HD 632 S2:2008

SLOVENSKI STANDARD
01-marec-2009
1DGRPHãþD
SIST HD 632 S1:1999
SIST HD 632 S1:1999/A1:2002
Elektroenergetski kabli z ekstrudirano izolacijo in njihov pribor za nazivne
napetosti nad 36 kV (Um = 42 kV) in do 150 kV (Um = 170 kV)
Power cables with extruded insulation and their accessories for rated voltages above 36
kV (Um = 42 kV) up to 150 kV (Um = 170 kV)
Starkstromkabel mit extrudierter Isolierung und ihre Garnituren für Nennspannungen
über 36 kV (Um = 42 kV) bis 150 kV (Um = 170 kV)
Câbles d'énergie à isolation extrudée et leurs accessoires pour des tensions assignées
supérieures à 36 kV (Um = 42 kV) et jusqu'à 150 kV (Um = 170 kV)
Ta slovenski standard je istoveten z: HD 632 S2:2008
ICS:
29.060.20 Kabli Cables
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

HARMONIZATION DOCUMENT
HD 632 S2
DOCUMENT D'HARMONISATION
November 2008
HARMONISIERUNGSDOKUMENT
ICS 29.060.20 Supersedes HD 632 S1:1998 + A1:2002

English version
Power cables with extruded insulation and their accessories
for rated voltages above 36 kV (U = 42 kV) up to 150 kV (U = 170 kV)
m m
Câbles d'énergie à isolation extrudée  Starkstromkabel
et leurs accessoires mit extrudierter Isolierung
pour des tensions assignées und ihre Garnituren für Nennspannungen
supérieures à 36 kV (U = 42 kV) über 36 kV (U = 42 kV)
m m
et jusqu'à 150 kV (U = 170 kV) bis 150 kV (U = 170 kV)
m m
This Harmonization Document was approved by CENELEC on 2008-10-01. CENELEC members are bound to
comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for implementation of this
Harmonization Document at national level.

Up-to-date lists and bibliographical references concerning such national implementations may be obtained on
application to the Central Secretariat or to any CENELEC member.

This Harmonization Document exists in three official versions (English, French, German).

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. HD 632 S2:2008 E
Page 0-2
FOREWORD
This Harmonization Document was prepared by WG 9 of the Technical Committee CENELEC TC 20,
Electric cables.
The text of the draft was submitted to the Unique Acceptance Procedure and was approved by CENELEC
as HD 632 S2 on 2008-10-01.
This Harmonization Document supersedes HD 632 S1:1998 + corrigendum November 1998 and its
amendment A1:2002.
By comparison with the S1 version, this full revision of HD 632:

- uses IEC 60840, Ed 3, 2004, as its Part 1;
- amends Part 2 “Additional test methods” accordingly;
- revises the particular sections in Parts 3-11 inclusive in one of three ways, namely:

a) by presenting a fully updated section;
b) by indicating only those requirements that differ from, or add to, those of Part 1;
c) by withdrawing the section.

The consequential parts and particular sections are listed hereafter. In respect of the particular sections in
Parts 3 to 11, and by decision of the Technical Board (D68/047), National Committees need only
implement those sections having national applicability. The obligation remains however to announce the
full HD in public by titles and numbers, and also to withdraw any conflicting national standards.

Page numbering reflects the arrangements into Parts and Particular sections, e.g. Page 4-C-3 is page 3
of particular Section C of Part 4.

References to other HDs, ENs and international standards are given in the particular parts or sections.

By decision of the Technical Board (D81/139 extended by D104/118 & D114/076) this HD exists only in
English.
The following dates were fixed:

– latest date by which the existence of the HD
(doa) 2009-04-01
has to be announced at national level

– latest date by which the HD has to be implemented

at national level by publication of a harmonized
(dop) 2009-10-01
national standard or by endorsement

– latest date by which the national standards conflicting
(dow) 2011-10-01
with the HD have to be withdrawn

__________
Page 0-3
CONTENTS
PART 1 Test methods and requirements

PART 2 Additional test methods

PART 3 Test requirements for cables with XLPE
insulation and metallic screen and
their accessories
3-D Cables with XLPE insulation and copper
screen and their accessories (Test list 3D)
3-K Cables with XLPE insulation and copper
screen and their accessories (Test list 3K)
3-L Cables with XLPE insulation and metallic
screen and their accessories (Test list 3L)
3-M Cables with XLPE insulation, copper
screen and their accessories (Test list 3M)
3-N Cables with XLPE insulation and copper
screen and their accessories (Test list 3N)

PART 4 Test requirements for cables with XLPE
insulation, metallic screen and
metal-laminated sheath and their accessories

4-A Cables with XLPE insulation and polyolefine
compound sheath (Types 1, 2 and 3)(Test list 4A)
4-C Cables with XLPE insulation, copper or aluminium wires
screen and aluminium or copper-laminated sheath
and their accessories (Test list 4C)
4-D Cables with XLPE insulation, copper
screen and aluminium-laminated sheath
and their accessories (Test list 4D)
4-F Cables with XLPE insulation, copper
screen and aluminium-laminated sheath
and their accessories (Test list 4F)
4-G Cables with XLPE insulation and metal-
laminated screen and their accessories
(Test list 4G)
4-K Cables with XLPE insulation, copper
screen and aluminium-laminated sheath
and their accessories (Test list 4K)
4-L Cables with XLPE insulation, copper
screen and aluminium-laminated sheath
and their accessories (Test list 4L)
4-M Cables with XLPE insulation, copper
screen and aluminium-laminated sheath
and their accessories (Test list 4M)
4-O Cables with XLPE insulation, copper or
aluminium screen and copper or
aluminium laminated sheath and their
accessories (Test list 4O)
4-P Cables with XLPE insulation, copper
screen and metal-laminated sheath
and their accessories (Test list 4P)

PART 5 Test requirements for cables with XLPE
insulation and metallic sheath and
their accessories
Page 0-4
5-C Cables with XLPE insulation and lead or
lead alloy sheath, or aluminium or copper
sheath and their accessories
(Test list 5C)
5-D Cables with XLPE insulation and metallic
sheath and their accessories
(Test list 5D)
5-F Cables with XLPE insulation and lead or
lead alloy sheath and their accessories
(Test list 5F)
5-G Cables with XLPE insulation and lead
sheath and their accessories (Test list 5G)
5-H Cables with XLPE insulation and metallic
sheath and their accessories (Test list 5H)
5-K Cables with XLPE insulation and lead
sheath and their accessories (Test list 5K)
5-L Cables with XLPE insulation and metallic
sheath and their accessories (Test list 5L)
5-M Cables with XLPE insulation and metallic
sheath and their accessories (Test list 5M)
5-O Cables with XLPE insulation and metallic
sheath and their accessories (Test list 5O)
5-P Cables with XLPE insulation and lead alloy
sheath and their accessories (Test list 5P)

PART 6 Test requirements for cables with EPR
insulation and metallic screen and
their accessories
6-A Cables with HEPR insulation and polyolefine
compound sheath (Types 1, 2 and 3) (Test list 6A)
6-J Cables with HEPR insulation and copper
screen and their accessories (Test list 6J)
6-O Cables with EPR insulation and copper or
aluminium screen and their accessories
(Test list 6O)
PART 7 Test requirements for cables with EPR
insulation, metallic screen and
metal-laminated sheath and their accessories

7-O Cables with EPR insulation, copper or
aluminium screen and copper or aluminium-
laminated sheath and their accessories
(Test list 7O)
Page 0-5
PART 8 Test requirements for cables with EPR
insulation and metallic sheath and
their accessories
8-J Cables with HEPR insulation and metallic
sheath and their accessories (Test list 8J)
8-O Cables with EPR insulation and metallic
sheath and their accessories (Test list 8O)

PART 9 (Spare)
PART 10 Test requirements for cables with PE or
HDPE insulation, metallic screen and
metal-laminated sheath and their accessories

10-G Cables with PE or HDPE insulation and metal-
laminated screen and their accessories
(Test list 10G)
PART 11 Test requirements for cables with PE or
HDPE insulation and metallic sheath and
their accessories
11-G Cables with PE or HDPE insulation and lead
sheath and their accessories (Test list 11G)

__________
Page 0-6
– Blank Page –
Page 1-1
PART 1
CONTENTS
1 Scope . 4
2 Normative re f e r enc es . 4
3 Definitions . 5
3.1 Definitions of dimensional values (thicknesses, cross-sections, etc.) . 5
3.2 Definitions concerning the tests . 5
4 Voltage designations and materials . 6
4.1 Rated voltages . 6
4.2 Cable insulating m aterials . 6
4.3 Cable oversheathing materials . 6
5 Precautions against water penetration in cables . 6
6 Cable characteristics . 7
7 Accessory characteristics. 7
8 Test conditions . 8
8.1 Ambient temperature . 8
8.2 Frequency and waveform of power frequency test voltages . 8
8.3 Waveform of lightning impulse test voltages . 8
8.4 Relationship of test voltages to rated voltages . 8
8.5 Determination of the cable conductor temperature . 8
9 Routine tests on cables and on the main insulation of prefabricated accessories . 8
9.1 General . 8
9.2 Partial discharge test . 9
9.3 Voltage test . 9
9.4 Electrical test on oversheath of the cable . 9
10 Sample tests on cables . 9
10.1 General . 9
10.2 Frequency of tests . 10
10.3 Repetition of tests . 10
10.4 Conductor examination . 10
10.5 Measurement of electrical resistance of conductor and metallic screen . 10
10.6 Measurement of thickness of cable insulation and oversheath . 10
10.7 Measurement of thickness of metallic sheath . 11
10.8 Measurement of diameter . 12
10.9 Hot set test for XLPE, EPR and HEPR insulations . 12
10.10 Measurement of capacitance . 13
10.11 Measurement of density of HDPE insulation . 13
11 Sample tests on accessories . 13
11.1 Tests on components . 13
11.2 Tests on complete accessory . 13
12 Type tests on cable systems . 14
12.1 Range of type approval . 14
12.2 Summary of type tests . 14
12.3 Electrical type tests on complete cable systems . 15
12.4 Non-electrical type tests on cable components and on completed cable . 18

Page 1-2
PART 1
13 Type tests on cables . 23
13.1 Range of type approval . 24
13.2 Summary of type tests . 24
13.3 Electrical type tests on completed cables . 24
14 Type tests on accessories . 25
14.1 Range of type approval . 25
14.2 Summary of type tests . 26
14.3 Electrical type tests on accessories . 26
15 Electrical tests after insta llation . 27
15.1 DC voltage test of the oversheath . 27
15.2 AC voltage test of the insulation . 27
Annex A (informative) Determination of the cable conductor temperature . 34
Annex B (normative) Rounding of numbers . 38
Annex C (informative) Summary of type tests of cable systems, of cables and of
accessories . 39
Annex D (normative) Method of measuring resistivity of semi-conducting screens . 40
Annex E (normative) Determination of hardness of HEPR insulations . 42
Annex F (normative) Water penetration test . 44
Annex G (normative) Tests on components of cables with a longitudinally applied metal
foil . 46
Annex H (normative) Tests of outer protection for buried joints . 49
Bibliography . 51

Figure A.1 – Typical test set-up for the reference loop and the main test loop . 35
Figure A.2 – Arrangement of the thermocouples on the conductor of the reference loop . 36
Figure D.1 – Preparation of samples for measurement of resistivity of conductor and
insulation s c r eens . 41
Figure E.1 − Test on surfaces of large radius of curvature . 43
Figure E.2 − Test on surfaces of small radius of curvature . 43
Figure F.1 – Schematic diagram of apparatus for water penetration test . 45
Figure G.1 − Adhesion of metal foil . 46
Figure G.2 − Example of overlapped metal f o il . 47
Figure G.3 − Peel strength of overlapped metal foil . 47

Table 1 – Insulating compounds for cables . 27
Table 2 – Oversheathing compounds for cables . 28
Table 3 – Tan δ requirements for insulating compounds for cables . 28
Table 4 – Test voltages . 28
Table 5 – Non-electrical type tests for insulating and oversheathing compounds for
cables . 29
Table 6 – Test requirements for mechanical characteristics of insulating compounds for
cables (before and after ageing) . 30
Table 7 – Test requirements for mechanical characteristics of oversheathing
compounds for cables (before and after ageing) . 31

Page 1-3
PART 1
Table 8 – Test requirements for particular characteristics of insulating compounds for
cables . 32
Table 9 – Test requirements for particular characteristics of PVC oversheathing
compounds for cables . 33
Table C.1 − Type tests on cable systems, on cables and on accessories . 39
Table H.1 – Impulse voltage tests . 50

Page 1-4
PART 1
POWER CABLES WITH EXTRUDED INSULATION AND THEIR
ACCESSORIES FOR RATED VOLTAGES ABOVE 36 kV (U = 42 kV)
m
UP TO 150 kV (U = 170 kV) –
m
TEST METHODS AND REQUIREMENTS
1 Scope
This standard specifies test requirements for power cables with extruded insulation, of the
types listed in Table 1, and their accessories, of rated voltage, U, above 36 kV (U = 42 kV) up
m
to and including 150 kV (U = 170 kV), for fixed installations intended for transmission and
m
distribution systems, and for use in power generating plants and sub-stations.
Depending on the design and the system conditions, additional or even fewer tests or other
requirements which are not described in the Part 1 can be specified in the particular sections of
Parts 3 to 11.
In these parts each section is either:
1) A full tabulation showing how the particular section either agrees, or deviates from,
each clause of Part 1; or
2) A reduced tabulation showing only those places where the particular section deviates
from Part 1.
The requirements apply to single-core cables and three-core cables with separate cores and to
their accessories for usual conditions of installation and operation, but not to special cables
and their accessories, such as those designed for submarine cables, for which modification to
the standard tests may be necessary or special test conditions may need to be devised.
This standard does not cover transition joints between cables with extruded insulation and
paper insulated cables.
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.
EN 60228 Conductors of insulated cables (IEC 60228)
EN 60229 Tests on cable oversheaths which have a special protective function
and are applied by extrusion (IEC 60229)
EN 60230 Impulse tests on cables and their accessories (IEC 60230)
EN 60332-1-2 Tests on electric and optical fibre cables under fire conditions –
Part 1-2: Test for vertical flame propagation for a single insulated wire
or cable – Procedure for 1 kW pre-mixed flame (IEC 60332-1-2)
EN 60811 (Series) Insulating and sheathing materials of electric and optical fibre cables –
Common test methods (IEC 60811 Series)
EN 60885 (Series) Electrical test methods for electric cables (IEC 60885 Series)

Page 1-5
PART 1
HD 588.1 High voltage test techniques - Part 1: General definitions and test
requirements (Endorsing IEC 60060-1)
HD 605 Electric cables: Additional test methods
IEC 60183 Guide to selection of high voltage cables
IEC 60287-1-1:2006 Electric cables – Calculation of the current rating – Part 1: Current
rating equations (100 % load factor) and calculation of losses –
Section 1: General
1)
ISO 48:1994 Rubber, vulcanized or thermoplastic - Determination of hardness
(hardness between 10 IRHD and 100 IRHD)
3 Definitions
For the purposes of this document, the following definitions apply.
3.1 Definitions of dimensional values (thicknesses, cross-sections, etc.)
3.1.1
nominal value
value by which a quantity is designated and which is often used in tables
NOTE Usually, in this standard, nominal values give rise to values to be checked by measurements taking into
account specified tolerances.
3.1.2
median value
when several test results have been obtained and ordered in an increasing (or decreasing)
succession, middle value if the number of available values is odd, and mean of the two middle
values if the number is even
3.2 Definitions concerning the tests
3.2.1
routine tests
tests made by the manufacturer on each manufactured component (length of cable or
accessory) to check that the component meets the specified requirements
3.2.2
sample tests
tests made by the manufacturer on samples of completed cable or components taken from a
completed cable or accessory, at a specified frequency, so as to verify that the finished product
meets the specified requirements
3.2.3
type tests
tests made before supplying on a general commercial basis a type of cable system or cable or
accessory covered by this standard, in order to demonstrate satisfactory performance
characteristics to meet the intended application. Once successfully completed, these tests
need not be repeated, unless changes are made in the cable or accessory materials, or design
or manufacturing process which might change the performance characteristics
________
1)
ISO 48:1994 is superseded by ISO 48:2007.

Page 1-6
PART 1
3.2.4
electrical tests after installation
tests made to demonstrate the integrity of the cable system as installed
3.3
cable system
cable with installed accessories
3.4
nominal electrical stress
electrical stress calculated at U using nominal dimensions

4 Voltage designations and materials
4.1 Rated voltages
In this standard, the symbols U , U and U are used to designate the rated voltages of cables
0 m
and accessories where these symbols have the meanings given in IEC 60183.
4.2 Cable insulating materials
This standard applies to cables insulated with one of the materials listed in Table 1. It also
specifies for each type of insulating compound the maximum operating conductor temperatures
on which the specified test conditions are based.
4.3 Cable oversheathing materials
Tests are specified for four types of oversheath, as follows:
– ST and ST based on polyvinyl chloride;
1 2
– ST and ST based on polyethylene.
3 7
The choice of the type of oversheath depends on the design of the cable and the mechanical
and thermal constraints during installation and operation.
The maximum conductor temperatures in normal operation for the different types of
oversheathing materials covered by this standard are given in Table 2.
5 Precautions against water penetration in cables
When cable systems are installed in ground, easily flooded galleries or water, a radial water
impermeable barrier around the cable is recommended.
NOTE A test for radial water penetration is not currently available.
Longitudinal water barriers may also be applied to avoid the need to replace long sections of
cable in case of damage in the presence of water.
A test for longitudinal water penetration is given in 12.4.18.

Page 1-7
PART 1
6 Cable characteristics
For the purpose of carrying out the cable system or cable tests described in this standard and
recording the results, the cable shall be identified. The following characteristics shall be known
or declared.
a) Name of manufacturer, type, designation and manufacturing date or date code.

b) Rated voltage: values shall be given for U , U, U (see 4.1 and 8.4).
0 m
c) Type of conductor, its material and nominal cross-sectional area, in square millimetres. If
the nominal cross-sectional area is not in accordance with EN 60228, the d.c. conductor
resistance and the conductor construction shall be declared. Presence, if any, and nature of
measures taken to achieve longitudinal watertightness.
d) Material and nominal thickness of insulation (see 4.2). If the insulation is XLPE, special
additives shall be declared if the higher value of tan δ according to Table 3 is applicable.
e) Type of manufacturing process for insulation system.
f) Presence, if any, and nature of watertightness measures in the screening area.
g) Material and construction of metallic screen, e.g. number and diameter of wires. The d.c.
resistance of the metallic screen shall be declared. Material, construction and nominal
thickness of metallic sheath, or longitudinally applied metal foil, if any.
h) Material and nominal thickness of oversheath.
i) Nominal diameter of the conductor (d).
j) Nominal overall diameter of the cable (D).
k) Inner and outer nominal diameters of the insulation.
l) Nominal capacitance between conductor and metallic screen/sheath.
7 Accessory characteristics
For the purpose of carrying out the cable system or accessory tests described in this standard
and recording the results, the accessory shall be identified. The following characteristics shall
be known or declared.
a) Cables used for testing accessories shall be correctly identified as in Clause 6.
b) Conductor connections used within the accessories shall be correctly identified, where
applicable, with respect to
– assembly technique;
– tooling, dies and necessary setting;
– preparation of contact surfaces;
– type, reference number and any other identification of the connector;
– details of the type test approval of the connector.
c) Accessories to be tested shall be correctly identified with respect to
– name of manufacturer;
– type, designation and manufacturing date or date code;
– rated voltage (see 6 b) above);
– installation instructions (reference and date).

Page 1-8
PART 1
8 Test conditions
8.1 Ambient temperature
Unless otherwise specified in the details for the particular test, tests shall be carried out at an
ambient temperature of (20 ± 15) °C.
8.2 Frequency and waveform of power frequency test voltages
Unless otherwise indicated in this standard, the frequency of the alternating test voltages shall
be in the range 49 Hz to 61 Hz. The waveform shall be substantially sinusoidal. The values
quoted are r.m.s. values.
8.3 Waveform of lightning impulse test voltages
In accordance with EN 60230, the front time of the standard lightning impulse voltage shall be
between 1 µs and 5 µs. The time to half value shall be 50 µs ± 10 µs as specified in HD 588-1.
8.4 Relationship of test voltages to rated voltages
Where test voltages are specified in this standard as multiples of the rated voltage U , the
value of U for the determination of the test voltages shall be as specified in Table 4.
For cables and accessories of rated voltages not shown in the table, the value of U for
determination of test voltages may be the same as for the nearest rated voltage which is given,
provided that the value of U for the cable and accessory is not higher than the corresponding
m
value in the table. Otherwise, and particularly if the rated voltage is not close to one of the
values in the table, the value of U on which the test voltages are based shall be the rated
value, i.e. U divided by 3.
The test voltages in this standard are based on the assumption that the cables and
accessories are used on systems of category A or B, as defined in IEC 60183.
8.5 Determination of the cable conductor temperature
It is recommended that one of the test methods described in Annex A is used to determine the
actual conductor temperature.
9 Routine tests on cables and on the main insulation of prefabricated
accessories
9.1 General
The following tests shall be carried out on each manufactured length of cable:
a) partial discharge test (see 9.2);
b) voltage test (see 9.3);
c) electrical test on oversheath of the cable, if required (see 9.4).
The order in which these tests are carried out is at the discretion of the manufacturer.
The main insulation of each prefabricated accessory shall undergo partial discharge (see 9.2)
and voltage (see 9.3) tests according to either 1), 2) or 3) below:
1) on accessories installed on cable;

Page 1-9
PART 1
2) by using a host accessory into which a component of an accessory is substituted for test;
3) by using a simulated accessory rig in which the electrical stress environment of a main
insulation component is reproduced.
In cases 2) and 3), the test voltage shall be selected to obtain electrical stresses at least the
same as those on the component in a complete accessory when subjected to the test voltages
specified in 9.2 and 9.3.
NOTE The main insulation of prefabricated accessories consists of the components that come in direct contact
with the cable insulation and are necessary to control the electric stress distribution in the accessory. Examples are
premoulded or precast elastomer or filled epoxy resin insulating components that may be used singly or jointly to
provide the necessary insulation or screening of accessories.
9.2 Partial discharge test
The partial discharge test shall be carried out in accordance with EN 60885-3 for cables,
except that the sensitivity as defined in EN 60885-3 shall be 10 pC or better. Testing of
accessories follows the same principles, but the sensitivity shall be 5 pC or better.
The test voltage shall be raised gradually to and held at 1,75 U for 10 s and then slowly
reduced to 1,5 U (see Table 4, column 5).
There shall be no detectable discharge exceeding the declared sensitivity from the test object
at 1,5 U .
9.3 Voltage test
The voltage test shall be made at ambient temperature using an alternating test voltage at
power frequency.
The test voltage shall be raised gradually to 2,5 U (see Table 4, column 4) and then be held
for 30 min between the conductor and metallic screen/sheath.
No breakdown of the insulation shall occur.
9.4 Electrical test on oversheath of the cable
When the test is required by the particular contract, the cable oversheath shall be subjected to
the electrical test specified in Clause 3 of EN 60229.
10 Sample tests on cables
10.1 General
The following tests shall be carried out on samples which, for the tests in items b) and g), may
be drum lengths of cable, taken to represent batches:
a) conductor examination (see 10.4);
b) measurement of electrical resistance of conductor and of metallic screen (see 10.5);
c) measurement of thickness of insulation and oversheath (see 10.6);
d) measurement of thickness of metallic sheath (see 10.7);
e) measurement of diameters, if required (see 10.8);
f) hot set test for XLPE, EPR and HEPR insulations (see 10.9);
g) measurement of capacitance (see 10.10);
h) measurement of density of HDPE insulation (see 10.11);

Page 1-10
PART 1
i) water penetration test, if applicable (see 12.4.18);
j) tests on components of cables with a longitudinally applied metal foil (see 12.4.19).
10.2 Frequency of tests
The sample tests in items a) to h) of 10.1 shall be carried out on one length from each batch
(manufacturing series) of the same type and cross-section of cable, but shall be limited to not
more than 10 % of the number of lengths in any contract, rounded to the nearest whole
number.
The frequency of the tests in items i) and j) of 10.1 shall be in accordance with agreed quality
control procedures. In the absence of such an agreement, one test shall be made for contracts
with a cable length above 20 km.
10.3 Repetition of tests
If the sample from any length selected for the tests fails in any of the tests in 10.1, further
samples shall be taken from two further lengths of the same batch and subjected to the same
tests as those in which the original sample failed. If both additional samples pass the tests, the
other cables in the batch from which they were taken shall be regarded as having complied
with the requirements of this standard. If either fail, this batch of cables shall be regarded as
having failed to comply.
10.4 Conductor examination
Compliance with the requirements of EN 60228 for conductor construction, or the declared
construction, shall be checked by inspection and measurement when practicable.
10.5 Measurement of electrical resistance of conductor and metallic screen
The cable length, or a sample thereof, shall be placed in the test room, which shall be
maintained at a reasonably constant temperature for at least 12 h before the test. If there is a
doubt that the conductor or metallic screen temperature is not the same as the room
temperature, the resistance shall be measured after the cable has been in the test room for
24 h. Alternatively, the resistance can be measured on a sample of conductor or metallic
screen, conditioned for at least 1 h in a temperature-controlled liquid bath.
The d.c. resistance of the conductor or metallic screen shall be corrected to a temperature of
20 °C and 1 km length in accordance with the formulae and factors given in EN 60228. For
screens other than copper or aluminium, temperature coefficients and correction formulae shall
be taken respectively from Table 1 and 2.1.1 of IEC 60287-1-1.
The d.c. resistance of the conductor at 20 °C shall not exceed either the appropriate maximum
value specified in EN 60228 or the declared value.
The d.c. resistance of the metallic screen at 20 °C shall not exceed the declared value.
10.6 Measurement of thickness of cable insulation and oversheath
10.6.1 General
The test method shall be in accordance with Clause 8 of EN 60811-1-1.
Each cable length selected for the test shall be represented by a piece taken from one end
after having discarded, if necessary, any portion that may have suffered damage.

Page 1-11
PART 1
10.6.2 Requirements for the insulation
The lowest measured thickness shall not fall below 90 % of the nominal thickness:
t ≥ 0,90 t
min n
tt−
max min
and additionally: ≤ 0,15
t
max
where
t is the maximum thickness, in millimetres;
max
t is the minimum thickness, in millimetres;
min
t is the nominal thickness, in millimetres.
n
NOTE t and t are measured at the same cross-section of the insulation.
max min
The thickness of the semi-conducting screens on the conductor and over the insulation shall
not be included in the thickness of the insulation.
10.6.3 Requirements for the cable oversheath
The lowest measured thickness shall not fall below 85 % of the nominal thickness by more than
0,1 mm:
t ≥ 0,85 t – 0,1
min n
where
t is the minimum thickness, in millimetres;
min
t is the nominal thickness, in millimetres.
n
In addition, for oversheaths applied onto a substantially smooth surface, the average of the
measured values rounded to 0,1 mm in accordance with Annex B shall be not less than the
nominal thickness.
The latter requirement does not apply to oversheaths applied onto an irregular surface, such as
one formed by metallic screens of wires and/or tapes or corrugated metallic sheath.
10.7 Measurement of thickness of metallic sheath
The following tests apply if the cable has a metallic sheath of lead, lead alloy or aluminium.
10.7.1 Lead or lead alloy sheath
The minimum thickness of the sheath shall not fall below 95 % of the nominal thickness by
more than 0,1 mm:
t ≥ 0,95 t – 0,1
min n
The thickness of the sheath shall be measured by one of the following methods, at the
discretion of the manufacturer.
10.7.1.1 Strip method
The measurement shall be made with a micrometer with plane faces of 4 mm to 8 mm
diameter and an accuracy of ± 0,01 mm.

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PART 1
The measurement shall be made on a test piece of sheath about 50 mm in length removed
from the completed cable. The piece shall be slit longitudinally and carefully flattened. After
cleaning the test piece, a sufficient number of measurements shall be made along the
circumference of the sheath and not less than 10 mm away from the edge of the flattened
piece to ensure that the minimum thickness is measured.
10.7.1.2 Ring method
The measurements shall be made with a micrometer having either one flat nose and one ball
nose, or one flat nose and a flat rectangular nose 0,8 mm wide and 2,4 mm long. The ball nose
or the flat rectangular nose shall be applied to the inside of the ring. The accuracy of the
micrometer shall be ± 0,01 mm.
The measurements shall be made on a ring of the sheath carefully cut from the sample. The
thickness shall be determined at a sufficient number of points around the circumference of the
ring to ensure that the minimum thickness is measured.
10.7.2 Plain or corrugated aluminium sheath
The minimum thickness of the sheath shall not fall below 90 % of the nominal thickness by
more than 0,1 mm for plain aluminium sheath:
t ≥ 0,9 t – 0,1
min n
and 85 % of the nominal thickness by more than 0,1 mm for corrugated aluminium sheath:
t ≥ 0,85 t – 0,1
min n
The measurements shall be made with a micrometer having ball noses of radii about 3 mm.
The accuracy shall be ± 0,01 mm.
The measurements shall be made on a ring of the sheath, about 50 mm wide, carefully
removed from the completed cable. The thickness shall be determined at a sufficient number
of points around the circumference of the ring to ensure that the minimum thickness is
measured.
10.8 Measurement of diameter
If the purchaser requires that the diameter of the core and/or the overall diameter of the cable
shall be measured, the measurements shall be carried out in accordance with 8.3 of
EN 60811-1-1.
10.9 Hot set test for XLPE, EPR and HEPR insulations
10.9.1 Procedure
The sampling and test procedure shall be carried out in accordance with Clause 9 of
EN 60811-2-1, employing the test conditions given in Table 8.
The test pieces shall be taken from that part of the insulation where the degree of cross-linking
is considered to be the lowest for the curing process employed.
10.9.2 Requirements
The test results shall comply with the requirements given in Table 8.

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PART 1
10.10 Measurement of capacitance
The capacitance shall be measured between conductor and metallic screen/sheath.
The measured value shall not exceed the nominal value declared by the manufacturer by more
than 8 %.
10.11 Measurement of density of HDPE insulation
10.11.1 Procedure
The density of HDPE shall be measured using the sampling and test procedure given in
Clause 8 of EN 60811-1-3.
10.11.2 Requirements
The results of the test shall comply with the requirements given in Table 8.
11 Sample tests on accessories
11.1 Tests on components
The characteristics of each component shall be verified in accordance with the specifications of
the accessories manufacturer, either through test reports from the supplier of a given
component or through internal tests.
The manufacturer of a given accessory shall provide a list of the tests to be performed on each
component, indicating the frequency of each test. The components shall be inspected against
their drawings. There shall be no deviations outside the declared tolerances.
NOTE As components differ from one supplier to another, it is not possible to define common sample tests on
components in this standard.
11.2 Tests on complete accessory
For accessories where the main insulation cannot be routine tested (see 9.1), the following
electrical tests shall be carried out by the manufacturer on a fully assembled accessory:
a) partial discharge test (see 9.2);
b) voltage test (see 9.3).
The sequence in which these tests are carried out is at the discretion of the manufacturer.
NOTE Examples
...