EN 60371-2:2004

SLOVENSKI SIST EN 60371-2:2005

STANDARD
december 2005
Specifikacija izolacijskih snovi iz sljude – 2. del: Preskusne metode (IEC
60371-2:2004)
Specification for insulating materials based on mica - Part 2: Methods of test (IEC
60371-2:2004)
ICS 29.035.50 Referenčna številka
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

EUROPEAN STANDARD EN 60371-2
NORME EUROPÉENNE
EUROPÄISCHE NORM November 2004

ICS 17.220.99; 29.035.50 Supersedes EN 60371-2:1997

English version
Specification for insulating materials based on mica
Part 2: Methods of test
(IEC 60371-2:2004)
Spécification pour les matériaux isolants  Bestimmung für Isoliermaterialien
à base de mica aus Glimmer
Partie 2: Méthodes d'essais Teil 2: Prüfverfahren
(CEI 60371-2:2004) (IEC 60371-2:2004)

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 60371-2:2004 E
Foreword
The text of document 15C/1610/FDIS, future edition 3 of IEC 60371-2, 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 60371-2 on 2004-09-01.
This European Standard supersedes EN 60371-2:1997.
The main changes with respect to EN 60371-2:1997 are as follows:
a) All clauses re-numbered.
b) Relevant template of ISO 67 has been added to this standard as Annex A.
c) Clause 8: Tensile strength and elongation at break
Procedure modified to give "rate of movement" instead of "time limit". Different rate of movement
for raw mica as opposed to reinforced and/or impregnated mica.
d) Clause 11: Stiffness
Size of test specimen revised. wording modified so that standard covers materials using carriers
other than woven glass cloth and materials that are 3-ply. Revision of terms "machine direction"
and "transverse direction".
e) Clause 13: Elastic compression and plastic compression
Tolerance on measurement of height of stack changed to within 0,01 mm.
Times for change in pressure in procedure changed to 1 min.
f) Clause 16: Electric strength
Modified in line with Amendment 1:1994 to IEC 60371-2:1987 (included in EN 60371-2:1997).
Changes relate to latest edition of EN 60243-1.
g) Clause 19: Detection of defects and conductive particles
Revised subclause.
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 60371-2:2004 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 60371-2:2004
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 60216 Series Electrical insulating materials - Thermal EN 60216 Series
endurance properties
IEC 60243-1 1998 Electrical strength of insulating materials - EN 60243-1 1998
Test methods
Part 1: Tests at power frequencies

IEC 60250 1969 Recommended methods for the - -
determination of the permittivity and
dielectric dissipation factor of electrical
insulating materials at power, audio and
radio frequencies including metre
wavelengths
IEC 60371-3 Series Specifications for insulating materials EN 60371-3 Series
based on mica
Part 3: Specifications for individual
materials
1) 2)
ISO 178 - Plastics - Determination of flexural EN ISO 178 2003
properties
1)
Undated reference.
2)
Valid edition at date of issue.

NORME CEI
INTERNATIONALE IEC
60371-2
INTERNATIONAL
Troisième édition
STANDARD
Third edition
2004-06
Spécification pour les matériaux isolants
à base de mica –
Partie 2:
Méthodes d'essais
Specification for insulating materials
based on mica –
Part 2:
Methods of test
© 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.
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Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
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60371-2 © IEC:2004 – 3 –
CONTENTS
FOREWORD.7
INTRODUCTION.11
1 Scope.13
2 Normative references.13
3 Preparation methods of test specimens for curable materials .13
3.1 General.13
3.2 Method 1.13
3.3 Method 2.15
4 Thickness.17
4.1 Test apparatus.17
4.2 Test specimen.17
4.3 Procedure.19
4.4 Statement of results.21
5 Density.21
6 Calculated density.21
7 Composition.21
7.1 Test specimen.21
7.2 Mass per unit area in the "as received" condition .21
7.3 Content of volatiles and mass per unit area of dried material.21
7.4 Binder content.23
’
7.5 Mass per unit area of reinforcement material (m′ ) .25
r
7.6 Mica content.27
7.7 Size of splittings.27
8 Tensile strength and elongation at break .29
8.1 Test apparatus.29
8.2 Test specimen.29
8.3 Procedure.29
8.4 Statement of results.29
9 Flexural strength and elastic modulus in bend .31
9.1 Test specimen.31
9.2 Procedure.31
10 Folding.31
11 Stiffness.31
11.1 Conditioning and test atmosphere .31
11.2 Test specimens.31
11.3 Procedure.31
11.4 Statement of results.33
12 Resistance to exudation and displacement .33
12.1 Test apparatus.33
12.2 Test specimen.33
12.3 Procedure.33
12.4 Statement of results.35

60371-2 © IEC:2004 – 5 –
13 Elastic compression and plastic compression .35
13.1 Test apparatus.35
13.2 Test specimen.35
13.3 Procedure.35
13.4 Statement of results.37
14 Resin flow and consolidation .37
14.1 Test specimen.37
14.2 Procedure.37
14.3 Statement of results.39
15 Gel time.39
16 Electric strength.39
16.1 Electrodes.39
16.2 Test specimen.41
16.3 Procedure.41
16.4 Statement of results.41
17 Dissipation factor/temperature characteristics at frequencies of between 48 Hz
and 62 Hz.41
17.1 Test specimen.41
17.2 Test conditions.41
17.3 Electrodes.
...