IEC 60371-3-2:2005

Insulating materials based on mica - Part 3: Specifications for individual materials - Sheet 2: Mica paper

IEC 60371-3-2:2006 gives requirements for electrical insulating materials made from mica paper which is to be processed for built-up mica materials according to IEC 60371-1, such as rigid flat mica materials, flexible mica materials, curable flexible mica materials and shaped pieces. This second edition cancels and replaces the first edition, published in 1991, and constitutes a technical revision. The main changes with regard to the previous edition include adjustments to align this standard with changes included in the latest edition of IEC 60371-2. Keywords: electrical insulating materials, mica paper

Matériaux isolants à base de mica - Partie 3: Spécifications pour matériaux particuliers - Feuille 2: Papier de mica

L'IEC 60371-3-2:2006 fournit des exigences pour les matériaux isolants électriques réalisés en papier de mica qui est utilisé pour la fabrication de matériaux à base de mica conformément à la CEI 60371-1-1, tels que des plaques rigides de matériaux à base de mica, des matériaux souples à base de mica, des matériaux souples durcissables à base de mica et des pièces de forme. Cette seconde édition annule et remplace la première édition parue en 1991 dont elle constitue une révision technique. Les principales modifications par rapport à l'édition antérieure incluent des ajustements pour faire correspondre la présente norme aux modifications de la dernière édition de la CEI 60371-2. Mots clés: matériaux isolants électriques, papier de mica

General Information

• Status: Published
• Publication Date: 23-Oct-2005
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.035.10 - Paper and board insulating materials
• ICS: 29.035.50 - Mica based materials
• Technical Committee: TC 15 - Solid electrical insulating materials
• Drafting Committee: MT 11 - TC 15/MT 11
• Current Stage: PPUB - Publication issued
• Start Date: 15-Mar-2006
• Completion Date: 24-Oct-2005

Standards Content (Sample)

INTERNATIONAL IEC
STANDARD 60371-3-2
Second edition
2005-10
Insulating materials based on mica –
Part 3:
Specifications for individual materials –
Sheet 2: Mica paper
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.
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INTERNATIONAL IEC
STANDARD 60371-3-2
Second edition
2005-10
Insulating materials based on mica –
Part 3:
Specifications for individual materials –
Sheet 2: Mica paper
 IEC 2005  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: [phone] Telefax: [phone] E-mail: [e-mail] Web: www.iec.ch
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International Electrotechnical Commission
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For price, see current catalogue

– 2 – 60371-3-2  IEC:2005(E)
CONTENTS
FOREWORD.3
INTRODUCTION.5

1 Scope.6
2 Normative references .6
3 General .6
3.1 Classification and designation .6
3.2 Standard forms of delivery.7
3.3 Marking .7
4 General requirements .7
4.1 Conditions as received .7
4.2 Properties .8
5 Tests .8
5.1 Test specimens .8

Figure 1 – Mica paper – Air porosity .10
Figure 2 – Mica paper – Penetration .11
Figure 3 – Mica paper – Tensile strength .12

Table 1 – Dimensions of test specimens .8
Table 2 – Requirements for mica paper .9

60371-3-2  IEC:2005(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INSULATING MATERIALS BASED ON MICA –

Part 3: Specifications for individual materials –
Sheet 2: Mica paper
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.
International Standard IEC 60371-3-2 has been prepared by IEC technical committee 15:
Standards on specifications for electrical Insulating materials.
This second edition cancels and replaces the first edition, published in 1991, and constitutes
a technical revision.
The main changes with regard to the previous edition include adjustments to align this
standard with changes included in the latest edition of IEC 60371-2.

– 4 – 60371-3-2  IEC:2005(E)
The text of this standard is based on the following documents:
FDIS Report on voting
15/227/FDIS 15/245/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.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this publication 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.
A bilingual version of this publication may be issued at a later date.

60371-3-2  IEC:2005(E) – 5 –
INTRODUCTION
This part of IEC 60371 forms part of a series which deals with insulatin
...

IEC 60371-3-2 ®
Edition 2.0 2005-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Insulating materials based on mica –
Part 3: Specifications for individual materials –
Sheet 2: Mica paper
Matériaux isolants à base de mica –
Partie 3: Spécifications pour matériaux particuliers –
Feuille 2: Papier de mica
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IEC 60371-3-2 ®
Edition 2.0 2005-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Insulating materials based on mica –

Part 3: Specifications for individual materials –

Sheet 2: Mica paper
Matériaux isolants à base de mica –

Partie 3: Spécifications pour matériaux particuliers –

Feuille 2: Papier de mica
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX M
ICS 29.035.10; 29.035.50 ISBN 978-2-8322-1596-8

– 2 – IEC 60371-3-2:2005 © IEC 2005
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 General . 6
3.1 Classification and designation . 6
3.2 Standard forms of delivery . 7
3.3 Marking . 7
4 General requirements . 7
4.1 Conditions as received . 7
4.2 Properties . 8
5 Tests . 8
5.1 Test specimens . 8
5.1.1 Sampling and preparation of test specimens . 8
5.1.2 Dimensions of test specimens . 8

Figure 1 – Mica paper – Air porosity . 10
Figure 2 – Mica paper – Penetration . 11
Figure 3 – Mica paper – Tensile strength . 12

Table 1 – Dimensions of test specimens . 8
Table 2 – Requirements for mica paper . 9

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INSULATING MATERIALS BASED ON MICA –

Part 3: Specifications for individual materials –
Sheet 2: Mica paper
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.
International Standard IEC 60371-3-2 has been prepared by IEC technical committee 15:
Standards on specifications for electrical Insulating materials.
This bilingual version (2014-05) corresponds to the English version, published in 2005-10.
This second edition cancels and replaces the first edition, published in 1991, and constitutes
a technical revision.
The main changes with regard to the previous edition include adjustments to align this
standard with changes included in the latest edition of IEC 60371-2.

– 4 – IEC 60371-3-2:2005 © IEC 2005
The text of this standard is based on the following documents:
FDIS Report on voting
15/227/FDIS 15/245/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.
The French version of this standard has not been voted upon.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this publication 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.
INTRODUCTION
This part of IEC 60371 forms part of a series which deals with insulating materials built up
from mica splittings or mica paper with or without reinforcement, and with mica paper in its
pure state for use in electrical equipment.
IEC 60371 consists of three parts under the main title Specification for insulating materials
based on mica:
Part 1: Definitions and general requirements
Part 2: Methods of test
Part 3: Specifications for individual materials
This standard contains one of the sheets comprising part 3, as follows:
Sheet 2: Mica paper
– 6 – IEC 60371-3-2:2005 © IEC 2005
INSULATING MATERIALS BASED ON MIC
...