Capacitors for power electronics

IEC 61071:2017 is also available as IEC 61071:2017 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 61071:2017 applies to capacitors for power electronics applications. The operating frequency of the systems in which these capacitors are used is usually up to 15 kHz, while the pulse frequencies may be up to 5 to 10 times the operating frequency. The document distinguishes between AC and DC capacitors which are considered as components when mounted in enclosures. This document covers an extremely wide range of capacitor technologies for numerous applications, e.g. overvoltage protection, DC and filtering, switching circuits, energy storage, auxiliary inverters, etc. This second edition cancels and replaces the first edition published in 2007. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- Introduction of new terms and definitions;
- clarifications for surge discharge test;
- indications for measuring procedure during thermal stability test;
- clarifications for self-healing test;
- clarifications for endurance test;
- clarifications for destruction test;
- update of normative references;
- general editorial review.

Condensateurs pour électronique de puissance

IEC 61071:2017 est disponible sous forme de IEC 61071:2017 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.
IEC 61071:2017 s’applique aux condensateurs pour les applications de l’électronique de puissance. La fréquence de fonctionnement des systèmes utilisant ces condensateurs atteint généralement 15 kHz, mais les fréquences d'impulsions peuvent atteindre 5 à 10 fois la fréquence de fonctionnement. Une distinction est faite dans le présent document entre les condensateurs à courant alternatif et les condensateurs à courant continu qui sont considérés comme des composants lorsqu’ils sont montés dans un boîtier fermé. Le présent document couvre une très grande variété de technologies de condensateurs pour répondre à de nombreuses applications, par exemple la protection contre les surtensions, le filtrage à courant continu et à courant alternatif, les circuits de commutation, le stockage d’énergie à courant continu, les inverseurs auxiliaires, etc Cette deuxième édition annule et remplace la première édition publiée en 2007. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- introduction de nouveaux termes et définitions;
- clarifications des essais de décharge;
- indications sur la procédure de mesure pendant l'essai de stabilité thermique;
- clarifications des essais d'autorégénération;
- clarifications des essais d'endurance;
- clarifications des essais de destruction;
- mise à jour des références normatives;
- révision éditoriale générale
Mots clés: applications de l’électronique de puissance

General Information

Status
Published
Publication Date
16-Aug-2017
Current Stage
PPUB - Publication issued
Start Date
17-Aug-2017
Completion Date
17-Aug-2017
Ref Project

Buy Standard

Standard
IEC 61071:2017 - Capacitors for power electronics
English and French language
94 pages
sale 15% off
Preview
sale 15% off
Preview

Standards Content (sample)

IEC 61071
Edition 2.0 2017-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Capacitors for power electronics
Condensateurs pour électronique de puissance
IEC 61071:2017-08(en-fr)
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2017 IEC, Geneva, Switzerland

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 Central Office Tel.: +41 22 919 02 11
3, rue de Varembé Fax: +41 22 919 03 00
CH-1211 Geneva 20 info@iec.ch
Switzerland www.iec.ch
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 corrigenda or an amendment might have been published.
IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org

The stand-alone application for consulting the entire The world's leading online dictionary of electronic and

bibliographical information on IEC International Standards, electrical terms containing 20 000 terms and definitions in

Technical Specifications, Technical Reports and other English and French, with equivalent terms in 16 additional

documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical

iPad. Vocabulary (IEV) online.

IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary

The advanced search enables to find IEC publications by a 65 000 electrotechnical terminology entries in English and

variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of

committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been

and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and

CISPR.
IEC Just Published - webstore.iec.ch/justpublished

Stay up to date on all new IEC publications. Just Published IEC Customer Service Centre - webstore.iec.ch/csc

details all new publications released. Available online and If you wish to give us your feedback on this publication or

also once a month by email. need further assistance, please contact the Customer Service

Centre: csc@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.
Catalogue IEC - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
Application autonome pour consulter tous les renseignements
Le premier dictionnaire en ligne de termes électroniques et
bibliographiques sur les Normes internationales,
électriques. Il contient 20 000 termes et définitions en anglais
Spécifications techniques, Rapports techniques et autres
et en français, ainsi que les termes équivalents dans 16
documents de l'IEC. Disponible pour PC, Mac OS, tablettes
langues additionnelles. Egalement appelé Vocabulaire
Android et iPad.
Electrotechnique International (IEV) en ligne.
Recherche de publications IEC - www.iec.ch/searchpub
Glossaire IEC - std.iec.ch/glossary
65 000 entrées terminologiques électrotechniques, en anglais
La recherche avancée permet de trouver des publications IEC

en utilisant différents critères (numéro de référence, texte, et en français, extraites des articles Termes et Définitions des

comité d’études,…). Elle donne aussi des informations sur les publications IEC parues depuis 2002. Plus certaines entrées

projets et les publications remplacées ou retirées. antérieures extraites des publications des CE 37, 77, 86 et

CISPR de l'IEC.
IEC Just Published - webstore.iec.ch/justpublished
Service Clients - webstore.iec.ch/csc
Restez informé sur les nouvelles publications IEC. Just

Published détaille les nouvelles publications parues. Si vous désirez nous donner des commentaires sur cette

Disponible en ligne et aussi une fois par mois par email. publication ou si vous avez des questions contactez-nous:

csc@iec.ch.
---------------------- Page: 2 ----------------------
IEC 61071
Edition 2.0 2017-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Capacitors for power electronics
Condensateurs pour électronique de puissance
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 31.060.70 ISBN 978-2-8322-4647-4

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 61071:2017 © IEC 2017
CONTENTS

FOREWORD ........................................................................................................................... 5

1 Scope .............................................................................................................................. 7

2 Normative references ...................................................................................................... 7

3 Terms and definitions ...................................................................................................... 8

4 Service conditions ......................................................................................................... 14

4.1 Normal service conditions ..................................................................................... 14

4.1.1 General ......................................................................................................... 14

4.1.2 Altitude .......................................................................................................... 14

4.1.3 Operating temperature (θ ) ....................................................................... 14

max

4.1.4 Operating temperature with forced cooling ..................................................... 14

4.2 Unusual service conditions ................................................................................... 14

5 Quality requirements and tests ...................................................................................... 15

5.1 Test requirements ................................................................................................. 15

5.1.1 General ......................................................................................................... 15

5.1.2 Test conditions .............................................................................................. 15

5.2 Classification of tests ............................................................................................ 15

5.2.1 General ......................................................................................................... 15

5.2.2 Routine tests ................................................................................................. 15

5.2.3 Type tests ...................................................................................................... 16

5.3 Capacitance and tan δ measurements (routine test) .............................................. 16

5.3.1 Measuring procedure ..................................................................................... 16

5.3.2 Capacitance tolerances ................................................................................. 17

5.3.3 Loss requirements (tan δ) .............................................................................. 17

5.4 Measurement of the tangent of the loss angle (tan δ) of a capacitor (type test)

............................................................................................................................. 17

5.4.1 Measurements ............................................................................................... 17

5.4.2 Loss requirements ......................................................................................... 17

5.5 Voltage test between terminals ............................................................................. 17

5.5.1 General ......................................................................................................... 17

5.5.2 Routine test ................................................................................................... 17

5.5.3 Type test ....................................................................................................... 18

5.6 AC voltage test between terminals and case ......................................................... 18

5.6.1 Routine test ................................................................................................... 18

5.6.2 Type test ....................................................................................................... 18

5.7 Test of internal discharge device ........................................................................... 19

5.8 Sealing test ........................................................................................................... 19

5.9 Surge discharge test ............................................................................................. 19

5.10 Thermal stability test ............................................................................................. 20

5.10.1 General ......................................................................................................... 20

5.10.2 Measuring procedure ..................................................................................... 20

5.11 Self-healing test .................................................................................................... 21

5.12 Resonance frequency measurement ..................................................................... 21

5.13 Environmental testing ........................................................................................... 21

5.13.1 Change of temperature .................................................................................. 21

5.13.2 Damp heat, steady state ................................................................................ 22

5.14 Mechanical testing ................................................................................................ 22

5.14.1 Mechanical tests of terminals ......................................................................... 22

---------------------- Page: 4 ----------------------
IEC 61071:2017 © IEC 2017 – 3 –

5.14.2 External inspection ........................................................................................ 22

5.14.3 Vibration and shocks ..................................................................................... 22

5.15 Endurance test ...................................................................................................... 23

5.15.1 General ......................................................................................................... 23

5.15.2 Conditioning of the units before the test ......................................................... 23

5.15.3 Initial capacitance and loss factor measurements .......................................... 23

5.15.4 Endurance test .............................................................................................. 23

5.15.5 Final capacitance and tan δ measurement ..................................................... 24

5.15.6 Acceptance criteria ........................................................................................ 24

5.16 Destruction test ..................................................................................................... 24

5.16.1 General ......................................................................................................... 24

5.16.2 Test sequence for a.c. capacitors .................................................................. 25

5.16.3 Test sequence for d.c. capacitors .................................................................. 27

5.17 Disconnecting test on internal fuses ...................................................................... 29

5.17.1 General ......................................................................................................... 29

5.17.2 Disconnecting requirements ........................................................................... 30

5.17.3 Withstand requirements ................................................................................. 30

5.17.4 Test procedure .............................................................................................. 30

5.17.5 Capacitance measurement ............................................................................ 31

5.17.6 Visual checking ............................................................................................. 31

5.17.7 Voltage test ................................................................................................... 31

6 Overloads ...................................................................................................................... 32

6.1 Maximum permissible voltages ............................................................................. 32

7 Safety requirements ...................................................................................................... 32

7.1 Discharge device .................................................................................................. 32

7.2 Case connections ................................................................................................. 32

7.3 Protection of the environment ............................................................................... 33

7.4 Other safety requirements ..................................................................................... 33

8 Markings........................................................................................................................ 33

8.1 Marking of the units – Rating plate ........................................................................ 33

9 Guidance on installation and operation .......................................................................... 34

9.1 General ................................................................................................................. 34

9.2 Choice of rated voltage ......................................................................................... 34

9.3 Operating temperature .......................................................................................... 34

9.3.1 General ......................................................................................................... 34

9.3.2 Installation ..................................................................................................... 35

9.3.3 Unusual cooling conditions ............................................................................ 35

9.4 Special service conditions ..................................................................................... 35

9.5 Overvoltages ........................................................................................................ 36

9.6 Overcurrents ......................................................................................................... 36

9.7 Switching and protective devices .......................................................................... 36

9.8 Choice of creepage distance and clearance .......................................................... 36

9.8.1 Creepage distance ......................................................................................... 36

9.8.2 Air clearances................................................................................................ 36

9.9 Connections .......................................................................................................... 37

9.10 Parallel connections of capacitors ......................................................................... 37

9.11 Series connections of capacitors ........................................................................... 37

9.12 Magnetic losses and eddy currents ....................................................................... 37

---------------------- Page: 5 ----------------------
– 4 – IEC 61071:2017 © IEC 2017

9.13 Guidance for internal fuse and disconnector protection in capacitors .................... 37

9.14 Guidance for unprotected capacitors ..................................................................... 38

Annex A (informative) Waveforms ........................................................................................ 39

Annex B (normative) Operational limits of capacitors with sinusoidal voltages as a

function of frequency and at maximum temperature (θmax)................................................... 41

Annex C (normative) Resonance frequency measuring methods – Examples ....................... 43

C.1 Method 1............................................................................................................... 43

C.2 Method 2............................................................................................................... 44

Bibliography .......................................................................................................................... 45

Figure 1 – Destruction test arrangement ............................................................................... 26

Figure 2 – N source DC – Type 1 .......................................................................................... 28

Figure 3 – N source DC – Type 2 .......................................................................................... 29

Figure A.1 – Example of waveforms and their circuits ........................................................... 40

Figure B.1 – Supply conditions ............................................................................................. 41

Figure C.1 – Measuring circuit .............................................................................................. 43

Figure C.2 – Relation between the voltage across the capacitor and the supply

frequency .............................................................................................................................. 43

Figure C.3 – Discharge current wave shape .......................................................................... 44

Table 1 – Test voltage between terminals ............................................................................. 17

Table 2 – Testing the robustness of terminals ....................................................................... 22

Table 3 – Endurance test ...................................................................................................... 24

Table 4 – Destruction test as a function of type of safety system .......................................... 25

Table 5 – Maximum permissible voltages .............................................................................. 32

---------------------- Page: 6 ----------------------
IEC 61071:2017 © IEC 2017 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CAPACITORS FOR POWER ELECTRONICS
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) 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 61071 has been prepared by IEC technical committee 33: Power

capacitors and their applications.

This second edition cancels and replaces the first edition published in 2007. This edition

constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous

edition:
• Introduction of new terms and definitions
• clarifications for surge discharge test
• indications for measuring procedure during thermal stability test
• clarifications for self-healing test
• clarifications for endurance test
• clarifications for destruction test
• update of normative references
• general editorial review
---------------------- Page: 7 ----------------------
– 6 – IEC 61071:2017 © IEC 2017
The text of this International Standard is based on the following documents:
FDIS Report on voting
33/610/FDIS 33/612/RVD

Full information on the voting for the approval of this International Standard can be found in

the report on voting indicated in the above table.

This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to

the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------------- Page: 8 ----------------------
IEC 61071:2017 © IEC 2017 – 7 –
CAPACITORS FOR POWER ELECTRONICS
1 Scope

This International Standard applies to capacitors for power electronics applications.

The operating frequency of the systems in which these capacitors are used is usually up to

15 kHz, while the pulse frequencies may be up to 5 to 10 times the operating frequency.

The document distinguishes between AC and DC capacitors which are considered as
components when mounted in enclosures.

This document covers an extremely wide range of capacitor technologies for numerous

applications, e.g. overvoltage protection, DC and filtering, switching circuits, energy storage,

auxiliary inverters, etc.
The following are excluded from this document:

• capacitors for induction heat-generating plants operating at frequencies range up to

50 kHz (see IEC 60110-1 and IEC 60110-2);

• capacitors for motor applications and the like (see IEC 60252-1 and IEC 60252 -2);

• capacitors to be used in circuits for blocking one or more harmonics in power supply

networks;

• small AC capacitors as used for fluorescent and discharge lamps (see IEC 61048 and

IEC 61049);
• capacitors for suppression of radio interference (see IEC 60384-14);

• shunt capacitors for AC power systems having a rated voltage above 1 000 V (see the

IEC 60871 standards);

• shunt power capacitors of the self-healing type for AC systems having a rated voltage up

to and including 1 000 V (see IEC 60831-1 and IEC 60831-2);

• shunt power capacitor of the non-self-healing type for AC systems having a rated voltage

up to and including 1 000 V (see the IEC 60931 standards);
• electronic capacitors not used in power circuits;
• series capacitors for power systems (see IEC 60143);
• coupling capacitors and capacitors dividers (see IEC 60358);
• capacitors for microwave ovens (see IEC 61270-1);
• capacitors for railway applications (see IEC 61881).
Examples of applications are given in 9.1.
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 60068-2-6, Environmental testing – Part 2-6: Tests – Test Fc: Vibration (sinusoidal)

---------------------- Page: 9 ----------------------
– 8 – IEC 61071:2017 © IEC 2017

IEC 60068-2-14, Environmental testing – Part 2-14: Tests – Test N: Change of temperature

IEC 60068-2-20, Environmental testing – Part 2-20: Tests – Test T: Test methods for

solderability and resistance to soldering heat of devices with leads
IEC 60068-2-21, Environmental testing – Part 2-21: Tests – Test U: Robustness of
terminations and integral mounting devices

IEC 60068-2-78, Environmental testing – Part 2-78: Tests – Test Cab: Damp heat, steady

state
IEC 60269-1, Low-voltage fuses – Part 1: General requirements

IEC 60664-1, Insulation coordination for equipment within low-voltage systems – Part 1:

Principles, requirements and tests

IEC 60695-2-11, Fire hazard testing – Part 2-11: Glowing/hot-wire based test methods –

Glow-wire flammability test method for end-products (GWEPT)

IEC 60695-2-12, Fire hazard testing – Part 2-12: Glowing/hot-wire based test methods –

Glow-wire flammability index (GWFI) test method for materials
IEC 60947-1:2007, Low-voltage switchgear and controlgear – Part 1: General rules
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following

addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
capacitor element (or element)
device consisting essentially of two electrodes separated by a dielectric
[SOURCE: IEC 60050-436:1990, 436-01-03]
3.2
capacitor unit (or unit)

assembly of one or more capacitor elements in the same container with terminals brought out

[SOURCE: IEC 60050-436:1990
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.