IEC 62041:2010

Safety of transformers, reactors, power supply units and combinations thereof - EMC requirements

IEC 62041:2010 applies to transformers, reactors, power supply units and combinations thereof covered by the IEC 61558 series of standards. This standard deals with the electromagnetic compatibility requirements for emission and immunity within the frequency range 0 Hz - 400 GHz. No measurement needs to be performed at frequencies where no requirement is specified. This second edition cancels and replaces the first edition published in 2003. It constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- the frequency range for tests according to IEC 61000-4-3 has been extended above 1 GHz according to technologies used in this frequency area;
- the testing requirements according to IEC 61000-4-11 have been amended significantly;
- the inclusion of a clause on tests in series production;
- the inclusion of a new clause on measurement uncertainly, and
- the inclusion of requirements on DC power ports and telecommunication ports.
It has the status of a product family EMC standard in accordance with IEC Guide 107:2009, Electromagnetic compatibility - Guide to the drafting of electromagnetic compatibility publications. The attention of National Committees is drawn to the fact that equipment manufacturers and testing organizations may need a transitional period following publication of a new, amended or revised IEC publication in which to make products in accordance with the new requirements and to equip themselves for conducting new or revised tests. It is the recommendation of the committee that the content of this publication be adopted for implementation nationally not earlier than 12 months from the date of publication. In the meantime, the previous edition can still be ordered by contacting your local IEC member National Committee or the IEC Central Office.

Sécurité des transformateurs, bobines d'inductance, blocs d'alimentation et des combinaisons de ces éléments - Exigences CEM

La CEI 62041:2010 s'applique aux transformateurs, bobines d'inductance, blocs d'alimentation et aux combinaisons de ces éléments couverts par la série de normes CEI 61558. La présente norme traite des exigences de compatibilité électromagnétique pour l'émission et l'immunité dans la bande de fréquences 0 Hz - 400 GHz. Aucune mesure n'est nécessaire aux fréquences pour lesquelles aucune exigence n'est spécifiée. Cette deuxième édition annule et remplace la première édition parue en 2003. Elle constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- la plage de fréquences pour les essais selon la CEI 61000-4-3 a été étendue à des fréquences au-dessus de 1 GHz d'après les technologies utilisées dans cette zone de fréquence;
- les exigences d'essai d'après la CEI 61000-4-11 ont été amendées de manière significative;
- ajout d'un article sur les essais de production en série;
- ajout d'un nouvel article sur l'incertitude des mesures, et
- l'introduction d'exigences sur les accès de puissance en courant continu et sur les accès de télécommunication.
Elle a le statut d'une norme CEM de famille de produits conformément au Guide CEI 107:2009, Compatibilité électromagnétique - Guide pour la rédaction des publications sur la compatibilité électromagnétique. L'attention des Comités Nationaux est attirée sur le fait que les fabricants d'appareils et les organismes d'essai peuvent avoir besoin d'une période transitoire après la publication d'une nouvelle publication CEI, ou d'une publication amendée ou révisée, pour fabriquer des produits conformes aux nouvelles exigences et pour adapter leurs équipements aux nouveaux essais ou aux essais révisés. Le comité recommande que le contenu de cette publication soit entériné au niveau national non plus tôt que 12 mois de la date de publication. Pendant ce temps, l'édition précédente peut toujours être commandée auprès du Comité National CEI de votre pays ou auprès du bureau Central de la CEI.

General Information

• Status: Published
• Publication Date: 26-Aug-2010
• ICS: 29.180 - Transformers. Reactors
• ICS: 33.100.01 - Electromagnetic compatibility in general
• Technical Committee: TC 96 - Transformers, reactors, power supply units, and combinations thereof
• Drafting Committee: MT 1 - TC 96/MT 1
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 10-Aug-2017

Relations

• Revised: IEC 62041:2017 - Transformers, power supplies, reactors and similar products - EMC requirements
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 62041
®
Edition 2.0 2010-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE




Safety of transformers, reactors, power supply units and combinations thereof –
EMC requirements

Sécurité des transformateurs, bobines d’inductance, blocs d'alimentation et des
combinaisons de ces élements –
Exigences CEM

IEC 62041:2010

---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 62041
®
Edition 2.0 2010-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE




Safety of transformers, reactors, power supply units and combinations thereof –
EMC requirements

Sécurité des transformateurs, bobines d’inductance, blocs d'alimentation et des
combinaisons de ces élements –
Exigences CEM

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
R
CODE PRIX
ICS 29.180, 33.100 ISBN 978-2-88912-157-1
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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– 2 – 62041 © IEC:2010
CONTENTS
FOREWORD.3
1 Scope.5
2 Normative references.5
3 Terms and definitions .6
4 Classification .8
5 Test specifications .8
5.1 Immunity .8
5.1.1 Immunity against disturbances .8
5.1.2 Test levels .10
5.2 Emission .14
5.2.1 Categories .14
5.2.2 Test levels .15
6 Specification of environment .17
Bibliography .18

Figure 1 – Example of ports .7

Table 1 – Electrostatic discharges – Test levels at enclosure.10
Table 2 – Radiated, radio frequency electromagnetic field – Test levels at enclosure .11
Table 3 – Electrical fast transient/burst – Test levels at signal port .11
Table 4 – Electrical fast transient/burst – Test levels at input and output DC power ports .12
Table 5 – Electrical fast transient/burst – Test levels at input and output AC power ports .12
Table 6 – Conducted disturbances, inducted by radio-frequency fields – Test levels at
a
signal ports and input and output at DC and AC power ports.13
Table 7 – Surge – Test levels at signal ports .13
Table 8 – Surge – Test levels at input and output DC power ports.13
Table 9 – Surge – Test levels at input and output AC power ports.14
Table 10 – Voltage dips – Test levels at input AC power ports .14
Table 11 – Voltage interruptions – Test levels at input AC power ports.14
Table 12 – Harmonics and flicker – Test levels at low voltage AC mains ports .15
Table 13 – Conducted radio disturbances – Test levels at signal ports
(telecommunications/network ports) .16
Table 14 – Conducted radio disturbances – Test levels at DC power ports).16
Table 15 – Conducted radio disturbances – Test levels at low voltage AC mains ports .16
Table 16 – Radiated radio disturbances – Test levels at enclosure port.17

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62041 © IEC:2010 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

SAFETY OF TRANSFORMERS, REACTORS,
POWER SUPPLY UNITS AND COMBINATIONS THEREOF –

EMC REQUIREMENTS


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
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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
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
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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 62041 has been prepared by Technical Committee 96: Transformers,
reactors, power supply units and combinations thereof.
This second edition cancels and replaces the first edition published in 2003. It constitutes a
technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
– the frequency range for tests according to IEC 61000-4-3 has been extended above 1 GHz
according to technologies used in this frequency area;
– the testing requirements according to IEC 61000-4-11 have been amended significantly;
– the inclusion of a clause on tests in series production;
– the inclusion of a new clause on measurement uncertainly, and
– the inclusion of requirements on DC power ports and telecommunication ports.

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– 4 – 62041 © IEC:2010
It has the status of a product family EMC standard in accordance with IEC Guide 107:2009,
Electromagnetic compatibility – Guide to the drafting of electromagnetic compatibility
publications.
The text of this standard is based on the following documents:
FDIS Report on voting
96/358/FDIS 96/367/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.
This standard is to be used in conjunction with IEC 61558 series.
In this standard, the following print types are used:
– requirements proper: in roman type;
– test specifications: in italic type;
– explanatory matter: in smaller roman type.
In the text of this publication, the words in bold are defined in Clause 3 of this standard and in
the IEC 61558 series.
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.
NOTE The attention of National Committees is drawn to the fact that equipment manufacturers and testing
organizations may need a transitional period following publication of a new, amended or revised IEC publication in
which to make products in accordance with the new requirements and to equip themselves for conducting new or
revised tests.
It is the recommendation of the committee that the content of this publication be adopted for implementation
nationally not earlier than 12 months from the date of publication.

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62041 © IEC:2010 – 5 –
SAFETY OF TRANSFORMERS, REACTORS,
POWER SUPPLY UNITS AND COMBINATIONS THEREOF –

EMC REQUIREMENTS



1 Scope
This international product family standard applies to transformers, reactors, power supply
units and combinations thereof covered by the IEC 61558 series of standards. This standard
deals with the electromagnetic compatibility requirements for emission and immunity within the
frequency range 0 Hz - 400 GHz. No measurement needs to be performed at frequencies
where no requirement is specified.
Transformers, reactors, power supply units and combinations thereof delivered with or
incorporated in an appliance or equipment should follow the relevant EMC standard applicable
to that appliance or equipment. However, this standard may be used as a guide to test the
transformers, reactors, power supply units and combinations thereof separately before
incorporating them in the appliance or equipment.
This EMC standard covers performance only. Other operations of the transformers, reactors
and power supply units (e.g. simulated faults in the electric circuitry for testing purposes or
functional safety due to the effects of the electromagnetic phenomena, or evaluation of human
being for exposure to electromagnetic fields (EMF)) have not been taken into consideration in
this standard.
NOTE When EUT (Equipment under Test) is used, it covers transformers, reactors, power supply units and
combinations thereof where applicable.
This standard does not apply to:
– uninterruptible power supplies (UPS) covered by IEC 62040 series;
– power supply units covered by IEC 61204-3,
 (i.e. DC-DC converters, DC power and distribution equipment and power supply units for
use in applications covered by IEC 60950-1, IEC 61010-1, IEC 60601-1, IEC 60065 and IEC
62368-1);
– power supplies and converters for use with or in products covered by IEC 61347-1.
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 ≤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

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– 6 – 62041 © IEC:2010
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 measurement
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
IEC 61000-6-4, Electromagnetic compatibility (EMC) – Part 6-4: Generic standards – Emission
standard for industrial environments
IEC 61558 (all parts), Safety of power transformers, power supplies, reactors and similar
products
CISPR 14-1:2005, Electromagnetic compatibility – Requirements for household appliances,
electric tools and similar apparatus – Part 1: Emission
CISPR 16-1-2:2003, Specification for radio disturbance and immunity measuring apparatus and
methods – Part 1-2: Radio disturbance and immunity measuring apparatus – Ancillary
equipment – Conducted disturbances
CISPR 16-2-1:2008, Specification for radio disturbance and immunity measuring apparatus and
methods – Part 2-1: Methods of measurement of disturbances and immunity – Conducted
disturbance measurements
CISPR 16-2-3, Specification for radio disturbance and immunity measuring apparatus and
methods – Part 2-3: Methods of measurement of disturbances and immunity – Radiated
disturbance measurements
CISPR 22, Information technology equipment – Radio disturbance characteristics – Limits and
methods of measurement
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
environment 1
residential, commercial and light-industrial locations, both indoor and outdoor

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62041 © IEC:2010 – 7 –
NOTE 1 Locations which are characterised by being supplied directly from a low voltage from the public mains
network are considered to be residential, commercial or light-industrial.
NOTE 2 The following list, although not comprehensive, gives an indication of location which are included:
– residential properties, e.g. houses, apartments, hotels, etc.;
– retail outlets, e.g. shops, supermarkets, etc.;
– business premises, e.g. offices, banks, etc.;
– areas of public entertainment, e.g. cinemas, public bars, dance halls, restaurants, etc.;
– outdoor locations, e.g. petrol stations, car parks, amusement and sports centres, etc.;
– light-industrial locations, e.g. workshops, laboratories, service centres, etc.
3.2
environment 2
industrial environments, both indoor and outdoor
NOTE Industrial locations are connected to a power network supplied from a high or medium transformer
dedicated to the supply of an installation feeding manufacturing or similar plant, and in addition characterised by
the existence of one or more of the following:
– industrial, scientific and medical (ISM) apparatus (as defined in CISPR 11);
– heavy inductive or capacitive loads are frequently switched;
– currents and associated magnetic fields are high.
3.3
equipment under test
EUT
it refers to transformers, reactors, power supply units and combinations thereof where
applicable
3.4
port
particular interface of the specified EUT with the external electromagnetic environment (see
Figure 1)
NOTE In some cases, different ports may be combined.

Enclosure port
Signal port AC power port
Transformer
(EUT)
DC power port
IEC  1982/10

Figure 1 – Example of ports
3.5
enclosure port
physical boundary of the EUT which electromagnetic fields may radiate through or impinge on
3.6
cable port
port at which a conductor or a cable is connected to the EUT
NOTE Examples are signal and power ports.

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– 8 – 62041 © IEC:2010
3.7
signal port
port at which a conductor or cable intended to carry signals is connected to the EUT
NOTE Examples are analogue inputs, outputs and control lines, data busses, communication networks, etc.
3.8
power port
port at which a conductor or cable carrying the primary electrical power needed for the
operation (functioning) of an EUT is connected
3.9
public mains network
power lines to which all categories of consumers have access to and that are operated by an
electrical power supply and/or distribution organization for the purpose of supplying electrical
energy
3.10
long distance lines
lines connected to a signal port and which inside a building are longer than 30 m, or which
leave the building (including lines of outdoor installations)
3.11
low voltage
voltage having a value below a conventionally adopted limit
[IEC 60050-151:2001, 151-15-03]
4 Classification
EUT are classified according to the incorporation of components and electronic circuits as
follows:
– category 0: EUT with or without passive protection component(s) and without electronic
circuits;
– category 1: EUT with passive components, and without electronic circuits;
– category 2: EUT with electronic circuits.
NOTE 1 Examples of passive protection components are fuses, thermal links, thermal cut-outs, circuit-breakers,
PTC’s, NTC’s and resistors.
NOTE 2 Examples of passive components are capacitors, inductors, diodes, LED’s, relays, VDR’s.
NOTE 3 Examples of electronic circuits are active semiconductors.
5 Test specifications
5.1 Immunity
5.1.1 Immunity against disturbances
EUT shall have sufficient immunity against disturbances from their surroundings.
Category 0 EUT are not sensitive to normal electromagnetic perturbations. Consequently, they
are deemed to fulfil the immunity requirements without testing.
Category 1 EUT shall fulfil the following requirements:

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62041 © IEC:2010 – 9 –
– electrostatic discharge;
NOTE 1 Some passive components such as small capacitors (e.g. Y-type), diodes, LEDs or relays may be
sensitive to electrostatic discharges.
– electrical fast transient/burst;
NOTE 2 Some passive components such as small capacitors (e.g. Y-type), diodes, LEDs, or relays may be
sensitive to electrical fast transients.
– surge.
NOTE 3 Some passive components such as small capacitors (e.g. Y-type), diodes, LED or relays may be
sensitive to surges.
For the requirements on a port-by-port basis, see 5.1.2.2 to 5.1.2.7 inclusive.
Category 2 EUT shall fulfil the following requirements:
– electrostatic discharge;
– electrical fast transient/burst;
– surge;
– conducted disturbances, inducted by radio-frequency fields;
– radiated, radio-frequency electromagnetic fields;
– voltage dips and short interruptions.
The requirements are given in 5.1.2.2 to 5.1.2.7 on a port-by-port basis.
The relevant ports of the EUT shall be subjected to the required test in accordance with the
applicable subclauses. Tests shall be carried out only when the relevant ports exist.
Tests shall be conducted under the no-load condition at the rated voltage and the rated
frequency, unless otherwise specified in the generic EMC standard as indicated in Clause 5. If
EUT is not intended to operate under the no load condition, for some tests, a load may need to
be applied for perturbation. In this case, the specification of the load shall be stated in the test
report.
Tests shall be conducted sequentially. The sequence of testing is optional.
The necessity to conduct some of the tests may be determined in accordance with the
electrical characteristics and the specific application of the particular transformer. In such
cases the rationale for not conducting the tests shall be stated in the test report.
The description of the tests, the test generator, the test methods and the test set-up are
specified in the generic EMC standard for testing in accordance with Clause 5.
The tests are carried out following the manufacturer’s documentation. This includes a
functional description and explanation of performance criteria, during or as a consequence of
the EMC testing. This shall be provided by the manufacturer and included in the test report,
based on the following criteria. In case of no documentation, necessary conductors, the cross
section, the type and the length of the conductors used shall be reported in the test report.
Performance criterion A: The EUT shall continue to operate as intended during and after the
test. No degradation of performance or loss of function is allowed below a performance level
specified by the manufacturer, when the EUT is used as intended. The performance level may
be replaced by a permissible loss of performance. If the minimum performance level or the
permissible performance loss is not specified by the manufacturer, either of these may be
derived from the product description and documentation and what the user may reasonably
expect from the EUT if used as intended.

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– 10 – 62041 © IEC:2010
Performance criterion B: The EUT shall continue to operate as intended after the test. No
degradation of performance or loss of function is allowed below a performance level specified
by the manufacturer, when the EUT is used as intended. The performance level may be
replaced by a permissible loss of performance. During the test, degradation of performance is,
however, allowed. No change of actual operating state or stored data is allowed. If the
minimum performance level or the permissible performance loss is not specified by the
manufacturer, either of these may be derived from the product description and documentation
and what the user may reasonably expect from the EUT if used as intended.
Performance criterion C: Temporary loss of function is allowed, provided the function is self-
recoverable or can be restored by the operation of the controls.
If, as a result of the application of the tests defined in this standard, the transformer becomes
dangerous or unsafe (e.g., by an insulation breakdown), the EUT is deemed to have failed the
tests.
5.1.2 Test levels
5.1.2.1 General
Levels for test stated in this standard correspond to typical condition for environment 1 and 2.
However, if special conditions prevail for the use of the final product, the relevant values in the
basic standard shall be applied and stated in the test report.
5.1.2.2 Electrostatic discharges
These tests are carried out according to IEC 61000-4-2, with test levels as given in Table 1.
Except for metallic parts for which a contact discharge test is
...