Plastic films for electrical purposes - Part 3: Specifications for individual materials - Sheet 1: Biaxially oriented polypropylene (PP) film for capacitors (IEC 60674-3-1:2021)

This sheet of IEC 60674-3 gives the requirements for biaxially oriented polypropylene film
having a smooth or rough surface, corona treated when required for vacuum metallization. The
films are for use as dielectric in capacitors.
Materials which conform to this specification meet established levels of performance. However,
the selection of a material by a user for a specific application is based on the actual
requirements necessary for adequate performance in that application and not based on this
specification alone.
Safety warning: It is the responsibility of the user of the methods contained or referred to in this
document to ensure that they are used in a safe manner

Isolierfolien für elektrotechnische Zwecke - Teil 3: Anforderungen für einzelne Werkstoffe - Blatt 1: Biaxial orientierte Polypropylen-(PP)-Folien für Kondensatoren (IEC 60674-3-1:2021)

Films plastiques à usages électriques - Partie 3: Spécifications pour matériaux particuliers - Feuille 1: Films de polypropylène biorientés (PP) pour condensateurs (IEC 60674-3-1:2021)

IEC 60674-3-1:2021 est disponible sous forme de IEC 60674-3-1:2021 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.
L'IEC 60674-3-1:2021 donne les exigences relatives aux films de polypropylène biorienté à surface lisse ou rugueuse, avec traitement par effet couronne, si cela est exigé, pour la métallisation sous vide. Les films sont utilisés comme diélectrique dans les condensateurs. Les matériaux conformes à la présente spécification satisfont à des niveaux établis de performance. Toutefois, le choix d’un matériau par un utilisateur pour une application spécifique repose sur les exigences réelles nécessaires pour obtenir des performances adéquates de l’application concernée, et non sur la seule présente spécification. Mise en garde relative à la sécurité: Il incombe à l’utilisateur des méthodes contenues ou citées en référence dans le présent document d’assurer qu’elles sont utilisées d’une manière sûre. Cette deuxième édition annule et remplace la première édition parue en 1998 ainsi que l’Amendement 1:2011. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- ce document a été entièrement revu sur le plan rédactionnel et technique et inclus dans les normes de la série IEC 60674;
- les méthodes d’essai ont été mises à jour pour refléter l’état actuel de la technique.

Plastične folije za električne namene - 3. del: Specifikacije za posamezne materiale - 1. list: Dvoosno orientirana polipropilenska folija za kondenzatorje (IEC 60674-3-1:2021)

General Information

Status
Published
Publication Date
13-Oct-2021
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
07-Oct-2021
Due Date
12-Dec-2021
Completion Date
14-Oct-2021

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Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN IEC 60674-3-1:2021
01-december-2021
Nadomešča:
SIST EN 60674-3-1:2001
SIST EN 60674-3-1:2001/A1:2012

Plastične folije za električne namene - 3. del: Specifikacije za posamezne materiale

- 1. list: Dvoosno orientirana polipropilenska folija za kondenzatorje (IEC 60674-3-

1:2021)

Plastic films for electrical purposes - Part 3: Specifications for individual materials - Sheet

1: Biaxially oriented polypropylene (PP) film for capacitors (IEC 60674-3-1:2021)

Isolierfolien für elektrotechnische Zwecke - Teil 3: Anforderungen für einzelne Werkstoffe

- Blatt 1: Biaxial orientierte Polypropylen-(PP)-Folien für Kondensatoren (IEC 60674-3-

1:2021)
Films plastiques à usages électriques - Partie 3: Spécifications pour matériaux

particuliers - Feuille 1: Films de polypropylène biorientés (PP) pour condensateurs (IEC

60674-3-1:2021)
Ta slovenski standard je istoveten z: EN IEC 60674-3-1:2021
ICS:
29.035.20 Plastični in gumeni izolacijski Plastics and rubber insulating
materiali materials
83.140.10 Filmi in folije Films and sheets
SIST EN IEC 60674-3-1:2021 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN IEC 60674-3-1:2021
---------------------- Page: 2 ----------------------
SIST EN IEC 60674-3-1:2021
EUROPEAN STANDARD EN IEC 60674-3-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2021
ICS 29.035.20 Supersedes EN 60674-3-1:1998 and all of its
amendments and corrigenda (if any)
English Version
Plastic films for electrical purposes - Part 3: Specifications for
individual materials - Sheet 1: Biaxially oriented polypropylene
(PP) film for capacitors
(IEC 60674-3-1:2021)

Films plastiques à usages électriques - Partie 3: Isolierfolien für elektrotechnische Zwecke - Teil 3:

Spécifications pour matériaux particuliers - Feuille 1: Films Anforderungen für einzelne Werkstoffe - Blatt 1: Biaxial

de polypropylène biorienté (PP) pour condensateurs orientierte Polypropylen-(PP)-Folien für Kondensatoren

(IEC 60674-3-1:2021) (IEC 60674-3-1:2021)

This European Standard was approved by CENELEC on 2021-09-29. 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,

Turkey 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

© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 60674-3-1:2021 E
---------------------- Page: 3 ----------------------
SIST EN IEC 60674-3-1:2021
EN IEC 60674-3-1:2021 (E)
European foreword

The text of document 15/909/CDV, future edition 2 of IEC 60674-3-1, prepared by IEC/TC 15 “Solid

electrical insulating materials” was submitted to the IEC-CENELEC parallel vote and approved by

CENELEC as EN IEC 60674-3-1:2021.
The following dates are fixed:

• latest date by which the document has to be implemented at national (dop) 2022–06–29

level by publication of an identical national standard or by endorsement

• latest date by which the national standards conflicting with the (dow) 2024–09–29

document have to be withdrawn

This document supersedes EN 60674-3-1:1998 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 60674-3-1:2021 was approved by CENELEC as a

European Standard without any modification.
---------------------- Page: 4 ----------------------
SIST EN IEC 60674-3-1:2021
EN IEC 60674-3-1:2021 (E)
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.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60674-1 1980 Specification for plastic films for electrical EN 60674-1 1998
purposes. Part 1: Definitions and general
requirements
IEC 60674-2 2016 Specification for plastic films for electrical EN 60674-2 2017
purposes - Part 2: Methods of test
---------------------- Page: 5 ----------------------
SIST EN IEC 60674-3-1:2021
---------------------- Page: 6 ----------------------
SIST EN IEC 60674-3-1:2021
IEC 60674-3-1
Edition 2.0 2021-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Plastic films for electrical purposes –
Part 3: Specifications for individual materials – Sheet 1: Biaxially oriented
polypropylene (PP) films for capacitors
Films plastiques à usages électriques –
Partie 3: Spécifications pour matériaux particuliers – Feuille 1: Films de
polypropylène biorienté (PP) pour condensateurs
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.035.20 ISBN 978-2-8322-1017-4

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: 7 ----------------------
SIST EN IEC 60674-3-1:2021
– 2 – IEC 60674-3-1:2021 © IEC 2021
CONTENTS

FOREWORD ......................................................................................................................... 3

INTRODUCTION ................................................................................................................... 5

1 Scope ............................................................................................................................ 6

2 Normative references..................................................................................................... 6

3 Terms and definitions .................................................................................................... 6

4 Classification ................................................................................................................. 6

5 Designation ................................................................................................................... 7

6 General requirements .................................................................................................... 7

7 Dimensions ................................................................................................................... 7

7.1 Thickness ............................................................................................................. 7

7.2 Width .................................................................................................................... 8

7.3 Length/diameter .................................................................................................... 8

8 Properties...................................................................................................................... 8

8.1 Physical properties ................................................................................................ 8

8.2 Electric strength (DC test) ..................................................................................... 9

8.3 Electrical weak spots ............................................................................................. 9

8.4 Thermal endurance ............................................................................................. 10

8.5 Wetting tension (types 1b + 1c, 2b + 2c and 3b + 3c only) .................................... 10

8.6 Liquid absorption ................................................................................................. 10

8.7 Compatibility with impregnants ............................................................................ 10

8.8 Dissipation factor under impregnated conditions .................................................. 10

8.9 Space factor ....................................................................................................... 11

9 Roll characteristics ...................................................................................................... 11

9.1 Windability .......................................................................................................... 11

9.2 Joins ................................................................................................................... 11

9.3 Roll width (overall width) ..................................................................................... 12

9.4 Core ................................................................................................................... 12

9.5 Labelling ............................................................................................................. 12

Bibliography ....................................................................................................................... 13

Table 1 – Physical properties ................................................................................................ 8

Table 2 – Electric strength (DC test) for types 1, 2 and 3 ....................................................... 9

Table 3 – Electrical weak spots for types 1, 2 and 3 ............................................................. 10

Table 4 – Maximum number of joins within a roll (types 1, 2 and 3) ...................................... 11

---------------------- Page: 8 ----------------------
SIST EN IEC 60674-3-1:2021
IEC 60674-3-1:2021 © IEC 2021 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
PLASTIC FILMS FOR ELECTRICAL PURPOSES –
Part 3: Specifications for individual materials –
Sheet 1: Biaxially oriented polypropylene (PP) films for capacitors
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.

IEC 60674-3-1 has been prepared by IEC technical committee 15: Solid electrical insulating

materials.
This second edition cancels and replaces the first edition published in 1998 and
Amendment 1:2011. This edition constitutes a technical revision.

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

edition:
a) this document has been completely revised editorial
...

SLOVENSKI STANDARD
SIST EN IEC 60674-3-1:2021
01-december-2021
Nadomešča:
SIST EN 60674-3-1:2001
SIST EN 60674-3-1:2001/A1:2012

Plastične folije za električne namene - 3. del: Specifikacije za posamezne materiale

- 1. list: Dvoosno orientirana polipropilenska folija za kondenzatorje (IEC 60674-3-

1:2021)

Plastic films for electrical purposes - Part 3: Specifications for individual materials - Sheet

1: Biaxially oriented polypropylene (PP) film for capacitors (IEC 60674-3-1:2021)

Isolierfolien für elektrotechnische Zwecke - Teil 3: Anforderungen für einzelne Werkstoffe

- Blatt 1: Biaxial orientierte Polypropylen-(PP)-Folien für Kondensatoren (IEC 60674-3-

1:2021)
Films plastiques à usages électriques - Partie 3: Spécifications pour matériaux

particuliers - Feuille 1: Films de polypropylène biorientés (PP) pour condensateurs (IEC

60674-3-1:2021)
Ta slovenski standard je istoveten z: EN IEC 60674-3-1:2021
ICS:
29.035.20 Plastični in gumeni izolacijski Plastics and rubber insulating
materiali materials
SIST EN IEC 60674-3-1:2021 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN IEC 60674-3-1:2021
---------------------- Page: 2 ----------------------
SIST EN IEC 60674-3-1:2021
EUROPEAN STANDARD EN IEC 60674-3-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2021
ICS 29.035.20 Supersedes EN 60674-3-1:1998 and all of its
amendments and corrigenda (if any)
English Version
Plastic films for electrical purposes - Part 3: Specifications for
individual materials - Sheet 1: Biaxially oriented polypropylene
(PP) film for capacitors
(IEC 60674-3-1:2021)

Films plastiques à usages électriques - Partie 3: Isolierfolien für elektrotechnische Zwecke - Teil 3:

Spécifications pour matériaux particuliers - Feuille 1: Films Anforderungen für einzelne Werkstoffe - Blatt 1: Biaxial

de polypropylène biorienté (PP) pour condensateurs orientierte Polypropylen-(PP)-Folien für Kondensatoren

(IEC 60674-3-1:2021) (IEC 60674-3-1:2021)

This European Standard was approved by CENELEC on 2021-09-29. 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,

Turkey 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

© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 60674-3-1:2021 E
---------------------- Page: 3 ----------------------
SIST EN IEC 60674-3-1:2021
EN IEC 60674-3-1:2021 (E)
European foreword

The text of document 15/909/CDV, future edition 2 of IEC 60674-3-1, prepared by IEC/TC 15 “Solid

electrical insulating materials” was submitted to the IEC-CENELEC parallel vote and approved by

CENELEC as EN IEC 60674-3-1:2021.
The following dates are fixed:

• latest date by which the document has to be implemented at national (dop) 2022–06–29

level by publication of an identical national standard or by endorsement

• latest date by which the national standards conflicting with the (dow) 2024–09–29

document have to be withdrawn

This document supersedes EN 60674-3-1:1998 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 60674-3-1:2021 was approved by CENELEC as a

European Standard without any modification.
---------------------- Page: 4 ----------------------
SIST EN IEC 60674-3-1:2021
EN IEC 60674-3-1:2021 (E)
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.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60674-1 1980 Specification for plastic films for electrical EN 60674-1 1998
purposes. Part 1: Definitions and general
requirements
IEC 60674-2 2016 Specification for plastic films for electrical EN 60674-2 2017
purposes - Part 2: Methods of test
---------------------- Page: 5 ----------------------
SIST EN IEC 60674-3-1:2021
---------------------- Page: 6 ----------------------
SIST EN IEC 60674-3-1:2021
IEC 60674-3-1
Edition 2.0 2021-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Plastic films for electrical purposes –
Part 3: Specifications for individual materials – Sheet 1: Biaxially oriented
polypropylene (PP) films for capacitors
Films plastiques à usages électriques –
Partie 3: Spécifications pour matériaux particuliers – Feuille 1: Films de
polypropylène biorienté (PP) pour condensateurs
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.035.20 ISBN 978-2-8322-1017-4

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: 7 ----------------------
SIST EN IEC 60674-3-1:2021
– 2 – IEC 60674-3-1:2021 © IEC 2021
CONTENTS

FOREWORD ......................................................................................................................... 3

INTRODUCTION ................................................................................................................... 5

1 Scope ............................................................................................................................ 6

2 Normative references..................................................................................................... 6

3 Terms and definitions .................................................................................................... 6

4 Classification ................................................................................................................. 6

5 Designation ................................................................................................................... 7

6 General requirements .................................................................................................... 7

7 Dimensions ................................................................................................................... 7

7.1 Thickness ............................................................................................................. 7

7.2 Width .................................................................................................................... 8

7.3 Length/diameter .................................................................................................... 8

8 Properties...................................................................................................................... 8

8.1 Physical properties ................................................................................................ 8

8.2 Electric strength (DC test) ..................................................................................... 9

8.3 Electrical weak spots ............................................................................................. 9

8.4 Thermal endurance ............................................................................................. 10

8.5 Wetting tension (types 1b + 1c, 2b + 2c and 3b + 3c only) .................................... 10

8.6 Liquid absorption ................................................................................................. 10

8.7 Compatibility with impregnants ............................................................................ 10

8.8 Dissipation factor under impregnated conditions .................................................. 10

8.9 Space factor ....................................................................................................... 11

9 Roll characteristics ...................................................................................................... 11

9.1 Windability .......................................................................................................... 11

9.2 Joins ................................................................................................................... 11

9.3 Roll width (overall width) ..................................................................................... 12

9.4 Core ................................................................................................................... 12

9.5 Labelling ............................................................................................................. 12

Bibliography ....................................................................................................................... 13

Table 1 – Physical properties ................................................................................................ 8

Table 2 – Electric strength (DC test) for types 1, 2 and 3 ....................................................... 9

Table 3 – Electrical weak spots for types 1, 2 and 3 ............................................................. 10

Table 4 – Maximum number of joins within a roll (types 1, 2 and 3) ...................................... 11

---------------------- Page: 8 ----------------------
SIST EN IEC 60674-3-1:2021
IEC 60674-3-1:2021 © IEC 2021 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
PLASTIC FILMS FOR ELECTRICAL PURPOSES –
Part 3: Specifications for individual materials –
Sheet 1: Biaxially oriented polypropylene (PP) films for capacitors
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.

IEC 60674-3-1 has been prepared by IEC technical committee 15: Solid electrical insulating

materials.
This second edition cancels and replaces the first edition published in 1998 and
Amendment 1:2011. This edition constitutes a technical revision.

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

edition:
a) this document has been completely revised editorially and technically and
...

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