SIST EN 60626-3:2008

SLOVENSKI STANDARD
SIST EN 60626-3:2008
01-november-2008
1DGRPHãþD
SIST EN 60626-3:1998
SIST EN 60626-3:1998/A1:2001
.RPELQLUDQL]YLMDYLPDWHULDOL]DHOHNWULþQRL]RODFLMRGHO6SHFLILNDFLMH]D
SRVDPH]QHPDWHULDOH,(&
Combined flexible materials for electrical insulation - Part 3: Specifications for individual
materials (IEC 60626-3:2008)
Flexible Mehrschichtisolierstoffe zur elektrischen Isolation - Teil 3: Bestimmungen für
einzelne Materialien (IEC 60626-3:2008)
Matériaux combinés souples destinés à l'isolement électrique - Partie 3: Spécifications
pour matériaux particuliers (CEI 60626-3:2008)
Ta slovenski standard je istoveten z: EN 60626-3:2008
ICS:
29.035.01 Izolacijski materiali na Insulating materials in
splošno general
SIST EN 60626-3:2008 en,fr
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60626-3:2008

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SIST EN 60626-3:2008

EUROPEAN STANDARD
EN 60626-3

NORME EUROPÉENNE
August 2008
EUROPÄISCHE NORM

ICS 29.035.01 Supersedes EN 60626-3:1996 + A1:1999


English version


Combined flexible materials for electrical insulation -
Part 3: Specifications for individual materials
(IEC 60626-3:2008)


Matériaux combinés souples  Flexible Mehrschichtisolierstoffe
destinés à l'isolement électrique - zur elektrischen Isolation -
Partie 3: Spécifications Teil 3: Bestimmungen
pour matériaux particuliers für einzelne Materialien
(CEI 60626-3:2008) (IEC 60626-3:2008)




This European Standard was approved by CENELEC on 2008-08-01. 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, Bulgaria, 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


© 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60626-3:2008 E

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SIST EN 60626-3:2008
EN 60626-3:2008 – 2 –
Foreword
The text of document 15/442/FDIS, future edition 3 of IEC 60626-3, prepared by IEC TC 15 "Solid
electrical insulating materials", was submitted to the IEC-CENELEC parallel vote and was approved by
CENELEC as EN 60626-3 on 2008-08-01.
This European Standard supersedes EN 60626-3:1996 + A1:1999.
The main changes from EN 60626-3:1996 are as follows:
– consolidation of Amendment 1 published in 1999 which was mainly describing the sheets from 340 to
459;
– revision and reordering of previous tables of EN 60626-3:1996.
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) 2009-05-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2011-08-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60626-3:2008 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 60554-2 NOTE  Harmonized as EN 60554-2:2002 (not modified).
IEC 60641-2 NOTE  Harmonized as EN 60641-2:2004 (not modified).
IEC 60674-2 NOTE  Harmonized as EN 60674-2:1998 (not modified).
IEC 60819-2 NOTE  Harmonized as EN 60819-2:2001 (not modified).
__________

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SIST EN 60626-3:2008
– 3 – EN 60626-3:2008

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  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.

Publication Year Title EN/HD Year

IEC 60554-1 1977 Specification for cellulosic papers for - -
electrical purposes -
Part 1: Definitions and general requirements


IEC 60554-3 Series Specification for cellulosic papers for - -
electrical purposes -
Part 3: Specifications for individual materials


IEC 60626-1 1995 Combined flexible materials for electrical EN 60626-1 1995
insulation -
Part 1: Definitions and general requirements


IEC 60626-2 1995 Combined flexible materials for electrical EN 60626-2 1995
insulation -
Part 2: Methods of test


IEC 60641-1 2007 Pressboard and presspaper for electrical EN 60641-1 2008
purposes -
Part 1: Definitions and general requirements


IEC 60641-3-2 2007 Pressboard and presspaper for electrical EN 60641-3-2 2008
purposes -
Part 3: Specifications for individual
materials -
Sheet 2: Requirements for presspaper, types
P.2.1, P.4.1, P.4.2, P.4.3 and P.6.1


IEC 60674-1 1980 Specification for plastic films for electrical EN 60674-1 1998
purposes -
Part 1: Definitions and general requirements


IEC 60674-3-2 1992 Specification for plastic films for electrical EN 60674-3-2 1998
purposes -
Part 3: Specifications for individual
materials -
Sheet 2: Requirements for balanced biaxially
oriented polyethylene terephthalate (PET)
films used for electrical insulation


IEC 60674-3-4 to 6 1993 Specification for plastic films for electrical EN 60674-3-4 to 6 1995
purposes -
Part 3: Specifications for individual materials -
Sheets 4 to 6: Requirements for polyimide
films used for electrical insulation


IEC 60819-1 1995 Non-cellulosic papers for electrical EN 60819-1 1995
A1 1996 purposes - A1 1996
Part 1: Definitions and general requirements

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SIST EN 60626-3:2008
EN 60626-3:2008 – 4 –
Publication Year Title EN/HD Year

IEC 60819-3-1 2001 Non-cellulosic papers for electrical EN 60819-3-1 2001
purposes -
Part 3: Specifications for individual materials -
Sheet 1: Filled glass paper


IEC 60819-3-2 2001 Non-cellulosic papers for electrical EN 60819-3-2 2001
purposes -
Part 3: Specifications for individual materials -
Sheet 2: Hybrid inorganic-organic paper


IEC 60819-3-3 2006 Non-cellulosic papers for electrical EN 60819-3-3 2006
purposes -
Part 3: Specifications for individual materials -
Sheet 3: Unfilled aramid (aromatic polyamide)
papers

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SIST EN 60626-3:2008
IEC 60626-3
Edition 3.0 2008-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE


Combined flexible materials for electrical insulation –
Part 3: Specifications for individual materials

Matériaux combinés souples destinés à l'isolement électrique –
Partie 3: Spécifications pour matériaux particuliers

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
XB
CODE PRIX
ICS 29.035.01 ISBN 2-8318-9896-X
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST EN 60626-3:2008
– 2 – 60626-3 © IEC:2008
CONTENTS
FOREWORD.4
INTRODUCTION.6
1 Scope.7
2 Normative references.7
3 Requirements .8
4 Designation .8
5 Thermal classification .8
6 Specification sheets.8
Sheet 100 Requirements for combined flexible duplex materials of two layers    –
F-ET/P-C (23 μm PET film with presspaper or paper) .10
Sheet 101 Requirements for combined flexible duplex materials of two layers   –
F-ET/P-C (36 μm PET film with presspaper or paper) .12
Sheet 102 Requirements for combined flexible duplex materials of two layers   –
F-PET/P-C (50 μm PET film with presspaper or paper) .14
Sheet 110 Requirements for combined flexible triplex materials of three layers   –
P-C/F-PET/P-C (23 μm PET film with presspaper or paper) .16
Sheet 111 Requirements for combined flexible triplex materials of three layers   –
18
P-C/F-PET/P-C (36 μm PET film with presspaper or paper) .
Sheet 112 Requirements for combined flexible triplex materials of three layers   –
P-C/F-PET/P-C (50 μm PET film with presspaper or paper) .20
Sheet 113 Requirements for combined flexible triplex materials of three layers   –
P-C/F-PET/P-C (75 μm PET film with presspaper or paper) .22
Sheet 114 Requirements for combined flexible triplex materials of three layers  –
P-C/F-PET/P-C (100 μm PET film with presspaper or paper) .24
Sheet 115 Requirements for combined flexible triplex materials of three layers  –
P-C/F-PET/P-C (125 μm PET film with presspaper or paper) .26
Sheet 302 Requirements for combined flexible duplex materials of two layers   –
P-PAa/F-PET (50 μm aramid calendered paper with PET film) .28
Sheet 303 Requirements for combined flexible duplex materials of two layers   –
P-PAa/F-PET (80 μm aramid calendered paper with PET film) .30
Sheet 312 Requirements for combined flexible triplex materials of three layers  –
P-PAa/F-PET/P-PAa (50 μm aramid calendered paper on both sides of PET film) .32
Sheet 313 Requirements for combined flexible triplex materials of three layers  –
P-PAa/F-PET/P-PAa (80 μm aramid calendered paper on both sides of PET film) .34
Sheet 315 Requirements for combined flexible triplex materials of three layers  –
P-PAa/F-PET/P-PAa (130 μm aramid calendered paper on both sides of PET film) .36
Sheet 320 Requirements for combined flexible triplex materials of three layers  –
P-PAa/F-PET/P-PAa (130 μm aramid uncalendered paper on both sides of PET film) .38
Sheet 330 Requirements for combined flexible triplex materials of three layers  –
P-PAa/F-PI/P-PAa (aramid calendered paper on both sides of PI film) .40
Sheet 340 Requirements for combined flexible duplex materials of two layers   –
P-H/F-PET (hybrid inorganic-organic paper with PET film) .42
Sheet 350 Requirements for combined flexible triplex materials of three layers  –
P-H/F-PET/P-H (75 μm hybrid inorganic-organic paper on both sides of PET film) .44
Sheet 351 Requirements for combined flexible triplex materials of three layers  –
P-H/F-PET/P-H (125 μm hybrid inorganic-organic paper on both sides of PET film).46

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SIST EN 60626-3:2008
60626-3 © IEC:2008 – 3 –
Sheet 360 Requirements for combined flexible triplex materials of three layers  –
P-H/P-FG type 1/P-H (hybrid inorganic-organic paper on both sides of type 1 filled
glass paper).48
Sheet 400 Requirements for combined flexible duplex materials of two layers   –
P-FG type 1/F-PET (type 1 filled glass paper with 25 μm PET film) .50
Sheet 401 Requirements for combined flexible duplex materials of two layers   –
P-FG type 1/F-PET (type 1 filled glass paper with 50 μm PET film) .52
Sheet 402 Requirements for combined flexible duplex materials of two layers   –
P-FG type 1/F-PET (type 1 filled glass paper with 75 μm PET film) .54
Sheet 403 Requirements for combined flexible duplex materials of two layers   –
P-FG type 2/F-PET (type 2 filled glass paper with PET film).56
Sheet 410 Requirements for combined flexible duplex materials of two layers   –
P-FG type 1/C-G (type 1 filled glass paper with woven glass cloth) .58
Sheet 411 Requirements for combined flexible duplex materials of two layers   –
P-FG type 2/C-G (type 2 filled glass paper with woven glass cloth) .60
Sheet 420 Requirements for combined flexible triplex materials of three layers  –
P-FG type 1/F-PET/P-FG type 1 (type 1 filled glass paper on both sides of PET film) .62
Sheet 421 Requirements for combined flexible triplex materials of three layers  –
64
P-FG type 2/F-PET/P-FG type 2 (type 2 filled glass paper on both sides of PET film) .
Sheet 502 Requirements for combined flexible triplex materials of three layers  –
P-PET/F-PET/P-PET (50 μm PET mat on both sides of PET film) .66
Sheet 503 Requirements for combined flexible triplex materials of three layers  –
P-PET/F-PET/P-PET (75 μm PET mat on both sides of PET film) .68
Sheet 505 Requirements for combined flexible triplex materials of three layers  –
P-PET/F-PET/P-PET (125 μm PET mat on both sides of PET film) .70
Bibliography .72

9
Table 1 – Master listing for IEC 60626-3 sheet identification .

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SIST EN 60626-3:2008
– 4 – 60626-3 © IEC:2008
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

COMBINED FLEXIBLE MATERIALS
FOR ELECTRICAL INSULATION –

Part 3: Specifications for individual materials


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 60626-3 has been prepared by IEC technical committee 15: Solid
electrical insulating materials.
This third edition cancels and replaces the second edition published in 1996 and its
amendment 1 (1999), and constitutes a technical revision. The main changes from the previous
edition are as follows:
– consolidation of amendment 1 published in 1999 which was mainly describing the sheets
from 340 to 459;
– revision and reordering of previous tables of 1996 edition.

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SIST EN 60626-3:2008
60626-3 © IEC:2008 – 5 –
The text of this standard is based on the following documents:
FDIS Report on voting
15/442/FDIS 15/465/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.
A list of all the parts in the IEC 60626 series, under the general title Combined flexible
materials for electrical insulation, can be found on the IEC website.
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.

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SIST EN 60626-3:2008
– 6 – 60626-3 © IEC:2008
INTRODUCTION
This standard contains 31 sheets of Part 3, as follows:
100, 101, 102, 110, 111, 112, 113, 114, 115, 302, 303, 312, 313, 315, 320, 330, 340, 350, 351,
360, 400, 401, 402, 403, 410, 411, 420, 421, 502, 503, 505.

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SIST EN 60626-3:2008
60626-3 © IEC:2008 – 7 –
COMBINED FLEXIBLE MATERIALS
FOR ELECTRICAL INSULATION –

Part 3: Specifications for individual materials



1 Scope
This part of IEC 60626 specifies dimensional and performance requirements for individual
combined flexible materials for electrical insulation. This part is in the form of groups of sheets.
Sheets are numbered in accordance with Table 1, which provides a complete list of all the
specification sheets belonging to this standard.
Materials which conform to this specification meet established levels of performance. However,
the selection of material by a user for a specific application should be based on the actual
requirements necessary for adequate performance in that application and not based on this
specification alone.
SAFETY WARNING
It is the responsibility of the user of the methods contained or referred to in this document to
ensure that they are used in a safe manner.
2 Normative references
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.
The list of normative references is extensive because, in order to obtain a combination of two
or more materials for electrical insulation, it is necessary that those base materials (paper, film,
etc.) shall conform to the requirements set forth, in the appropriate specification of the base
material alone, for that purpose. This rule shall be applied also in the development of new
possible combinations; to this end, specifications of materials not actually used, but
referenced, may be eligible for future developments.
IEC 60554-1:1977, Specification for cellulosic papers for electrical purposes – Part 1:
Definitions and general requirements
IEC 60554-3 (all parts), Specification for cellulosic papers for electrical purposes – Part 3:
Specifications for individual materials
IEC 60626-1:1995, Combined flexible materials for electrical insulation – Part 1: Definitions and
general requirements
IEC 60626-2:1995, Combined flexible materials for electrical insulation – Part 2: Methods
of test
IEC 60641-1:2008, Pressboard and presspaper for electrical purposes – Part 1: Definitions and
general requirements
IEC 60641-3-2:2008, Pressboard and presspaper for electrical purposes – Part 3:
Specifications for individual materials – Sheet 2: Requirements for presspaper types P.2.1,
P.4.1, P.4.2, P.4.3 and P.6.1

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SIST EN 60626-3:2008
– 8 – 60626-3 © IEC:2008
IEC 60674-1:1980, Specification for plastic films for electrical purposes – Part 1: Definitions
and general requirements
IEC 60674-3-2:1992, Specification for plastic films for electrical purposes – Part 3:
Specifications for individual materials – Sheet 2: Requirements for balanced biaxially oriented
polyethylene terephthalate (PET) films used for electrical insulation
IEC 60674-3-4:1993, Specification for plastic films for electrical purposes – Part 3:
Specifications for individual materials – Sheet 4: Requirements for polyimide films used for
electrical insulation
IEC 60819-1:1995, Non-cellulosic papers for electrical purposes – Part 1: Definitions and
general requirements
Amendment 1 (1996)
IEC 60819-3-1:2001, Non-cellulosic papers for electrical purposes – Part 3: Specifications for
individual materials – Sheet 1: Filled glass paper
IEC 60819-3-2:2001, Non-cellulosic papers for electrical purposes – Part 3: Specifications for
individual materials – Sheet 2: Hybrid inorganic- organic paper
IEC 60819-3-3:2006, Non-cellulosic papers for electrical purposes – Part 3: Specifications for
individual materials – Sheet 3: Unfilled aramid (aromatic polyamide) papers
3 Requirements
In addition to complying with the general requirements of IEC 60626-1, each flexible combined
laminate shall conform to the requirements set forth in the appropriate sheet corresponding to
its type, as shown in the sheets of this standard.
4 Designation
Table 1 lists material designations and constructions appropriate to each sheet. Material
conforming to this specification shall be identified by a designation containing the IEC standard
number, the material designation from IEC 60626-1 and the nominal thickness. For example:
IEC 60626-3, Sheet 112, P-C/F-PET/P-C, 0,15 mm
5 Thermal classification
Performance experience provides information about the thermal capability of combined flexible
materials in electrical insulation systems. This information is given in each individual sheet.
Thermal classification information on these sheets is not to be considered as a requirement.
6 Specification sheets
The presently 31 sheets listed in the Introduction are organised according to the composition of
the laminates as described in the following master listing Table 1, including sections that could
be offered by the market in the future; therefore classification numbering is already provided
for future growth.

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SIST EN 60626-3:2008
60626-3 © IEC:2008 – 9 –
Table 1 – Master listing for IEC 60626-3 sheet identification
Sheet No. Flexible laminate composition
100 to 149 Paper or presspaper containing sulphate wood pulp fibres
100 to 109 Duplex with PET film
110 to 119 Triplex with PET film
a
120 to 149 Others
a
150 to 199 Paper or presspaper containing cotton fibres
a
150 to 159 Duplex with PET film
a
160 to 169 Triplex with PET film
a
170 to 199 Others
a
200 to 249 Paper or presspaper containing both cotton and wood pulp fibres
a
200 to 209 Duplex with PET film
a
210 to 219 Triplex with PET film
a
220 to 249 Others
250 to 299 Paper or presspaper containing other cellulosic fibres or mixtures of cellulosic and non-
a
cellulosic fibers
300 to 399 Wet-laid paper containing organic non-cellulosic fibres
300 to 309 Duplex calendered aramid with PET film
310 to 319 Triplex calendered aramid with PET film
320 to 329 Triplex uncalendered aramid with PET film
330 to 339 Triplex calendered aramid with PI film
340 to 349 Duplex hybrid organic-inorganic with PET film
350 to 359 Triplex hybrid organic-inorganic with PET film
360 to 369 Triplex hybrid organic-inorganic with filled glass paper
a
370 to 399 Others
400 to 499 Wet-laid paper containing inorganic fibres
400 to 459 Glass
a
460 to 499 Others
500 to 599 Dry-laid non-woven containing organic fibres
500 to 519 100 % PET-based fibres
a
520 to 539 100 % aramid-based fibres
a
540 to 599 Others
600 to 999 Other constructions
a
 Sections provided for future development of new specification sheets at present are void.
The specification sheets developed for the time being are: 100, 101, 102, 110, 111, 112, 113, 114,
115, 302, 303, 312, 313, 315, 320, 330, 340, 350, 351, 360, 400, 401, 402, 403, 410, 411, 420, 421,
502, 503, 505, and are given below.

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SIST EN 60626-3:2008
– 10 – 60626-3 © IEC:2008
Sheet 100

Requirements for combined flexible duplex materials of two layers –
F-PET/P-C (23 μm PET film with presspaper or paper)

1 Description
This sheet gives the requirements for duplex materials consisting of paper or presspaper
containing sulphate wood pulp fibres (P-C) laminated on a polyethylene terephthalate film
(F-PET) having a nominal thickness of 23 μm.
2 Thermal classification
Experience has shown that the combined flexible materials listed in this sheet may be suitable
for use in electrical apparatus with ratings up to and including the range of 120 °C to 130 °C.
3 Single-layer requirements
Use paper which meets the requirements for classes 1.1, 1.2, 1.3 or 1.4 of IEC 60554-1 and
IEC 60554-3. Alternatively, use presspaper which meets the requirements for P2, P4 or P6 of
IEC 60641-1 and IEC 60641-3-2. Each of these presspapers or papers can have a different
density, which will affect the nominal grammage of the laminate.
Use a PET film, which has a nominal thickness of 23 μm and meets the requirements of
IEC 60674-1 and IEC 60674-3-2.
4 Breakdown voltage requirements
For all laminates listed in Clause 5, the minimum electric breakdown voltage using 6 mm
diameter electrodes is
– for unfolded specimens: 6 kV;
– for folded specimens: 5 kV.
However, in accordance with IEC 60626-2, a minimum electric breakdown voltage on folded
specimens is not required for laminates of nominal thickness greater than 0,5 mm.
...