Object
The object of this part of IEC 61204 is to define EMC limits and test methods for PSUs. It
includes limits for electromagnetic emissions which may cause interference to other electronic
equipment (e.g. radio receivers, measuring and computer devices), as well as electromagnetic
immunity limits for continuous and transient conducted and radiated disturbances including
electrostatic discharges.
This part of IEC 61204 defines the minimum electromagnetic compatibility requirements for
PSUs.
To comply with this part of IEC 61204, no additional EMC tests are required or necessary
beyond those stated here.
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 60050-121, International Electrotechnical Vocabulary (IEV) – Part 121: Electromagnetism
IEC 60050-131, International Electrotechnical Vocabulary (IEV) – Part 131: Circuit theory

---------------------- Page: 9 ----------------------
– 8 – 61204-3  IEC:2011
IEC 60050-151, International Electrotechnical Vocabulary (IEV) – Part 151: Electrical and
magnetic devices
IEC 60050-161, International Electrotechnical Vocabulary (IEV) – Part 161: Electromagnetic
compatibility
IEC 60050-551, International Electrotechnical Vocabulary (IEV) – Part 551: Power electronics
IEC 60065, Audio, video and similar electronic apparatus – Safety requirements
IEC 60146-1-1, Semiconductor converters – General requirements and line commutated
converters – Part 1-1: Specifications of basic requirements
IEC 60364-4-41, Low-voltage electrical installations – Part 4-41: Protection for safety –
Protection against electric shock
IEC 60601-1, Medical electrical equipment – Part 1: General requirements for basic safety and
essential performance
IEC 60950-1:2005, Information technology equipment – Safety – Part 1: General requirements
IEC 61000-3-2, Electromagnetic compatibility (EMC) – Part 3-2: Limits – Limits for harmonic
current emissions (equipment input current ≤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 61000-3-11 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 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 61000-4-2, 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 61000-4-11, Electromagnetic compatibility (EMC) – Part 4-11: Testing and measuring
techniques – Voltage dips, short interruptions and voltage variations immunity tests
IEC 61000-6-3, Electromagnetic compatibility (EMC) – Part 6-3: Generic standards – Emission
standard for residential, commercial and light-industrial environments

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61204-3  IEC:2011 – 9 –
IEC 61000-6-4, Electromagnetic compatibility (EMC) – Part 6-4: Generic standards – Emission
standard for industrial environments
IEC 61010-1, Safety requirements for electrical equipment for measurement, control, and
laboratory use – Part 1: General requirements
2
IEC 61204, Low-voltage power supply devices, d.c. output – Performance characteristics
IEC 61347-2-2, Lamp controlgear – Part 2-2: Particular requirements for d.c. or a.c. supplied
electronic step-down converters for filament lamps
IEC 61558-1, Safety of power transformers, power supplies, reactors and similar products –
Part 1: General requirements and tests
CISPR 11, Industrial, scientific and medical equipment – Radio-frequency disturbance
characteristics – Limits and methods of measurement
CISPR 14-1, Electromagnetic compatibility – Requirements for household appliances, electric
tools and similar apparatus – Part 1: Emission
CISPR 16-1 (all parts), Specification for radio disturbance and immunity measuring apparatus
and methods – Part 1: Radio disturbance and immunity measuring apparatus
CISPR 16-1-2:2004, Specification for radio disturbance and immunity measuring apparatus and
methods – Part 1-2: Radio disturbance and immunity measuring apparatus – Ancillary
equipment – Conducted disturbances
CISPR 16-1-3, Specification for radio disturbance and immunity measuring apparatus and
methods – Part 1-3: Radio disturbance and immunity measuring apparatus – Ancillary
equipment – Disturbance power
CISPR 16-2-1:2008, Specification for radio disturbance and immunity measuring apparatus and
methods – Part 2-1: Methods of measurement of disturbances and immunity – Conducted
disturbance measurements
CISPR 16-2-2, Specification for radio disturbance and immunity measuring apparatus and
methods – Part 2-2: Methods of measurement of disturbances and immunity – Measurement of
disturbance power
CISPR 16-2-3, Specification for radio disturbance and immunity measuring apparatus and
methods – Part 2-3: Methods of measurement of disturbances and immunity – Radiated
d
...