SIST EN 60811-3-1:1999

SLOVENSKI STANDARD
SIST EN 60811-3-1:1999
01-julij-1999
0DWHULDOL]DL]ROLUDQMHLQRSODãþHQMHHOHNWULþQLKLQRSWLþQLKNDEORY6SORãQH
SUHVNXVQHPHWRGHGHO3RVHEQHPHWRGH]DSROLYLQLONORULGQHPDVH7ODþQL
SUHVNXVSULYLVRNLWHPSHUDWXUL3UHVNXVRGSRUQRVWLSURWLUD]SRNDQMX,(&
SRSUDYHNPDM
Insulating and sheathing materials of electric and optical cables - Common test methods
- Part 3-1: Methods specific to PVC compounds - Pressure test at high temperature -
Tests for resistance to cracking
Isolier- und Mantelwerkstoffe für Kabel und isolierte Leitungen - Allgemeine
Prüfverfahren - Teil 3-1: Verfahren für PVC-Mischungen - Wärmedruckprüfung -m
Prüfung der Rißbeständigkeit
Matériaux d'isolation et de gainage des câbles électriques et des câbles optiques -
Méthodes d'essais communes - Partie 3-1: Méthodes spécifiques pour les mélanges
PVC - Essai de pression à température élevée - Essais de resistance à la fissuration
Ta slovenski standard je istoveten z: EN 60811-3-1:1995
ICS:
29.035.20 3ODVWLþQLLQJXPHQLL]RODFLMVNL Plastics and rubber insulating
PDWHULDOL materials
29.060.20 Kabli Cables
SIST EN 60811-3-1:1999 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST EN 60811-3-1:1999

---------------------- Page: 2 ----------------------

SIST EN 60811-3-1:1999

---------------------- Page: 3 ----------------------

SIST EN 60811-3-1:1999

---------------------- Page: 4 ----------------------

SIST EN 60811-3-1:1999

---------------------- Page: 5 ----------------------

SIST EN 60811-3-1:1999

---------------------- Page: 6 ----------------------

SIST EN 60811-3-1:1999
NORME CEI
INTERNATIONALE IEC
811-3-1
INTERNATIONAL
Première édition
STAN DARD
First edition
1985
Méthodes d'essais communes pour les matériaux
d'isolation et de gainage des câbles électriques
Troisième partie:
Méthodes spécifiques pour les mélanges PVC
Section un — Essai de pression à température élevée —
Essais de résistance à la fissuration
Common test methods for insulating and sheathing
materials of electric cables
Part 3:
Methods specific to PVC compounds
Section One — Pressure test at high temperature —
Tests
for resistance to cracking
© CEI 1985 Droits de reproduction réservés — Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized
utilisée sous quelque forme que ce soit et par aucun procédé, in any form or by any means, electronic or mechanical,
électronique ou mécanique, y compris la photocopie et les including photocopying and microfilm, without permission
microfilms, sans l'accord écrit de l'éditeur. in writing from the publisher
Bureau central de la Commission Electrotechnique Internationale 3, rue de Varembé Genève Suisse
Commission Electrotechnique Internationale CODE PRIX
M
International Electrotechnical Commission PRICE CODE
IEC
MencnyHapoaHae 3neerporexHH4ecnae
Homuccvn
Pour prix, voir catalogue en vigueur
•
For price, see current catalogue

---------------------- Page: 7 ----------------------

SIST EN 60811-3-1:1999
Publications 811 de la C E I I E C Publications 811
(Premières éditions 1985) (First editions 1985)
Méthodes d'essais communes pour les maté- Common test methods for insulating and
riaux d'isolation et de gainage des câbles sheathing materials of electric cables
électriques
CORRIGENDUM 1
Dans l'annexe A. article .92 des Publications 811-1-1, 811-1-2, 811-1-3. 811-1-4, 811-3-1. 811-3-2
et l'annexe B. article B2 de la Publication 811-4-1, veuillez modifier conne indiqué le tableau
suivant :
Correspondance entre les articles des Publications 540, 811 et 885 de la C El*
540 811 885
Titre de l'article
dans la Publication 540*
Partie
Article Partie Section Article
Essais de décharges partielles - 2
3 - -
Mesure des épaisseurs et des dia-
mètres** 4 I I 8 -
Détermination des propriétés mécaniques
des mélanges pour enveloppes isolantes
I I -
et gaines 5 9
- . 6 I 2 8
Méthodes de vieillissement thermique
Essai de perte de masse des enveloppes
7 3 2 8 -
isolantes et gaines de PVC
Essai de pression à température élevée
pour enveloppes isolantes et gaines de
-
8 3 1 8
PVC
Essais à hasse température pour enve-
I 4 8 -
loppes isolantes et gaines de PVC . . 9
Essais de résistance à la fissuration des
I 9 -
enveloppes isolantes et gaines de PVC 10 3
Méthode de détermination de la masse
volumique des mélanges élastomères et -
Il 1 3 8 -
thermoplastiques
Mesure de l'indice de fluidité à chaud du
4 I -
polyéthylène thermoplastique 12 10
- 13 2 1 8
Essai de résistance à l'ozone
1 -
Essai d'allongement à chaud 14 2 9
Essai de résistance à l'huile minérale pour
1 10 -
les gaines à base d'élastomères 15 2
Essais électriques pour les cibles, les
conducteurs et les fils, pour une tension
16 - - - 1
inférieure ou égale à 450/750 V
Stabilité thermique des enveloppes iso-
-
lantes et des gaines de PVC 17 3 2 9
Mesure dans k PE du taux de noir de
4 I Il -
carbone et/ou des charges minérales . 18
I 3 9 -
Essais d'absorption d'eau 19
I 3 10 -
E.csai de rétraction 20
• Publication 540: Méthodes d'essais pour les enveloppes isolantes et les gaines des câbles électriques rigides et
souples (mélanges élastomères et thermoplastiques).
Publication 885: Méthodes d'essais électriques pour les câbles électriques.
•• Techniquement non identique.

---------------------- Page: 8 ----------------------

SIST EN 60811-3-1:1999
In Appendix A. Clause A2 of Publications 811-1-1, 811-1-2.811-1-3, 811-1-4, 811-3-1, 811-3-2 and
Appendix B, Clause B2 of Publication 811-4-1, please amend as follows the table below:
Corresponding clauses in I E C Publications 540, 811 and 885 *
540 811 885
Heading of clause
in Publication 540
•
Clause Part Section Clause Part
Partial discharge tests 3 - - - 2
Measurement of thicknesses and diam-
4 1 -
eters •• I 8
Tests for determining the mechanical
properties of insulating and sheathing
1 -
compounds 5 I 9
Thermal ageing methods 6 1 2 8 -
Loss of mass test for PVC insulations and
2 -
sheaths 7 3 8
Pressure test at high temperature for
PVC insulations and sheaths 8 3 1 . 8 -
Tests at low temperature for PVC insu-
-
lations and sheaths 9 I 4 8
Tests for resistance of PVC insulations
1 9 -
and sheaths to cracking 10 3
Method for determining the density of
elastomeric and thermoplastic com-
-
11 1 3 8
pounds
Measurement of the melt flow index of
thermoplastic polyethylene 12 4 I 10 -
1 -
Ozone resistance test 13 2 8
14 2 I 9 -
Hot set test
Mineral oil immersion test for elasto-
1 10 -
merit sheaths 15 2
Electrical tests for cables, cords and wires
for up and including
voltages to
1
450/750 V 16 - - -
Thermal stability of PVC insulations and
17 3 2 9 -
sheaths
Carbon black and/or mineral filler con-
4 1 -
tent in PE 18 11
19 I 3 9 -
Water absorption tests
20 1 3 10 -
Shrinkage test
• Publication 540: Test Methods for Insulations and Sheaths of Electric Cables and Cords (Elastomeric and
Thermoplastic Compounds).
Publication 885: Electrical Test Methods for Electric Cables.
•• Technically not identical.
May 1986
Mai 1986

---------------------- Page: 9 ----------------------

SIST EN 60811-3-1:1999
3
811-3-1 I E C 1985 CO
CONTENTS
Page
FOREWORD 5
PREFACE 5
Clause
1. Scope 7
Test values 7
2.
7
3. Applicability
Type tests and other tests 7
4.
Pre-conditioning 7
5.
7
6. Test temperature
Median value 9
7.
9 Pressure test at high temperature for insulations and sheaths
8.
Test for insulations 9
8.1
13
Test for sheaths 8.2
15
Test method using a dial micrometer 8.3
15 Tests for resistance of insulations and sheaths to cracking
9.
15
Heat shock test for insulations 9.1
19
Heat shock test for sheaths 9.2
FIGURES 20
538 and 540
A — Corresponding clauses or sub-clauses in I E C Publications
APPENDIX
23
and I E C Publication 811

---------------------- Page: 10 ----------------------

SIST EN 60811-3-1:1999
5 —
C) IEC 1 98 5 —
811-3-1
INTERNATIONAL ELECTROTECHNICAL COMMISSION
COMMON TEST METHODS FOR INSULATING
AND SHEATHING MATERIALS OF ELECTRIC CABLES
Part 3: Methods specific to PVC compounds
Section One — Pressure test at high temperature
Tests for resistance to cracking
FOREWORD
1) The formal decisions or agreements of the I E C 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.
2)
They have the form of recommendations for international use and they are accepted by the National Committees in that
sense.
3) In order to promote international unification, the I E C expresses the wish that all National Committees should adopt
the text of the I E C recommendation for their national rules in so far as national conditions will permit. Any divergence
between the I E C recommendation and the corresponding national rules should, as far as possible, be clearly indicated
in the latter.
PREFACE
This standard has been prepared by I E C Technical Committee No. 20: Electric Cables.
The text of this standard is based on the following documents:
Six Months' Rule Report on Voting
20(CO)158 20(CO)169
Further information can be found in the Report on Voting indicated in the table above.
The following I E C publications are quoted in this standard:
Publications Nos.: 538 (1976): Electric Cables, Wires and Cords: Methods of Test for Polyethylene Insulation
and Sheath.
538A (1980): First Supplement to Publication 538 — Additional Methods of Test for
Polyethylene Insulation and Sheath of Electric Cables, Wires and Cords Used in
Telecommunication Equipment and in Devices Employing Similar
Techniques.
540 (1982): Test Methods for Insulations and Sheaths of Electric Cables and Cords (Elas-
tomeric and Thermoplastic Compounds).
811-1-1 (1985): Common Test Methods for Insulating and Sheathing Materials of Electric
Cables, Part 1: Methods for General Application. Section One — Measurements
of Thickness and Overall Dimensions. Tests for Determining the Mechanical
Properties.
The complete standard, is to replace eventually I E C Publications 538 and 540. To enable users to compare the relevant
clauses in all three publications, a table of cross-references is given in Appendix A.

---------------------- Page: 11 ----------------------

SIST EN 60811-3-1:1999
— 7—
811-3-1 I E C 1985
CO
COMMON TEST METHODS FOR INSULATING
AND SHEATHING MATERIALS OF ELECTRIC CABLES
Part 3: Methods specific to PVC compounds
Section One — Pressure test at high temperature
Tests for resistance to cracking
1. Scope
This standard specifies the test methods to be used for testing polymeric insulating and
sheathing materials of electric cables for power distribution and telecommunications includ-
ing cables used on ships.
This Section One of Part 3 gives the methods for pressure test at high temperature and for
tests for resistance to cracking, which apply to PVC compounds.
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 standard may be modified by the relevant
cable standard to suit the needs of a particular type of cable.
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 standard are intended, in the first instance, to be used
for type tests. In certain 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.
Pre-conditioning
5.
All the tests shall be carried out not less than 16 h after the extrusion of the insulating or
sheathing compounds.
6. Test temperature
Unless otherwise specified, tests shall be carried out at room temperature.

---------------------- Page: 12 ----------------------

SIST EN 60811-3-1:1999
— 9 —
811-3-1 © I E C 1985
7. 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.
Pressure test at high temperature for insulations and sheaths
8.
ulations and sheaths less than 0.4 mm.
s
Note. — This test is not recommended for thicknesses of in
8.1 Test for insulations
8.1.1 Sampling
For each core to be tested, three adjacent pieces shall be taken from a sample having a
length of 250 mm to 500 mm. The length of each piece shall be 50 mm to 100 mm.
The cores of flat cords without sheaths shall not be separated.
8.1.2 Preparation of test pieces
From each core piece taken in accordance with Sub-clause 8.1.1, any covering including
semi-conducting layer, if any, shall be removed mechanically. According to the type of cable,
the test piece may have a circular or sector-shaped cross-section.
8.1.3 Position of each test piece in the test apparatus
The indentation device is shown in Figure 1, page 20, and consists of a rectangular blade
with an edge 0.70 ± 0.01 mm wide, which can be pressed against the test piece. Each test
piece shall be placed in the position shown in Figure 1. Flat cords without sheaths shall be
laid on their flat side. Test pieces having a small diameter shall be fixed on the support in
such a manner that they do not curve under the pressure of the blade. Test pieces of
sector-shaped cores shall be placed on a support provided with a fitting sector-shaped profile
as shown in Figure 1. The force shall be applied in a direction perpendicular to the axis of the
core; the blade shall also be perpendicular to the axis of the core.
Calculation of the compressing force
8.1.4
in newtons, which shall be exerted by the blade upon the test piece (of both
The force F,
round and sector-shaped cores) is given by the formula:
F=k .J 2 D8-82
where -
is a coefficient which shall be specified in the standard for the type of cable if a value is given, or, if a value is not
k
specified in the cable standard, shall be:
exible cables
k = 0.6 for flexible cords and cores of fl
15 mm, for cables for fixed installations
k = 0.6 for cores, with D
15 mm, and for sector-shaped cores for cables for fixed installations
k = 0.7 for cores, with D >
mean value of the thickness of the insulation of the test piece
8 =
D = mean value of the outer diameter of the test piece
are both expressed in millimetres, to one decimal place, and measured on a thin
8 and D
I E C Publi-
slice cut from the end of the test piece, as specified in the test method in
cation 811-1-1: Common Test Methods for Insulating and Sheathing Materials of Electric
Cables, Part 1: Methods for General Application. Section One — Measurements of Thick-
ness and Overall Dimensions. Tests for Determining the Mechanical Properties.

---------------------- Page: 13 ----------------------

SIST EN 60811-3-1:1999
811-3-1 © I E C 1985 — 11 —
is the mean value of the diameter of the "back" or circular part
For sector-shaped cores, D
of the sector, in millimetres, to one decimal place. This is determined from three measure-
ments, by means of a tape measure, of the circumference of the core assembly (the
measurements being made at three different places on the assembled cores).
The force applied upon the piece of flat cord without sheath shall be twice the value given
by the above formula, where D is the mean value of the minor dimension of the test piece
described in Sub-clause 8.1.1.
The calculated force may be rounded off down by not more than 3%.
8.1.5 Heating of the loaded test pieces
The test shall be carried out in air (i
...