IEC 61628-2:1998

Corrugated pressboard and presspaper for electrical purposes - Part 2: Methods of test

Gives test methods (type and dimension of corrugation, dimensional changes on drying, compressive strength and compression modulus) for the materials classified in IEC 61628-1.

Cartons et papiers comprimés ondulés à usages électriques - Partie 2: Méthodes d'essais

Donne des méthodes d'essais (types et dimensions de l'ondulation, variation dimensionnelle au séchage, résistance à la compression et module de compression) applicables aux matériaux définis dans la CEI 61628-1.

General Information

• Status: Published
• Publication Date: 05-Nov-1998
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.035.10 - Paper and board insulating materials
• Technical Committee: TC 15 - Solid electrical insulating materials
• Drafting Committee: MT 14 - TC 15/MT 14
• Current Stage: PPUB - Publication issued
• Start Date: 30-Nov-1998
• Completion Date: 06-Nov-1998

Relations

• Amended By: IEC 61628-2:1998/AMD1:2007 - Amendment 1 - Corrugated pressboard and presspaper for electrical purposes - Part 2: Methods of test
• Effective Date: 05-Sep-2023

Standards Content (Sample)

NORME
CEI
INTERNATIONALE
IEC
61628-2
INTERNATIONAL
Première édition
STANDARD
First edition
1998-11
Cartons et papiers comprimés ondulés
à usages électriques –
Partie 2:
Méthodes d’essais
Corrugated pressboard and presspaper
for electrical purposes –
Part 2:
Methods of test
Numéro de référence
Reference number
CEI/IEC 61628-2:1998
Numéros des publications Numbering
Depuis le 1er janvier 1997, les publications de la CEI As from 1 January 1997 all IEC publications are
sont numérotées à partir de 60 000. issued with a designation in the 60 000 series.
Publications consolidées Consolidated publications
Les versions consolidées de certaines publications de Consolidated versions of some IEC publications
la CEI incorporant les amendements sont disponibles. including amendments are available. For example,
Par exemple, les numéros d’édition 1.0, 1.1 et 1.2 edition numbers 1.0, 1.1 and 1.2 refer, respectively, to
indiquent respectivement la publication de base, la the base publication, the base publication incor-
publication de base incorporant l’amendement 1, et porating amendment 1 and the base publication
la publication de base incorporant les amendements 1 incorporating amendments 1 and 2.
et 2.
Validité de la présente publication Validity of this publication
Le contenu technique des publications de la CEI est The technical content of IEC publications is kept under
constamment revu par la CEI afin qu'il reflète l'état constant review by the IEC, thus ensuring that the
actuel de la technique. content reflects current technology.
Des renseignements relatifs à la date de re- Information relating to the date of the reconfirmation of
confirmation de la publication sont disponibles dans the publication is available in the IEC catalogue.
le Catalogue de la CEI.
Les renseignements relatifs à des questions à l’étude et Information on the subjects under consideration and
des travaux en cours entrepris par le comité technique work in progress undertaken by the technical com-
qui a établi cette publication, ainsi que la liste des mittee which has prepared this publication, as well as
publications établies, se trouvent dans les documents the list of publications issued, is to be found at the
ci-dessous: following IEC sources:
• «Site web» de la CEI* • IEC web site*
• Catalogue des publications de la CEI • Catalogue of IEC publications
Publié annuellement et mis à jour régulièrement Published yearly with regular updates
(Catalogue en ligne)* (On-line catalogue)*
• Bulletin de la CEI • IEC Bulletin
Disponible à la fois au «site web» de la CEI* Available both at the IEC web site* and
et comme périodique imprimé as a printed periodical
Terminologie, symboles graphiques Terminology, graphical and letter
et littéraux symbols
En ce qui concerne la terminologie générale, le lecteur For general terminology, readers are referred to
se reportera à la CEI 60050: Vocabulaire Electro- IEC 60 050: International Electrotechnical Vocabulary
technique International (VEI). (IEV).
Pour les symboles graphiques, les symboles littéraux For graphical symbols, and letter symbols and signs
et les signes d'usage général approuvés par la CEI, le approved by the IEC for general use, readers are
lecteur consultera la CEI 60027: Symboles littéraux à referred to publications IEC 60027: Letter symbols to
utiliser en électrotechnique, la CEI 60417: Symboles be used in electrical technology, IEC 60417: Graphical
graphiques utilisables sur le matériel. Index, relevé et symbols for use on equipment. Index, survey and
compilation des feuilles individuelles, et la CEI 60617: compilation of the single sheets and IEC 60617:
Symboles graphiques pour schémas. Graphical symbols for diagrams.
* Voir adresse «site web» sur la page de titre. * See web site address on title page.

NORME
CEI
INTERNATIONALE
IEC
61628-2
INTERNATIONAL
Première édition
STANDARD
First edition
1998-11
Cartons et papiers comprimés ondulés
à usages électriques –
Partie 2:
Méthodes d’essais
Corrugated pressboard and presspaper
for electrical purposes –
Part 2:
Methods of test
 IEC 1998 Droits de reproduction réservés  Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in
utilisée sous quelque forme que ce soit et par aucun any form or by any means, electronic or mechanical,
procédé, électronique ou mécanique, y compris la photo- including photocopying and microfilm, without permission in
copie et les microfilms, sans l'accord écrit de l'éditeur. writing from the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: [phone] e-mail: [e-mail] IEC web site http: //www.iec.ch
CODE PRIX
Commission Electrotechnique Internationale
PRICE CODE M
International Electrotechnical Commission
Pour prix, voir catalogue en vigueur
For price, see current catalogue

– 2 – 61628-2 © CEI:1998
SOMMAIRE
Pages
AVANT-PROPOS . 4
INTRODUCTION . 6
Articles
1 Domaine d'application . 8
2 Référence normative. 8
3 Note générale sur les essais . 8
4 Type et dimension de l'ondulation. 8
5 Teneur en humidité . 12
6 Variation dimensionnelle au séchage. 12
7 Résistance à la compression et module de compression. 14
8 Conductivité de l'extrait aqueux . 18
Figures. 20

61628-2 © IEC:1998 – 3 –
CONTENTS
Page
FOREWORD . 5
INTRODUCTION . 7
Clause
1 Scope. 9
2 Normative reference. 9
3 General note on tests . 9
4 Type and dimension of corrugation . 9
5 Moisture content. 13
6 Dimensional changes on drying . 13
7 Compressive strength and compression modulus . 15
8 Conductivity of aqueous extract . 19
Figures. 21

– 4 – 61628-2 © CEI:1998
COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
________
CARTONS ET PAPIERS COMPRIMÉS ONDULÉS
À USAGES ÉLECTRIQUES –
Partie 2: Méthodes d'essais
AVANT-PROPOS
1) La CEI (Commission Electrotechnique Internationale) est une organisation mondiale de normalisation composée
de l'ensemble des comités électrotechniques nationaux (Comités nationaux de la CEI). La CEI a pour objet de
favoriser la coopération internationale pour toutes les questions de normalisation dans les domaines de
l'électricité et de l'électronique. A cet effet, la CEI, entre autres activités, publie des Normes internationales.
Leur élaboration est confiée à des comités d'études, aux travaux desquels tout Comité national intéressé par le
sujet traité peut participer. Les organisations internationales, gouvernementales et non gouvernementales, en
liaison avec la CEI, participent également aux travaux. La CEI collabore étroitement avec l'Organisation
Internationale de Normalisation (ISO), selon des conditions fixées par accord entre les deux organisations.
2) Les décisions ou accords officiels de la CEI concernant les questions techniques représentent, dans la mesure
du possible un accord international sur les sujets étudiés, étant donné que les Comités nationaux intéressés
sont représentés dans chaque comité d’études.
3) Les documents produits se présentent sous la forme de recommandations internationales. Ils sont publiés
comme normes, rapports techniques ou guides et agréés comme tels par les Comités nationaux.
4) Dans le but d'encourager l'unification internationale, les Comités nationaux de la CEI s'engagent à appliquer de
façon transparente, dans toute la mesure possible, les Normes internationales de la CEI dans leurs normes
nationales et régionales. Toute divergence entre la norme de la CEI et la norme nationale ou régionale
correspondante doit être indiquée en termes clairs dans cette dernière.
5) La CEI n’a fixé aucune procédure concernant le marquage comme indication d’approbation et sa responsabilité
n’est pas engagée quand un matériel est déclaré conforme à l’une de ses normes.
6) L’attention est attirée sur le fait que certains des éléments de la présente Norme internationale peuvent faire
l’objet de droits de propriété intellectuelle ou de droits analogues. La CEI ne saurait être tenue pour
responsable de ne pas avoir identifié de tels droits de propriété et de ne pas avoir signalé leur existence.
La Norme internationale CEI 61628-2 a été établie par le sous-comité 15C: Spécifications, du
comité d’études 15 de la CEI: Matériaux isolants.
Le texte de cette norme est issu des documents suivants:
FDIS Rapport de vote
15C/992/FDIS 15C/1008/RVD
Le rapport de vote indiqué dans le tableau ci-dessus donne toute information sur le vote ayant
abouti à l'approbation de cette norme.

61628-2 © IEC:1998 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
________
CORRUGATED PRESSBOARD AND PRESSPAPER
FOR ELECTRICAL PURPOSES –
Part 2: Methods of test
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, the IEC publishes International Standards. Their preparation is
entrusted to technical committees; any IEC National Committee interested in the subject dealt with may
participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. The IEC collaborates closely with the International Organization
for Standardization (ISO) in accordance with conditions determined by agreement between the two
organizations.
2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an
international consensus of opinion on the relevant subjects since each technical committee has representation
from all interested National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical reports or guides and they are accepted by the National Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61628-2 has been prepared by subcommittee 15C: Specifications,
of IEC technical committee 15: Insulating materials.
The text of this standard is based on the following documents:
FDIS Report on voting
15C/992/FDIS 15C/1008/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.

– 6 – 61628-2 © CEI:1998
INTRODUCTION
La présente partie de la CEI 61628 fait partie d'une série traitant des cartons et des papiers
comprimés ondulés à usages électriques.
Cette série comprend trois parties:
– CEI 61628-1:1997, Cartons et papiers comprimés ondulés à usages électriques – Partie 1:
Définitions, désignations et prescriptions générales
– CEI 61628-2:1998, Cartons et papiers comprimés ondulés à usages électriques – Partie 2:
Méthodes d'essais
– CEI 61628-3,— Cartons et papiers comprimés ondulés à usages électriques – Partie 3:
Spécifications pour matériaux particuliers, (à l'étude)

61628-2 © IEC:1998 – 7 –
INTRODUCTION
This part of IEC 61628 is one of a series which deals with corrugated pressboard and
presspaper for electrical purposes.
This series consists of three parts:
– IEC 61628-1:1997, Corrugated pressboard and presspaper for electrical purposes – Part 1:
Definitions, designations and general requirements
– IEC 61628-2:1998, Corrugated pressboard and presspaper for electrical purposes – Part 2:
Methods of test
– IEC 61628-3,— Corrugated pressboard and presspaper for electrical purposes – Part 3:
Specification for individual materials (under consideration)

– 8 – 61628-2 © CEI:1998
CARTONS ET PAPIERS COMPRIMÉS ONDULÉS
À USAGES ÉLECTRIQUES –
Partie 2: Méthodes d’essais
1 Domaine d'application
La p
...

IEC 61628-2 ®
Edition 1.1 2007-07
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Corrugated pressboard and presspaper for electrical purposes –
Part 2: Methods of test
Cartons et papiers comprimés ondulés à usages électriques –
Partie 2: Méthodes d’essais
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IEC 61628-2 ®
Edition 1.1 2007-07
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Corrugated pressboard and presspaper for electrical purposes –

Part 2: Methods of test
Cartons et papiers comprimés ondulés à usages électriques –

Partie 2: Méthodes d’essais
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.035.10 ISBN 2-8318-9236-8

– 2 – 61628-2 © IEC:1998+A1:2007
CONTENTS
FOREWORD.3
INTRODUCTION.5

1 Scope.6
2 Normative reference .6
3 General note on tests.6
4 Type and dimension of corrugation.6
5 Moisture content .8
6 Dimensional changes on drying.8
7 Compressive strength and compression modulus .9
8 Conductivity of aqueous extract .11

Figure 1 – Different types of corrugation.12
Figure 2 – Positioning of the test specimen.13
Figure 3 – Test specimen holder – Side view.13
Figure 4 – Curve of deflection versus force.14

61628-2 © IEC:1998+A1:2007 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
________
CORRUGATED PRESSBOARD AND PRESSPAPER
FOR ELECTRICAL PURPOSES –
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
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.
This consolidated version of the official IEC Standard and its amendment has been
prepared for user convenience.
IEC 61628-2 edition 1.1 contains the first edition (1998) [documents 15C/992/FDIS and
15C/1008/RVD] and its amendment 1 (2007) [documents 15/293/CDV and 15/340/RVC].
A vertical line in the margin shows where the base publication has been modified by
amendment 1.
International Standard IEC 61628-2 has been prepared by subcommittee 15C: Specifications,
of IEC technical committee 15: Insulating materials.

– 4 – 61628-2 © IEC:1998+A1:2007
The committee has decided that the contents of the base publication and its amendments will
remain unchanged until the maintenance result date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date,
the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
61628-2 © IEC:1998+A1:2007 – 5 –
INTRODUCTION
This part of IEC 61628 is one of a series which deals with corrugated pressboard and
presspaper for electrical purposes.
This series consists of three parts:
– IEC 61628-1:1997, Corrugated pressboard and presspaper for electrical purposes – Part 1:
Definitions, designations and general requirements
– IEC 61628-2:1998, Corrugated pressboard and presspaper for electrical purposes – Part 2:
Methods of test
– IEC 61628-3,— Corrugated pressboard and presspaper for electrical purposes – Part 3:
Specification for individual materials (under consideration)

– 6 – 61628-2 © IEC:1998+A1:2007
CORRUGATED PRESSBOARD AND PRESSPAPER
FOR ELECTRICAL PURPOSES –
Part 2: Methods of test
1 Scope
This part of IEC 61628 gives methods of test applicable for the materials classified in
IEC 61628-1.
2 Normative reference
The following referenced documents are indispensable for the application 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 60641-2:2004, Pressboard and presspaper for electrical purposes – Part 2: Methods of
test
3 General note on tests
It is recommended to use a high-speed band saw with a cut width less than 1 mm to make the
test specimens. The burrs made by cutting should be carefully removed.
Unless otherwise specified, the test specimens after being cut, shall be conditioned according
to IEC 60641-2.
4 Type and dimension of corrugation
The shape and type of corrugation are defined by wavelength, maximum amplitude, the length
of horizontal parts, angle of slope and the board thickness out of which the corrugated material
is made (see figures 1a and 1b).
The following tests are made on the material as received.
4.1 Wavelength
4.1.1 Procedure
Cut at least three test samples, each test sample having a length greater than three complete
wavelengths.
With a penci
...