IEC 61628-2:1998+AMD1:2007 CSV

Corrugated pressboard and presspaper for electrical purposes - Part 2: Methods of test

Gives test methods (type and dimension of corrugation, dimensional changes on drying, compressive strength and compression modulus) for the materials classified in IEC 61628-1. This consolidated version consists of the first edition (1998) and its amendment 1 (2007). Therefore no need to order amendment in addition to this publication.

Cartons et papiers comprimés ondulés à usages électriques - Partie 2: Méthodes d'essais

Donne des méthodes d'essais (types et dimensions de l'ondulation, variation dimensionnelle au séchage, résistance à la compression et module de compression) applicables aux matériaux définis dans la CEI 61628-1. Cette version consolidée comprend la première édition (1998) et son amendement 1 (2007). Il n'est pas nécessaire de commander l'amendement avec cette publication.

General Information

• Status: Published
• Publication Date: 29-Jul-2007
• ICS: 29.035.10 - Paper and board insulating materials
• Technical Committee: TC 15 - Solid electrical insulating materials
• Current Stage: PPUB - Publication issued
• Start Date: 30-Jul-2007
• Completion Date: 30-Jul-2007

Standards Content (Sample)

INTERNATIONAL IEC
STANDARD
CEI
61628-2
NORME
Edition 1.1
INTERNATIONALE
2007-07
Edition 1:1998 consolidated with amendment 1:2007
Edition 1:1998 consolidée par l'amendement 1:2007
Corrugated pressboard and presspaper
for electrical purposes –
Part 2:
Methods of test
Cartons et papiers comprimés ondulés
à usages électriques –
Partie 2:
Méthodes d’essais
Reference number
Numéro de référence
IEC/CEI 61628-2:1998+A1:2007
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INTERNATIONAL IEC
STANDARD
CEI
61628-2
NORME
Edition 1.1
INTERNATIONALE
2007-07
Edition 1:1998 consolidated with amendment 1:2007
Edition 1:1998 consolidée par l'amendement 1:2007
Corrugated pressboard and presspaper
for electrical purposes –
Part 2:
Methods of test
Cartons et papiers comprimés ondulés
à usages électriques –
Partie 2:
Méthodes d’essais
PRICE CODE
CD
Commission Electrotechnique Internationale CODE PRIX
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue
Pour prix, voir catalogue en vigueur

– 2 – 61628-2 © IEC:1998+A1:2007
CONTENTS
FOREWORD.3
INTRODUCTION.5

1 Scope.6
2 Normative reference .6
3 General note on tests.6
4 Type and dimension of corrugation.6
5 Moisture content .8
6 Dimensional changes on drying.8
7 Compressive strength and compression modulus .9
8 Conductivity of aqueous extract .11

Figure 1 – Different types of corrugation.12
Figure 2 – Positioning of the test specimen.13
Figure 3 – Test specimen holder – Side view.13
Figure 4 – Curve of deflection versus force.14

61628-2 © IEC:1998+A1:2007 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
________
CORRUGATED PRESSBOARD AND PRESSPAPER
FOR ELECTRICAL PURPOSES –
Part 2: Methods of test
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
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patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61628-2 has been prepared by subcommittee 15C: Specifications,
of IEC technical committee 15: Insulating materials.
This consolidated version of IEC 61628-2 consists of the first edition (1998) [documents
15C/992/FDIS and 15C/1008/RVD] and its amendment 1 (2007) [documents 15/293/CDV and
15/340/RVC].
The technical content is therefore identical to the base edition and its amendment(s) and has
been prepared for user convenience.
It bears the edition number 1.1.
A vertical line in the margin shows where the base publication has been modified by
amendment 1.
– 4 – 61628-2 © IEC:1998+A1:2007
The committee has decided that the contents of the base publication and its amendments 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.
61628-2 © IEC:1998+A1:2007 – 5 –
INTRODUCTION
This part of IEC 61628 is one of a series which deals with corrugated pressboard and
presspaper for electrical purposes.
This series consists of three parts:
– IEC 61628-1:1997, Corrugated pressboard and presspaper for electrical purposes – Part 1:
Definitions, designations and general requirements
– IEC 61628-2:1998, Corrugated pressboard and presspaper for electrical purposes – Part 2:
Methods of test
– IEC 61628-3,— Corrugated pressboard and presspaper for electrical purposes – Part 3:
Specification for individual materials (under consideration)

– 6 – 61628-2 © IEC:1998+A1:2007
CORRUGATED PRESSBOARD AND PRESSPAPER
FOR ELECTRICAL PURPOSES –
Part 2: Methods of test
1 Scope
This part of IEC 61628 gives methods of test applicable for the materials classified in
IEC 61628-1.
2 Normative reference
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.
IEC 60641-2:2004, Pressboard and presspaper for electrical purposes – Part 2: Methods of
test
3 General note on tests
It is recommended to use a high-speed band saw with a cut width less than 1 mm to make the
test specimens. The burrs made by cutting should be carefully removed.
Unless otherwise specified, the test specimens after being cut, shall be conditioned according
to IEC 60641-2.
4 Type and dimension of corrugation
The shape and type of corrugation are defined by wavelength, maximum amplitude, the length
of horizontal parts, angle of slope and the board thickness out of which the corrugated material
is made (see figures 1a and 1b).
The following tests are made on the material as received.
4.1 Wavelength
4.1.1 Procedure
Cut at least three test samples, each test sample having a length greater than three complete
wavelengths.
With a pencil, mark the starting line of the first wavelength and the end line of the last
wavelength (minimum three wavelengths).
(The best starting and end line of a wavelength is the line of maximum amplitude for a sine
type corrugation and the centre of a horizontal part in an angular type corrugation.)
Lay the test sample on a flat surface with no strain applied.

61628-2 © IEC:1998+A1:2007 – 7 –
Measure with a ruler (precise to 0,5 mm) the distance between the pencil lines.
Divide the measured value by the number of wavelengths between the lines.
4.1.2 Results
Report the mean, minimum and maximum values of the measurements.
4.2 Amplitude
4.2.1 Procedure
Cut at least nine specimens, each being (100 ± 10) mm wide, and one-and-a-half to two
wavelengths in length, so that two full bottom peaks are included.
Lay the test specimens on a flat surface with no strain applied.
With a gauge (precise to 0,1 mm), measure the distance between the highest point and the
lowest point.
4.2.2 Results
Report the mean, minimum and maximum values of the measurements.
4.3 Length of horizontal parts of corrugation
4.3.1 Procedure
On at least three different corrugations, mark with a pencil the vertical projections of the
theoretical points where the oblique parts of the corrugation meet the horizontal part. The
pencil marks shall be positioned on a line in the direction of the corrugation wavelength.
Measure the distance between the pencil marks with a calliper precise to 0,1 mm (distance E in
figure 1b).
Repeat t
...