|
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
your local IEC member National Committee for further information.
3, rue de
CH-1211 Geneva 20
Switzerland
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.
IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch
The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews, graphical symbols and the glossary.
committee, …). It also gives information on projects, replaced With a subscription you will always have access to up to date
and withdrawn publications. content tailored to your needs.
IEC Just Published - webstore.iec.ch/justpublished
Electropedia - www.electropedia.org
Stay up to date on all new IEC publications. Just Published
The world's leading online dictionary on electrotechnology,
details all new publications released. Available online and once
containing more than 22 500 terminological entries in English
a month by email.
and French, with equivalent terms in 25 additional languages.
Also known as the International Electrotechnical Vocabulary
IEC Customer Service Centre - webstore.iec.ch/csc
(IEV) online.
If you wish to give us your feedback on this publication or need
further assistance, please contact the Customer Service
.
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 .
...