HD 629.2 S2:2006

Test requirements on accessories for use on power cables of rated voltage from 3,6/6(7,2) kV up to 20,8/36(42) kV - Part 2: Cables with impregnated paper insulation

This standard specifies performance requirements for type tests for cable accessories for use on impregnated paper insulated power cables as specified in HD 621. Formerly, approvals of such products have been achieved on the basis of national standards and specifications and/or the demonstration of satisfactory service performance. The publication of this CENELEC standard does not invalidate existing approvals. However, products approved to such earlier standards or specifications shall not claim approval to this CENELEC standard unless specifically tested to it. It is not necessary to repeat these tests, once successfully completed, unless changes are made in the materials, design or manufacturing process, which might affect the performance characteristics. 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 61442.

Prüfanforderungen für Kabelgarnituren für Starkstromkabel mit einer Nennspannung von 3,6/6(7,2) kV bis 20,8/36(42) kV - Teil 2: Kabel mit massegetränkter Papierisolierung

Diese Norm legt die Anforderungen bei Typprüfungen für Kabelgarnituren in Verbindung mit massegetränkten Papierkabeln, wie in HD 621 beschrieben, fest. In der Vergangenheit erfolgte die Zulassung von Garnituren auf der Basis nationaler Normen und Bedingungen und/oder dem Nachweis hinreichender Betriebsergebisse. Durch die Veröffentlichung dieser CENELEC Norm werden bestehende Zulassungen nicht ungültig. Jedoch gelten Gernituren, typgeprüft nach früheren Normen oder Bedingungen, nicht als nach dieser CENELEC-Norm typgeprüft; solange sie nicht diesem entsprechend geprüft wurden. Nachdem diese Prüfung erfolgreich bestanden wurde braucht diese nicht wiederholt werden, es sei denn, Änderungen in Material, Konstruktion oder Herrstellprozess welche die Betriebseigenschaften beeinflussen können, wurden vorgenommen. Diese Norm gilt nicht für Garnituren für spezielle Anwendungsbereiche, z.B. Seekabel, Schiffskabel oder für den Einsatz unter gefährlichen Bedingungen (explosive Umgebung, feuerbeständige Kabel oder Erdbebengefährdung). Die Prüfverfahren sind in EN 61442 enthalten.

Prescriptions relatives aux essais sur les accessoires des câbles d'énergie pour des tensions assignées de 3,6/6(7,2) kV à 20,8/36(42) kV - Partie 2: Câbles isolés au papier imprégné

Le présent Document d’Harmonisation définit les prescriptions fonctionnelles concernant les essais de type sur les accessoires de câbles d'énergie à isolation au papier imprégné spécifiés dans le HD 621. Auparavant, les agréments de ces accessoires ont été réalisés sur la base de normes ou spécifications nationales et/ou sur la base d’une démonstration d’une expérience en service satisfaisante. La publication de cette norme CENELEC n’invalide pas les agréments existants. Cependant, des accessoires agréés sur la base de normes ou spécifications antérieures ne peuvent revendiquer un agrément suivant la présente norme CENELEC tant qu’ils n’ont pas subit les essais de celle-ci. Une fois ces essais effectués, il n'est pas nécessaire de les répéter sauf si des changements intervenant dans les matériaux, la conception ou le procédé de fabrication, sont susceptibles d'affecter les caractéristiques de fonctionnement. Les accessoires pour usages spéciaux tels que les câbles sous-marins, les câbles de bord ou pour situations dangereuses (environnements explosifs, câbles résistant au feu ou aux conditions sismiques) ne sont pas traités par cette norme. Les méthodes d’essais sont décrites dans la EN 61442.

Preskusne zahteve za pribor, ki se uporablja na elektroenergetskih kablih za naznačene napetosti od 3,6/6(7,2) kV do vključno 20,8/36(42) kV – 2. del: Kabli, izolirani z impregniranim papirjem

General Information

• Status: Published
• Publication Date: 23-Feb-2006
• Withdrawal Date: 31-Aug-2008
• ICS: 29.060.20 - Cables
• Technical Committee: CLC/TC 20 - Electric cables
• Drafting Committee: IEC/TC 20 - IEC_TC_20
• Parallel Committee: IEC/TC 20 - IEC_TC_20
• Current Stage: 9092 - Decision on results of review/2YR ENQ - revise - Review Enquiry
• Start Date: 12-Aug-2021
• Completion Date: 23-Sep-2025
• Ref Project: SIST HD 629.2 S2:2006 - Test requirements on accessories for use on power cables of rated voltage from 3,6/6(7,2) kV up to 20,8/36(42) kV -- Part 2: Cables with impregnated paper insulation

Relations

• Replaces: HD 629.2 S1:1997/A1:2001 - Test requirements on accessories for use on power cables of rated voltage from 3,6/6(7,2) kV up to 20,8/36(42) kV - Part 2: Cables with impregnated paper insulation
• Effective Date: 28-Jan-2023
• Replaces: HD 629.2 S1:1997 - Test requirements on accessories for use on power cables of rated voltage from 3,6/6(7,2) kV up to 20,8/36(42) kV - Part 2: Cables with impregnated paper insulation
• Effective Date: 28-Jan-2023
• Split Into: HD 629.2 S3:2024 - 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 2: Cables with impregnated paper insulation
• Effective Date: 30-Aug-2022
• Split Into: HD 629.3 S1:2024 - 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
• Effective Date: 30-Aug-2022
• Amended By: HD 629.2 S2:2006/A1:2008 - Test requirements on accessories for use on power cables of rated voltage from 3,6/6(7,2) kV up to 20,8/36(42) kV - Part 2: Cables with impregnated paper insulation
• Effective Date: 28-Jan-2023

Overview

HD 629.2 S2:2006 (CLC / CENELEC) defines type test performance requirements for cable accessories used on medium-voltage impregnated paper insulated power cables (see HD 621). It covers accessories for rated voltages from 3,6/6(7,2) kV up to 20,8/36(42) kV and specifies how accessories such as terminations, joints, separable connectors and stop ends must be tested. Test methods are referenced in EN 61442. The standard updates earlier national approvals: existing approvals remain valid but cannot be claimed as compliant with HD 629.2 S2:2006 unless the product has been specifically tested to this harmonized document.

Key Topics and Requirements

• Scope & exclusions
  • Applies to accessories for impregnated paper insulated distribution cables (HD 621).
  • Excludes special applications (submarine, shipboard, explosive atmospheres, fire‑resistant or seismic conditions).
• Accessories covered
  • Indoor/outdoor terminations (including shrouded terminations and terminal boxes)
  • Straight, branch and transition joints, and stop ends
  • Screened and unscreened separable connectors (plug‑in and bolted types)
• Rated voltage and current
  • Defines U/Uo/Um ranges for accessory ratings up to 20,8/36(42) kV and refers to cable current ratings per HD 621.
• Testing and assembly
  • Type tests performed using test cables complying with HD 620/HD 621.
  • Test assembly identification and documentation requirements (manufacturer, type, conductor/insulation ranges, kit contents, instructions).
  • Conductor cross-section guidance for tests (e.g., terminations/joints/stop ends: 120, 150, 185 or 240 mm²; separable connector sizes per the standard’s tables).
• Environmental and mechanical tests
  • Waterproofing tests (typical water height 1 m; optional higher pressure testing up to 20 m upon agreement - selected pressure must be recorded).
  • Terminal box testing options and requirements for humidity ingress.
• Reference to test methods
  • Test procedures are given by EN 61442 and other normative documents (EN 50180/50181, EN 61238‑1, HD 621, HD 620, HD 631).

Applications and Who Uses This Standard

• Manufacturers of cable accessories seeking harmonized type testing and market access across CENELEC members.
• Test laboratories performing type tests and preparing compliance reports.
• Utility engineers, specifiers and procurement teams using HD 629.2 S2:2006 to define acceptance criteria for medium‑voltage accessories on impregnated paper insulated cables.
• Design and installation contractors ensuring selected accessories meet performance and safety requirements for underground and aerial distribution systems.

Related Standards

• EN 61442 (test methods for accessories)
• HD 621 (impregnated paper insulated cables)
• HD 620 (extruded insulation cables)
• HD 629.1 S2 (accessories for extruded cables)
• EN 50180 / EN 50181 (bushings)
• EN 61238‑1 (connectors)
• HD 631 (material characterisation)

Keywords: HD 629.2 S2:2006, cable accessories, impregnated paper insulated power cables, type tests, CENELEC, EN 61442, medium voltage terminations, separable connectors, joints, stop ends.

Standards Content (Sample)

SLOVENSKI SIST HD 629.2 S2:2006

STANDARD
may 2006
Preskusne zahteve za pribor, ki se uporablja na elektroenergetskih kablih za
naznačene napetosti od 3,6/6(7,2) kV do vključno 20,8/36(42) kV – 2. del:
Kabli, izolirani z impregniranim papirjem
Test requirements on accessories for use on power cables of rated voltage from
3,6/6(7,2) kV up to 20,8/36(42) kV – Part 2: Cables with impregnated paper
insulation
ICS 29.035.10; 29.060.20 Referenčna številka
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

HARMONIZATION DOCUMENT
HD 629.2 S2
DOCUMENT D'HARMONISATION
February 2006
HARMONISIERUNGSDOKUMENT
ICS 29.060.20 Supersedes HD 629.2 S1:1997 + A1:2001

English version
Test requirements on accessories for use on power cables
of rated voltage from 3,6/6(7,2) kV up to 20,8/36(42) kV
Part 2: Cables with impregnated paper insulation

Prescriptions relatives aux essais  Prüfanforderungen für Kabelgarnituren für
sur les accessoires des câbles d'énergie Starkstromkabel mit einer Nennspannung
pour des tensions assignées von 3,6/6(7,2) kV bis 20,8/36(42) kV
de 3,6/6(7,2) kV à 20,8/36(42) kV Teil 2: Kabel mit massegetränkter
Partie 2: Câbles isolés au papier Papierisolierung
imprégné
This Harmonization Document was approved by CENELEC on 2005-09-01. 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, 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

© 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. HD 629.2 S2:2006 E
Foreword
This Harmonization Document was prepared by the Technical Committee CENELEC TC 20, Electric cables.
The text of the draft was submitted to the formal vote and was approved by CENELEC as HD 629.2 S2 on
2005-09-01.
This Harmonization Document supersedes HD 629.2 S1:1997 and its amendment A1:2001; it also includes
the changes proposed by CLC/TC 20 WG 11 as draft amendment A2.
The following dates were fixed:
– latest date by which the existence of the HD
has to be announced at national level (doa) 2006-03-01
– latest date by which the HD has to be implemented
at national level by publication of a harmonized
national standard or by endorsement (dop) 2006-09-01
– latest date by which the national standards conflicting
(dow) 2008-09-01
with the HD have to be withdrawn
This Harmonization Document has been written as part of a series of standards to satisfy the Public
Procurement Directive, and is complementary to HD 621, which covers impregnated paper insulated power
cables from 3,6/6(7,2) kV to 20,8/36(42) kV, inclusive.
This standard defines the requirements, which may be called up for joints, stop ends, separable connectors,
indoor and outdoor terminations when used with impregnated paper insulated power cables covered by
HD 621. The equivalent requirements for extruded power cables are given in HD 629.1 S2.
The test methods for these accessories are given in EN 61442.
__________
– 3 – HD 629.2 S2:2006
Contents
Page
1 Scope.4
2 Normative references .5
3 Definitions.5
4 Components .7
5 Test assemblies.8
6 Range of compliance.10
7 Test sequences .10
8 Test results .11
Annex A (informative) Identification of test cable (paper insulated) .27
Annex B (informative) Identification of test cable (extruded insulation).28
Tables
Table 1 – Test cable cross-sections for separable connectors .9
Table 2 – Indoor terminations for impregnated paper insulated cables (including shrouded terminations) .12
Table 3 – Outdoor terminations for impregnated paper insulated cables.13
Table 4 – Joints and transition joints for impregnated paper insulated cables .14
Table 5 – Stop ends for impregnated paper insulated cables .15
Table 6 – Screened separable connectors for impregnated paper insulated cables.16
Table 7 – Unscreened separable connectors (excluding shrouded terminations)
for impregnated paper insulated cables.18
Table 8 – Additional tests for non-circular conductor profile and/or insulation screen compliance .19
Table 9 – Additional tests for smallest and largest cable cross section compliance .20
Table 10 – Summary of test voltages .21
Figures
Figure 1 – Test arrangements for terminations .22
Figure 2 – Test arrangements for joints.23
Figure 3 – Test arrangements for stop ends .24
Figure 4 – Test arrangements for screened separable connectors.25
Figure 5 – Test arrangement for unscreened separable connectors .26

1 Scope
1.1 General
This standard specifies performance requirements for type tests for cable accessories for use on
impregnated paper insulated power cables as specified in HD 621.
Formerly, approvals of such products have been achieved on the basis of national standards and
specifications and/or the demonstration of satisfactory service performance. The publication of this
CENELEC standard does not invalidate existing approvals. However, products approved to such earlier
standards or specifications shall not claim approval to this CENELEC standard unless specifically tested to it.
It is not necessary to repeat these tests, once successfully completed, unless changes are made in the
materials, design or manufacturing process, which might affect the performance characteristics.
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 61442.
1.2 Type of accessories
The accessories covered by this standard are listed below:
- indoor and outdoor terminations of all designs, including terminal boxes;
- straight joints, branch joints and stop ends and transition joints of all designs, suitable for use underground
or in air;
- screened or unscreened plug-in type or bolted-type separable connectors capable of interfacing with
bushing profiles as specified in EN 50180 and EN 50181.
1.3 Rated voltage
The rated voltages U /U (U ) of the accessories covered by this standard are 3,6/6(7,2) - 3,8/6,6(7,2) -
o m
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 where:
U is the rated power-frequency voltage between conductor and earth or metallic screen, for which the cable
o
accessory is designed;
U is the rated power-frequency voltage between conductors for which the cable accessory may be used;
U is the maximum value of the 'highest system voltage' for which the cable accessory may be used.
m
1.4 Current
The continuous current rating of a termination or joint for impregnated paper insulation power cables shall be
in accordance with the appropriate cable specified in HD 621 and shall be suitable for operation at the rated
current and under short circuit fault conditions at the temperatures stated therein.
The current rating of a separable connector is governed by the current rating of the mating bushing, (see
EN 50180 and EN 50181).
– 5 – HD 629.2 S2:2006
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 50180 Bushings above 1 kV up to 36 kV and from 250 A to 3,15 kA for liquid filled
transformers
EN 50181 Plug-in type bushings above 1 kV up to 36 kV and from 250 A to 1,25 kA for
7equipment other than liquid filled transformers
EN 61238-1 Compression and mechanical connectors for power cables for rated voltages up to
= 42 kV) - Part 1: Test methods and requirements (IEC 61238-1:2003, mod.)
36 kV (U
m
EN 61442 Test methods for accessories for power cables with rated voltages from 6 kV
(U = 7,2 kV) up to 36 kV (U = 42 kV) (IEC 61442)
m m
HD 428.2.2 Three-phase oil-immersed distribution transformers 50 Hz, from 50 to 2 500 kVA with
highest voltage for equipment not exceeding 36 kV – Part 2: Distribution transformers
with cable boxes on the high-voltage and/or low-voltage side – Section 2: Cable boxes
type 1 for use on distribution transformers meeting the requirements of HD 428.2.1 S1
HD 620 Distribution cables with extruded insulation for rated voltages from 3,6/6 (7,2) kV to
20,8/36 (42) kV
HD 621 Medium voltage impregnated paper insulated distribution cables
1)
HD 631 (series) Electrical cables - Accessories - Material characterisation
IEC 60050-461 International Electrotechnical Vocabulary - Chapter 461: Electric cables
3 Definitions
For the purposes of this document, the following terms and definitions apply together with those given in
IEC 60050-461.
3.1
connector
metallic device to connect cable conductors together (IEV 461-17-03)
3.2
termination
device fitted to the end of a cable to ensure electrical connection with other parts of the system and to
maintain the insulation up to the point of connection (IEV 461-10-01)
3.3
indoor termination
termination intended for use where it is not exposed to either solar radiation or weathering
———————
1)
At draft stage.
3.4
outdoor termination
termination intended for use where it is exposed to either solar radiation or weathering or both
3.5
terminal box
air- or compound-filled box fully enclosing a termination (IEV 461-10-03 modified)
3.6
shrouded termination
indoor termination with additional insulation at the bushing connection and used in an air-filled terminal box
3.7
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
3.7.1
type I joint
joint suitable for use where an impact resistance withstand is not required
3.7.2
type II joint
joint which has an impact resistance withstand in accordance with this standard
3.8
straight joint
accessory making a connection between two cables to form a continuous circuit (IEV 461-11-01)
NOTE For types of joint see 3.7.1 and 3.7.2.
3.9
branch joint
accessory making a connection of a branch cable to a main cable (IEV 461-11-17)
NOTE For types of joint see 3.7.1 and 3.7.2.
3.10
transition joint
straight or branch joint making a connection between cables having different types of extruded insulation
(IEV 461-11-04 modified)
NOTE For types of joint see 3.7.1 and 3.7.2.
3.11
radial field joint
joint where the individual cores are screened throughout the joint
NOTE For types of joint see 3.7.1 and 3.7.2.
3.12
non-radial field joint
joint, which does not contain individual core screens
NOTE For types of joint see 3.7.1 and 3.7.2.
3.13
stop end
accessory providing a means of insulating the unconnected end of an energized cable
(IEV 461-10-07 modified)
– 7 – HD 629.2 S2:2006
3.14
separable connector
fully insulated termination permitting the connection and the disconnection of a cable to other equipment
3.15
screened separable connector
separable connector which has a fully screened external surface
3.16
unscreened separable connector
separable connector which does not have an external screen
3.17
plug-in type separable connector
separable connector in which the electrical contact is made by a sliding device
3.18
bolted-type separable connector
separable connector in which the electrical contact is made by a bolted device
3.19
tracking
irreversible degradation by formation of paths, which are conductive even under dry conditions, starting and
developing on the surface of an insulating material, and which may occur on surfaces in contact with air and
also along on the interfaces between different insulating materials
3.20
erosion
irreversible and non-conducting degradation of the surface of the insulator that occurs by loss of material, and
which may be uniform, localized or tree-shaped
NOTE Shallow surface traces, commonly tree-shaped, may occur on terminations after partial flashover. These traces are acceptable
as long as they are non-conductive. When they are conductive they are classed as tracking.
3.21
metallic housing
metal enclosure in intimate contact with the outer screen of a separable connector and having at least the
same current carrying capacity to earth as the metallic screen of the cable with which the separable
connector is to be used
4 Components
4.1 Connectors
Connectors used within the accessory shall comply with EN 61238-1 where applicable, or with another
relevant standard or specification.
4.2 Materials
It is not a pre-requirement for compliance with this performance standard but, if component material
characterization is required, the relevant part of HD 631 shall be used.

5 Test assemblies
5.1 Identification
5.1.1 Cables
The cables used for testing shall comply with HD 620 and/or HD 621 as applicable. It is recommended that
the test cables be correctly identified as in Annex A or B as appropriate.
5.1.2 Connectors
Connectors used within the accessories shall be identified by the specification with which they comply.
5.1.3 Accessories
Accessories to be tested shall be correctly identified with respect to
• name of manufacturer,
• type, designation, manufacturing date or code,
• minimum and maximum cross-sections, material and shape of cable conductor,
• minimum and maximum cable insulation diameters,
• connector type(s),
• rated voltage (see 1.3),
• installation instructions (reference and date),
• list of kit contents.
5.2 Cable conductor cross-section
Unless otherwise specified, the conductor cross-section shall be

• for terminations, joints or stop ends; 120 mm² or 150 mm² or 185 mm² or 240 mm²,
• for separable connectors, as indicated in Table 1 for each rating, using either aluminum or copper
conductors.
5.3 Assembly
Accessories shall be assembled in the manner specified in the manufacturer's instructions, with the grade
and quantity of materials supplied. A joint designed for crossed cores shall be so assembled.
5.4 Terminations
Terminations shall be tested using the arrangement and with the number of samples detailed in Figure 1.
5.5 Terminal boxes
A termination intended to be used in a metallic terminal box shall normally be tested in the specified terminal
2)
box, which shall conform to the relevant standards .
For practical reasons, it is permissible to carry out the tests with the terminations enclosed in a test terminal
box fabricated from rigid metallic mesh or from insulating material lined with metal foil. The box shall allow
humidity ingress.
———————
2)
For example HD 428.2.2.
– 9 – HD 629.2 S2:2006
The test terminal box shall be of the same shape and dimensions (e.g. creepage lengths and clearances) as
the specified terminal box and be provided with conductor terminals and bushings of the type used in service.
When only one of the termination samples is required to be tested in the terminal box (see 6.5), the remote
end of the test cable may be terminated by any suitable means.
5.6 Joints and stop ends
Joints and stop ends shall normally be designed and tested to withstand a height of water of 1 m (10 kPa
(0,1 bar)).
For special applications and in situations subject to a high water table or prone to flooding, this height of
water may be insufficient to ensure the satisfactory performance of the moisture seals. In such cases, upon
agreement between manufacturer and user, the accessories shall be tested using an increased water height
of 20 m (200 kPa (2,0 bar)).
The chosen water height shall be recorded in the test report.
Testing at one water height will achieve compliance for that pressure only. Testing at both 1 m and 20 m
water heights will achieve compliance for those water heights and all intermediate pressures.
Where a branch joint is being tested, only the main cable shall carry heating current.
5.7 Separable connectors
The cross-section of the test cable shall be as defined in Table 1.
Tests on separable connectors shall be performed with the separable connector installed on its mating bushing.
Unscreened separable connectors shall be tested at the minimum phase-to-phase and phase-to-earth
clearances recommended by the manufacturer.
Table 1 – Test cable conductor cross-sections for separable connectors
Rating of separable Cable conductor cross-section
connectors mm²
Cu Al
250 A * *
400 A 150 240
630 A * *
800 A * *
1 250 A * *
* under consideration
NOTE 1 The current value shall be sufficient to achieve the specified temperature of the
conductor, (see EN 61442, 9.1).
NOTE 2 The use of the cross-sections in Table 1 may lead to over-heating of the bushing
while achieving the required conductor temperature. Under these circumstances, it is
permissible to use a conductor one size smaller. If bushing failure occurs, the test will be
declared void (see 8.3).
5.8 Test arrangements and number of samples
These are detailed in Figures 1 to 5.
6 Range of compliance
6.1 Compliance for one type of accessory for the range of cable conductor cross-sections from 95 mm² to
300 mm² shall be obtained by successfully completing all the appropriate tests of Tables 2 to 7 of this
standard on the conductor cross-sections specified in 5.2.
Extension of this compliance for the same type of accessory on larger or smaller cable conductor cross-
sections may be obtained by satisfactory completion of the additional test sequence in Table 9, on the
appropriate conductor cross-section.
6.2 For compliance of an accessory for cable conductor cross sections outside this range the conductor
cross-section to be tested shall be subject to agreement between the interested parties.
6.3 Compliance is independent of the cable conductor material; tests may be carried out with either
aluminium or copper conductors.
6.4 Compliance for accessories tested on cables with shaped conductors shall cover the same type of
accessory when used on cables with circular conductors.
If compliance has been obtained using circular conductors, extension to shaped conductors may be obtained
by satisfactory completion of the test sequence in Table 8.
6.5 Compliance for accessories tested on cables with one type of insulation screen may be extended to
another type of insulation screen by satisfactory completion of the test sequence in Table 8.
6.6 Compliance obtained for a three-core accessory shall extend to a single-core accessory of the same
design. The converse shall not apply.
6.7 Compliance for a particular design of termination in a specified terminal box shall be obtained by the
satisfactory completion of the test sequence in Table 2. If compliance has already been obtained for a
termination design separate from the terminal box, it is necessary to carry out the test sequence with only one
of the terminations in a terminal box.
Satisfactory completion of the appropriate tests of Table 2 for a termination for one design of terminal box
may allow the compliance to be extended to that termination in another terminal box design by comparison of
the detail drawings of the boxes. If there are differences in the design and/or dimensions, the impulse voltage
test at ambient temperature shall be repeated, by agreement between the manufacturer and the customer.
6.8 Compliance shall be restricted to the electrical design and type of cables (i.e. belted or radial field,
draining or non draining) on which tests have been conducted.
7 Test sequences
The test sequences for the various types of accessory are detailed in Tables 2 to 7, with additional tests in
Tables 8 and 9. The test voltages are summarized in Table 10.
7.1 Dynamic short circuit performance
This test is a three-phase test required for single-core cable accessories designed for initial peak current
larger than 80 kA and for three-core cable accessories designed for initial peak current larger than 63 kA.

– 11 – HD 629.2 S2:2006
Class 1 Three core accessories designed for initial peak currents above 63 kA up to and including 80 kA.
The test current shall be 80 kA initial peak.
Class 2 Three core and single core accessories designed for initial peak currents above 80 kA up to and
including 100 kA.
The test current shall be 100 kA initial peak.
Class 3 Three core and single core accessories designed for initial peak currents above 100 kA up to
and including 125 kA.
The test current shall be 125 kA initial peak.
8 Test results
8.1 General
All test samples shall meet the requirements of the relevant test sequence.
The examination at the end of a test sequence is for information only but the results shall be recorded in the
test report.
8.2 Test reports
Written reports on type tests proving compliance with this standard shall be made available to the customer.
The details of the test arrangements, the sequence of tests and details of the accessory tested including, for
example, cross-section of conductors, type of conductor connectors, minimum clearance be
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