SIST EN 60371-3-2:2006

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

This part of EN 60371 gives requirements for electrical insulating materials made from mica paper which is to be processed for built-up mica materials according to EN 60371-1, such as rigid flat mica materials, flexible mica materials, curable flexible mica materials and shaped pieces.

Isoliermaterialien aus Glimmer -- Teil 3: Bestimmungen für einzelne Materialien -- Blatt 2: Glimmerpapier

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

This part of EN 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.

Izolacijski materiali s sljudo – 3. del: Specifikacije posameznih snovi – 2. list: Sljudni papir (IEC 60371-3- 2:2005)

General Information

• Status: Published
• Publication Date: 30-Jun-2006
• ICS: 29.035.10 - Paper and board insulating materials
• ICS: 29.035.50 - Mica based materials
• Technical Committee: IZO - Insulating materials
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Jul-2006
• Due Date: 01-Jul-2006
• Completion Date: 01-Jul-2006
• Ref Project: EN 60371-3-2:2006 - Insulating materials based on mica - Part 3: Specifications for individual materials - Sheet 2: Mica paper

Relations

• Replaces: SIST EN 60371-3-2:1998 - Specification for insulating materials based on mica -- Part 3: Specifications for individual materials -- Sheet 2: Mica paper
• Effective Date: 06-May-2014

Overview

EN 60371-3-2:2006 (adopted from IEC 60371-3-2:2005) is a CLC/CENELEC standard that specifies requirements for mica paper used as an electrical insulating material. It applies to mica paper intended to be processed into built-up mica products covered by EN 60371-1 - for example rigid flat mica materials, flexible mica laminates, curable flexible mica materials and shaped pieces. The document defines classification, designation, delivery forms, marking, acceptance conditions and the test requirements that confirm conformity.

Key Topics

• Scope and purpose: Requirements for mica paper used in electrical insulation; not a substitute for application-specific material selection.
• Classification and designation: Mica paper types are designated by mica mineral and class:
  • MPM = muscovite-based mica paper (classes 1–3)
  • MPP = phlogopite-based mica paper (class 4)
  • Four main classes (Class 1–4) reflect production methods and material properties.
• Designation format: Letter symbols followed by four digits indicating class and mass per unit area (e.g., MPM-1050).
• Forms of delivery & marking: Supplied in rolls or sheets; marked with manufacturer, batch/roll number, designation and net mass.
• Quality & handling requirements: Paper must be flat, smooth, free from holes, creases, conductive inclusions or splices; packaging to protect during transport and storage.
• Testing and properties: Specified tests and specimen dimensions include:
  • Mass per unit area, thickness (ISO/IEC measurement methods)
  • Air porosity (ISO 5636-5, Gurley method)
  • Penetration and tensile strength (IEC/ISO test methods)
  • Conductivity of aqueous extract and loss of mass at 500 °C
  • Test methods and specimen sizes are listed in the standard (see Table 1 and Table 2 for requirements and limits).

Applications

EN 60371-3-2 is directly relevant to:

• Manufacturers of mica paper and mica-based insulating laminates
• Quality assurance and test laboratories verifying electrical insulation materials
• Designers and engineers of high-temperature electrical equipment (transformers, motors, switchgear) specifying mica-based insulators
• Procurement and compliance teams requiring documented conformity to European/IEC mica-paper specifications

Using this standard helps ensure consistent material performance (mechanical, thermal and electrical) for mica-paper-based insulation systems.

Related Standards

• EN/IEC 60371-1: Definitions and general requirements for insulating materials based on mica
• EN/IEC 60371-2: Methods of test for mica-based insulating materials
• IEC 60554-2, IEC 60589, ISO 534, ISO 536, ISO 5636-5 (referenced test and measurement standards)

Keywords: EN 60371-3-2, mica paper, insulating materials, IEC 60371-3-2, mica-based insulation, electrical insulation standard, CLC/CENELEC.

Standards Content (Sample)

SLOVENSKI SIST EN 60371-3-2:2006

STANDARD
julij 2006
Izolacijski materiali s sljudo – 3. del: Specifikacije posameznih snovi – 2. list:
Sljudni papir (IEC 60371-3- 2:2005)
Insulating materials based on mica - Part 3: Specifications for individual materials -
Sheet 2: Mica paper (IEC 60371-3- 2:2005)
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 60371-3-2
NORME EUROPÉENNE
February 2006
EUROPÄISCHE NORM
ICS 29.035.10; 29.035.50 Supersedes EN 60371-3-2:1995

English version
Insulating materials based on mica
Part 3: Specifications for individual materials
Sheet 2: Mica paper
(IEC 60371-3-2:2005)
Matériaux isolants à base de mica Isoliermaterialien aus Glimmer
Partie 3: Spécifications Teil 3: Bestimmungen
pour matériaux particuliers für einzelne Materialien
Feuille 2: Papier de mica Blatt 2: Glimmerpapier
(CEI 60371-3-2:2005) (IEC 60371-3-2:2005)

This European Standard was approved by CENELEC on 2005-12-01. 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, the Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the 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

© 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60371-3-2:2006 E
Foreword
The text of document 15/227/FDIS, future edition 2 of IEC 60371-3-2, prepared by IEC TC 15, Standards
on specifications for electrical insulating materials, was submitted to the IEC-CENELEC parallel vote and
was approved by CENELEC as EN 60371-3-2 on 2005-12-01.
This European Standard supersedes EN 60371-3-2:1995.
The main changes with regard to EN 60371-3-2:1995 include adjustments to align this standard with
changes included in the latest edition of EN 60371-2.
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) 2006-09-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2008-12-01
This European Standard makes reference to International Standards. Where the International Standard
referred to has been endorsed as a European Standard or a home-grown European Standard exists, this
European Standard shall be applied instead. Pertinent information can be found on the CENELEC web
site.
__________
Endorsement notice
The text of the International Standard IEC 60371-3-2:2005 was approved by CENELEC as a European
Standard without any modification.
__________
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
PRICE CODE
Commission Electrotechnique Internationale M
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
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.
...