IEC 60626-1:2023

Combined flexible materials for electrical insulation - Part 1: Definitions and general requirements

IEC 60626-1:2023 contains the definitions related to and the general requirements to be fulfilled by combined flexible materials for electrical insulation. This document does not include mica papers used as a primary component, which are covered by the IEC 60371 series, but insulation materials based on mica paper can be used as component of a combined flexible material. Materials which conform to this specification meet established levels of performance. However, the selection of 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. This fourth edition cancels and replaces the third edition published in 2009. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) the materials available for use within this series of standards have been updated;
b) a framework has been created to allow test methods beyond those used for quality control specifications to allow for testing for qualification purposes.

Matériaux combinés souples destinés à l'isolement électrique - Partie 1: Définitions et exigences générales

L'IEC 60626-1:2023 contient les définitions et les exigences générales applicables aux matériaux combinés souples destinés à l'isolement électrique. Le présent document ne concerne pas les différents types de papiers de mica utilisés en tant que composantes primaires, couverts par la série IEC 60371, mais les isolants à base de papier de mica peuvent être utilisés comme constituants de matériaux combinés souples. Les matériaux conformes à cette spécification satisfont aux niveaux de performances établis. Cependant, le choix d’un matériau par un utilisateur et pour une application spécifique est fondé sur les exigences réelles nécessaires pour obtenir des performances satisfaisantes lorsqu’il est utilisé dans cette application, et non fondé sur cette seule spécification. Cette quatrième édition annule et remplace la troisième édition parue en 2009. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) les matériaux disponibles, destinés à être utilisés dans cette série de normes, ont été mis à jour;
b) un cadre a été créé, permettant de recourir à des méthodes d'essai en dehors de celles liées aux spécifications du contrôle qualité pour conduire des essais aux fins de la qualification.

General Information

• Status: Published
• Publication Date: 15-Aug-2023
• ICS: 29.035.01 - Insulating materials in general
• Technical Committee: TC 15 - Solid electrical insulating materials
• Drafting Committee: MT 10 - TC 15/MT 10
• Current Stage: PPUB - Publication issued
• Start Date: 08-Sep-2023
• Completion Date: 16-Aug-2023

Relations

• Revises: IEC 60626-1:2009 - Combined flexible materials for electrical insulation - Part 1: Definitions and general requirements
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60626-1 ®
Edition 4.0 2023-08
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Combined flexible materials for electrical insulation –
Part 1: Definitions and general requirements

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
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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.

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IEC 60626-1 ®
Edition 4.0 2023-08
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Combined flexible materials for electrical insulation –
Part 1: Definitions and general requirements
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.035.01 ISBN 978-2-8322-7405-7

– 2 – IEC 60626-1:2023 RLV © IEC 2023
CONTENTS
FOREWORD . 3
INTRODUCTION . 2
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Designations . 8
4.1 Designation – Product . 8
4.2 Designation – Testing . 9
4.2.1 General testing . 10
4.2.2 Mechanical testing . 10
4.2.3 Electrical testing . 10
4.2.4 Thermal/Chemical testing . 10
5 General requirements . 11
5.1 Supply of material . 11
5.2 Consignment requirements . 11
5.3 Roll requirements . 11
5.4 Contamination requirements . 11
5.5 Warp requirements . 11
6 Dimensions. 11
7 Joins . 11
8 Conditions of supply . 11
8.1 Roll form . 11
8.2 Sheet form . 11
8.3 Packaging . 11
8.4 Labelling . 12
8.5 Special conditions of supply . 12
Bibliography . 13

Table 1 – Commonly used flexible materials . 9

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
COMBINED FLEXIBLE MATERIALS FOR ELECTRICAL INSULATION –

Part 1: Definitions and general requirements

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
This redline version of the official IEC Standard allows the user to identify the changes
made to the previous edition IEC 60626-1:2009. A vertical bar appears in the margin
wherever a change has been made. Additions are in green text, deletions are in
strikethrough red text.
– 4 – IEC 60626-1:2023 RLV © IEC 2023
IEC 60626-1 has been prepared by IEC technical committee 15: Solid electrical insulating
materials. It is an International Standard.
This fourth edition cancels and replaces the third edition published in 2009. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) the materials available for use within this series of standards have been updated;
b) a framework has been created to allow test methods beyond those used for quality control
specifications to allow for testing for qualification purposes.
The text of this International Standard is based on the following documents:
Draft Report on voting
15/1009/FDIS 15/1016/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts in the IEC 60626 series, published under the general title Combined flexible
materials for electrical insulation, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The "colour inside" logo on the cover page of this document indicates that it
contains colours which are considered to be useful for the correct understanding of its
contents. Users should therefore print this document using a colour printer.

INTRODUCTION
This document is one of a series which deals with combined flexible materials consisting of two
or more different insulating materials laminated together. The components of the combined
materials are plastic films and/or fibrous materials such as papers, woven or non-woven fabrics,
impregnated or not impregnated. This document does not include mica papers used as primary
component, which are covered by the IEC 60371 series, but insulation materials based on mica
can be used as component of a combined flexible material.
This series consist of three parts describing:
Part 1: Definitions and general requirements (IEC 60626-1);
Part 2: Methods of test (IEC 60626-2);
Part 3: Specifications for individual materials (IEC 60626-3).

– 6 – IEC 60626-1:2023 RLV © IEC 2023
COMBINED FLEXIBLE MATERIALS FOR ELECTRICAL INSULATION –

Part 1: Definitions and general requirements

1 Scope
This part of IEC 60626 contains the definitions related to and the general requirements to be
fulfilled by combined flexible materials for electrical insulation. This document does not include
mica papers used as a primary component, which are covered by the IEC 60371 series, but
insulation materials based on mica paper may can be used as complementary component of a
combined flexible material. Materials which conform to this specification meet established levels
of performance. However, the selection of material by a user for a specific application should
be 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 containe
...

IEC 60626-1 ®
Edition 4.0 2023-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Combined flexible materials for electrical insulation –
Part 1: Definitions and general requirements

Matériaux combinés souples destinés à l'isolement électrique –
Partie 1: Définitions et exigences générales
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.

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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 corrigendum or an amendment might have been published.

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and withdrawn publications.
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containing more than 22 300 terminological entries in English
details all new publications released. Available online and once
and French, with equivalent terms in 19 additional languages.
a month by email.
Also known as the International Electrotechnical Vocabulary

(IEV) online.
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IEC 60626-1 ®
Edition 4.0 2023-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Combined flexible materials for electrical insulation –

Part 1: Definitions and general requirements

Matériaux combinés souples destinés à l'isolement électrique –

Partie 1: Définitions et exigences générales

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.035.01  ISBN 978-2-8322-7361-6

– 2 – IEC 60626-1:2023 © IEC 2023
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Designations . 8
4.1 Designation – Product . 8
4.2 Designation – Testing . 10
4.2.1 General testing . 10
4.2.2 Mechanical testing . 10
4.2.3 Electrical testing . 10
4.2.4 Thermal/Chemical testing . 10
5 General requirements . 10
5.1 Supply of material . 10
5.2 Consignment requirements . 10
5.3 Roll requirements . 10
5.4 Contamination requirements . 10
5.5 Warp requirements . 10
6 Dimensions. 10
7 Joins . 11
8 Conditions of supply . 11
8.1 Roll form . 11
8.2 Sheet form . 11
8.3 Packaging . 11
8.4 Labelling . 11
8.5 Special conditions of supply . 11
Bibliography . 12

Table 1 – Commonly used flexible materials . 9

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
COMBINED FLEXIBLE MATERIALS FOR ELECTRICAL INSULATION –

Part 1: Definitions and general requirements

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
IEC 60626-1 has been prepared by IEC technical committee 15: Solid electrical insulating
materials. It is an International Standard.
This fourth edition cancels and replaces the third edition published in 2009. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) the materials available for use within this series of standards have been updated;
b) a framework has been created to allow test methods beyond those used for quality control
specifications to allow for testing for qualification purposes.

– 4 – IEC 60626-1:2023 © IEC 2023
The text of this International Standard is based on the following documents:
Draft Report on voting
15/1009/FDIS 15/1016/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts in the IEC 60626
...