SIST HD 629.3 S1:2024

SLOVENSKI STANDARD
01-marec-2024
Nadomešča:
SIST HD 629.2 S2:2006
SIST HD 629.2 S2:2006/A1:2009
Preskusne zahteve za pribor, ki se uporablja na elektroenergetskih kablih z
naznačeno napetostjo od 3,6/6(7,2) kV do vključno 20,8/36(42) kV - 3. del:
Prehodne spojke med kabli z impregnirano papirno izolacijo in kabli z ekstrudirano
izolacijo
Test requirements for accessories for use on power cables of rated voltage from 3,6/6
(7,2) kV up to 20,8/36(42) kV - Part 3: Transition joints between cables with impregnated
paper insulation and cables with extruded insulation
Prüfanforderungen für Kabelgarnituren für Starkstromkabel mit einer 12 Nennspannung
von 3,6/6(7,2) kV bis 20,8/36(42) kV 13 Teil 3: Übergangsmuffen für Kabel mit
massegetränkter Papierisolierung 14 und für Kabel mit extrudierter Kunststoffisolierung
Exigences relatives aux essais des accessoires des câbles d'énergie pour des tensions
assignées de 3,6/6(7,2) kV à 20,8/36(42) kV - Partie 3: Jonctions mixtes entre les câbles
isolés au papier imprégné et les câbles à isolation extrudée
Ta slovenski standard je istoveten z: HD 629.3 S1:2024
ICS:
29.035.10 Papirni in kartonski izolacijski Paper and board insulating
materiali materials
29.060.20 Kabli Cables
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

HARMONIZATION DOCUMENT HD 629.3 S1

DOCUMENT D'HARMONISATION
HARMONISIERUNGSDOKUMENT January 2024
ICS 29.035.10; 29.060.20 Supersedes HD 629.2 S2:2006 (PART); HD 629.2
S2:2006/A1:2008 (PART)
English Version
Test requirements for accessories for use on power cables of
rated voltage from 3,6/6(7,2) kV up to 20,8/36(42) kV - Part 3:
Transition joints between cables with impregnated paper
insulation and cables with extruded insulation
Exigences relatives aux essais des accessoires des câbles Prüfanforderungen für Kabelgarnituren für Starkstromkabel
d'énergie pour des tensions assignées de 3,6/6(7,2) kV à mit einer Nennspannung von 3,6/6(7,2) kV bis 20,8/36(42)
20,8/36(42) kV - Partie 3: Jonctions mixtes entre les câbles kV - Teil 3: Übergangsmuffen für Kabel mit
isolés au papier imprégné et les câbles à isolation extrudée massegetränkter Papierisolierung und für Kabel mit
extrudierter Kunststoffisolierung
This Harmonization Document was approved by CENELEC on 2023-12-11. 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, 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. HD 629.3 S1:2024 E
Contents Page
European foreword . 4
Introduction . 5
1.1 General . 6
1.2 Type of accessories . 6
1.3 Rated voltage . 6
5.1 Connectors . 9
5.2 Materials . 9
6.1 Identification . 9
6.1.1 Cables . 9
6.1.2 Connectors . 9
6.1.3 Accessories . 9
6.2 Cable conductor nominal cross section . 10
6.2.1 Paper cable . 10
6.2.2 Polymeric cable . 10
6.2.3 Qualification . 10
6.3 Assembly . 11
6.4 Transition joints . 11
6.5 Test arrangements and number of samples . 11
7.1 General . 12
7.2 Connectors . 12
7.3 Cable constructions . 13
7.4 Extension of compliance to paper to paper cable joints. 14
7.5 Extension of compliance from EPR or HEPR to XLPE/paper transition joints. 14
8.1 General . 14
8.2 Dynamic short circuit performance . 14
9.1 General . 15
9.2 Test reports . 15
9.3 Failures . 15
9.3.1 General . 15
9.3.2 Installation or procedure errors . 15
9.3.3 Cable failure . 16
Annex A (normative) Identification . 22
A.1 Identification of test cable (paper insulated) (see 6.1.1 and 9.2) . 22
A.2 Identification of test cable (extruded insulation) (see 6.1.1 and 9.2) . 23
Annex B (normative) Identification of connector (see 6.1.2 and 9.2) . 24
Annex C (normative) Visual examination . 25
C.1 Method . 25
C.2 Examination sheet . 26
C.3 Special requirements for transition joints submitted to test sequence B3R . 26
Annex D (informative) Test for quality check of insulation of paper insulated cable . 27
D.1 Oil bath test . 27
Annex E (normative) Test sequences B3W (Withstand) and B3R (Robustness) . 28
E.1 General . 28
E.2 Purpose . 28
E.3 General test conditions . 28
E.3.1 Test set-up . 28
E.3.2 Mounting of the transition joints . 28
E.4 AC voltage test . 29
E.5 Combined water and conductor cycling test . 29
E.5.1 General . 29
E.5.2 Principle . 29
E.5.3 Water heating cycles . 29
E.5.4 Conductor heating cycles . 29
E.5.5 Recordings . 30
E.6 Electrical heat cycling test in air . 30
E.7 AC breakdown test on set 1 and set 2 samples (for B3R category only) . 30
E.8 AC voltage test (for B3W category only) . 31
E.9 Visual examination . 31
Annex F (informative) Commonly used types of paper insulated cable designs. 32
Bibliography . 33
Tables
Table 1 — Selection of nominal cross sections of extruded insulated cable vs paper insulated cable
conductor nominal cross sections . 10
Table 2 — Compliance and qualification scheme for transition joints . 11
Table 3 — Compliance requirements of connectors for joints. 13
Table 4 — Extension of compliance from tested paper cable to other types of paper cable . 13
Table 5 — Compliance from tested extruded cable insulation to other extruded cable insulation . 14
Table 6 — Transition joints between cables with impregnated paper insulation and cables with extruded
insulation (see Table 9) . 17
Table 7 — Additional tests for compliance extension to other conductor connectors . 19
Table 8 — Summary of test voltages (refer to Clause 7) . 20
Table 9 — Test arrangements for transition joints . 21
Figures
Figure E.1 — general diagram of the testing set-up . 28
Figure E.2 — heating cycles (principle) . 30

European foreword
This document (HD 629.3 S1:2024) has been prepared by the CLC/TC 20 “Electric cables”.
The following dates are fixed:
• latest date by which this document has to be (dop) 2024-12-11
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) 2026-12-11
conflicting with this document have to be
withdrawn
This document partially supersedes HD 629.2 S2:2006 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.
Introduction
This document defines requirements and tests which can be called up for transition joints, when used between
extruded insulated power cables and impregnated paper insulated power cables covered by HD 620 and
HD 621 or another relevant standard.
1 Scope
1.1 General
This document specifies performance requirements for type tests for transition joints for use between extruded
insulated power cables as specified in HD 620 and impregnated paper insulated power cables as specified in
HD 621 or another relevant standard.
Once type test for an accessory is successfully completed, it is not necessary to repeat the test, unless
changes are made in the materials, design or manufacturing process, which might affect the performance
characteristics.
Possible extra thermo-mechanical forces due to high current loads from renewable sources of power
generation are not covered by these tests (under consideration).
Accessories for special applications such as submarine cables, ships cables or hazardous situations (explosive
environments, fire resistant cables or seismic conditions) are not included.
Test methods are included in EN IEC 61442:— and Annex E.
NOTE 1 This document does not invalidate existing approvals of products achieved on the basis of national standards
and specifications and/or the demonstration of satisfactory service performance. However, products approved according
to such national standards or specifications cannot directly claim approval to this document.
NOTE 2 It might be possible, subject to agreement between supplier and purchaser, and/or the relevant conformity
assessment body, to demonstrate that conformity to the earlier standard can be used to claim conformity to this document,
provided an assessment is made of any additional type testing that might need to be carried out. Any such additional
testing that is part of a sequence of testing cannot be done separately.
1.2 Type of accessories
The accessories covered by this document are straight and branch transition joints of all designs, suitable for
use underground or in air.
1.3 Rated voltage
The rated voltages U0/U (Um) of the accessories covered by this document are 3,6/6(7,2) - 3,8/6,6(7,2) -
6/10(12) - 6,35/11(12) - 8,7/15(17,5) - 12/20(24) - 12,7/22(24) - 18/30(36) - 19/33(36) - 20,8/36(42) kV.
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.
EN IEC 61238-1-3, 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 (Um
= 1,2 kV) up to 36 kV (Um = 42 kV) tested on non-insulated conductors Um = 1,2 kV) up to 36 kV (Um = 42 kV)
tested on non-insulated conductors
EN IEC 61442:— , 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)
HD 620 S2, Distribution cables with extruded insulation for rated voltages from 3,6/6 (7,2) kV up to and
including 20,8/36 (42) kV
———————
To be published. Stage at the time of publication: FprEN IEC 61442:2023.
HD 621 S1, Medium voltage impregnated paper insulated distribution cables
HD 629.1 S3, Test requirements for accessories for use on power cables of rated voltage from 3,6/6(7,2) kV
up to 20,8/36(42) kV - Part 1: Accessories for cables with extruded insulation
IEC 60050-461, International Electrotechnical Vocabulary - Chapter 461: Electric cables
3 Definitions
For the purposes of this document, the terms and definitions given in IEC 60050-461 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
3.1
connector
device for connecting a conductor to an equipment terminal or for connecting two or more conductors to each
other
[SOURCE: EN IEC 61238-1-3]
3.2
joint
accessory suitable for use in air or underground which makes a connection between two or more insulated
power cables to form a continuous circuit
3.3
type I joint
joint suitable for use where an impact resistance withstand is not required
3.4
type II joint
joint which has an impact resistance withstand in accordance with this document
3.5
R category joint
joint which has an AC breakdown minimum performance after extended immersion period in water with
combined water and conductor heating cycling tests
3.6
W category joint
joint which has an AC withstand minimum performance after extended immersion period in water with
combined water and conductor heating cycling tests
3.7
Z category joint
joint not tested with the extended immersion period in water and combined water and conductor heating cycling
tests
3.8
straight joint
accessory making a connection between two cables to form a continuous circuit
Note 1 to entry: For types of joint see 3.3 and 3.4.
[SOURCE: IEV 461-11-01]
3.9
branch joint
accessory making a connection of a branch cable to a main cable
Note 1 to entry: For types of joint see 3.3 and 3.4.
[SOURCE: IEV 461-11-17]
3.10
transition joint
straight or branch joint making a connection between paper insulated cable and extruded cable
[SOURCE: IEV 461-11-04 modified]
3.11
trifurcating transition joint
straight or branch joint making a connection between 3 core paper insulated cable and 3 separate single core
extruded cables
3.12
radial field joint
joint where the individual cores are screened throughout the joint
3.13
non-radial field joint
joint which does not contain individual core screens
3.14
shelf life
storage life
duration of the time interval components may be stored under specified conditions without changing any
important properties
[SOURCE: IEV 212-13-15, modified]
3.15
U
rated power-frequency voltage between conductor and earth or metallic screen, for which the cable accessory
is designed
3.16
U
rated power-frequency voltage between conductors for which the cable accessory is designed
3.17
U
m
maximum value of the 'highest system voltage' for which the cable accessory is designed
4 Current
The continuous current rating of a transition joint is in accordance with the operating temperature of the cable
specified in HD 621 or other relevant cable standards and is suitable for operation at the rated current and
under short circuit fault conditions at the temperatures stated therein
5 Components
5.1 Connectors
Connectors used within the accessory shall comply with EN IEC 61238-1-3, or with another relevant standard
or specification when agreed between manufacturer/supplier. All connectors shall be identified in accordance
with Annex B.
Where an accessory is to be installed with a different connector than that used for qualification, its compatibility
and performance shall be verified.
Compliance is demonstrated with the connector used in the tests. For extension of compliance to other
connectors refer to 7.2.
5.2 Materials
It is not a prerequisite for compliance with this document that any component material (resin, heat-shrink tubing
etc.) should be subject to any form of individual type testing or fingerprinting.
Where required, monitoring of the ongoing suitability of component material supplies should be done by
fingerprinting using the EN 50655 series.
If type testing of resins, pressure sensitive adhesive tapes and flexible insulating sleevings for electrical
purposes is required, reference should be made to the relevant standards produced by IEC/TC 15, which have
been adopted by CENELEC, as listed for information in the bibliography.
The term “material characterization” is sometimes used in conjunction with both type testing and fingerprinting
of component materials, but it is undefined, and its use should therefore be avoided.
6 Test assemblies
6.1 Identification
6.1.1 Cables
The cables used for testing shall comply with HD 620 S2 and/or HD 621 S1 or other relevant standards as
applicable. Constructional details of the cables shall be identified (refer to A.1 and A.2).
Paper insulated cables used for the tests are sometimes issued from the field. It is recommended to check the
quality of the insulation of the paper insulated cable (according to Annex D for example) prior to proceed to
any test.
6.1.2 Connectors
Connectors used within the accessories shall be identified as in Annex B.
6.1.3 Accessories
The accessory that is installed shall be within its shelf life.
Accessories to be tested shall be correctly identified with respect to
— name of manufacturer/supplier,
— type, designation, manufacturing date or code, end of shelf life date,
— minimum and maximum nominal cross sections, material and shape of cable conductor as used in
EN 60228 for conductors,
— minimum and maximum cable insulation diameters,
— connector type(s),
— rated voltage (see 1.3),
— installation instructions (reference and date),
— list of kit contents.
6.2 Cable conductor nominal cross section
6.2.1 Paper cable
Unless otherwise specified, the nominal cross sections of the paper insulated cable shall be between 120 mm
and 240 mm .
6.2.2 Polymeric cable
The nominal cross sections of extruded insulated cable shall be selected in order not to overheat or cool the
paper cable side (see Table 1).
Table 1 — Selection of nominal cross sections of extruded insulated cable
vs paper insulated cable conductor nominal cross sections
nominal cross sections of nominal cross sections of
paper insulated cable (mm ) extruded insulated cable
(mm )
Al Cu Al Cu
120  120 95
120 185 120
150  150 95
150 240 150
185  185 120
185 300 185
240  240 150
240 400 240
6.2.3 Qualification
2 2
Compliance for the range of cable nominal cross sections from 35 mm to 400 mm , shall be obtained by
successfully completing all the appropriate tests of Table 6 on any one of the paper cable nominal cross
sections specified in 6.2.1.
Table 2 — Compliance and qualification scheme for transition joints
Tests to be performed
Paper cable Range of
nominal nominal
Accessory size
a
cross Category of joints Samples cross
Test sequences
tested
sections sections
selected qualified
Z W R
B1 X X X 4 (1- core)
b
(Type I or II)
2 (3- core)
one of:
X X X 3 (1- core)
B2
120 mm 2
Specific for one
35 mm to
b
(Class 0, 1, 2 or 3)
1 (3- core)
of the conductor
2 400 mm
150 mm
sizes described
X 3 (1- core)
in 6.2.1
185 mm
B3W
b
1 (3- core)
240 mm
X 6 (1- core)
B3R
b
2 (3- core)
a
Test sequences refer to Table 6.
b
Trifurcating transition joints shall be tested as per 3-core joints.
The choice of type, class and category of joint shall be agreed between manufacturer/supplier and purchaser.
6.3 Assembly
Accessories shall be assembled in accordance with the manufacturer/supplier's instructions, using the
components and materials supplied or specified. A joint designed for crossed cores shall be assembled with
the cores crossed.
6.4 Transition joints
Transition joints shall be tested according to Table 2 to withstand a water height of 1 m (equivalent to 10 kPa
relative).
NOTE 1 For special applications and in situations subject to a high-water table or prone to flooding, this height of water
might be insufficient to ensure the satisfactory performance of the moisture seals.
Where a water height of 1 m is deemed insufficient, upon agreement with the manufacturer/supplier,
accessories shall be tested using an increased water height of 20 m (equivalent to 200 kPa relative).
The water height used shall be recorded in the test report.
Testing at one water height demonstrates compliance for that water height only.
Testing at both 1 m and 20 m water heights demonstrates compliance at those water heights and at all
intermediate water heights.
NOTE 2 The equivalent water height can be achieved using a pressurized water tank.
Where a branch joint is being tested, only the main cable shall carry heating current.
6.5 Test arrangements and number of samples
These are detailed in Table 9.
7 Extent of compliance
7.1 General
In general, tests made on one type of cable combination apply to that arrangement only. However, extent of
compliance rules given hereafter shall be applied.
Compliance shall extend to the use of an accessory on extruded cables of the same U0 as the test extruded
cable but with equal or greater nominal insulation thickness. The converse shall not apply.
Compliance of an accessory tested for a specified U0 shall extend to operation of the accessory at a lower U0
provided the radial electrical stress at the insulation screen of the two cables of lower U0 is not greater than
that of the test cables.
Compliance for one type of accessory for the range of paper insulated cable conductor nominal cross sections
2 2
from 35 mm to 400 mm shall be obtained by successfully completing all the appropriate tests of Table 6 on
one of the nominal cross sections specified in 6.2.1. The combination of completing the approval on a cable
as specified in 6.2.1 and a cable with a cross section larger than 400 mm will provide approval between
35 mm and the selected larger cross section. For approval of cross sections above 400mm2 the test sequence
B1 from Table 6 shall be completed.
Unless by agreement between manufacturer and the purchaser, sizes tested outside of the 6.2.1 requirement
alone give compliance to that size only.
Compliance is independent of the cable conductor material; tests may be carried out with either aluminium or
copper conductors taking into account thermal considerations given in 6.2.2.
Compliance shall extend to all lower dynamic short circuit classes than tested.
Compliance shall extend for category R joints to joints of categories W and Z, the converse shall not apply.
Compliance shall extend for category W joints to joints of category Z, the
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