IEC 60371-3-2:2005

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
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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
...