IEC 60763-2:2007
(Main)Specification for laminated pressboard - Part 2: Methods of test
Specification for laminated pressboard - Part 2: Methods of test
IEC 60763-2:2007 gives methods of test applicable for the material classified in IEC 60763-1. This edition includes the following significant technical changes with respect to the previous edition:
The standard has generally been revised editorially and brought into line with IEC 60641-2;
The test method for the determination of the internal ply strength has been replaced with an alternative method; and
The test method for the determination of the thermal resistance has been enlarged in its scope.
Spécification pour cartons comprimés et contrecollés - Partie 2: Méthodes d'essai
La CEI 60763-2:2007 expose les méthodes d'essai applicables aux matériaux classés dans la CEI 60763-1. La présente édition comporte les modifications techniques significatives suivantes par rapport à l'édition précédente:
D'une manière générale, la norme a été révisée et mise en conformité avec la CEI 60641 2;
La méthode d'essai permettant de déterminer la résistance à la traction des couches internes a été remplacée par une autre méthode;
Le domaine d'application de la méthode d'essai permettant de déterminer la résistance thermique a été élargi.
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INTERNATIONAL IEC
STANDARD 60763-2
Second edition
2007-02
Specification for laminated pressboard –
Part 2:
Methods of test
Reference number
Publication numbering
As from 1 January 1997 all IEC publications are issued with a designation in the
60000 series. For example, IEC 34-1 is now referred to as IEC 60034-1.
Consolidated editions
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edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the base publication, the
base publication incorporating amendment 1 and the base publication incorporating
amendments 1 and 2.
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INTERNATIONAL IEC
STANDARD 60763-2
Second edition
2007-02
Specification for laminated pressboard –
Part 2:
Methods of test
© IEC 2007 ⎯ Copyright - all rights reserved
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 the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale R
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue
– 2 – 60763-2 © IEC:2007(E)
CONTENTS
FOREWORD.4
INTRODUCTION.6
1 Scope.7
2 Normative references .7
3 Conditioning of test specimens .8
4 Drying of test specimens .8
4.1 Method A (preferable) .8
4.2 Method B.8
5 Dimensions .8
5.1 Thickness.8
6 Mechanical tests.9
6.1 Flexural strength and load to produce a standard deflection .9
6.2 Apparent modulus of elasticity in flexure .10
7 Compressibility.10
7.1 Principle.10
7.2 Test apparatus .11
7.3 Test pieces.11
7.4 Procedure .11
7.5 Results.11
8 Electric strength in oil .12
8.1 General and conditioning.12
8.2 Electric strength along laminate (edgewise electric strength).12
9 Internal ply strength, thermal resistance and oil compatibility .12
9.1 Principle.12
9.2 Test specimens .12
9.3 Test apparatus .13
9.4 Procedure .13
9.5 Determination of the flexural strength.13
9.6 Results.13
10 Apparent density .14
10.1 Test specimens .14
10.2 Procedure .14
10.3 Results.14
11 Moisture content.15
12 Shrinkage in air after drying.15
12.1 Test specimens .15
12.2 Procedure .15
12.3 Results.15
13 Oil absorption.15
13.1 Test specimens .15
13.2 Procedure .15
13.3 Results.16
14 Ash content .16
14.1 Procedure .16
60763-2 © IEC:2007(E) – 3 –
14.2 Results.16
15 Contamination of liquid dielectrics .16
15.1 Apparatus.16
15.2 Test specimens .16
15.3 Procedure .17
15.4 Results.17
16 Conductivity of aqueous extract.17
16.1 Procedure .17
16.2 Results.17
17 pH of aqueous extract .17
Figure 1 – Position of test specimen in relation to length, width and thickness of sheet .17
Figure 2 – Size of the test specimens and arrangement of the electrodes for testing the
electric strength along laminae (edgewise electric strength).18
Figures 3 and 4 – Alternative forms of vented electrodes .19
Table 1 – Number of test specimens .13
– 4 – 60763-2 © IEC:2007(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
SPECIFICATION FOR LAMINATED PRESSBOARD –
Part 2: Methods of test
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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
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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 60763-2 has been prepared by IEC technical committee 15: Solid
electrical insulating materials.
This second edition cancels and replaces the first edition published in 1991 and constitutes a
technical revision.
This edition includes the following significant technical changes with respect to the previous
edition.
a) The standard has generally been revised editorially and brought into line with
IEC 60641-2.
b) The test method for the determination of the internal ply strength has been replaced with
an alternative method.
c) The test method for the determination of the thermal resistance has been enlarged in its
scope.
60763-2 © IEC:2007(E) – 5 –
The text of this standard is based on the following documents:
FDIS Report on voting
15/360/FDIS 15/373/RVD
Full information on the voting for the approval of this part can be found in the report on voting
indicated in the above table.
...
IEC 60763-2 ®
Edition 2.0 2007-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Specification for laminated pressboard –
Part 2: Methods of test
Spécification pour cartons comprimés et contrecollés –
Partie 2: Méthodes d’essai
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 la CEI ou du Comité national de la CEI du pays du demandeur.
Si vous avez des questions sur le copyright de la CEI ou si vous désirez obtenir des droits supplémentaires sur cette
publication, utilisez les coordonnées ci-après ou contactez le Comité national de la CEI de votre pays de résidence.
IEC Central Office
3, rue de Varembé
CH-1211 Geneva 20
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Email: inmail@iec.ch
Web: 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.
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normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.
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IEC 60763-2 ®
Edition 2.0 2007-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Specification for laminated pressboard –
Part 2: Methods of test
Spécification pour cartons comprimés et contrecollés –
Partie 2: Méthodes d’essai
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
R
CODE PRIX
ICS 17.220.99; 29.035.10 ISBN 978-2-88910-287-7
– 2 – 60763-2 © IEC:2007
CONTENTS
FOREWORD.4
INTRODUCTION.6
1 Scope.7
2 Normative references .7
3 Conditioning of test specimens .8
4 Drying of test specimens .8
4.1 Method A (preferable) .8
4.2 Method B.8
5 Dimensions .8
5.1 Thickness.8
6 Mechanical tests.9
6.1 Flexural strength and load to produce a standard deflection .9
6.2 Apparent modulus of elasticity in flexure .10
7 Compressibility.10
7.1 Principle.10
7.2 Test apparatus .11
7.3 Test pieces.11
7.4 Procedure .11
7.5 Results.11
8 Electric strength in oil .12
8.1 General and conditioning.12
8.2 Electric strength along laminate (edgewise electric strength).12
9 Internal ply strength, thermal resistance and oil compatibility .12
9.1 Principle.12
9.2 Test specimens .12
9.3 Test apparatus .13
9.4 Procedure .13
9.5 Determination of the flexural strength.13
9.6 Results.13
10 Apparent density .14
10.1 Test specimens .14
10.2 Procedure .14
10.3 Results.14
11 Moisture content.15
12 Shrinkage in air after drying.15
12.1 Test specimens .15
12.2 Procedure .15
12.3 Results.15
13 Oil absorption.15
13.1 Test specimens .15
13.2 Procedure .15
13.3 Results.16
14 Ash content .16
14.1 Procedure .16
14.2 Results.16
60763-2 © IEC:2007 – 3 –
15 Contamination of liquid dielectrics .16
15.1 Apparatus.16
15.2 Test specimens .16
15.3 Procedure .17
15.4 Results.17
16 Conductivity of aqueous extract.17
16.1 Procedure .17
16.2 Results.17
17 pH of aqueous extract .17
Figure 1 – Position of test specimen in relation to length, width and thickness of sheet .17
Figure 2 – Size of the test specimens and arrangement of the electrodes for testing the
electric strength along laminae (edgewise electric strength).18
Figures 3 and 4 – Alternative forms of vented electrodes .19
Table 1 – Number of test specimens .13
– 4 – 60763-2 © IEC:2007
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
SPECIFICATION FOR LAMINATED PRESSBOARD –
Part 2: Methods of test
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 pu
...
IEC 60763-2 ®
Edition 2.1 2023-11
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Specification for laminated pressboard –
Part 2: Methods of test
Spécification pour cartons comprimés et contrecollés –
Partie 2: Méthodes d'essai
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 Secretariat Tel.: +41 22 919 02 11
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CH-1211 Geneva 20 www.iec.ch
Switzerland
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
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A propos des publications IEC
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IEC 60763-2 ®
Edition 2.1 2023-11
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Specification for laminated pressboard –
Part 2: Methods of test
Spécification pour cartons comprimés et contrecollés –
Partie 2: Méthodes d'essai
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.220.99, 29.035.10 ISBN 978-2-8322-7876-5
IEC 60763-2 ®
Edition 2.1 2023-11
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
Specification for laminated pressboard –
Part 2: Methods of test
Spécification pour cartons comprimés et contrecollés –
Partie 2: Méthodes d'essai
– 2 – IEC 60763-2:2007+AMD1:2023 CSV
IEC 2023
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Conditioning of test specimens . 8
4 Drying of test specimens . 8
4.1 Method A (preferable) . 8
4.2 Method B . 8
5 Dimensions . 8
5.1 Thickness . 8
6 Mechanical tests. 9
6.1 Flexural strength and load to produce a standard deflection . 9
6.2 Apparent modulus of elasticity in flexure . 10
7 Compressibility . 10
7.1 Principle . 10
7.2 Test apparatus . 11
7.3 Test pieces. 11
7.4 Procedure . 11
7.5 Results . 11
8 Electric strength in oil . 12
8.1 General and conditioning . 12
8.2 Electric strength along laminate (edgewise electric strength) . 12
9 Internal ply strength, thermal resistance and oil compatibility . 12
9.1 Principle . 12
9.2 Test specimens . 12
9.3 Test apparatus . 13
9.4 Procedure . 13
9.5 Determination of the flexural strength . 13
9.6 Results . 13
10 Apparent density . 14
10.1 Test specimens . 14
10.2 Procedure . 14
10.3 Results . 14
11 Moisture content . 15
12 Shrinkage in air after drying . 15
12.1 Test specimens .
12.2 Procedure .
12.3 Results .
12.1 Test apparatus . 15
12.2 Test pieces. 15
12.3 Procedure . 16
12.4 Results . 16
13 Oil absorption . 17
13.1 Test specimens . 17
13.2 Procedure . 17
IEC 2023
13.3 Results . 17
14 Ash content . 17
14.1 Procedure . 17
14.2 Results . 17
15 Contamination of liquid dielectrics . 17
15.1 Apparatus . 17
15.2 Test specimens . 18
15.3 Procedure . 18
15.4 Results . 18
16 Conductivity of aqueous extract . 18
16.1 Procedure . 18
16.2 Results . 18
17 pH of aqueous extract . 18
Figure 1 – Position of test specimen in relation to length, width and thickness of sheet . 19
Figure 2 – Size of the test specimens and arrangement of the electrodes for testing the
electric strength along laminae (edgewise electric strength) . 19
Figures 3 and 4 – Alternative forms of vented electrodes . 20
Table 1 – Number of test specimens . 13
– 4 – IEC 60763-2:2007+AMD1:2023 CSV
IEC 2023
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
SPECIFICATION FOR LAMINATED PRESSBOARD –
Part 2: Methods of test
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 stan
...
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