EN 60811-1-1:1995
(Main)Insulating and sheathing materials of electric and optical cables - Common test methods - Part 1-1: General application - Measurement of thickness and overall dimensions - Tests for determining the mechanical properties
Insulating and sheathing materials of electric and optical cables - Common test methods - Part 1-1: General application - Measurement of thickness and overall dimensions - Tests for determining the mechanical properties
Gives the methods for measuring thicknesses and overall dimensions, and for determining the mechanical properties, which apply to the most common types of insulating and sheathing compounds (elastometic, PVC, PE, PP, etc.).
Isolier- und Mantelwerkstoffe für Kabel und isolierte Leitungen - Allgemeine Prüfverfahren - Teil 1-1: Allgemeine Anwendung - Messung der Wanddicke und der Außenmaße - Verfahren zur Bestimmung der mechanischen Eigenschaften
Matériaux d'isolation et de gainage des câbles électriques et des câbles optiques - Méthodes d'essais communes - Partie 1-1: Application générale - Mesure des épaisseurs et des dimensions extérieures - Détermination des propriétés mécaniques
Précise les méthodes d'essais à employer pour l'essai des matériaux polymères d'isolation et de gainage des câbles électriques pour la distribution d'énergie et les télécommunications, y compris les câbles utilisés à bord des navires.
Materiali za izoliranje in oplaščenje električnih in optičnih kablov - Splošne preskusne metode - 1-1. del: Področje uporabe – Merjenje debeline in splošnih mer - Preskusi za ugotavljanje mehanskih lastnosti (IEC 60811-1-1:1993)
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Standards Content (Sample)
SLOVENSKI STANDARD
01-julij-1999
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Insulating and sheathing materials of electric and optical cables - Common test methods
- Part 1-1: General application - Measurement of thickness and overall dimensions -
Tests for determining the mechanical properties
Isolier- und Mantelwerkstoffe für Kabel und isolierte Leitungen - Allgemeine
Prüfverfahren - Teil 1-1: Allgemeine Anwendung - Messung der Wanddicke und der
Außenmaße - Verfahren zur Bestimmung der mechanischen Eigenschaften
Matériaux d'isolation et de gainage des câbles électriques et des câbles optiques -
Méthodes d'essais communes - Partie 1-1: Application générale - Mesure des
épaisseurs et des dimensions extérieures - Détermination des propriétés mécaniques
Ta slovenski standard je istoveten z: EN 60811-1-1:1995
ICS:
29.035.01 Izolacijski materiali na Insulating materials in
splošno general
29.060.20 Kabli Cables
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
NORME
CEI
INTERNATIONALE
IEC
811-1-1
INTERNATIONAL
Deuxième édition
STANDARD
Second edition
1993-10
Méthodes d'essais communes pour les matériaux
d'isolation et de gainage des câbles électriques -
Partie 1:
Méthodes d'application générale -
Section 1: Mesure des épaisseurs et
des dimensions extérieures -
Détermination des propriétés mécaniques
Common test methods for insulating and
sheathing materials of electric cables -
Part 1:
Methods for general application
-
Section 1: Measurement of thickness and
overall dimensions -
Tests for determining the mechanical properties
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in writing from the publisher.
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811-1-1 ©IEC:1993 — 3 —
CONTENTS
Page
FOREWORD 5
Clause
1 Scope 7
1.1 Normative references 7
2 Test values 7
3 Applicability 9
4 Type tests and other tests 9
5 Pre-conditioning 9
6 Test temperature 9
7 Definitions 9
7.1 Maximum tensile force 9
7.2 Tensile stress 9
7.3 Tensile strength 9
7.4 Elongation at break 9
7.5 Median value 9
8 Measurement of thicknesses and overall dimensions 9
8.1 Measurement of insulation thickness 9
8.2 Measurement of thickness of non-metallic sheath 13
8.3 Measurement of overall dimensions 15
9 Tests for determining the mechanical properties of insulating and sheathing
compounds 17
9.1 Insulating compounds 17
9.2 Sheathing compounds 27
Figures 30
Annex
A Principle of operation of a typical machine for preparing test pieces 39
811-1-1 ©IEC:1993 - 5 -
INTERNATIONAL ELECTROTECHNICAL COMMISSION
COMMON TEST METHODS FOR INSULATING AND
SHEATHING MATERIALS OF ELECTRIC CABLES -
Part 1: Methods for general application -
Section 1: Measurement of thickness and overall dimensions -
Tests for determining the mechanical properties
FOREWORD
1)
The IEC (International Electrotechnical Commission) is a worldwide organization for standardization
comprising all national electrotechnical committees (IEC National Committees). The object of the IEC is to
promote international cooperation on all questions concerning standardization in the electrical and
electronic fields. To this end and in addition to other activities, the IEC publishes International Standards.
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. The 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 the IEC on technical matters, prepared by technical committees on
which all the National Committees having a special interest therein are represented, express, as nearly as
possible, an international consensus of opinion on the subjects dealt with.
3) They have the form of recommendations for international use
published in the form of standards, technical
reports or guides and they are accepted by the National Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
International Standard IEC 811-1-1 has been prepared by IEC technical committee 20:
Electric cables.
This second edition cancels and replaces the first edition published in 1985, the corrigendum
to the IEC 811 series, published in 1986, amendment No. 2, 1989, incorporating amend-
ment No. 1, 1988,
and constitutes a technical revision.
The text of this standard is based on the first edition (1985) and its amendment No. 2
(1989) (sub-clause 9.1.4 c)) as well as the following documents:
DIS
Report on voting
20(CO)205 20(CO)208
Full information on the voting for the approval of this standard can be found in the report
on voting indicated in the above table.
Annex A is for information only.
811-1-1 ©IEC:1993 - 7 -
COMMON TEST METHODS FOR INSULATING AND
SHEATHING MATERIALS OF ELECTRIC CABLES -
Part 1: Methods for general application -
Section 1: Measurement of thickness and overall dimensions -
Tests for determining the mechanical properties
1 Scope
The International Standard IEC 811-1 specifies the test methods to be used for testing
polymeric insulating and sheathing materials of electric cables for power distribution and
telecommunications including cables used on ships.
This section of IEC 811-1 gives the methods for measuring thicknesses and overall dimen-
sions, and for determining the mechanical properties, which apply to the most common
types of insulating and sheathing compounds (elastomeric, PVC, PE, PP, etc.).
1.1 Normative references
The following normative documents contain provisions which, through reference in this
text, constitute provisions of this section of IEC 811-1. At the time of publication of
this standard, the editions indicated were valid. All normative documents are subject to
revision, and pa
rties to agreements based on this section of IEC 811-1 are encouraged
to investigate the possibility of applying the most recent editions of the normative
documents indicated below. Members of IEC and ISO maintain registers of currently valid
International Standards.
IEC 811-1-2: 1985, Common test methods for insulating and sheathing materials of
electric cables - Part 1: Methods for general application - Section Two: Thermal ageing
methods
IEC 811-1-3: 1985,
Common test methods for insulating and sheathing materials of
electric cables - Pa rt 1: Methods for general application - Section Three: Methods for
determining the density - Water absorption tests - Shrinkage test
IEC 811-2-1: 1986,
Common test methods for insulating and sheathing materials of
electric cables - Part 2: Methods specific to elastomeric compounds - Section 1: Ozone
resistance test - Hot set test - Mineral oil immersion test
2 Test values
Full test conditions (such as temperatures, durations, etc.) and full test requirements are
not specified in this standard; it is intended that they should be specified by the standard
dealing with the relevant type of cable.
Any test requirements which are given in this section may be modified by the relevant
cable standard to suit the needs of a particular type of cable.
811-1-1 ©IEC:1993 - 9 -
3 Applicability
Conditioning values and testing parameters are specified for the most common types of
insulating and sheathing compounds and of cables, wires and cords.
4 Type tests and other tests
The test methods described in this section are intended, in the first instance, to be used for
type tests. In ce
rtain tests, where there are essential differences between the conditions
for type tests and those for more frequent tests, such as routine tests, these differences
are indicated.
5 Pre-conditioning
All the tests shall be carried out not less than 16 h after the extrusion or vulcanization (or
cross-linking), if any, of the insulating or sheathing compounds.
Unless otherwise specified, before any test, all test pieces, aged and unaged, shall be
kept for at least 3 h at a temperature of (23 ± 5) °C.
6 Test temperature
Unless otherwise specified, tests shall be made at ambient temperature.
7 Definitions
For the purposes of this section of IEC 811-1, the following definitions apply:
7.1 maximum tensile force:
Highest value reached by the load during the test.
7.2 tensile stress:
Tensile force per unit of the cross-sectional area of the unstretched
test piece.
7.3 tensile strength: Maximum tensile stress recorded in extending the test piece to
breaking point.
7.4
elongation at break: Increase of the reference length of the test piece, expressed
as the percentage of the reference length of the unstretched test piece, at breaking point.
7.5 median value:
When several test results have been obtained and ordered in an
increasing or decreasing succession, the median value is the middle value if the number
of available values is odd, and is the mean of the two middle values if the number is even.
8 Measurement of thicknesses and overall dimensions
8.1
Measurement of insulation thickness
8.1.1 General
Measurement of insulation thickness may be required as an individual test, or as a step
in the procedure for carrying out other tests, such as the determination of mechanical
properties.
811-1-1 ©
IEC:1993 - 11 -
In each case, the methods of selection of samples shall be in accordance with the relevant
cable standard.
8.1.2 Measuring equipment
A measuring microscope or a profile projector of at least 10 x magnification. Both types of
equipment shall allow a reading of 0,01 mm and an estimated reading to three decimal
places when measuring insulation with a specified thickness less than 0,5 mm.
In case of doubt, the measuring microscope shall be taken as the reference method.
8.1.3 Preparation of test pieces
Any covering shall be removed from the insulation, and the conductor(s), together with
separator (if any) shall be withdrawn, care being taken to avoid damage to the insulation.
Semi-conducting inner and/or outer layers, if bonded to the insulation, shall not be
removed.
Each test piece shall consist of a thin slice of insulation. The slice shall be cut with a
suitable device (sharp knife, razor blade, etc.) along a plane perpendicular to the longi-
tudinal axis of the conductor.
The cores of non-sheathed flat cords shall not be separated.
If the insulation carries an indented marking, thus giving rise to a local reduction in thick-
ness, the test piece shall be taken so as to include such marking.
8.1.4 Measuring procedure
The test piece shall be placed under the measuring equipment with the plane of the cut
perpendicular to the optical axis.
a) When the inner profile of the test piece is of circular form, six measurements shall
be made radially as shown in figure 1. For sector-shaped cores, six measurements
shall be made as shown in figure 2.
When the insulation is taken from a stranded conductor, six measurements shall be
b)
made radially as shown in figures 3 and 4.
When the outer profile shows unevenness, the measurement shall be carried out as
c)
shown in figure 5.
When there are unremovable screening layers under and/or over the insulation, they
d)
shall be excluded from the measurements.
If unremovable screening layers are present under and/or over an opaque insulation, a
measuring microscope shall be used.
e) Flat non-sheathed cords shall be measured according to figure 6, the thickness of
insulation in the direction of the other core being taken as half the distance between the
conductors.
In all cases, the first measurement shall be taken where the insulation is thinnest.
If the insulation carries an indented marking, this shall not be included in the measure-
ments made for the calculation of mean thickness. In any case, the thickness at the
position of the indented marking shall comply with the minimum requirement specified in
the relevant cable standard.
811-1-1 © IEC:1993 - 13 -
The readings shall be made in millimetres to two decimal places if the specified thickness
is 0,5 mm or above and to three estimated decimal places if the specified thickness of the
insulation is less than 0,5 mm.
8.1.5
Evaluation of the measurement results
The results shall be evaluated as specified in the test requirements of the relevant cable
standard.
In the case of mechanical tests, the mean value of the thickness, 8, of each test piece (see
item b1) of 9.1.4) shall be calculated from the six measurement results obtained on that
test piece.
8.2 Measurement of thickness of non-metallic sheath
8.2.1 General
The measurement of sheath thickness may be required as an individual test, or as a step
in the procedure for carrying out other tests
...
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