HD 632 S3:2016

SLOVENSKI STANDARD
01-oktober-2016
1DGRPHãþD
SIST HD 632 S2:2009
(OHNWURHQHUJHWVNLNDEOL]HNVWUXGLUDQRL]RODFLMRLQQMLKRYSULERU]DQD]QDþHQH
QDSHWRVWLQDGN98P N9GRN98P N9
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 S3:2016
ICS:
29.060.20 Kabli Cables
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

HARMONIZATION DOCUMENT HD 632 S3

DOCUMENT D'HARMONISATION
HARMONISIERUNGSDOKUMENT
August 2016
ICS 29.060.20 Supersedes HD 632 S2:2008
English Version
Power cables with extruded insulation and their accessories for
rated voltages above 36 kV (Um = 42 kV)
up to 150 kV (Um = 170 kV)
Câbles d'énergie à isolation extrudée et leurs accessoires Starkstromkabel mit extrudierter Isolierung und ihre
pour des tensions assignées supérieures à 36 kV Garnituren für Nennspannungen über 36 kV (Um = 42 kV)
(Um = 42 kV) et jusqu'à 150 kV (Um = 170 kV) bis 150 kV (Um = 170 kV)
This Harmonization Document was approved by CENELEC on 2016-06-27. 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 CEN-
CENELEC Management Centre 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, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. HD 632 S3:2016 E
Page 0-1
PART 0
CONTENTS
EUROPEAN FOREWORD
PART 1 General test 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, aluminium-laminated sheath and
metallic sheath and their accessories
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)
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, aluminium-laminated sheath and
metallic sheath and their accessories
4-N Cables with XLPE insulation, copper
screen and metal-laminated sheath and
their accessories (Test list 4N)
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

Page 0-2
PART 0
and their accessories (Test list 4P)

PART 5 Test requirements for cables with XLPE
insulation and metallic sheath and
their accessories
5-C Cables with XLPE insulation, 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-H Cables with XLPE insulation and metallic
sheath and their accessories
5-K Cables with XLPE insulation, and lead
sheath or smooth aluminium 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, copper
screen, aluminium-laminated sheath and
metallic sheath and their accessories
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)
6-J Cables with HEPR insulation and copper
screen and their accessories (Test list 6J)

PART 7 Test requirements for cables with EPR
insulation, metallic screen and
metal-laminated sheath and their accessories

Void
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)

Page 0-3
PART 0
PART 9 Test requirements for cables with PE or
HDPE insulation and metallic screen
and their accessories
Void
PART 10 Test requirements for cables with PE or
HDPE insulation, metallic screen and
metal-laminated sheath and their accessories

Void
PART 11 Test requirements for cables with PE or
HDPE insulation and metallic sheath and
their accessories
Void
__________
Page 0-4
PART 0
European foreword
This document (HD 632 S3:2016) has been prepared by CLC/TC 20 "Electric cables".

The following dates are fixed:

(doa) 2016-12-27
• latest date by which the existence of
this document has to be announced
at national level
(dop) 2017-06-27
• latest date by which this document has to be
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) 2019-06-27
conflicting with this document have to
be withdrawn
This document supersedes HD 632 S2:2008.

Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

The major technical change with respect to HD 632 S2:2008 is the unmodified adoption of the current
edition of IEC 60840 (ed.4, 2011-11) as Part 1 of this European Standard. The test sections in Part 2
have been revised and updated in accordance to the changes to Part 1 and to the sections of Part 3 to
Part 11. The sections in Part 3 to Part 11 have been updated and adapted to the new Part 1 content.
Generally, all references to EN 60811 have been updated to the new EN 60811 series (2012-06).

By decision of the Technical Board (D81/139 extended by D104/118 & D114/076), this HD exists only in
English.
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.

Page 0-5
PART 0
– Blank Page –
Page 1-1
Part 1
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
PART 1: GENERAL TEST REQUIREMENTS

Page 1-2
Part 1
CONTENTS
1 Scope . 6
2 Normative references. 6
3 Terms and definitions . 7
3.1 Definitions of dimensional values (thicknesses, cross-sections, etc.) . 7
3.2 Definitions concerning tests . 7
3.3 Other definitions . 8
4 Voltage designations and materials . 8
4.1 Rated voltages . 8
4.2 Cable insulating materials . 8
4.3 Cable metal screens/sheaths . 8
4.4 Cable oversheathing materials . 9
5 Precautions against water penetration in cables . 9
6 Cable characteristics . 9
7 Accessory characteristics. 10
8 Test conditions . 11
8.1 Ambient temperature . 11
8.2 Frequency and waveform of power frequency test voltages . 11
8.3 Waveform of lightning impulse test voltages . 11
8.4 Relationship of test voltages to rated voltages . 11
8.5 Determination of the cable conductor temperature . 11
9 Routine tests on cables and on the main insulation of prefabricated accessories . 11
9.1 General . 11
9.2 Partial discharge test . 12
9.3 Voltage test . 12
9.4 Electrical test on oversheath of the cable . 12
10 Sample tests on cables . 12
10.1 General . 12
10.2 Frequency of tests . 13
10.3 Repetition of tests . 13
10.4 Conductor examination . 13
10.5 Measurement of electrical resistance of conductor and metal screen . 13
10.6 Measurement of thickness of cable insulation and oversheath . 14
10.6.1 General . 14
10.6.2 Requirements for the insulation . 14
10.6.3 Requirements for the cable oversheath . 14
10.7 Measurement of thickness of metal sheath. 14
10.7.1 Lead or lead alloy sheath . 14
10.7.2 Plain or corrugated aluminium sheath . 15
10.8 Measurement of diameters . 15
10.9 Hot set test for XLPE, EPR and HEPR insulations . 16
10.9.1 Procedure . 16
10.9.2 Requirements . 16
10.10 Measurement of capacitance . 16
10.11 Measurement of density of HDPE insulation . 16

Page 1-3
Part 1
10.11.1 Procedure . 16
10.11.2 Requirements . 16
10.12 Lightning impulse voltage test . 16
10.13 Water penetration test . 17
10.14 Tests on components of cables with a longitudinally applied metal tape or foil,
bonded to the oversheath . 17
11 Sample tests on accessories . 17
11.1 Tests on components . 17
11.2 Tests on complete accessory . 17
12 Type tests on cable systems . 18
12.1 General . 18
12.2 Range of type approval . 18
12.3 Summary of type tests . 19
12.4 Electrical type tests on complete cable systems . 19
12.4.1 Test voltage values . 19
12.4.2 Tests and sequence of tests . 20
12.4.3 Bending test . 20
12.4.4 Partial discharge tests . 21
12.4.5 Tan δ measurement . 21
12.4.6 Heating cycle voltage test . 21
12.4.7 Lightning impulse voltage test followed by a power frequency voltage
test . 22
12.4.8 Examination . 22
12.4.9 Resistivity of semi-conducting screens . 23
12.5 Non-electrical type tests on cable components and on complete cable . 23
12.5.1 Check of cable construction . 24
12.5.2 Tests for determining the mechanical properties of insulation before
and after ageing . 24
12.5.3 Tests for determining the mechanical properties of oversheaths
before and after ageing . 24
12.5.4 Ageing tests on pieces of complete cable to check compatibility of
materials . 25
12.5.5 Loss of mass test on PVC oversheaths of type ST . 25
12.5.6 Pressure test at high temperature on oversheaths . 25
12.5.7 Test on PVC oversheaths (ST ST ) at low temperature . 26
1, 2
12.5.8 Heat shock test for PVC oversheaths (ST and ST ) . 26
1 2
12.5.9 Ozone resistance test for EPR and HEPR insulations . 26
12.5.10 Hot set test for EPR, HEPR and XLPE insulations . 26
12.5.11 Measurement of density of HDPE insulation . 26
12.5.12 Measurement of carbon black content of black PE oversheaths (ST
and ST ) . 26
12.5.13 Test under fire conditions . 27
12.5.14 Water penetration test . 27
12.5.15 Tests on components of cables with a longitudinally applied metal
tape or foil, bonded to the oversheath . 27
12.5.16 Shrinkage test for PE, HDPE and XLPE insulations . 27
12.5.17 Shrinkage test for PE oversheaths (ST and ST ) . 27
3 7
12.5.18 Determination of hardness of HEPR insulation . 27
12.5.19 Determination of the elastic modulus of HEPR insulation . 28

Page 1-4
Part 1
13 Prequalification test of the cable system. 28
13.1 General and range of prequalification test approval . 28
13.2 Prequalification test on complete system . 29
13.2.1 Summary of prequalification tests . 29
13.2.2 Test voltage values . 29
13.2.3 Test arrangement . 29
13.2.4 Heating cycle voltage test . 30
13.2.5 Lightning impulse voltage test . 31
13.2.6 Examination . 31
13.3 Tests for the extension of the prequalification of a cable system. 31
13.3.1 Summary of the extension of prequalification test . 31
13.3.2 Electrical part of the extension of prequalification tests on complete
cable system. 31
14 Type tests on cables . 33
14.1 General . 33
14.2 Range of type approval . 34
14.3 Summary of type tests . 34
14.4 Electrical type tests on completed cables . 34
15 Type tests on accessories . 35
15.1 General . 35
15.2 Range of type approval . 35
15.3 Summary of type tests . 36
15.4 Electrical type tests on accessories . 36
15.4.1 Test voltage values . 36
15.4.2 Tests and sequence of tests . 36
16 Electrical tests after installation . 37
16.1 General . 37
16.2 DC voltage test of the oversheath . 37
16.3 AC voltage test of the insulation . 37
Annex A (informative) Determination of the cable conductor temperature . 45
Annex B (normative) Rounding of numbers . 50
Annex C (informative) List of type, prequalification and extension of prequalification
tests for cable systems, cables and accessories . 51
Annex D (normative) Method of measuring resistivity of semi-conducting screens . 54
Annex E (normative) Water penetration test . 57
Annex F (normative) Tests on components of cables with a longitudinally applied metal
tape or foil, bonded to the oversheath . 59
Annex G (normative) Tests of outer protection for joints . 62
Annex H (normative) Determination of hardness of HEPR insulations . 65
Bibliography . 67

Page 1-5
Part 1
Figure 1 – Example of the test arrangement for the prequalification test. 30
Figure 2 – Example of extension of prequalification test arrangement for the
prequalification of a system with another joint, designed for rigid and flexible installation . 32
Figure A.1 – Typical test set-up for the reference loop and the main test loop . 46
Figure A.2 – Example of an arrangement of the temperature sensors on the conductor
of the reference loop . 47
Figure D.1 – Preparation of samples for measurement of resistivity ofconductor and
insulation screens . 56
Figure E.1 – Schematic diagram of apparatus for water penetration test . 58
Figure F.1 – Adhesion of metal foil . 59
Figure F.2 – Example of overlapped metal foil . 60
Figure F.3 – Peel strength of overlapped metal foil . 60
Figure H.1 – Test on surfaces of large radius of curvature . 66
Figure H.2 – Test on surfaces of small radius of curvature . 66

Table 1 – Insulating compounds for cables . 38
Table 2 – Oversheathing compounds for cables . 38
Table 3 – Tan δ requirements for insulating compounds for cables . 38
Table 4 – Test voltages . 39
Table 5 – Non-electrical type tests for insulating and oversheathing compounds for
cables . 40
Table 6 – Test requirements for mechanical characteristics of insulating compounds for
cables (before and after ageing) . 41
Table 7 – Test requirements mechanical characteristics of oversheathing compounds
for cables (before and after ageing) . 42
Table 8 – Test requirements for particular characteristics of insulating compounds for
cables . 43
Table 9 – Test requirements for particular characteristics of PVC oversheathing for
cables . 44
Table C.1 – Type tests on cable systems, on cables and on accessories . 52
Table C.2 – Prequalification tests on cable systems with a calculated nominal
conductor electric stress above 8,0 kV/mm or a calculated nominal insulation electric
stress above 4,0 kV/mm . 52
Table C.3 – Extension of prequalification tests on cable systems with a calculated
nominal conductor electric stress above 8,0 kV/mm or a calculated nominal insulation
electric stress above 4,0 kV/mm . 53
Table G.1 – Impulse voltage tests . 63

Page 1-6
Part 1
1 Scope
This Part 1 of HD 632 specifies test methods and requirements for power cable systems,
cables alone and accessories alone, for fixed installations and for rated voltages above 36 kV
(U = 42 kV) up to and including 150 kV (U = 170 kV).
m m
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 to individually screened three-core cables
and to their accessories for usual conditions of installation and operation, but not to special
cables and their accessories, such as submarine cables, for which modifications 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 documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. 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 60229:2008, Electric cables – Tests on extruded oversheaths with a special protective
function (IEC 60229:2007)
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 (all parts), Electric and optical fibre cables – Test methods for non-metallic materials
(IEC 60811, all parts)
EN 60885-3, Electrical test methods for electric cables – Part 3: Test methods for partial
discharge measurements on lengths of extruded power cables (IEC 60885-3)
HD 588.1, High voltage test techniques – Part 1: General definitions and test requirements
(IEC 60060-1)
IEC 60183, Guidance for the selection of high-voltage A.C. cable systems

Page 1-7
Part 1
IEC 60287-1-1:2006, Electric cables – Calculation of the current rating – Part 1-1: Current
rating equations (100 % load factor) and calculation of losses – General
ISO 48, Rubber, vulcanized or thermoplastic – Determination of hardness (hardness between
10 IRHD and 100 IRHD)
3 Terms and definitions
For the purposes of this document, the following terms and 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 1 to entry: 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 tests
3.2.1
routine test
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 test
tests made by the manufacturer on samples of completed cable or components taken from a
completed cable or accessory, at a specified frequency as to verify that the finished product
meets the specified requirements
3.2.3
type test
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
Note 1 to entry: Once successfully completed, these tests need not be repeated, unless changes are made in the
cable or accessory with respect to materials, manufacturing process, design or design electrical stress levels, which
might adversely change the performance characteristics.
3.2.4
prequalification test
test made before supplying on a general commercial basis a type of cable system covered by
this standard, in order to demonstrate satisfactory long term performance of the complete
cable system
Page 1-8
Part 1
3.2.5
extension of prequalification test
tests made before supplying on a general commercial basis a type of cable system covered by
this standard, in order to demonstrate satisfactory long term performance of the complete
cable system, taking into account an already prequalified cable system
3.2.6
electrical test after installation
tests made to demonstrate the integrity of the cable system as installed
3.3 Other definitions
3.3.1
cable system
cable with installed accessories including components used for thermo-mechanical restraint of
systems limited to those used for terminations and joints only
3.3.2
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 metal screens/sheaths
This standard applies to the various designs in use. It covers designs providing a radial
watertightness and other designs.
Designs that provide radial watertightness mainly consist of
• metal sheaths,
• longitudinally applied metal tapes or foils bonded to the oversheath,
• composite screens, involving a bunch of wires and, in addition, either a metal sheath or a
metal tape or foil bonded to the oversheath, acting as a radial water impermeable barrier
(see Clause 5),
and other designs such as
• metal tapes or foils not bonded to the oversheath,
• bunch of metal wires only.
In all cases the metal screen/sheath should be able to carry the total fault current.

Page 1-9
Part 1
4.4 Cable oversheathing materials
Tests are specified for four types of oversheath, as follows:
– ST and ST based on polyvinyl chloride (PVC);
1 2
– ST and ST based on polyethylene (PE).
3 7
The choice of the type of oversheath depends on the design of the cable and the mechanical,
thermal and fire 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.
NOTE For some applications the oversheath can be covered by a functional layer (e.g. semi-conductive).
5 Precautions against water penetration in cables
When cable systems are installed in ground, in easily flooded galleries or in water, a radial
water impermeable barrier around the cable is recommended.
NOTE A test for radial water penetration is currently not available.
Longitudinal water barriers may also be applied in order 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 12.5.14.
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;
conductor construction; presence, if any, and nature of measures taken to reduce skin
effect; presence, if any, and nature of measures taken to achieve longitudinal
watertightness; if the nominal cross-sectional area is not in accordance with EN 60228, the
d.c. conductor resistance, corrected to 1 km length and to 20 °C.
d) Material and nominal thickness of insulation (t ) (see 4.2). If the insulation is XLPE,
n
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 metal screen, e.g. number and diameter of wires. (The d.c.
resistance of the metal screen shall be declared.) Material, construction and nominal
thickness of metal sheath, or longitudinally applied metal tape or foil bonded to the
oversheath, 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) Nominal inner diameter (d ) and calculated nominal outer diameter (D ) of the insulation.
ii io
Page 1-10
Part 1
l) Nominal capacitance, corrected to 1 km length, between conductor and metal
screen/sheath.
m) Calculated nominal electrical stress at conductor screen (E ) and at insulation screen (E ):
i o
2U
E =
i
d ×ln(D / d )
ii io ii
2U
E =
o
D ×ln(D / d )
io io ii
where
D = d + 2t ;
io ii n
D is the calculated nominal outer diameter of the insulation;
io
d is the declared nominal inner diameter of the insulation;
ii
t is the declared nominal insulation thickness.
n
The value of U is given in Table 4.
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, if applicable;
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 1-11
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
IEC 60060-1.
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.

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Part 1
The main insulation of each prefabricated accessory shall undergo partial discharge (see 9.2)
and voltage routine tests (see 9.3) according to either 1), 2) or 3) below:
1) on accessories installed on cable;
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 so as 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 vol
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