IEC 61000-4-30:2008

IEC 61000-4-30
Edition 2.0 2008-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
BASIC EMC PUBLICATION
PUBLICATION FONDAMENTALE EN CEM
Electromagnetic compatibility (EMC) –
Part 4-30: Testing and measurement techniques – Power quality measurement
methods

Compatibilité électromagnétique (CEM) –
Partie 4-30: Techniques d’essai et de mesure – Méthodes de mesure de la qualité
de l’alimentation

IEC 61000-4-30:2008

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IEC 61000-4-30
Edition 2.0 2008-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
BASIC EMC PUBLICATION
PUBLICATION FONDAMENTALE EN CEM
Electromagnetic compatibility (EMC) –
Part 4-30: Testing and measurement techniques – Power quality measurement
methods

Compatibilité électromagnétique (CEM) –
Partie 4-30: Techniques d’essai et de mesure – Méthodes de mesure de la
qualité de l’alimentation

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
XB
CODE PRIX
ICS 33.100.99 ISBN 978-2-88910-391-1
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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CONTENTS
FOREWORD.4
INTRODUCTION.6
1 Scope.7
2 Normative references.7
3 Terms and definitions .8
4 General .12
4.1 Classes of measurement methods .12
4.2 Organization of the measurements.13
4.3 Electrical values to be measured.13
4.4 Measurement aggregation over time intervals .14
4.5 Measurement aggregation algorithm .14
4.5.1 Requirements .14
4.5.2 150/180 cycle aggregation .14
4.5.3 10 min aggregation .15
4.5.4 2 hour aggregation.18
4.6 Real time clock (RTC) uncertainty.18
4.7 Flagging concept .18
5 Power quality parameters.19
5.1 Power frequency.19
5.1.1 Measurement method .19
5.1.2 Measurement uncertainty and measuring range.19
5.1.3 Measurement evaluation .19
5.1.4 Aggregation .19
5.2 Magnitude of the supply voltage.20
5.2.1 Measurement method .20
5.2.2 Measurement uncertainty and measuring range.20
5.2.3 Measurement evaluation .20
5.2.4 Aggregation .20
5.3 Flicker .20
5.3.1 Measurement method .20
5.3.2 Measurement uncertainty and measuring range.20
5.3.3 Measurement evaluation .21
5.3.4 Aggregation .21
5.4 Supply voltage dips and swells.21
5.4.1 Measurement method .21
5.4.2 Detection and evaluation of a voltage dip .22
5.4.3 Detection and evaluation of a voltage swell .22
5.4.4 Calculation of a sliding reference voltage .23
5.4.5 Measurement uncertainty and measuring range.23
5.4.6 Aggregation .24
5.5 Voltage interruptions.24
5.5.1 Measurement method .24
5.5.2 Evaluation of a voltage interruption .24
5.5.3 Measurement uncertainty and measuring range.25
5.5.4 Aggregation .25
5.6 Transient voltages .25

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61000-4-30 © IEC:2008 – 3 –
5.7 Supply voltage unbalance .25
5.7.1 Measurement method .25
5.7.2 Measurement uncertainty and measuring range.26
5.7.3 Measurement evaluation .26
5.7.4 Aggregation .26
5.8 Voltage harmonics .26
5.8.1 Measurement method .26
5.8.2 Measurement uncertainty and measuring range.27
5.8.3 Measurement evaluation .27
5.8.4 Aggregation .27
5.9 Voltage interharmonics .27
5.9.1 Measurement method .27
5.9.2 Measurement uncertainty and measuring range.28
5.9.3 Measurement evaluation .28
5.9.4 Aggregation .28
5.10 Mains signalling voltage on the supply voltage .28
5.10.1 Measurement method .28
5.10.2 Measurement uncertainty and measuring range.29
5.10.3 Measurement evaluation .29
5.10.4 Aggregation .29
5.11 Rapid Voltage Changes (RVC).29
5.12 Measurement of underdeviation and overdeviation parameters.29
5.12.1 Measurement method .29
5.12.2 Measurement uncertainty and measuring range.30
5.12.3 Aggregation .30
6 Range of influence quantities and steady-state verification .30
6.1 Range of influence quantities.30
6.2 Steady-state performance verification .32
Annex A (informative) Power quality measurements – Issues and guidelines.34
Annex B (informative) Power quality measurement – Guidance for applications .47
Annex C (informative) Guidance on instruments .59
Bibliography .62

Figure 1 – Measurement chain .13
Figure 2 – Synchronization of aggregation intervals for Class A .15
Figure 3 – Synchronization of aggregation intervals for class S: parameters for which
gaps are not permitted .16
Figure 4 – Synchronization of aggregation intervals for class S: parameters for which
gaps are permitted (see 4.5.2).17
Figure 5 – Example of supply voltage unbalance uncertainty.26
Figure A.1 – Frequency spectrum of typical representative transient test waveforms .40

Table 1 – Influence quantity range.31
Table 2 – Uncertainty steady-state verification for class A and class S.33
Table C.1 – Summary of requirements.60

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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
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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
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5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
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) 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 61000-4-30 has been prepared by subcommittee 77A: Low-
frequency phenomena, of IEC technical committee 77: Electromagnetic compatibility.
This standard forms part 4-30 of IEC 61000. It has the status of a basic EMC publication in
accordance with IEC Guide 107.
This second edition cancels and replaces the first edition published in 2003. This edition
includes the following significant technical changes with respect to the previous edition.
– Adjustments, clarifications, and corrections to class A and class B measurement methods.
– A new category, class S, intended for survey instruments, has been added.
– A new Annex C gives guidance on instruments.

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61000-4-30 © IEC:2008 – 5 –
The text of this standard is based on the following documents:
FDIS Report on voting
77A/660/FDIS 77A/666/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.
A list of all parts of the IEC 61000 series, under the general title Electromagnetic compatibility
(EMC), can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until the
maintenance result 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.

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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).

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61000-4-30 © IEC:2008 – 7 –
ELECTROMAGNETIC COMPATIBILITY (EMC) –

Part 4-30: Testing and measurement techniques –
Power quality measurement methods



1 Scope
This part of IEC 61000-4 defines the methods for measurement and interpretation of results for
power quality parameters in 50/60 Hz a.c. power supply systems.
Measurement methods are described for each relevant parameter in terms that give reliable
and repeatable results, regardless of the method’s implementation. This standard addresses
measurement methods for in situ measurements.
Measurement of parameters covered by this standard is limited to voltage phenomena that can
be conducted in a power system. The power quality parameters considered in this standard 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, mains signalling on the supply voltage and rapid voltage changes. Depending
on the purpose of the measurement, all or a subset of the phenomena on this list may be
measured.
NOTE 1 Information about current parameters may be found in A.3 and A.5.
This standard gives measurement methods and appropriate performance requirements, but
does not set thresholds.
The effects of transducers inserted between the power system and the instrument are
acknowledged but not addressed in detail in this standard. Precautions on installing monitors
on live circuits are addressed.
NOTE 2 Some guidance about effects of transducers may be found in IEC 61557-12.
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 60050-161, International Electrotechnical Vocabulary (IEV) – Chapter 161: Electro-
magnetic compatibility
IEC 61000-2-2:2002, Electromagnetic compatibility (EMC) – Part 2-2: Environment –
Compatibility levels for low-frequency conducted disturbances and signalling in public low-
voltage power supply systems
IEC 61000-2-4, Electromagnetic compatibility (EMC) – Part 2-4: Environment – Compatibility
levels in industrial plants for low-frequency conducted disturbances
IEC 61000-3-8, Electromagnetic compatibility (EMC) – Part 3: Limits – Section 8: Signalling on
low-voltage electrical installations – Emission levels, frequency bands and electromagnetic
disturbance levels

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IEC 61000-4-4:2004, Electromagnetic compatibility (EMC) – Part 4-4: Testing and measure-
ment techniques – Electrical fast transient/burst immunity test
IEC 61000-4-7:2002, Electromagnetic compatibility (EMC) – Part 4-7: Testing and measure-
ment techniques – General guide on harmonics and interharmonics measurements and
instrumentation, for power supply systems and equipment connected thereto
Amendment 1 (2008)
IEC 61000-4-15, Electromagnetic compatibility (EMC) – Part 4: Testing and measurement
techniques – Section 15: Flickermeter – Functional and design specifications
IEC 61180 (all parts), High-voltage test techniques for low voltage equipment
3 Terms and definitions
For the purpose of this document, the definitions of IEC 60050-161, as well as the following,
apply.
3.1
channel
individual measurement path through an instrument
NOTE “Channel” and “phase” are not the same. A voltage channel is by definition the difference in potential
between 2 conductors. Phase refers to a single conductor. On polyphase systems, a channel may be between 2
phases, or between a phase and neutral, or between a phase and earth, or between neutral and earth.
3.2
Coordinated Universal Time
UTC
time scale which forms the basis of a coordinated radio dissemination of standard frequencies
and time signals. It corresponds exactly in rate with international atomic time, but differs from it
by an integral number of seconds.
NOTE 1 Coordinated universal time is established by the International Bureau of Weights and Measures (BIPM)
and the International Earth Rotation Service (IERS).
NOTE 2 The UTC scale is adjusted by the insertion or deletion of seconds, so called positive or negative leap
seconds, to ensure approximate agreement with UT1.
[IEV 713-05-20]
3.3
declared input voltage
U
din
value obtained from the declared supply voltage by a transducer ratio
3.4
declared supply voltage
U
c
declared supply voltage U is normally the nominal voltage U of the system. If, by agreement
c n
between the supplier and the customer, a voltage different from the nominal voltage is applied
to the terminal, then this voltage is the declared supply voltage U
c
3.5
dip threshold
voltage magnitude specified for the purpose of detecting the start and the end of a voltage dip

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61000-4-30 © IEC:2008 – 9 –
3.6
flagged data
data that has been marked to indicate that its measurement or its aggregation may have been
affected by interruptions, dips, or swells
NOTE Flagging enables other methods that may prevent a single event from being counted as several different
types of events. Flagging is supplemental information about a measurement or aggregation. Flagged data is not
removed from the data set. In some applications, flagged data may be excluded from further analysis but in other
applications, the fact that data was flagged may be unimportant. The user, application, regulation, or other
standards determine the use of flagged data. See 4.7 for further explanation.
3.7
flicker
impression of unsteadiness of visual sensation induced by a light stimulus whose luminance or
spectral distribution fluctuates with time
[IEV 161-08-13]
3.8
fundamental component
component whose frequency is the fundamental frequency
[IEV 101-14-49, modified]
3.9
fundamental frequency
frequency in the spectrum obtained from a Fourier transform of a time function, to which all the
frequencies of the spectrum are referred
[IEV 101-14-50, modified]
NOTE In case of any remaining risk of ambiguity, the fundamental frequency may be derived from the number of
poles and speed of rotation of the synchronous generator(s) feeding the system.
3.10
harmonic component
any of the components having a harmonic frequency
[IEC 61000-2-2:2002, 3.2.4, modified]
NOTE Its value is normally expressed as an r.m.s. value. For brevity, such component may be referred to simply
as a harmonic.
3.11
harmonic frequency
frequency which is an integer multiple of the fundamental frequency
NOTE The ratio of the harmonic frequency to the fundamental frequency is the harmonic order (notation: h).
3.12
hysteresis
difference in magnitude between the start and end thresholds
NOTE 1 This definition of hysteresis is relevant to Power Quality (PQ) measurement parameters and is different
from the IEV definition which is relevant to iron core saturation.
NOTE 2 The purpose of hysteresis in the context of PQ measurements is to avoid counting multiple events when
the magnitude of the parameter oscillates about the threshold level.
3.13
influence quantity
any quantity which may affect the working performance of a measuring equipment

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[IEV 311-06-01, modified]
NOTE This quantity is generally external to the measurement equipment.
3.14
interharmonic component
component having an interharmonic frequency
[IEC 61000-2-2:2002, 3.2.6]
NOTE Its value is normally expressed as an r.m.s. value. For brevity, such a component may be referred to simply
as an interharmonic.
3.15
interharmonic frequency
any frequency which is not an integ
...