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4:2004
STANDARD
april 2004
Electromagnetic compatibility (EMC) - Part 3-4: Limits - Limitation of emission of
harmonic currents in low-voltage power supply systems for equipment with rated
current greater than 16 A
ICS 33.100.10 Referenčna številka
SIST-TP IEC/TR2 61000-3-4:2004(en)
© Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno
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RAPPORT
CEI
TECHNIQUE – TYPE 2
IEC
61000-3-4
TECHNICAL
Première édition
REPORT – TYPE 2
First edition
1998-10
Compatibilité électromagnétique (CEM) –
Partie 3-4:
Limites – Limitation des émissions de courants
harmoniques dans les réseaux basse tension
pour les matériels ayant un courant assigné
supérieur à 16 A
Electromagnetic compatibility (EMC) –
Part 3-4:
Limits – Limitation of emission of harmonic
currents in low-voltage power supply systems
for equipment with rated current
greater than 16 A
IEC 1998 Droits de reproduction réservés Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in
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procédé, électronique ou mécanique, y compris la photo- including photocopying and microfilm, without permission in
copie et les microfilms, sans l'accord écrit de l'éditeur. writing from the publisher.
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CODE PRIX
Commission Electrotechnique Internationale
PRICE CODE N
International Electrotechnical Commission
Pour prix, voir catalogue en vigueur
For price, see current catalogue
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61000-3-4 © IEC:1998 – 3 –
CONTENTS
Page
FOREWORD . 5
INTRODUCTION . 9
Clause
1 Scope . 11
2 Normative references . 13
3 Definitions. 13
4 General requirements. 17
4.1 Control methods. 17
4.2 Harmonic current measurement . 17
4.3 Equipment consisting of several self-contained items . 19
5 Connection procedures for equipment . 19
5.1 Stage 1: Simplified connection . 19
5.2 Stage 2: Connection based on network and equipment data . 21
5.3 Stage 3: Connection based on the consumer's agreed power. 23
6 Product documentation. 23
6.1 General. 23
6.2 Stage 1 . 23
6.3 Stage 2 . 23
6.4 Stage 3 . 25
7 Methods for type tests . 25
7.1 Requirements for measurement circuit . 25
7.2 Requirements for simulation. 27
7.3 Test and simulation conditions . 29
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61000-3-4 © IEC:1998 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
––––––––––
ELECTROMAGNETIC COMPATIBILITY (EMC) –
Part 3-4: Limits –
Limitation of emission of harmonic currents
in low-voltage power supply systems
for equipment with rated current greater than 16 A
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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. The 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 the 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 National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical reports or guides and they are accepted by the National Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
The main task of IEC technical committees is to prepare International Standards. In
exceptional circumstances, a technical committee may propose the publication of a technical
report of one of the following types:
– type 1, when the required support cannot be obtained for the publication of an International
Standard, despite repeated efforts;
– type 2, when the subject is still under technical development or where for any other reason
there is the future but not immediate possibility of an agreement on an International
Standard;
– type 3, when a technical committee has collected data of a different kind from that which is
normally published as an International Standard, for example "state of the art".
Technical reports of types 1 and 2 are subject to review within three years of publication to
decide whether they can be transformed into International Standards. Technical reports of type
3 do not necessarily have to be reviewed until the data they provide are considered to be no
longer valid or useful.
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61000-3-4 © IEC:1998 – 7 –
IEC 61000-3-4, which is a technical report of type 2, has been prepared by subcommittee 77A:
Low frequency phenomena, of IEC technical committee 77: Electromagnetic compatibility.
The text of this technical report is based on the following documents:
CDV Report on voting
77A/169/CDV 77A/227/RVC
Full information on the voting for the approval of this technical report can be found in the report
on voting indicated in the above table.
This document is being issued in the technical report (type 2) series of publications (according
to subclause G.3.2.2 of part 1 of the ISO/IEC Directives) as a "prospective standard for
provisional application" in the field of electromagnetic compatibility because there is an urgent
need for guidance on how standards in this field should be used to meet an identified need.
This document is not to be regarded as an "International Standard". It is proposed for
provisional application so that information and experience of its use in practice may be
gathered. Comments on the content of this document should be sent to the IEC Central Office.
A review of this technical report (type 2) will be carried out not later than three years after its
publication with the options of: extension for another three years; conversion into an
International Standard; or withdrawal.
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61000-3-4 © IEC:1998 – 9 –
INTRODUCTION
This technical report is part of the IEC 61000 series, 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
technical reports, some of which have already been published as sections. Others will be
published with the part number followed by a dash and a second number identifying the
subdivision (example: 61000-6-1).
This part is a technical report type 2 which gives emission limits for harmonic currents from
equipment having an input current exceeding 16 A per phase.
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61000-3-4 © IEC:1998 – 11 –
ELECTROMAGNETIC COMPATIBILITY (EMC) –
Part 3-4: Limits –
Limitation of emission of harmonic currents
in low-voltage power supply systems
for equipment with rated current greater than 16 A
1 Scope
This part of IEC 61000 deals with the emission of disturbances due to harmonics.
The recommendations of this technical report are applicable to electrical and electronic
equipment with a rated input current exceeding 16 A per phase and intended to be connected
to public low-voltage a.c. distribution systems of the following types:
– nominal voltage up to 240 V, single-phase, two or three wires;
– nominal voltage up to 600 V, three-phase, three or four wires;
– nominal frequency 50 Hz or 60 Hz.
Other distribution systems are excluded.
Tests according to this report are type tests of complete pieces of equipment, for example a
speed variable fan, and not of components, for example a converter.
Connection of this equipment to the supply generally requires special agreement between the
supply authority and the consumer. This consent will depend upon several factors including the
expected levels of disturbance caused by the equipment and the actual situation at the
connection point to the power supply system.
These recommendations specify the information required to enable a supply authority to
assess equipment regarding harmonic disturbance and to decide whether or not the equipment
is acceptable for connection with regard to the harmonic distortion aspect.
NOTE 1 – For these types of equipment only general recommendations on assessment of disturbances can be
given. There is no guarantee that the connection of equipment complying with these recommendations will be
allowed in all cases, as the consent to connect equipment to the supply depends on the level of disturbance caused
by the equipment and the load conditions in the network.
NOTE 2 – These recommendations can also be applied to equipment with a lower rated input current but requiring
special consent of the supply authority (see IEC 61000-3-2).
NOTE 3 – These recommendations are not applicable to active filters.
Guidance is given on:
a) required short-circuit power for harmonics emitting equipment tested or simulated under
specified conditions;
b) methods for type tests or simulations.
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61000-3-4 © IEC:1998 – 13 –
2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this part of IEC 61000. At the time of publication, the editions indicated
were valid. All normative documents are subject to revision, and parties to agreements based
on this part of IEC 61000 are encouraged to investigate the possibility of applying the most
recent editions of the normative documents indicated below. Members of IEC and ISO maintain
registers of currently valid International Standards.
IEC 60050(161):1990, International Electrotechnical Vocabulary (IEV) – Chapter 161:
Electromagnetic compatibility
IEC 61000-2-1:1990, Electromagnetic compatibility (EMC) – Part 2: Environment – Section 1:
Description of the environment – Electromagnetic environment for low-frequency conducted
disturbances and signalling in public power supply systems
IEC 61000-2-2:1990, Electromagnetic compatibility (EMC) – Part 2: Environment – Section 2:
Compatibility levels for low-frequency conducted disturbances and signalling in public low-
voltage power supply systems
IEC 61000-3-2:1995, Electromagnetic compatibility (EMC) – Part 3: Limits – Section 2: Limits
for harmonic current emissions (equipment input current ≤ 16 A per phase)
IEC 61000-3-5:1994, Electromagnetic compatibility (EMC) – Part 3: Limits – Section 5:
Limitation of voltage fluctuations and flicker in low-voltage power supply systems for equipment
with rated current greater than 16 A
IEC 61000-4-7:1991, Electromagnetic compatibility (EMC) – Part 4: Testing and measurement
techniques – Section 7: General guide on harmonics and interharmonics measurements and
instrumentation, for power supply systems and equipment connected thereto
3 Definitions
Definitions are given in IEC 60050(161). For the purpose of this technical report, the following
definitions also apply.
3.1
1)
total harmonic distortion (THD)
ratio of the r.m.s value of the harmonics (in this context harmonic currents I of the order n) to
n
the r.m.s value of the fundamental, viz.
2
40
I
n
THD =
∑
I
1
n=2
———————
1)
This definition has been chosen in accordance with the relevant standards IEC 61000-2-1 and IEC 61000-2-2.
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61000-3-4 © IEC:1998 – 15 –
3.2
partial weighted harmonic distortion (PWHD)
ratio of the r.m.s value of a selected group of higher order harmonics (here beginning from the
fourteenth harmonic), weighted with the harmonic order n, to the r.m.s value of the
fundamental:
2
40
I
n
PWHD= n
∑
I
1
n=14
NOTE – The partial weighted harmonic distortion is employed in order to ensure that the effects of the higher order
harmonic currents on the results are reduced sufficiently and individual limits need not be specified.
3.3
point of common coupling (PCC)
point in the public network which is closest to the consumer concerned and to which
...