SIST EN IEC 61442:2025
(Main)Test methods for accessories for power cables with rated voltages from 6 kV (Um = 7,2 kV) up to 30 kV (Um = 36 kV) (IEC 61442:2023)
Test methods for accessories for power cables with rated voltages from 6 kV (Um = 7,2 kV) up to 30 kV (Um = 36 kV) (IEC 61442:2023)
IEC 61442:2023 is available as IEC 61442:2023 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 61442:2023 specifies the test methods applicable for type testing accessories for power cables with rated voltages from 3,6/6 (7,2) kV up to 18/30 (36) kV. The test methods specified in this document apply to accessories for extruded and paper insulated cables according to IEC 60502-2 and IEC 60055-1 respectively.
Prüfverfahren für Starkstromkabelgarnituren mit einer Nennspannung von 6 kV (Um = 7,2 kV) bis 30 kV (Um = 36 kV) (IEC 61442:2023)
Méthodes d'essais des accessoires de câbles d'énergie de tensions assignées de 6 kV (Um = 7,2 kV) à 30 kV (Um = 36 kV) (IEC 61442:2023)
IEC 61442:2023 est disponible sous forme de IEC 61442:2023 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.
L'IEC 61442:2023 définit les méthodes d’essais applicables aux essais de type des accessoires de câbles d’énergie de tensions assignées de 3,6/6 (7,2) kV à 18/30 (36) kV inclus. Les méthodes d’essais spécifiées dans le présent document s’appliquent aux accessoires pour câbles à isolant extrudé et pour câbles isolés au papier imprégné, conformément à l’IEC 60502- 2 et l’IEC 60055-1, respectivement.
Preskusne metode za pribor energetskih kablov za naznačene napetosti od 6 kV (Um = 7,2 kV) do 30 kV (Um = 36 kV) (IEC 61442:2023)
Ta dokument določa preskusne metode, ki se uporabljajo za pribor za tipsko preskušanje energetskih kablov za naznačene napetosti od 3,6/6 (7,2) kV do 18/30 (36) kV. Preskusne metode v tem dokumentu se uporabljajo za pribor za kable z ekstrudirano izolacijo in papirnato izolirane kable v skladu s standardom IEC 60502-2 oziroma IEC 60055-1.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-marec-2025
Preskusne metode za pribor energetskih kablov za naznačene napetosti od 6 kV
(Um = 7,2 kV) do 30 kV (Um = 36 kV) (IEC 61442:2023)
Test methods for accessories for power cables with rated voltages from 6 kV (Um = 7,2
kV) up to 30 kV (Um = 36 kV) (IEC 61442:2023)
Prüfverfahren für Starkstromkabelgarnituren mit einer Nennspannung von 6 kV (Um =
7,2 kV) bis 30 kV (Um = 36 kV) (IEC 61442:2023)
Méthodes d'essais des accessoires de câbles d'énergie de tensions assignées de 6 kV
(Um = 7,2 kV) à 30 kV (Um = 36 kV) (IEC 61442:2023)
Ta slovenski standard je istoveten z: EN IEC 61442:2024
ICS:
19.080 Električno in elektronsko Electrical and electronic
preskušanje testing
29.060.20 Kabli Cables
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN IEC 61442
NORME EUROPÉENNE
EUROPÄISCHE NORM December 2024
ICS 19.080; 29.060.20 Supersedes EN 61442:2005
English Version
Test methods for accessories for power cables with rated
voltages from 6 kV (Um = 7,2 kV) up to 36 kV (Um = 42 kV)
(IEC 61442:2023)
Méthodes d'essais des accessoires de câbles d'énergie de Prüfverfahren für Starkstromkabelgarnituren mit einer
tensions assignées de 6 kV (Um = 7,2 kV) à 36 kV (Um = Nennspannung von 6 kV (Um = 7,2 kV) bis 30 kV (Um = 36
42 kV) kV)
(IEC 61442:2023) (IEC 61442:2023)
This European Standard was approved by CENELEC on 2024-12-09. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61442:2024 E
European foreword
The text of document 20/2108/FDIS, future edition 3 of IEC 61442, prepared by TC 20 "Electric
cables" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2025-12-31
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2027-12-31
document have to be withdrawn
This document supersedes EN 61442:2005 and all of its amendments and corrigenda (if any).
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.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 61442:2023 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
IEC 60228 NOTE Approved as EN IEC 60228
IEC 60507:2013 NOTE Approved as EN 60507:2014 (not modified)
IEC 62475:2010 NOTE Approved as EN 62475:2010 (not modified)
IEC 61442 ®
Edition 3.0 2023-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Test methods for accessories for power cables with rated voltages from 6 kV
(U = 7,2 kV) up to 30 kV (U = 36 kV)
m m
Méthodes d'essais des accessoires de câbles d'énergie de tensions assignées
de 6 kV (U = 7,2 kV) à 30 kV (U = 36 kV)
m m
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 19.080, 29.060.20 ISBN 978-2-8322-7637-2
– 2 – IEC 61442:2023 © IEC 2023
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Test installations and conditions . 8
5 AC voltage tests . 9
5.1 Dry test for all accessories . 9
5.1.1 Installation . 9
5.1.2 Method . 9
5.2 Wet test for outdoor terminations . 9
5.2.1 Installation . 9
5.2.2 Method . 9
5.3 Test in water for stop ends . 9
5.3.1 Installation . 9
5.3.2 Method . 9
6 DC voltage tests . 9
6.1 Installation . 9
6.2 Method . 9
7 Impulse voltage tests . 10
7.1 Installation . 10
7.2 Method . 10
7.3 Test at elevated temperature . 10
8 Partial discharge test . 10
8.1 General . 10
8.2 Method . 10
8.3 Test at elevated temperature . 10
9 Tests at elevated temperature . 11
9.1 Installation and connection . 11
9.2 Measurement of temperature . 11
9.2.1 Cable conductor temperature . 11
9.2.2 Thermocouple position. 11
10 Heating cycle voltage test . 15
10.1 Installation and method . 15
10.2 Test in air . 16
10.3 Test in water . 16
10.4 Immersion test for outdoor terminations . 17
10.4.1 Installation . 17
10.4.2 Method . 17
11 Thermal short-circuit test (screen) . 17
11.1 Installation . 17
11.2 Method . 17
12 Thermal short-circuit test (conductor) . 18
12.1 Installation . 18
12.2 Method . 18
13 Dynamic short-circuit test . 19
IEC 61442:2023 © IEC 2023 – 3 –
13.1 General . 19
13.2 Installation . 19
13.3 Method . 19
14 Humidity and salt fog tests. 19
14.1 Apparatus . 19
14.2 Installation . 19
14.3 Method . 20
15 Impact test at ambient temperature . 20
16 Screen resistance measurement . 21
16.1 General . 21
16.2 Installation . 21
16.3 Method . 21
17 Screen leakage current measurement . 22
17.1 General . 22
17.2 Installation . 22
17.3 Method . 22
18 Screen fault current initiation test . 23
18.1 General . 23
18.2 Installation . 23
18.3 Method . 24
18.3.1 Solidly earthed system . 24
18.3.2 Unearthed or impedance earthed system . 24
19 Operating force test . 25
19.1 General . 25
19.2 Installation . 25
19.3 Method . 25
20 Operating eye test . 25
20.1 General . 25
20.2 Installation . 25
20.3 Method . 25
21 Capacitive test point performance . 25
21.1 General . 25
21.2 Installation . 25
21.3 Test method . 26
Annex A (informative) Determination of the cable conductor temperature . 27
A.1 Purpose . 27
A.2 Calibration of the test cable conductor temperature . 27
A.2.1 General . 27
A.2.2 Installation of cable and thermocouples . 27
A.2.3 Method . 28
A.3 Heating for accessory test. 29
A.3.1 General . 29
A.3.2 Method 1: Test based on measurement of ambient temperature . 29
A.3.3 Method 2: Test based on measurement of the external surface
temperature . 30
A.3.4 Method 3: Test using a control cable . 31
Annex B (informative) Details of the test chamber and spray equipment for humidity
and salt fog tests . 32
– 4 – IEC 61442:2023 © IEC 2023
B.1 Test chamber . 32
B.2 Spray equipment for humidity and salt fog tests . 32
B.3 High voltage transformers . 33
Bibliography . 34
Figure 1 – Terminations tested in air . 11
Figure 2 – Joints tested in air . 12
Figure 3 – Separable connectors tested in air . 12
Figure 4 – Joints tested under water . 13
Figure 5 – Separable connectors tested under water . 14
Figure 6 – Outdoor terminations tested under water . 15
Figure 7 – Heating cycle . 16
Figure 8 – Typical impact test apparatus for joints . 21
Figure 9 – Test arrangement for the screen leakage current measurement . 23
Figure 10 – Test arrangement for screen fault current initiation test . 24
Figure A.1 – Reference cable . 28
Figure A.2 – Arrangement of the thermocouples . 28
Figure A.3 – Current and temperatures curves . 31
IEC 61442:2023 © IEC 2023 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
TEST METHODS FOR ACCESSORIES
FOR POWER CABLES WITH RATED VOLTAGES
FROM 6 kV (U = 7,2 kV) UP TO 30 kV (U = 36 kV)
m m
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
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Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
IEC 61442 has been prepared by IEC technical committee 20: Electric cables. It is an
International Standard.
This third edition cancels and replaces the second edition published in 2005. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) 4.6 – the option to start tests immediately has been included;
b) 4.11 – methods for testing on belted cables have been included;
c) 5.3.2 and 10.3 – details of insulation resistance testing has been added;
d) 8.2 – pre-stress with slightly increased test voltage before applying the partial discharge
test has been included;
e) 11.2 – testing of accessories with external earthing devices has been included;
f) 11.2 – short-circuit duration and maximum kA levels have been added;
– 6 – IEC 61442:2023 © IEC 2023
g) 11.2 – temperature measurement is not required if the time between short-circuits > 1 h.
The text of this International Standard is based on the following documents:
Draft Report on voting
20/2108/FDIS 20/2132/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IEC 61442:2023 © IEC 2023 – 7 –
TEST METHODS FOR ACCESSORIES
FOR POWER CABLES WITH RATED VOLTAGES
FROM 6 kV (U = 7,2 kV) UP TO 30 kV (U = 36 kV)
m m
1 Scope
This document specifies the test methods applicable for type testing accessories for power
cables with rated voltages from 3,6/6 (7,2) kV up to 18/30 (36) kV. The test methods specified
in this document apply to accessories for extruded and paper insulated cables according to
IEC 60502-2 and IEC 60055-1 respectively.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60060-1:2010, High-voltage test techniques – Part 1: General definitions and test
requirements
IEC 60230:2018, Impulse tests on cables and their accessories
IEC 60230:2018/AMD1:2021
IEC 60270:2000, High-voltage test techniques – Partial discharge measurements
IEC 60270:2000/AMD1:2015
IEC 60811-401:2012, Electric and optical fibre cables – Test methods for non-metallic materials
– Part 401: Miscellaneous tests – Thermal ageing methods – Ageing in an air oven
IEC 60811-401:2012/AMD1:2017
IEC 60885-2:1987 , Electrical test methods for electric cables – Part 2: partial discharge tests
IEC 61238-1-3:2018, Compression and mechanical connectors for power cables – Part 1-3:
Test methods and requirements for compression and mechanical connectors for power cables
for rated voltages above 1 kV (U = 1,2 kV) up to 30 kV (U = 36 kV) tested on non-insulated
m m
conductors
IEC 60949:1988, Calculation of thermally permissible short-circuit currents, taking into account
non-adiabatic heating effects
IEC 60949:1988/AMD1:2008
___________
Withdrawn.
– 8 – IEC 61442:2023 © IEC 2023
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminology databases for use in standardization at the following
addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
4 Test installations and conditions
4.1 The test methods described in this document are intended to be used for type tests.
4.2 The test arrangements and the number of test samples are given in the relevant standard.
4.3 The test conditions are specified in Clause 5 to Clause 21. When they are not, they shall
be as specified in the relevant standards.
4.4 The testing parameters and the requirements are given in the relevant standard, unless
otherwise stated.
4.5 For transition joints (either extruded insulation to extruded insulation or extruded
insulation to paper insulation), the testing parameters (voltage and conductor temperature) are
those of the lower rated cable.
4.6 The tests can be started immediately after installation of accessories on the cable test
loops, unless otherwise specified by the manufacturer. The time interval between installation of
the accessories and the start of the tests shall be recorded in the test report.
4.7 Cable screens, and armour if any, shall be bonded and earthed at one end only to prevent
circulating currents.
4.8 All parts of an accessory which are normally earthed shall be connected to the cable
screen. Any supporting metalwork shall also be earthed.
4.9 The ambient temperature shall be (20 ± 15) °C.
4.10 Tap water shall be used for all tests in water.
4.11 Tests on belted cables:
When conducting AC voltage tests and heating cycle voltage tests, a three-phase test voltage
and current system shall be used.
When conducting DC voltage tests and the impulse tests, the test voltage shall be applied to
one cable conductor and the other two cable conductors and the screen shall be earthed. All
cable conductors shall be tested separately.
IEC 61442:2023 © IEC 2023 – 9 –
5 AC voltage tests
5.1 Dry test for all accessories
5.1.1 Installation
The set(s) of accessories shall be erected with all associated metalwork and fittings. The
accessories shall be clean and dry before applying the test voltage.
5.1.2 Method
The test shall be made at ambient temperature, and the procedure for voltage application shall
be as specified in IEC 60060-1:2010, Clause 6, unless otherwise specified.
5.2 Wet test for outdoor terminations
5.2.1 Installation
The terminations shall be erected in a vertical position, unless they are to be specifically
installed in another orientation, with the relative spacing as under service conditions and
according to the manufacturer's instructions.
5.2.2 Method
The wet test method is as described in IEC 60060-1:2010, 4.4, and shall be carried out at
ambient temperature, unless otherwise specified.
5.3 Test in water for stop ends
5.3.1 Installation
The stop ends shall be installed in a water tank of such dimensions as to have a height of water
+01,
of 1,00 m over their top surface, unless otherwise specified. The water shall be at ambient
temperature.
5.3.2 Method
The procedure for voltage application shall be as specified in IEC 60060-1:2010, 6.2, unless
otherwise specified.
After the AC voltage withstand, the insulation resistance shall be measured between the screen
and water. The DC test voltage shall be in the range of 100 V to 1 000 V and shall be applied
for a sufficient time to reach reasonably steady measurement, but in any case, not less than
1 min and not more than 5 min.
6 DC voltage tests
6.1 Installation
The set(s) of accessories shall be erected with all associated metalwork and fittings. The
accessories shall be clean and dry before applying the test voltage.
6.2 Method
A voltage of negative polarity shall be applied to the cable conductor.
The test shall be made at ambient temperature and the procedure for voltage application shall
be as specified in IEC 60060-1:2010, Clause 5.
– 10 – IEC 61442:2023 © IEC 2023
7 Impulse voltage tests
7.1 Installation
For preparation of the test installation, involving metal enclosures and terminal boxes, reference
shall be made to the relevant standard.
The three phases of the three-core accessories can be tested together, unless the spaces
between each phase are specified. In this case (such as three single-core terminations in an
enclosure), each phase of the three-core accessories shall be tested at a time, with the other
two phases earthed.
7.2 Method
The test shall be conducted according to the procedure given in IEC 60230:2018, Clause 5,
Clause 6, Clause 7, Clause 9 and Clause 10 and IEC 60230:2018/AMD1:2021, Clause 10, and
shall be carried out at ambient temperature, unless otherwise specified.
7.3 Test at elevated temperature
The installation and the measurement of temperature are given in Clause 9.
The cable conductor shall be heated and stabilized for at least 2 h at a temperature of
– 5 K to 10 K above the maximum cable conductor temperature in normal operation for
extruded insulation cables,
– 0 K to 5 K above the maximum cable conductor temperature in normal operation for paper
insulated cables,
before and during the impulse test.
8 Partial discharge test
8.1 General
This test is only required for accessories for extruded insulation single-core cables and three-
core cables with individually semi-conducting screened cores. It is not required for accessories
incorporating paper insulated cables.
8.2 Method
The test shall be conducted in accordance with IEC 60270:2000 and
IEC 60270:2000/AMD1:2015 and IEC 60885‑2:1987 and shall be carried out at ambient
temperature, unless otherwise specified.
The partial discharge shall be measured at the test voltage given in the relevant standard after
maintaining the test object for 1 min at a pre-stressing voltage equal to the specified test voltage
increased by 0,25 U .
8.3 Test at elevated temperature
The installation and the measurement of temperature are given in Clause 9.
___________
Withdrawn.
IEC 61442:2023 © IEC 2023 – 11 –
The cable conductor shall be heated and stabilized for at least 2 h at a temperature of 5 K to
10 K above the maximum cable conductor temperature in normal operation, before and during
the partial discharge test.
9 Tests at elevated temperature
9.1 Installation and connection
The accessories shall be erected, supported where necessary and provided with connections
to permit heating current to be circulated.
Where terminations or separable connectors are to be tested, the connection between either
lugs or bushings shall have an electrical cross-section equivalent to that of the cable conductor.
Where branch joints are to be tested, only the main cable shall carry the heating current.
Three-core accessories can be connected for either single-phase or three-phase heating
current. When heated with single-phase current a single-phase voltage shall be superimposed
on the heating current. Respectively when heated with three-phase current a three-phase
voltage shall be superimposed on the heating current. In the case of a magnetic covering, a
three-phase heating current shall be applied.
Accessories for belted cables shall be subjected to three-phase voltage.
9.2 Measurement of temperature
9.2.1 Cable conductor temperature
It is recommended that one of the methods described in Annex A is used to determine the actual
conductor temperature.
9.2.2 Thermocouple position
If method 2 of Annex A is used to determine the conductor temperature, two thermocouples
shall be attached to the cable sheath as shown in Figure 1 to Figure 6.
Dimensions in metres
All distances mentioned to position thermocouples are minimum values.
Figure 1 – Terminations tested in air
– 12 – IEC 61442:2023 © IEC 2023
Dimensions in metres
All distances mentioned to position thermocouples are minimum values.
Figure 2 – Joints tested in air
Dimensions in metres
All distances mentioned to position thermocouples are minimum values.
Figure 3 – Separable connectors tested in air
IEC 61442:2023 © IEC 2023 – 13 –
Dimensions in metres
All distances mentioned to position thermocouples are minimum values.
NOTE The height of the water is as indicated, unless otherwise specified.
Figure 4 – Joints tested under water
– 14 – IEC 61442:2023 © IEC 2023
Dimensions in metres
All distances mentioned to position thermocouples are minimum values.
NOTE The height of the water is as indicated, unless otherwise specified.
Figure 5 – Separable connectors tested under water
IEC 61442:2023 © IEC 2023 – 15 –
Dimensions in metres
All distances mentioned to position thermocouples are minimum values.
Figure 6 – Outdoor terminations tested under water
10 Heating cycle voltage test
10.1 Installation and method
The arrangement for tests in air or water shall be as given in Clause 9.
The measurement of temperature is also given in Clause 9.
Each heating cycle in air or water shall be of at least 8 h duration with at least 2 h at a steady
temperature:
– 5 K to 10 K above the maximum cable conductor temperature in normal operation for cables
with extruded insulation;
– 0 K to 5 K above the maximum cable conductor temperature in normal operation for paper
insulated cables,
followed by at least 3 h of natural cooling to within 10 K of ambient temperature (see Figure 7).
– 16 – IEC 61442:2023 © IEC 2023
Figure 7 – Heating cycle
10.2 Test in air
The test assembly shall be subjected to the required number of heating cycles, energized at
the voltage given in the relevant standard.
10.3 Test in water
For heat cycling in water, joints or separable connectors shall be installed in a vessel so as to
+01,
have a height of water 1,00 m above the top surface of all accessories under test, unless
otherwise specified. The water shall be at ambient temperature.
For accessories used with non-longitudinally water-blocked cable designs, the heating cycles
voltage test under water shall be performed with oversheath damage. Expose the core(s) of
one polymeric insulated cable at the entry to the accessory by removing an annulus of the
oversheath, together with any bedding or filling material, of at least 50 mm in length, at a point
which will be within the water and between 50 mm and 150 mm from the exterior of the
accessory.
The exposure of the core(s) shall be made on the side with the shorter length between the
oversheath cut and connectors.
NOTE The oversheath damage requirement does not apply to longitudinally water-blocked cable designs.
The test under water is not required for joints with a continuous metallic covering plumbed or
welded to the cable metallic sheath.
The test assembly shall be subjected to the required number of thermal cycles, energized at
the voltage given in the relevant standard.
After testing, the insulation resistance shall be measured between the conductor and metallic
screen/sheath and the screen to water. The insulation resistance shall be measured between
the screen and water only for cables without oversheath damage. The DC test voltage shall be
in the range of 100 V to 1 000 V and shall be applied for a sufficient time to reach reasonably
steady measurement, but in any case, not less than 1 min and not more than 5 min.
IEC 61442:2023 © IEC 2023 – 17 –
10.4 Immersion test for outdoor terminations
10.4.1 Installation
All the terminations of a the test loop shall be immersed in water at ambient temperature with
+0,02
a height of water 0,03 m above every part of the terminations. The test loop shall be
installed upside down in a water tank at ambient temperature, in such a way that the
terminations are fully immersed in water, including the end of the sealing element (see
Figure 6).
10.4.2 Method
The test loop shall be subjected to 10 cycles under the conditions given in 10.1. The test loop
shall not be energized.
11 Thermal short-circuit test (screen)
11.1 Installation
The test loop shall consist of the cable with its accessories.
The screen connections at both ends of the test loop shall be disconnected from earth and
connected to a short-circuit generator. Accessories equipped with external earthing devices
shall have these connections included in the short-circuit test.
The thermocouples to measure the screen temperature should be installed at minimum 0,5 m
from the termination as shown in Figure 1, Figure 2 and Figure 3.
11.2 Method
The current (I ) and duration (t) for the test shall be agreed between the manufacturer and the
sc
customer, taking into account the actual short-circuit conditions of the network and the cable
design. The duration (t) and current (I ) of the short-circuit shall be (1 ± 0,5) s up to a maximum
sc
current of 25 kA, if not otherwise specified. If the required short-circuit current exceeds this
value a longer duration ≤ 5 s with a current between 25 kA and 45 kA shall be used.
The installation and the measurement of the conductor temperature are given in Clause 9.
The cable conductor shall be heated and stabilized for at least 2 h at a temperature of
– 5 K to 10 K above the maximum cable conductor temperature in normal operation for cables
with extruded insulation;
– 0 K to 5 K above the maximum cable conductor temperature in normal operation for paper
insulated cables,
before carrying out the short-circuit test.
Before and after the short-circuits, the temperature of the screen shall be measured using
thermocouples or any other suitable means. Measurement of the screen temperature is not
necessary, if the time between the two stresses is longer than 1 h while continuing to apply
heating current in the cable conductor.
Two short-circuits, corresponding to the current and time requirements agreed, shall then be
applied to the screen. The achieved Joule integral (I t) shall be within 0 % and +10 % of the
calculated integral value. Between the two short-circuits, the cable screen shall be allowed to
cool to a temperature less than 10 K above its temperature prior to the first short-circuit.
– 18 – IEC 61442:2023 © IEC 2023
If the current is not constant during the short-circuit, it is recommended to determine the RMS
value of the short-circuit current using IEC 61238-1-3:2018, Annex E.
12 Thermal short-circuit test (conductor)
12.1 Installation
The test loop shall consist of the cable with its accessories.
Three-core accessories shall be tested with one end of the cable loop connected to the short-
circuit generator and the other to a short-circuiting bar as described in the relevant standard.
Alternatively, the three cores may be connected in series and tested as single-core accessories.
12.2 Method
The short-circuit method shall follow IEC 61238-1-3:2018, 6.4.1 and 6.4.2 with the following
adjustment:
– The tests shall be carried out on the test loop at ambient temperature.
– Two short-circuits shall be applied using either alternating current or direct current.
Between the two short-circuits, the test loop shall be allowed to cool to a temperature less than
10 K above its temperature prior to the first short-circuit (θ ). An alternative method to avoid
i
having to measure the conductor temperature prior to the second short-circuit is to ensure that
the test sample has cooled for > 3 h. If a cooling duration of > 3 h is applied, the I t of the first
short-circuit applies also for the second short-circuit.
The maximum permissible short-circuit temperature of the cable conductor is given in
IEC 60949:1988 and IEC 60949:1988/AMD1:2008.
The following formulae from IEC 60949:1988 and IEC 60949:1988/AMD1:2008 shall be used:
θ + 228
sc
2 4 2
For aluminium conductors: I t = 2,19 × 10 × S × In
θ + 228
i
θ + 234,5
sc
2 4 2
For copper conductors: I t = 5,11 × 10 × S × In
θ + 234,5
i
where
I is the RMS value of the short-circuit current (A);
t is the duration (s);
S is the conductor cross-sectional area (mm );
θ is the permissible short-circuit conductor temperature (°C);
sc
θ is the conductor temperature at the start of the test (°C);
i
ln is the log .
e
If the current is not constant during the short-circuit, it is recommended to determine the RMS
value of the short-circuit current using IEC 61238-1-3:2018, Annex E.
IEC 61442:2023 © IEC 2023 – 19 –
13 Dynamic short-circuit test
13.1 General
This test is a three-phase test required for single-core cable accessories designed for initial
peak currents higher than 80 kA and for three-core cable accessories
...
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