IEC 61000-4-34:2005/AMD2:2025
(Amendment)Amendment 2 - Electromagnetic compatibility (EMC) - Part 4-34: Testing and measurement techniques - Voltage dips, short interruptions and voltage variations immunity tests for equipment with mains current more than 16 A per phase
Amendment 2 - Electromagnetic compatibility (EMC) - Part 4-34: Testing and measurement techniques - Voltage dips, short interruptions and voltage variations immunity tests for equipment with mains current more than 16 A per phase
Amendement 2 - Compatibilité électromagnétique (CEM) - Partie 4-34: Techniques d'essai et de mesure - Essais d'immunité aux creux de tension, coupures brèves et variations de tension pour matériel ayant un courant d'alimentation de plus de 16 A par phase
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IEC 61000-4-34 ®
Edition 1.0 2025-08
INTERNATIONAL
STANDARD
BASIC EMC PUBLICATION
AMENDMENT 2
Electromagnetic compatibility (EMC) -
Part 4-34: Testing and measurement techniques - Voltage dips, short interruptions
and voltage variations immunity tests for equipment with mains current more than
16 A per phase
ICS 33.100.20 ISBN 978-2-8327-0628-2
IEC 61000-4-34:2005-10/AMD2:2025-08(en)
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or
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International Standards for all electrical, electronic and related technologies.
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____________
Electromagnetic compatibility (EMC) -
Part 4-34: Testing and measurement techniques - Voltage dips, short
interruptions and voltage variations immunity tests for equipment with
mains current more than 16 A per phase
AMENDMENT 2
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, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC Publication(s)"). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely 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
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, pro
...
IEC 61000-4-34 ®
Edition 1.0 2025-08
NORME
INTERNATIONALE
PUBLICATION FONDAMENTALE EN CEM
AMENDEMENT 2
Compatibilité électromagnétique (CEM) -
Partie 4-34: Techniques d'essai et de mesure -Essais d'immunité aux creux de
tension, coupures brèves et variations de tension pour matériel ayant un courant
d'alimentation de plus de 16 A par phase
ICS 33.100.20 ISBN 978-2-8327-0628-2
IEC 61000-4-34:2005-10/AMD2:2025-08(fr)
Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite ni
utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et
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COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
____________
Compatibilité électromagnétique (CEM) -
Part 4-34: Techniques d'essai et de mesure - Essais d'immunité aux creux
de tension, coupures brèves et variations de tension pour matériel ayant
un courant d'alimentation de plus de 16 A par phase
AMENDEMENT 2
AVANT-PROPOS
1) La Commission Electrotechnique Internationale (IEC) est une organisation mondiale de normalisation composée
de l'ensemble des comités électrotechniques nationaux (Comités nationaux de l'IEC). L'IEC a pour objet de
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nature que ce soit, directe ou indirecte, ou pour suppor
...
IEC 61000-4-34 ®
Edition 1.0 2025-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
BASIC EMC PUBLICATION
PUBLICATION FONDAMENTALE EN CEM
AMENDMENT 2
AMENDEMENT 2
Electromagnetic compatibility (EMC) -
Part 4-34: Testing and measurement techniques - Voltage dips, short
interruptions and voltage variations immunity tests for equipment with mains
current more than 16 A per phase
Compatibilité électromagnétique (CEM) -
Partie 4-34: Techniques d'essai et de mesure - Essais d'immunité aux creux de
tension, coupures brèves et variations de tension pour matériel ayant un courant
d'alimentation de plus de 16 A par phase
ICS 33.100.20 ISBN 978-2-8327-0628-2
IEC 61000-4-34:2005-10/AMD2:2025-08(en-fr)
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 either
IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC copyright
or have an enquiry about obtaining additional rights to this publication, please contact the address below or your local
IEC member National Committee for further information.
Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite ni
utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et
les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.
IEC Secretariat Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
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 - IEC Products & Services Portal - products.iec.ch
webstore.iec.ch/advsearchform Discover our powerful search engine and read freely all the
The advanced search enables to find IEC publications by a publications previews, graphical symbols and the glossary.
variety of criteria (reference number, text, technical With a subscription you will always have access to up to date
committee, …). It also gives information on projects, content tailored to your needs.
replaced and withdrawn publications.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published containing more than 22 500 terminological entries in English
details all new publications released. Available online and and French, with equivalent terms in 25 additional languages.
once a month by email. Also known as the International Electrotechnical Vocabulary
(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc
If you wish to give us your feedback on this publication or
need further assistance, please contact the Customer
Service Centre: sales@iec.ch.
A propos de l'IEC
La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.
A propos des publications IEC
Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la
plus récente, un corrigendum ou amendement peut avoir été publié.
Recherche de publications IEC - IEC Products & Services Portal - products.iec.ch
webstore.iec.ch/advsearchform Découvrez notre puissant moteur de recherche et consultez
La recherche avancée permet de trouver des publications gratuitement tous les aperçus des publications, symboles
IEC en utilisant différents critères (numéro de référence, graphiques et le glossaire. Avec un abonnement, vous aurez
texte, comité d’études, …). Elle donne aussi des toujours accès à un contenu à jour adapté à vos besoins.
informations sur les projets et les publications remplacées
ou retirées. Electropedia - www.electropedia.org
Le premier dictionnaire d'électrotechnologie en ligne au
IEC Just Published - webstore.iec.ch/justpublished monde, avec plus de 22 500 articles terminologiques en
Restez informé sur les nouvelles publications IEC. Just anglais et en français, ainsi que les termes équivalents
Published détaille les nouvelles publications parues. dans 25 langues additionnelles. Egalement appelé
Disponible en ligne et une fois par mois par email. Vocabulaire Electrotechnique International (IEV) en ligne.
Service Clients - webstore.iec.ch/csc
Si vous désirez nous donner des commentaires sur cette
publication ou si vous avez des questions contactez-
nous: sales@iec.ch.
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Electromagnetic compatibility (EMC) -
Part 4-34: Testing and measurement techniques - Voltage dips, short
interruptions and voltage variations immunity tests for equipment with
mains current more than 16 A per phase
AMENDMENT 2
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, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC Publication(s)"). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely 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
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
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) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
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shall not be held responsible for identifying any or all such patent rights.
Amendment 2 to IEC 61000-4-34:2005 has been prepared by subcommittee 77A: EMC - Low
frequency phenomena, of IEC technical committee 77: Electromagnetic compatibility.
The text of this Amendment is based on the following documents:
Draft Report on voting
77A/1233/CDV 77A/1247/RVC
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this Amendment is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications/.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
– reconfirmed,
– withdrawn, or
– revised.
___________
INTRODUCTION to Amendment 2
This amendment contains the following main changes in comparison with IEC 61000-4-34:2005
and IEC 61000-4-34:2005/AMD1:2009:
• Addition of a note in Annex C: The sign of phase angles of three-phase systems can differ
depending on the convention used. It should be noted that phase angles opposite to those
used in the figures and tables in this annex (i.e. -120° for L2 instead of +120°) are also
common. It is not intended to specify the direction of rotation of the three-phase system
used for testing.
• Add UL1-N = √(1+3P^2 )/2 in Annex C.3,
• Add a new annex "Interpretation of the rise-time and fall-time requirements during EUT
testing" (Annex F), as in IEC 61000-4-11:2020, Clause D.4:
5.1 Voltage dips and short interruptions
Replace the sixth paragraph with the following:
The voltage rise time, t , and voltage fall time, t , during abrupt changes are indicated in Table 4.
r f
Furthermore, additional information is given in Annex F with respect to the correct interpretation
of rise-time and fall-time requirements during EUT testing.
Annex C (informative) – Vectors for three-phase testing
Add, after the first paragraph, the following note:
NOTE The phase angles of three-phase systems can differ depending on the convention used. It is noted that phase
angles opposite to those used in the figures and tables in Annex C (i.e. -120° for L2 instead of +120°) are also
common. It is not intended to specify the direction of rotation of the three-phase system used for testing.
Figure C.3 – Acceptable Method 2 – phase-to-phase dip vectors
Replace Figure C.3, as modified by Amendment 1, with the following new figure:
13+ P
(C.7)
U =
LN1−
(1−P)
3 sin(30 )
−1
α= sin
(C.8)
U
L1−N
UU=
L3−−L1 L2 L3
(C.9)
1+−UU2 cos(120 +α)
( ) ( )
L1−−NNL1
=
(C.10)
βα120−
U sin(120 +α)
−1
L1−N
θ 60− sin
(C.11)
3U
L3−L1
where
P is the percent phase-to-phase dip,
expressed as a fraction of the nominal
phase-to-phase voltage.
U and U are the voltages from L1 or L2 to
L1-N L2-N
neutral (if a neutral conductor exists),
expressed as a fraction of the nominal
phase-to-neutral voltage.
=
=
Add the following new Annex F:
Annex F
(informative)
Interpretation of the rise-time and fall-time
requirements during EUT testing
In 2010 an interpretation sheet for IEC 61000-4-11:2004 (second edition) was issued. The
contents of this interpretation sheet are similarly applicable to this standard:
a) Table 4 does not apply to EUT (equipment under test) testing. Table 4 is for generator
calibration and design only.
a) With reference to Table 1 and Table 2, there is no requirement in this standard for rise-time
and fall-time when testing EUT; therefore, it is not necessary to measure these parameters
during tests.
b) With reference to Table 4, all of the requirements apply to design and calibration of the
generator. The requirements of Table 4 only apply when the load is a non-inductive 100 Ω,
50 Ω or 25 Ω resistor. The requirements of Table 4 do not apply during EUT testing.
___________
COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
____________
Compatibilité électromagnétique (CEM) -
Part 4-34: Techniques d'essai et de mesure - Essais d'immunité aux creux
de tension, coupures brèves et variations de tension pour matériel ayant
un courant d'alimentation de plus de 16 A par phase
AMENDEMENT 2
AVANT-PROPOS
1) La Commission Electrotechnique Internationale (IEC) est une organisation mondiale de normalisation composée
de l'ensemble des comités électrotechniques nationaux (Comités nationaux de l'IEC). L'IEC a pour objet de
favo
...












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