IEC 61000-2-4:2024
(Main)Electromagnetic compatibility (EMC) - Part 2-4: Environment - Compatibility levels in power distribution systems in industrial locations for low-frequency conducted disturbances
Electromagnetic compatibility (EMC) - Part 2-4: Environment - Compatibility levels in power distribution systems in industrial locations for low-frequency conducted disturbances
IEC 61000-2-4:2024 is related to conducted disturbances in the frequency range from 0 kHz to 150 kHz. It gives compatibility levels in differential mode (L-L and L-N) for industrial locations, with a nominal voltage up to 35 kV and a nominal frequency of 50 Hz or 60 Hz.
NOTE 1 Industrial locations are defined in 3.1.8.
Power distribution systems on ships, aircraft, offshore platforms and railways are not included.
NOTE 2 See also Annex E. The compatibility levels specified in this document apply at the in-plant point of coupling (IPC). The level of the low-frequency disturbances at the terminals of equipment receiving its supply from the IPC is generally assumed to be similar to the disturbance level at the IPC itself. However, in some situations this is not the case, particularly when a long feeder is dedicated to the supply of a particular load, or when a disturbance is generated or amplified within the installation of which the equipment forms a part.
Compatibility levels are specified for the types of low-frequency electromagnetic disturbances expected at any in-plant point of coupling (IPC) within industrial locations, for guidance in the definition of:
a) limits for disturbance emissions in industrial power distribution systems (including the planning levels defined in 3.1.5);
NOTE 3 A very wide range of conditions is possible in the electromagnetic environments of industrial networks. These are approximated in this document by the three classes described in Clause 4. However, it is the responsibility of the operator of such a network to take account of the particular electromagnetic and economic conditions, including equipment characteristics, in setting the above-mentioned limits.
b) immunity levels for the equipment within these systems.
The disturbance phenomena considered are:
- voltage deviations;
- voltage dips and short interruptions;
- voltage imbalance;
- power-frequency variations;
- harmonics up to order 40;
- interharmonics up to the 40th harmonic;
- voltage components above the 40th harmonic up to 150 kHz;
- DC component;
- transient overvoltages.
The compatibility levels are given for different classes of environment determined by the characteristics of the supply network and loads.
NOTE 4 Compatibility levels at the point of common coupling (PCC) on public networks are specified in IEC 61000‑2‑2 for low-voltage networks and IEC 61000‑2‑12 for medium-voltage networks. IEC TR 61000‑3‑6 and IEC TR 61000‑3‑7 describe the approach of power distribution system operators to the limitation of emissions from installations and large loads.
This third edition cancels and replaces the second edition published in 2002. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) introduction of new classes 2a, 2b and 2L (former class 2);
b) modification of existing compatibility levels for class 3;
c) addition of compatibility levels in the frequency range 2 kHz to 150 kHz;
d) addition of compatibility levels using a new quantity: partial weighted harmonic distortion (PWHD).
Compatibilité électromagnétique (CEM) - Partie 2-4: Environnement - Niveaux de compatibilité dans les réseaux de distribution d'électricité sur des sites industriels pour les perturbations conduites à basse fréquence
L'IEC 61000-2-4:2024 traite des perturbations conduites dans la plage de fréquences de 0 kHz à 150 kHz. Elle fournit les niveaux de compatibilité en mode différentiel (L-L et L-N) pour les sites industriels, avec une tension nominale jusqu'à 35 kV et une fréquence nominale de 50 Hz ou 60 Hz.
NOTE 1 Les sites industriels sont définis au 3.1.8.
Les réseaux de distribution d'électricité sur les navires, les aéronefs, les plateformes en mer et les réseaux ferroviaires sont exclus.
NOTE 2 Voir aussi l'Annexe E. Les niveaux de compatibilité spécifiés dans le présent document s'appliquent au point de couplage interne à l'installation (IPC). Le niveau des perturbations à basse fréquence aux bornes des équipements alimentés par l'IPC est par hypothèse généralement similaire au niveau de perturbation à l'emplacement de l'IPC. Toutefois, cela n'est pas le cas dans certaines situations, particulièrement avec un départ destiné à l'alimentation d'une charge spécifique par une ligne longue ou lorsqu'une perturbation est générée ou amplifiée dans l'installation dont les équipements font partie.
Les niveaux de compatibilité sont spécifiés pour les différents types de perturbations électromagnétiques à basse fréquence qui sont attendues en tout point de couplage interne à l'installation (IPC) dans des sites industriels, afin de fournir des recommandations pour définir:
a) les limites relatives aux émissions perturbatrices sur les réseaux de distribution d'électricité industriels (y compris les niveaux de planification définis au 3.1.5);
NOTE 3 Les conditions présentes dans les environnements électromagnétiques des réseaux industriels peuvent être très variées. Ces conditions sont représentées dans le présent document par les trois classes décrites à l'Article 4. Néanmoins, il est de la responsabilité de l'exploitant d'un tel réseau de prendre en compte les conditions électromagnétiques et économiques particulières, notamment les caractéristiques des équipements, pour établir les limites susmentionnées.
b) les niveaux d'immunité des équipements présents dans ces systèmes.
Les phénomènes perturbateurs suivants sont pris en compte:
- les écarts de tension;
- les creux de tension et les coupures brèves;
- les déséquilibres de tension;
- les variations de la fréquence du réseau d'alimentation;
- les harmoniques jusqu'au rang 40 inclus;
- les interharmoniques jusqu'au rang harmonique 40;
- les composantes de tension au-dessus du rang harmonique 40 jusqu'à 150 kHz;
- la composante continue;
- les surtensions transitoires.
Les niveaux de compatibilité sont donnés pour différentes classes d'environnement, qui sont déterminées par les caractéristiques du réseau d'alimentation et des charges associées.
NOTE 4 Les niveaux de compatibilité au point de couplage commun (PCC) sur les réseaux publics sont spécifiés dans l'IEC 61000‑2‑2 pour les réseaux basse tension et dans l'IEC 61000‑2‑12 pour les réseaux moyenne tension. L'IEC TR 61000‑3‑6 et l'IEC TR 61000‑3‑7 décrivent l'approche des exploitants de réseaux de distribution d'électricité en ce qui concerne la limitation des émissions des installations et des charges importantes.
Cette troisième édition annule et remplace la deuxième édition parue en 2002. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) ajout de nouvelles classes 2a, 2b et 2L (anciennement la classe 2);
b) modification des niveaux de compatibilité pour la classe 3;
c) ajout de niveaux de compatibilité dans la plage de fréquences de 2 kHz à 150 kHz;
d) ajout de niveaux de compatibilité qui utilisent une nouvelle grandeur: la distorsion harmonique partielle pondérée (PWHD).
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IEC 61000-2-4 ®
Edition 3.0 2024-07
REDLINE VERSION
INTERNATIONAL
STANDARD
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Electromagnetic compatibility (EMC) –
Part 2-4: Environment – Compatibility levels in power distribution systems in
industrial plants locations for low-frequency conducted disturbances
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IEC 61000-2-4 ®
Edition 3.0 2024-07
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Electromagnetic compatibility (EMC) –
Part 2-4: Environment – Compatibility levels in power distribution systems in
industrial plants locations for low-frequency conducted disturbances
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.100.10; 33.100.20 ISBN 978-2-8322-9462-8
– 2 – IEC 61000-2-4:2024 RLV IEC 2024
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 9
3 Terms, definitions and abbreviated terms . 9
3.1 General definitions . 10
3.2 Phenomena-related definitions . 12
3.3 Abbreviated terms . 16
4 Electromagnetic environment classes . 16
5 Introduction to the setting of compatibility levels for different types of
electromagnetic disturbances . 18
5.1 General comment. 18
5.2 Voltage deviations . 19
5.3 Voltage dips and short interruptions . 19
5.4 Voltage unbalance (imbalance) . 19
5.5 Temporary power-frequency variation . 20
5.6 Harmonics . 20
5.7 Interharmonics . 21
th
5.8 Voltage components at higher frequencies (above 50 40 harmonic) . 21
5.9 Transient overvoltages . 21
5.10 DC component . 21
6 Compatibility levels . 22
Annex A (informative) Explanations and examples for interharmonics . 27
A.1 Resolution of non-sinusoidal voltages and currents . 27
A.2 Time varying phenomena . 28
A.3 Definition of additional terms .
Annex B (informative) Examples of expected disturbance levels in typical industrial
networks . 30
B.1 General . 30
B.2 Voltage disturbance levels in industrial networks due to large converters . 30
B.3 Voltage disturbance levels in industrial networks at high load . 32
B.4 Voltage dips and short interruptions . 34
B.4.1 Description . 34
B.4.2 Adaptation . 35
B.5 Transient overvoltages . 36
Annex C (informative) Interharmonics and voltages at higher frequencies and
mitigation methods . 38
C.1 Sources of interharmonics . 38
C.1.1 Identification . 38
C.1.2 Different types of sources of interharmonics . 38
C.1.3 Effects of interharmonics and compatibility . 40
C.1.4 Guidance levels . 41
C.2 Mitigation methods . 42
C.2.1 General . 42
C.2.2 Decrease emission levels . 42
C.2.3 Increase immunity . 43
C.2.4 Protection of ripple control system mains signaling . 43
C.3 Voltages at higher frequencies .
Annex D (informative) Proving compatibility in the frequency range above 2 kHz in
industrial MV networks . 45
Annex E (informative) Examples of locations and installations covered by
IEC 61000-2-4 . 46
E.1 General . 46
E.2 Mixed locations . 46
E.3 Examples for industrial locations . 46
Annex F (informative) Rationale for increased individual even and triplen compatibility
levels and for splitting class 2 into class 2a, class 2b and class 2L . 50
F.1 Rationale for increased individual even and triplen compatibility levels . 50
F.1.1 Target . 50
F.1.2 The needs of modern power electronic equipment . 50
F.1.3 Maintaining the overall disturbance level . 51
F.2 Rationale for splitting class 2 into class 2a, class 2b and class 2L . 51
F.2.1 Target . 51
F.2.2 Class 2a . 51
F.2.3 Class 2b . 51
F.2.4 Class 2L . 52
Bibliography . 53
Figure 1 – Examples of the application of different electromagnetic environment
classes in different industrial locations . 17
Figure 2 – Example of different parts of an installation separated by filters, where
different electromagnetic environment classes are applied . 18
Figure 1 3 – Interharmonic compatibility levels (flickermeter response for P = 1
st
related to 60 W incandescent lamps) . 26
Figure B.1 – Example of power distribution in industry with rolling mills . 31
Figure B.2 – Example of power distribution in the paper industry . 32
Figure B.3 – Example of power distribution in a generic manufacturing industry . 34
Figure B.4 – ITI (CBEMA) – Curve of tolerance envelope of ITE . 36
Figure E.1 – Example of class 1 environment . 46
Figure E.2 – Example of class 2a and class 2b environments . 47
Figure E.3 – Example of an LV grid in a building supplied by a dedicated transformer . 47
Figure E.4 – Example of an LV grid in a building including residential and industrial
locations . 48
Figure E.5 – Example of an LV grid for a data center . 48
Figure F.1 – Emission spectrum of an active infeed converter . 50
Table 1 – Compatibility levels for voltage tolerance, voltage unbalance imbalance and
power-frequency variations . 22
Table 2 – Compatibility levels for harmonics – Harmonic voltage components
Odd harmonics non-multiple of three .
Table 3 – Compatibility levels for harmonics – Harmonic voltage components
Odd harmonics multiple of three .
Table 4 – Compatibility levels – Harmonic voltage components even order .
Table 2 – Compatibility levels for harmonics – Harmonic voltage components. 23
– 4 – IEC 61000-2-4:2024 RLV IEC 2024
Table 5 3 – Compatibility levels for total voltage harmonic distortion . 24
Table 4 – Compatibility levels for low voltage networks in the frequency range from
2 kHz to 9 kHz . 25
Table 5 – Compatibility levels for low voltage networks in the frequency range from
9 kHz to 150 kHz . 25
Table B.1 – Type of network . 30
Table B.2 – Voltage disturbance levels in a typical manufacturing industry .
...
IEC 61000-2-4 ®
Edition 3.0 2024-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electromagnetic compatibility (EMC) –
Part 2-4: Environment – Compatibility levels in power distribution systems in
industrial locations for low-frequency conducted disturbances
Compatibilité électromagnétique (CEM) –
Partie 2-4: Environnement – Niveaux de compatibilité dans les réseaux de
distribution d'électricité sur des sites industriels pour les perturbations
conduites à basse fréquence
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
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About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.
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IEC 61000-2-4 ®
Edition 3.0 2024-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electromagnetic compatibility (EMC) –
Part 2-4: Environment – Compatibility levels in power distribution systems in
industrial locations for low-frequency conducted disturbances
Compatibilité électromagnétique (CEM) –
Partie 2-4: Environnement – Niveaux de compatibilité dans les réseaux de
distribution d'électricité sur des sites industriels pour les perturbations
conduites à basse fréquence
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.100.10; 33.100.20 ISBN 978-2-8322-9416-1
– 2 – IEC 61000-2-4:2024 IEC 2024
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 9
3 Terms, definitions and abbreviated terms . 9
3.1 General definitions . 9
3.2 Phenomena-related definitions . 11
3.3 Abbreviated terms . 15
4 Electromagnetic environment classes . 15
5 Introduction to the setting of compatibility levels for different types of
electromagnetic disturbances . 17
5.1 General comment. 17
5.2 Voltage deviations . 17
5.3 Voltage dips and short interruptions . 17
5.4 Voltage imbalance . 18
5.5 Temporary power-frequency variation . 18
5.6 Harmonics . 18
5.7 Interharmonics . 19
th
5.8 Voltage components at higher frequencies (above 40 harmonic) . 19
5.9 Transient overvoltages . 20
5.10 DC component . 20
6 Compatibility levels . 20
Annex A (informative) Explanations and examples for interharmonics . 24
A.1 Resolution of non-sinusoidal voltages and currents . 24
A.2 Time varying phenomena . 25
Annex B (informative) Examples of expected disturbance levels in typical industrial
networks . 26
B.1 General . 26
B.2 Voltage disturbance levels in industrial networks due to large converters . 26
B.3 Voltage disturbance levels in industrial networks at high load . 28
B.4 Voltage dips and short interruptions . 30
B.4.1 Description . 30
B.4.2 Adaptation . 31
B.5 Transient overvoltages . 31
Annex C (informative) Interharmonics and voltages at higher frequencies and
mitigation methods . 33
C.1 Sources of interharmonics . 33
C.1.1 Identification . 33
C.1.2 Different types of sources of interharmonics . 33
C.1.3 Effects of interharmonics and compatibility . 35
C.1.4 Guidance levels . 35
C.2 Mitigation methods . 37
C.2.1 General . 37
C.2.2 Decrease emission levels . 37
C.2.3 Increase immunity . 38
C.2.4 Protection of mains signaling . 38
Annex D (informative) Proving compatibility in the frequency range above 2 kHz in
industrial MV networks . 39
Annex E (informative) Examples of locations and installations covered by
IEC 61000-2-4 . 40
E.1 General . 40
E.2 Mixed locations . 40
E.3 Examples for industrial locations . 40
Annex F (informative) Rationale for increased individual even and triplen compatibility
levels and for splitting class 2 into class 2a, class 2b and class 2L . 44
F.1 Rationale for increased individual even and triplen compatibility levels . 44
F.1.1 Target . 44
F.1.2 The needs of modern power electronic equipment . 44
F.1.3 Maintaining the overall disturbance level . 45
F.2 Rationale for splitting class 2 into class 2a, class 2b and class 2L . 45
F.2.1 Target . 45
F.2.2 Class 2a . 45
F.2.3 Class 2b . 45
F.2.4 Class 2L . 46
Bibliography . 47
Figure 1 – Examples of the application of different electromagnetic environment
classes in different industrial locations . 16
Figure 2 – Example of different parts of an installation separated by filters, where
different electromagnetic environment classes are applied . 16
Figure 3 – Interharmonic compatibility levels (flickermeter response for P = 1 related
st
to 60 W incandescent lamps) . 23
Figure B.1 – Example o
...
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