EN 60641-2:2004

SLOVENSKI SIST EN 60641-2:2005

STANDARD
december 2005
Prešpanske plošče in prešpanski papir za električne namene – 2. del:
Preskusne metode (IEC 60641-2:2004)
Pressboard and presspaper for electrical purposes - Part 2: Methods of test (IEC
60641-2:2004)
ICS 29.035.10 Referenčna številka
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

EUROPEAN STANDARD EN 60641-2
NORME EUROPÉENNE
EUROPÄISCHE NORM October 2004

ICS 17.220.99 ; 29.935.10 Supersedes EN 60641-2:1995

English version
Pressboard and presspaper for electrical purposes
Part 2: Methods of tests
(IEC 60641-2:2004)
Carton comprimé et papier comprimé  Tafel- und Rollenpressspan
à usages électriques für elektrotechnische Anwendungen
Partie 2: Méthodes d'essai Teil 2: Prüfverfahren
(CEI 60641-2:2004) (IEC 60641-2:2004)

This European Standard was approved by CENELEC on 2004-09-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden,
Switzerland and United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2004 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 60641-2:2004 E
Foreword
The text of document 15C/1609/FDIS, future edition 2 of IEC 60641-2, prepared by SC 15C,
Specifications, of IEC TC 15, Insulating materials, was submitted to the IEC-CENELEC parallel vote
and was approved by CENELEC as EN 60641-2 on 2004-09-01.
This European Standard supersedes EN 60641-2:1995.
The main changes with respect to EN 60641-2:1995 are listed below:
The following test methods have been cancelled:
– flexibility;
– conductivity of the organic extract;
– contamination of liquid dielectrics.
The following test methods have been rewritten:
– compressibility;
– conductivity of the aqueous extract;
– cohesion between plies.
The following test method has been introduced:
– determination of metallic particles with X-ray.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2005-06-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2007-09-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60641-2:2004 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 60247 NOTE Harmonized as EN 60247:2004 (not modified).
ISO 186 NOTE Harmonized as EN ISO 186:2002 (not modified).
__________
- 3 - EN 60641-2:2004
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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.
NOTE Where an international publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
Publication Year Title EN/HD Year
IEC 60243-1 1998 Electrical strength of insulating materials - EN 60243-1 1998
Test methods
Part 1: Tests at power frequencies

IEC 60296 2003 Fluids for electrotechnical applications - EN 60296 2004
Unused mineral insulating oils for + corr. September 2004
transformers and switchgear
IEC 60554-2 2001 Cellulosic papers for electrical purposes EN 60554-2 2002
Part 2: Methods of test
ISO 287 1985 Paper and board - Determination of EN 20287 1994
moisture content - Oven-drying method

ISO 534 1988 Paper and board - Determination of EN 20534 1993
thickness and apparent bulk density or
apparent sheet density
ISO 1924-2 1994 Paper and board - Determination of EN ISO 1924-2 1995
tensile properties
Part 2: Constant rate of elongation
method
ISO 1974 1990 Paper - Determination of tearing EN 21974 1994
resistance (Elmendorf method)
ISO 2144 1997 Paper, board and pulps - Determination - -
of residue (ash) on ignition at 900
degrees C
NORME CEI
INTERNATIONALE IEC
60641-2
INTERNATIONAL
Deuxième édition
STANDARD
Second edition
2004-06
Carton comprimé et papier comprimé
à usages électriques –
Partie 2:
Méthodes d'essai
Pressboard and presspaper
for electrical purposes –
Part 2:
Methods of tests
© IEC 2004 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 any
utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including
électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from
microfilms, sans l'accord écrit de l'éditeur. 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
CODE PRIX
PRICE CODE U
Commission Electrotechnique Internationale
International Electrotechnical Commission
ɆɟɠɞɭɧɚɪɨɞɧɚɹɗɥɟɤɬɪɨɬɟɯɧɢɱɟɫɤɚɹɄɨɦɢɫɫɢɹ
Pour prix, voir catalogue en vigueur
For price, see current catalogue

60641-2 © IEC:2004 – 3 –
CONTENTS
FOREWORD.7
1 Scope.11
2 Normative references.11
3 Terms and definitions .13
4 General notes on tests .13
4.1 Conditioning.13
4.2 Drying.13
4.3 Tolerances.13
4.4 Results.15
5 Thickness.15
5.1 Test apparatus.15
5.2 Setting gauge.15
5.3 Procedure.17
5.4 Results.17
6 Apparent density.17
7 Tensile strength and elongation.19
7.1 Principle.19
7.2 Determination with non-folded test pieces .19
7.3 Determination with folded test pieces .19
8 Internal tearing resistance.19
9 Edge tearing resistance.21
9.1 Procedure.21
9.2 Results.21
10 Compressibility.21
10.1 Principle.21
10.2 Test apparatus.21
10.3 Test pieces.21
10.4 Procedure.21
10.5 Results.23
11 Shrinkage.23
11.1 Test apparatus.23
11.2 Test pieces.23
11.3 Procedure.25
11.4 Results.25
12 Plybond resistance .25
12.1 Principle.25
12.2 Test pieces.25
12.3 Test apparatus.25
12.4 Test method.25
12.5 Results.27
13 Moisture content.27
14 Ash content.27

60641-2 © IEC:2004 – 5 –
15 Conductivity of aqueous extract.29
15.1 Test apparatus.29
15.2 Procedure.29
15.3 Results.29
16 pH of aqueous extract .31
16.1 Test apparatus.31
16.2 Procedure.31
16.3 Results.31
17 Oil absorption.31
17.1 Test pieces.31
17.2 Procedure.31
17.3 Results.33
18 Conducting paths.33
19 Presence of metallic particles .33
19.1 Chemical methods.33
19.2 X-ray method.35
20 Electric strength.39
20.1 Test apparatus.39
20.2 Test pieces for test in air .39
20.3 Test pieces for test in oil .
...