SIST EN IEC 61000-4-30:2026

SLOVENSKI STANDARD
01-februar-2026
Nadomešča:
SIST EN 61000-4-30:2015
SIST EN 61000-4-30:2015/A1:2021
SIST EN 61000-4-30:2015/AC:2017
Elektromagnetna združljivost (EMC) - 4-30. del: Preskusne in merilne tehnike -
Metode merjenja kakovosti napetosti
Electromagnetic compatibility (EMC) - Part 4-30: Testing and measurement techniques -
Power quality measurement methods
Elektromagnetische Verträglichkeit (EMV) - Teil 4-30: Prüf- und Messverfahren -
Verfahren zur Messung der Spannungsqualität
Compatibilité électromagnétique (CEM) - Partie 4-30: Techniques d'essai et de mesure -
Méthodes de mesure de la qualité de l'alimentation
Ta slovenski standard je istoveten z: EN IEC 61000-4-30:2025
ICS:
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 61000-4-30

NORME EUROPÉENNE
EUROPÄISCHE NORM December 2025
ICS 33.100.99 Supersedes EN 61000-4-30:2015; EN 61000-4-
30:2015/AC:2017-01; EN 61000-4-30:2015/A1:2021
English Version
Electromagnetic compatibility (EMC) - Part 4-30: Testing and
measurement techniques - Power quality measurement methods
(IEC 61000-4-30:2025)
Compatibilité électromagnétique (CEM) - Partie 4-30: Elektromagnetische Verträglichkeit (EMV) - Teil 4-30: Prüf-
Techniques d'essai et de mesure - Méthodes de mesure de und Messverfahren - Verfahren zur Messung der
la qualité de l'alimentation Spannungsqualität
(IEC 61000-4-30:2025) (IEC 61000-4-30:2025)
This European Standard was approved by CENELEC on 2025-11-28. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61000-4-30:2025 E

European foreword
The text of document 77A/1253/FDIS, future edition 4 of IEC 61000-4-30, prepared by SC 77A "EMC -
Low frequency phenomena" of IEC/TC 77 "Electromagnetic compatibility" was submitted to the IEC-
CENELEC parallel vote and approved by CENELEC as EN IEC 61000-4-30:2025.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2026-12-31
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2028-12-31
document have to be withdrawn
This document supersedes EN 61000-4-30:2015 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 61000-4-30:2025 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
IEC 62586-1 NOTE Approved as EN 62586-1
IEC 61000-2-2:2002 NOTE Approved as EN 61000-2-2:2002 (not modified)
IEC 61000-2-12 NOTE Approved as EN 61000-2-12
IEC 61000-4-4:2012 NOTE Approved as EN 61000-4-4:2012 (not modified)
IEC 61000-4-19 NOTE Approved as EN 61000-4-19
IEC 61000-6-3:2020 NOTE Approved as EN IEC 61000-6-3:2021 (not modified)
IEC 61010-1 NOTE Approved as EN 61010-1
IEC 61010-2-030 NOTE Approved as EN IEC 61010-2-030
IEC 61010-2-032 NOTE Approved as EN IEC 61010-2-032
IEC 61557-12:2018 NOTE Approved as EN IEC 61557-12:2022 (not modified)
IEC 61869-2:2012 NOTE Approved as EN 61869-2:2012 (not modified)
IEC 61869-3:2011 NOTE Approved as EN 61869-3:2011 (not modified)
IEC 62428:2008 NOTE Approved as EN 62428:2008 (not modified)
CISPR 16-1-1:2019 NOTE Approved as EN IEC 55016-1-1:2019 (not modified)
CISPR 16-2-1:2014 NOTE Approved as EN 55016-2-1:2014 (not modified)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60050-161 1990 International Electrotechnical Vocabulary. - -
Chapter 161: Electromagnetic compatibility
+ A9 2019 - -
IEC 61000-2-4 2024 Electromagnetic compatibility (EMC) - Part EN IEC 61000-2-4 2024
2-4: Environment - Compatibility levels in
power distribution systems in industrial
locations for low-frequency conducted
disturbances
IEC 61000-4-7 2002 Electromagnetic compatibility (EMC) - Part EN 61000-4-7 2002
4-7: Testing and measurement techniques
- General guide on harmonics and
interharmonics measurements and
instrumentation, for power supply systems
and equipment connected thereto
+ A1 2008 + A1 2009
IEC 61000-4-15 2010 Electromagnetic compatibility (EMC) - Part EN 61000-4-15 2011
4-15: Testing and measurement
techniques - Flickermeter - Functional and
design specifications
IEC 62586-2 - Power quality measurement in power EN 62586-2 -
supply systems - Part 2: Functional tests
and uncertainty requirements
IEC 61000-4-30 ®
Edition 4.0 2025-10
INTERNATIONAL
STANDARD
Electromagnetic compatibility (EMC) -
Part 4-30: Testing and measurement techniques - Power quality measurement
methods
ICS 33.100.99  ISBN 978-2-8327-0783-8

IEC 61000-4-30:2025-10(en)
IEC 61000-4-30:2025 © IEC 2025
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 9
2 Normative references . 9
3 Terms, definitions, and abbreviated terms . 10
3.1 Terms and definitions . 10
3.2 Abbreviated terms . 16
4 General . 17
4.1 Classes of measurement . 17
4.2 Organization of the measurements . 17
4.3 Electrical values to be measured . 18
4.4 Measurement aggregation over time intervals . 18
4.5 Measurement aggregation algorithm . 19
4.5.1 Requirements . 19
4.5.2 150/180-cycle aggregation . 19
4.5.3 10 min aggregation. 19
4.5.4 2 h aggregation . 22
4.6 Maximum permissible error of the time clock. 22
4.7 Maximum permissible errors of power quality parameters . 22
4.8 Flagging concept . 22
5 Power quality parameters . 23
5.1 General . 23
5.2 Power frequency . 23
5.2.1 Measurement method . 23
5.2.2 Maximum permissible measurement error and measuring range. 23
5.2.3 Measurement evaluation . 24
5.2.4 Aggregation . 24
5.3 Magnitude of the supply voltage . 24
5.3.1 Measurement method . 24
5.3.2 Maximum permissible measurement error and measuring range. 24
5.3.3 Measurement evaluation . 24
5.3.4 Aggregation . 24
5.4 Flicker . 24
5.4.1 Measurement method . 24
5.4.2 Maximum permissible measurement error and measuring range. 25
5.4.3 Measurement evaluation . 25
5.4.4 Aggregation . 25
5.5 Supply voltage dip and swell events . 25
5.5.1 Measurement method . 25
5.5.2 Voltage dips on single-phase systems . 26
5.5.3 Voltage swells on single-phase systems . 27
5.5.4 Voltage dip and swell events on polyphase systems . 28
5.5.5 Maximum permissible measurement error . 30
5.5.6 Aggregation . 31
5.6 Supply voltage interruptions . 31
5.6.1 Measurement method . 31
IEC 61000-4-30:2025 © IEC 2025
5.6.2 Detection and evaluation. 31
5.6.3 Maximum permissible measurement error . 32
5.6.4 Aggregation . 32
5.7 Transient voltages . 32
5.8 Supply voltage unbalance . 32
5.8.1 Measurement method . 32
5.8.2 Maximum permissible measurement error and measuring range. 33
5.8.3 Measurement evaluation . 33
5.8.4 Aggregation . 33
5.9 Voltage harmonics . 34
5.9.1 Measurement method . 34
5.9.2 Maximum permissible measurement error and measuring range. 34
5.9.3 Measurement evaluation . 35
5.9.4 Aggregation . 35
5.10 Voltage interharmonics . 35
5.10.1 Measurement method . 35
5.10.2 Maximum permissible measurement error and measuring range. 35
5.10.3 Evaluation . 35
5.10.4 Aggregation . 35
5.11 MCS voltage on the supply voltage . 36
5.11.1 Measurement method . 36
5.11.2 Maximum permissible measurement error and measuring range. 36
5.11.3 Aggregation . 36
5.12 Rapid voltage changes (RVC) . 36
5.12.1 General . 36
5.12.2 RVC event detection . 37
5.12.3 RVC event evaluation . 39
5.12.4 Examples of RVC event evaluation . 41
5.12.5 Maximum permissible measurement error . 41
5.12.6 Aggregation . 42
5.13 Current . 42
5.13.1 General . 42
5.13.2 Magnitude of current. 42
5.13.3 Current recording . 43
5.13.4 Harmonic currents . 43
5.13.5 Interharmonic currents . 44
5.13.6 Current unbalance . 44
6 Performance verification . 44
Annex A (informative) Power quality measurements – Issues and guidelines . 47
A.1 General . 47
A.2 Installation precautions . 47
A.2.1 General . 47
A.2.2 Test leads . 47
A.2.3 Guarding of live parts . 48
A.2.4 Monitor placement . 48
A.2.5 Earthing . 49
A.2.6 Interference . 49
A.3 Transducers . 49
IEC 61000-4-30:2025 © IEC 2025
A.3.1 General . 49
A.3.2 Signal levels . 50
A.3.3 Frequency response of transducers . 51
A.3.4 Transducers for measuring transients . 51
A.4 Transient voltages and currents. 52
A.4.1 General . 52
A.4.2 Frequency and amplitude characteristics of AC mains transients . 52
A.4.3 Transient voltage detection . 53
A.4.4 Transient voltage evaluation . 54
A.4.5 Effect of surge protective devices on transient measurements . 54
A.5 Voltage dip characteristics . 54
A.5.1 General . 54
A.5.2 Rapidly updated RMS values . 55
A.5.3 Phase angle/point-on-wave . 55
A.5.4 Voltage dip unbalance . 55
A.5.5 Phase shift during voltage dip. 56
A.5.6 Missing voltage . 56
A.5.7 Distortion during voltage dip . 56
A.5.8 Other characteristics and references . 56
Annex B (informative) Power quality measurement – Guidance for applications . 57
B.1 Contractual applications of power quality measurements. 57
B.1.1 General . 57
B.1.2 General considerations . 57
B.1.3 Specific considerations . 58
B.2 Statistical survey applications . 61
B.2.1 General . 61
B.2.2 Considerations . 61
B.2.3 Power quality indices . 62
B.2.4 Monitoring objectives . 62
B.2.5 Economic aspects of power quality surveys . 62
B.3 Locations and types of surveys . 63
B.3.1 Monitoring locations . 63
B.3.2 Pre-monitoring site surveys . 64
B.3.3 Customer side site survey . 64
B.3.4 Network side survey . 64
B.4 Connections and quantities to measure . 64
B.4.1 Equipment connection options . 64
B.4.2 Priorities: quantities to measure . 65
B.4.3 Current monitoring . 65
B.5 Selecting the monitoring thresholds and monitoring period . 66
B.5.1 Monitoring thresholds . 66
B.5.2 Monitoring period . 66
B.6 Statistical analysis of the measured data . 67
B.6.1 General . 67
B.6.2 Indices . 67
B.7 Trouble-shooting applications. 67
B.7.1 General . 67
B.7.2 Power quality signatures . 67
IEC 61000-4-30:2025 © IEC 2025
B.7.3 Waveform data format . 68
Annex C (informative) Functional design and specification for measurements in the 2 kHz
to 9 kHz range for Class A and Class S equipment . 69
C.1 General . 69
C.2 Voltage disturbances in the 2 kHz to 9 kHz range . 69
C.2.1 Measurement method . 69
C.2.2 Maximum permissible measurement error . 69
C.2.3 Aggregation . 70
Annex D (informative) Functional design and specifications for measurements in the
9 kHz to 150 kHz range . 71
D.1 General . 71
D.2 Background . 71
D.3 Comparability requirements . 72
D.4 Method overview . 72
D.5 Signal input stage . 74
D.5.1 General . 74
D.5.2 Input filtering . 74
D.5.3 Frequency response . 74
D.5.4 Transducer compensation . 74
D.5.5 Measuring range . 75
D.5.6 Overload detection . 75
D.6 Fourier transform stage . 76
D.6.1 General . 76
D.6.2 DFT window design . 77
D.6.3 Application of the DFT . 79
D.6.4 Selectivity and power bandwidth . 80
D.7 Detector stage . 80
D.7.1 General . 80
D.7.2 RMS detector. 81
D.7.3 Peak detector . 81
D.7.4 Quasi-peak detector . 81
D.7.5 Average detector . 83
D.7.6 RMS-average detector . 83
D.8 Indicator stage . 84
D.9 Adjustment of time constants . 86
D.10 Accuracy requirements . 87
D.10.1 General . 87
D.10.2 Accuracy requirements for measuring steady-state sinusoidal signals. 87
D.10.3 Accuracy requirements for measuring impulsive signals . 87
D.11 Aggregation. 91
D.11.1 General . 91
D.11.2 Aggregation time intervals . 91
D.11.3 Aggregation methods . 91
D.12 Integration of signal levels over frequency . 92
Bibliography . 93

Figure 1 – Measurement chain . 17
Figure 2 – Synchronization of aggregation intervals for Class A . 20
IEC 61000-4-30:2025 © IEC 2025
Figure 3 – Synchronization of aggregation intervals for Class S: parameters for which
gaps are not permitted . 21
Figure 4 – Synchronization of aggregation intervals for Class S: parameters for which
gaps are permitted (see 4.5.2) . 21
Figure 5 – Example of the MPE of a supply voltage unbalance measurement . 33
Figure 6 – RVC event: example of a change in RMS voltage that results in an RVC event . 41
Figure 7 – Not an RVC event: example of a change in RMS voltage that does not result in
an RVC event because the dip threshold is exceeded. 41
Figure A.1 – Frequency spectrum of typical representative transient test waveforms . 53
Figure D.1 – Block diagram of the 9 kHz to 150 kHz measurement method . 73
Figure D.2 – Quasi-peak detector equivalent circuit . 81
Figure D.3 – Indicator response to a 160 ms impulse pulse width when represented by a
nd
2 order Linkwitz-Riley low-pass filter tuned to the frequency f = 0,9947 Hz . 86
c
Figure D.4 – Impulses with an amplitude of 5,51 V and a width of 2,45 µs to assess
instrument compliance at 100 Hz . 90

Table 1 – Summary of requirements (see subclauses for actual requirements) . 45
Table D.1 – Band A IF filter impulse response zero-crossing times . 78
Table D.2 – Adjusted time constants for the quasi-peak detector . 86
Table D.3 – Sinusoidal signal accuracy requirements from 9 kHz to 150 kHz . 87
Table D.4 – Impulsive signal accuracy requirements from 9 kHz to 150 kHz. 88
Table D.5 – Reference quasi-peak response to spectrally flat impulses . 89

IEC 61000-4-30:2025 © IEC 2025
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Electromagnetic compatibility (EMC) -
Part 4-30: Testing and measurement techniques -
Power quality measurement methods

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) patent(s).
IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in respect thereof.
As of the date of publication of this document, IEC had not received notice of (a) patent(s), which may be required
to implement this document. However, implementers are cautioned that this may not represent the latest information,
which may be obtained from the patent database available at https://patents.iec.ch. IEC shall not be held responsible
for identifying any or all such patent rights.
IEC 61000 4-30 has been prepared by subcommittee 77A: EMC – Low- frequency phenomena, of
IEC technical committee 77: Electromagnetic compatibility. It is an International Standard.
It forms part 4-30 of IEC 61000. It has the status of a basic EMC publication in accordance with
IEC Guide 107.
This fourth edition cancels and replaces the third edition published in 2015. This edition constitutes
a technical revision.
IEC 61000-4-30:2025 © IEC 2025
This edition includes the following significant technical changes with respect to the previous
edition:
a) IEC 61000-4-30:2015/AMD1:2021 and IEC 61000-4-30:2015/COR1:2016 were included.
b) The measurement method for rapid voltage changes (RVC) has been corrected and extended.
c) The measurement method for voltage events has been updated and extended.
d) Annex C was divided into 2 parts:
1) Annex C: The measurement method from IEC 61000-4-7:2002 and
IEC 61000-4-7:2002/AMD1:2008, Annex B for conducted emissions in the 2 kHz to 9 kHz
range has been separated.
2) Annex D: A new measurement method for conducted emissions in the 9 kHz to 150 kHz
range has been added.
e) Annex D (underdeviation and overdeviation parameters) was removed.
f) Annex E (Class B) was removed.
The text of this International Standard is based on the following documents:
Draft Report on voting
77A/1253/FDIS 77A/1268/RVD
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 International Standard 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.
A list of all parts in the IEC 61000 series, published under the general title Electromagnetic
compatibility (EMC), can be found on the IEC website.
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.
IEC 61000-4-30:2025 © IEC 2025
INTRODUCTION
IEC 61000 is published in separate parts according to the following structure:
Part 1: General
– General considerations (introduction, fundamental principles)
– Definitions, terminology
Part 2: Environment
– Description of the environment
– Classification of the environment
– Compatibility levels
Part 3: Limits
– Emission limits
– Immunity limits (in so far as they do not fall under the responsibility of the product committees)
Part 4: Testing and measurement techniques
– Measurement techniques
– Testing techniques
Part 5: Installation and mitigation guidelines
– Installation guidelines
– Mitigation methods and devices
Part 6: Generic standards
Part 9: Miscellaneous
Each part is further subdivided into several parts, published either as International Standards or
as Technical Specifications or Technical Reports, some of which have already been published as
sections. Others will be published with the part number followed by a dash and completed by a
second number identifying the subdivision (example: IEC 61000-6-1).

IEC 61000-4-30:2025 © IEC 2025
1 Scope
This part of IEC 61000-4 defines the methods for measurement and interpretation of results for
power quality parameters in AC power supply systems with a declared fundamental frequency of
50 Hz or 60 Hz.
Measurement methods are described for each relevant parameter in terms that give reliable and
repeatable results, regardless of the method's implementation. This document addresses
measurement methods for in-situ measurements.
This document covers two classes of measurement methods (Class A and Class S). The classes
of measurement are specified in Clause 4.
NOTE 1 In this document, "A" stands for "advanced" and "S" stands for "surveys".
Measurement of parameters covered by this document is limited to conducted phenomena in power
systems. The power quality parameters considered in this document are power frequency,
magnitude of the supply voltage, flicker, supply voltage dips and swells, voltage interruptions,
transient voltages, supply voltage unbalance, voltage harmonics and interharmonics, rapid voltage
changes, mains communicating system (MCS) voltages, magnitude of current, harmonic currents,
interharmonic currents and current unbalance.
Emissions in the 2 kHz to 150 kHz range are considered in Annex C and Annex D.
Depending on the purpose of the measurement, all or a subset of the phenomena on this list can
be measured.
NOTE 2 Test methods for verifying compliance with this document can be found in IEC 62586-2.
NOTE 3 The effects of transducers inserted between the power system and the instrument are acknowledged but not
addressed in detail in this document. Guidance about effects of transducers can be found IEC TR 61869-103.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 60050-161:1990, International Electrotechnical Vocabulary (IEV) - Part 161: Electromagnetic
compatibility
IEC 60050-161:1990/AMD9:2019
IEC 61000-2-4:2024, Electromagnetic compatibility (EMC) - Part 2-4: Environment - Compatibility
levels in power distribution systems in industrial locations for low-frequency conducted
disturbances
IEC 61000-4-7:2002, Electromagnetic compatibility (EMC) - Part 4-7: Testing and measurement
techniques - General guide on harmonics and interharmonics measurements and instrumentation,
for power supply systems and equipment connected thereto
IEC 61000-4-7:2002/AMD1:2008
IEC 61000-4-15:2010, Electromagnetic compatibility (EMC) - Part 4-15: Testing and measurement
techniques - Flickermeter - Functional and design specifications
IEC 62586-2, Power quality measurement in power supply systems - Part 2: Functional tests and
uncertainty requirements
IEC 61000-4-30:2025 © IEC 2025
3 Terms, definitions, and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60050-161 and the
following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
– IEC Electropedia: available at https://www.electropedia.org/
– ISO Online browsing platform: available at https://www.iso.org/obp
3.1.1
channel
individual measurement path through an instrument
Note 1 to entry: "Channel" and "phase" are not the same. A voltage channel is by definition the difference in potential
between two conductors. Phase refers to a single conductor. On polyphase systems, a channel can be between any two
phases, or between any phase and neutral, or between any phase and earth, or between neutral and earth.
3.1.2
declared input voltage
U
din
value obtained from the declared supply voltage by a transducer ratio
Note 1 to entry: This quantity can be expressed as a phase-to-phase or as a phase-to-neutral value.
3.1.3
declared supply voltage
U
c
nominal voltage U of the system
n
Note 1 to entry: If by agreement between the supplier and the customer a voltage different from the nominal voltage is
applied to the terminals, then this voltage is the declared supply voltage U .
c
3.1.4
dip threshold
voltage magnitude specified for the purpose of detecting the start and the end of a voltage dip
3.1.5
flagged data
for any measurement time interval in which interruptions, dips or swells occur, marked
measurement results of all other parameters made during this time interval
Note 1 to entry: For some applications, this 'marked' or 'flagged' data can be excluded from further analysis, for
example. See 4.8 for further explanation.
3.1.6
flicker
impression of unsteadiness of visual sensation induced by a light stimulus whose luminance or
spectral distribution fluctuates with time
[SOURCE: IEC 60050-161:1990, 161-08-13]
IEC 61000-4-30:2025 © IEC 2025
3.1.6.1
P
st
short-term flicker severity
Note 1 to entry: Unless otherwise specified, the P evaluation time is 10 min. For the purpose of power quality surveys
st
and studies, other time intervals may be used, and should be defined in the index. For example a 1 min interval should
be written as P .
st,1m
[SOURCE: IEC 61000-4-15:2010, 3.2]
3.1.6.2
P
lt
long-term flicker severity
N
P
∑
3 st
i
i=1
P =
lt
N
where P (i = 1, 2, 3, .) are consecutive readings of the s
...