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 (IEC 61238-1-3:2018)

This part of EN 61238 applies to compression and mechanical connectors for power cables for rated voltages above 1 kV (Um = 1,2 kV) up to 36 kV (Um = 42 kV), for example buried cables or cables installed in buildings, having
a) conductors complying with EN 60228 having nominal cross-sectional areas between 2,5 mm2 and 1 200 mm2 for copper and between 16 mm2 and 1 200 mm2 for aluminium, excluding Milliken conductors;
b) a maximum continuous conductor temperature not exceeding 90 °C.
This document is not applicable to connectors for overhead line conductors nor to connectors with a sliding contact.
The object of this document is to define the type test methods and requirements which apply to compression and mechanical connectors for power cables with copper or aluminium conductors. The reference method is to perform the tests on unused conductors.

Pressverbinder und Schraubverbinder für Starkstromkabel - Teil 1-3: Prüfverfahren für und Anforderungen an Pressverbinder und Schraubverbinder für Starkstromkabel für Nennspannungen über 1 kV (Um = 1,2 kV) bis zu 36 kV (Um = 42 kV), geprüft an nicht isolierten Leitern (IEC 61238-1-3:2018)

Raccords sertis et à serrage mécanique pour câbles d’énergie - Partie 1-3: Méthodes et exigences d’essai relatives aux raccords sertis et à serrage mécanique pour les câbles d’énergie de tensions assignées supérieures à 1 kV (Um = 1,2 kV) jusqu’à 36 kV (Um = 42 kV) soumis à essai sur des conducteurs non isolés (IEC 61238-1-3:2018)

L’IEC 61238-1-3:2018 est applicable aux raccords sertis et à serrage mécanique pour câbles d'énergie de tensions assignées supérieures à 1 kV (Um = 1,2 kV) jusqu’à 30 kV (Um = 36 kV), par exemple pour les câbles enterrés ou ceux installés à l'intérieur des bâtiments, ayant
a) des âmes conformes à l’IEC 60228, de section nominale comprise entre 2,5 mm2 et 1 200 mm2 pour le cuivre et entre 16 mm2 et 1 200 mm2 pour l’aluminium, à l’exception des âmes Milliken;
b) une température maximale de fonctionnement en service permanent au plus égale à 90 °C.
Le présent document n'est pas applicable aux raccords pour conducteurs de ligne aérienne ni aux raccords équipés d’un contact glissant.
L'objet du présent document est de définir les méthodes d'essais de type et les exigences qui s’appliquent aux raccords sertis et à serrage mécanique utilisables sur les câbles d'énergie à conducteurs en cuivre ou en aluminium. La méthode de référence consiste à réaliser les essais sur des conducteurs neufs.
Cette première édition, conjointement avec l'IEC 61238-1-1 et l'IEC 61238-1-2, annule et remplace l'IEC 61238-1:2003.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'IEC 61238-1:2003:
a) Le domaine d’application a été élargi afin de couvrir les raccords de connexion pour âmes jusqu’à 2,5 mm2 (précédemment 10 mm2); il a été limité à 1 200 mm2 pour les âmes en cuivre et en aluminium car les expériences et applications d’essai des raccords à perforation d’isolant sont rares pour les âmes de fortes sections.
b) Une nouvelle classe mécanique a été introduite pour répondre à la demande concernant les raccords soumis à des forces mécaniques supérieures à celles spécifiées dans la Classe 1 pour les âmes de fortes sections.
c) Pour l’essai électrique, un courant de chauffage élevé maximal a été défini afin d’éviter l’apparition de densités de courant irréalistes pendant l’essai, qui peuvent modifier les propriétés des raccords en essai.
d) Pour l’essai de court-circuit, la méthode de calcul et les exigences ont été mises à jour.
e) Pour l’essai mécanique, les méthodes et exigences ont été mises à jour.
f) Une proposition d’essai électrique sur les cosses d’extrémité de câble a été introduite pour les applications de connecteurs séparables.

Stisljivi in vijačni konektorji za električne kable - 1-3. del: Preskusne metode in zahteve za stisljive in vijačne konektorje za električne kable za naznačene napetosti nad 1 kV (Um = 1,2 kV) do 36 kV (Um = 42 kV), preskušene na neizoliranih vodnikih (IEC 61238-1-3:2018)

Ta del standarda EN 61238 se uporablja za stisljive in vijačne konektorje za električne kable za naznačene napetosti nad 1 kV (Um = 1,2 kV) do 36 kV (Um = 42 kV), na primer za v zemljo položene kable ali kable, vgrajene v stavbah, ki imajo:
a) vodnike, ki so skladni s standardom EN 60228 ter imajo nominalni premer med 2,5 mm2 in 1200 mm2, če so bakreni, ter med 16 mm2 in 1200 mm2, če so aluminijasti, razen segmentnih vodnikov.
b) največjo enakomerno temperaturo vodnika, ki ne presega 90 °C.
Ta dokument se ne uporablja za konektorje vodnikov nadzemnih vodov ali za konektorje z drsnimi kontakti.
Namen tega dokumenta je opredeliti metode in zahteve tipskih preskusov, ki se uporabljajo za stisljive in vijačne konektorje za električne kable z bakrenimi ali aluminijastimi vodniki. Referenčna metoda je namenjena za izvajanje preskusov na neuporabljenih vodnikih.

General Information

Status
Published
Public Enquiry End Date
31-May-2019
Publication Date
03-Oct-2019
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Oct-2019
Due Date
06-Dec-2019
Completion Date
04-Oct-2019

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SLOVENSKI STANDARD
SIST EN IEC 61238-1-3:2019
01-december-2019
Nadomešča:
SIST EN 61238-1:2004

Stisljivi in vijačni konektorji za električne kable - 1-3. del: Preskusne metode in

zahteve za stisljive in vijačne konektorje za električne kable za naznačene
napetosti nad 1 kV (Um = 1,2 kV) do 36 kV (Um = 42 kV), preskušene na
neizoliranih vodnikih (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 (Um = 1,2 kV) up to 36 kV (Um = 42 kV) tested on non-insulated

conductors (IEC 61238-1-3:2018)

Pressverbinder und Schraubverbinder für Starkstromkabel - Teil 1-3: Prüfverfahren für

und Anforderungen an Pressverbinder und Schraubverbinder für Starkstromkabel für

Nennspannungen über 1 kV (Um = 1,2 kV) bis zu 36 kV (Um = 42 kV), geprüft an nicht

isolierten Leitern (IEC 61238-1-3:2018)

Raccords sertis et à serrage mécanique pour câbles d’énergie - Partie 1-3: Méthodes et

exigences d’essai relatives aux raccords sertis et à serrage mécanique pour les câbles

d’énergie de tensions assignées supérieures à 1 kV (Um = 1,2 kV) jusqu’à 36 kV (Um =

42 kV) soumis à essai sur des conducteurs non isolés (IEC 61238-1-3:2018)
Ta slovenski standard je istoveten z: EN IEC 61238-1-3:2019
ICS:
29.060.20 Kabli Cables
29.120.20 Spojni elementi Connecting devices
SIST EN IEC 61238-1-3:2019 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN IEC 61238-1-3:2019
---------------------- Page: 2 ----------------------
SIST EN IEC 61238-1-3:2019
EUROPEAN STANDARD EN IEC 61238-1-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2019
ICS 29.060.20 Supersedes EN 61238-1:2003 (partially) and all of its
amendments and corrigenda (if any)
English Version
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 36 kV (U = 42 kV) tested on
m m
non-insulated conductors
(IEC 61238-1-3:2018)

Raccords sertis et à serrage mécanique pour câbles Pressverbinder und Schraubverbinder für Starkstromkabel -

d'énergie - Partie 1-3: Méthodes et exigences d'essai Teil 1-3: Prüfverfahren für und Anforderungen an

relatives aux raccords sertis et à serrage mécanique pour Pressverbinder und Schraubverbinder für Starkstromkabel

les câbles d'énergie de tensions assignées supérieures à für Nennspannungen über 1 kV (U = 1,2 kV) bis zu 36 kV

1 kV (U = 1,2 kV) jusqu'à 36 kV (U = 42 kV) soumis à (U = 42 kV), geprüft an nicht isolierten Leitern

m m m
essai sur des conducteurs non isolés (IEC 61238-1-3:2018)
(IEC 61238-1-3:2018)

This European Standard was approved by CENELEC on 2019-07-19. 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,

Turkey 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

© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 61238-1-3:2019 E
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SIST EN IEC 61238-1-3:2019
EN IEC 61238-1-3:2019 (E)
European foreword

This document (EN IEC 61238-1-3:2019) consists of the text of IEC 61238-1-3:2018 prepared by

IEC/TC 20 "Electric cables".
The following dates are fixed:
• latest date by which this document has to be (dop) 2020-07-19
implemented at national level by publication of an
identical national standard or by endorsement
• latest date by which the national standards (dow) 2022-07-19
conflicting with this document have to be withdrawn

This document partially supersedes EN 61238-1:2003 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.

Endorsement notice

The text of the International Standard IEC 61238-1-3:2018 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 standards

indicated:
IEC 61238-1 NOTE Harmonized as EN 61238-1.
IEC 61238-1-1 NOTE Harmonized as EN IEC 61238-1-1.
IEC 61238-1-2 NOTE Harmonized as EN IEC 61238-1-2.
IEC 62475:2010 NOTE Harmonized as EN 62475:2010 (not modified).
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SIST EN IEC 61238-1-3:2019
EN IEC 61238-1-3:2019 (E)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

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.

NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the relevant

EN/HD applies.

NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:

www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60050-461 - International Electrotechnical Vocabulary - - -
Part 461: Electric cables
IEC 60228 - Conductors of insulated cables EN 60228 -
IEC 60493-1 - Guide for the statistical analysis of ageing - -
test data - Part 1: Methods based on mean
values of normally distributed test results
IEC 60949 1988 Calculation of thermally permissible short-- -
+ A1 2008 circuit currents, taking into account non-
adiabatic heating effects
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SIST EN IEC 61238-1-3:2019
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SIST EN IEC 61238-1-3:2019
IEC 61238-1-3
Edition 1.0 2018-05
INTERNATIONAL
STANDARD
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 conductors
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.060.20 ISBN 978-2-8322-5647-3

Warning! Make sure that you obtained this publication from an authorized distributor.

® Registered trademark of the International Electrotechnical Commission
---------------------- Page: 7 ----------------------
SIST EN IEC 61238-1-3:2019
– 2 – IEC 61238-1-3:2018 © IEC 2018
CONTENTS

FOREWORD ........................................................................................................................... 5

INTRODUCTION ..................................................................................................................... 7

1 Scope .............................................................................................................................. 8

2 Normative references ...................................................................................................... 8

3 Terms and definitions ...................................................................................................... 8

4 Symbols ........................................................................................................................ 10

5 General ......................................................................................................................... 11

5.1 Definition of classes .............................................................................................. 11

5.2 Conductor ............................................................................................................. 11

5.3 Connectors and installation procedure .................................................................. 12

5.4 Range of approval................................................................................................. 12

6 Electrical tests ............................................................................................................... 13

6.1 Installation ............................................................................................................ 13

6.1.1 General ......................................................................................................... 13

6.1.2 Through connectors and terminations ............................................................ 14

6.1.3 Branch connectors ......................................................................................... 14

6.2 Measurements ...................................................................................................... 14

6.2.1 General ......................................................................................................... 14

6.2.2 Electrical resistance measurements ............................................................... 14

6.2.3 Temperature measurements .......................................................................... 15

6.3 Heat cycling test ................................................................................................... 15

6.3.1 General ......................................................................................................... 15

6.3.2 First heat cycle .............................................................................................. 15

6.3.3 Second heat cycle ......................................................................................... 16

6.3.4 Subsequent heat cycles ................................................................................. 17

6.4 Short-circuit test ................................................................................................... 18

6.4.1 General ......................................................................................................... 18

6.4.2 Aluminium conductors with cross-sectional areas below 1 000 mm and

copper conductors with cross-sectional areas below 630 mm ....................... 18

6.4.3 Aluminium conductors with cross-sectional areas ≥ 1 000 mm and

copper conductors with cross-sectional areas ≥ 630 mm .............................. 19

6.5 Assessment of results ........................................................................................... 19

6.6 Requirements ....................................................................................................... 19

6.7 Examples of electrical test loop configurations and associated parameters ........... 20

7 Mechanical test ............................................................................................................. 26

7.1 General ................................................................................................................. 26

7.2 Method ................................................................................................................. 26

7.3 Requirements ....................................................................................................... 27

8 Test report ..................................................................................................................... 27

8.1 General ................................................................................................................. 27

8.2 Electrical tests ...................................................................................................... 27

8.3 Mechanical test ..................................................................................................... 27

Annex A (normative) Equalizers and their preparation .......................................................... 28

A.1 Requirements for equalizers ................................................................................. 28

A.2 Recommendations for welding equalizers ............................................................. 28

Annex B (normative) Measurements .................................................................................... 30

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SIST EN IEC 61238-1-3:2019
IEC 61238-1-3:2018 © IEC 2018 – 3 –

B.1 Potential measuring positions for typical connectors ............................................. 30

B.2 Temperature measurement ................................................................................... 30

B.3 Equivalent conductor resistance ........................................................................... 30

Annex C (informative) Recommendations to decrease uncertainties of measurement .......... 31

C.1 Handling the test loop ........................................................................................... 31

C.2 Measurements, instruments and readings ............................................................. 31

Annex D (normative) Calculation of adiabatic short-circuit current ........................................ 32

Annex E (informative) Determination of the value of the short-circuit current ........................ 33

Annex F (normative) Calculation method .............................................................................. 34

F.1 General ................................................................................................................. 34

F.2 Measurements made ............................................................................................. 34

F.3 Connector resistance factor k ................................................................................ 34

F.4 Initial scatter δ ...................................................................................................... 35

F.5 Mean scatter β ...................................................................................................... 35

F.6 Change in resistance factor of each connector ...................................................... 37

F.6.1 General ......................................................................................................... 37

F.6.2 Line of best fit ................................................................................................ 37

F.6.3 Confidence interval δ .................................................................................... 37

F.6.4 Change in resistance factor D ........................................................................ 38

F.7 Resistance factor ratio λ........................................................................................ 38

F.8 Maximum temperatures θ ............................................................................... 38

max

Annex G (informative) Explanation on assessment of results of electrical tests on

connectors ............................................................................................................................ 39

G.1 History .................................................................................................................. 39

G.2 Short examination of the assessment methods of IEC 61238-1 compared

with the Italian standard CEI 20-28 and the British standard BS 4579-3 ................ 39

G.3 The IEC 61238-1 method of assessing test results ................................................ 40

Annex H (informative) Electrical tests on cable terminal lugs for application in

separable connectors ............................................................................................................ 42

H.1 Principle ............................................................................................................... 42

H.2 Lengths ................................................................................................................. 42

H.3 Temperature measurement ................................................................................... 42

H.4 Median connector ................................................................................................. 43

H.5 Electrical test parameters ..................................................................................... 43

Bibliography .......................................................................................................................... 44

Figure 1 – Example of second heat cycle profile ................................................................... 17

Figure 2 – Typical electrical test loops for through connectors and terminal lugs ................... 22

Figure 3 – Typical electrical test loop for branch connectors ................................................. 23

Figure 4 – Typical cases of resistance measurements .......................................................... 26

Figure A.1 – Preparation of equalizers .................................................................................. 29

Figure E.1 – Determination of equivalent RMS value of current during the short-circuit test .. 33

Figure F.1 – Graphic example of assessment of a Class A individual connector .................... 36

Figure H.1 – Test arrangement ............................................................................................. 43

Table 1 – Minimum period of temperature stability ................................................................ 16

Table 2 – Electrical resistance measurements during the electrical test ................................ 18

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SIST EN IEC 61238-1-3:2019
– 4 – IEC 61238-1-3:2018 © IEC 2018

Table 3 – Electrical test requirements ................................................................................... 20

Table 4 – Selection of tensile force withstand values for the mechanical test ........................ 27

Table D.1 – Material properties ............................................................................................. 32

Table G.1 – Summary of assessed behaviour of a tested connector ...................................... 40

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SIST EN IEC 61238-1-3:2019
IEC 61238-1-3:2018 © IEC 2018 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
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 conductors
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 in addition to other activities, IEC publishes International Standards, Technical Specifications,

Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC

Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested

in the subject dealt with may participate in this preparatory work. International, governmental and non-

governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely

with the International Organization for Standardization (ISO) in accordance with conditions determined by

agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence

between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

the latter.

5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

Publications.

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.

International Standard IEC 61238-1-3 has been prepared by IEC technical committee 20:

Electric cables.

This first edition, together with IEC 61238-1-1 and IEC 61238-1-2, cancels and replaces

IEC 61238-1:2003.

This edition includes the following significant technical changes with respect to

IEC 61238-1:2003:

a) The scope has been widened to cover connectors for conductors from 10 mm down to

2 2
2,5 mm and has been limited to 1 200 mm for connectors for copper and aluminium

conductors because test experience and applications are rare for conductors of larger

cross-sectional areas.
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SIST EN IEC 61238-1-3:2019
– 6 – IEC 61238-1-3:2018 © IEC 2018

b) A new mechanical class has been introduced to satisfy the demand for connectors

subjected to higher mechanical forces than those specified in Class 1 for conductors of

larger cross-sectional areas.

c) For the electrical test, a maximum elevated heating current has been set in order to avoid

unrealistic current densities during the test which may change the properties of tested

connectors.

d) For the short-circuit test, the method of calculation and requirements have been updated.

e) For the mechanical test, the methods and requirements have been updated.

f) A proposal for an electrical test on cable terminal lugs for application in separable

connectors has been introduced.
The text of this standard is based on the following documents:
FDIS Report on voting
20/1790/FDIS 20/1805/RVD

Full information on the voting for the approval of this International Standard can be found in

the report on voting indicated in the above table.

This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

A list of all parts in the IEC 61238 series, published under the general title Compression and

mechanical connectors for power cables, can be found on the IEC website.

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under "http://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.
A bilingual version of this publication may be issued at a later date.
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SIST EN IEC 61238-1-3:2019
IEC 61238-1-3:2018 © IEC 2018 – 7 –
INTRODUCTION
The IEC 61238 series has been divided into the following parts:

Part 1-1: Test methods and requirements for compression and mechanical connectors for

power cables for rated voltages up to 1 kV (U = 1,2 kV) tested on non-insulated
conductors

Part 1-2: Test methods and requirements for insulation piercing connectors for power

cables for rated voltages up to 1 kV (U = 1,2 kV) tested on insulated conductors

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 conductors

This Part 1-3 of IEC 61238 deals with type tests for compression and mechanical connectors

for use on copper or aluminium conductors of power cables for rated voltages above 1 kV

(U = 1,2 kV) up to 30 kV (U = 36 kV).
m m

When a design of connector meets the requirements of this document, then it is expected that

in service:
a) the resistance of the connection will remain stable within specified limits;

b) the temperature of the connector will be of the same order or less than that of the

conductor during current heating;

c) if the intended use demands it, application of short-circuit currents will not affect a)

and b);

d) independently from the electrical performance, conforming axial tensile strength will

ensure an acceptable mechanical performance for the connections to the cable
conductors.

It should be stressed that, although the object of the electrical and mechanical tests specified

in this document is to prove the suitability of connectors for most operating conditions, they do

not necessarily apply to situations where a connector may be raised to a high temperature by

virtue of connection to a highly rated plant, to corrosive conditions, or where the connector is

subjected to external mechanical stresses such as excessive vibration, shock and large

displacement after installation. In these instances, the tests in this document may need to be

supplemented by special tests agreed between supplier and purchaser.

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.

Once successfully completed, these tests are not repeated unless changes are made in

material, manufacturing process and design which might adversely change the connector

performance characteristics.
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SIST EN IEC 61238-1-3:2019
– 8 – IEC 61238-1-3:2018 © IEC 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 conductors
1 Scope

This part of IEC 61238 applies to compression and mechanical connectors for power cables

for rated voltages above 1 kV (U = 1,2 kV) up to 30 kV (U = 36 kV), for example buried

m m
cables or cables installed in buildings, having

a) conductors complying with IEC 60228 having nominal cross-sectional areas between

2 2 2 2
2,5 mm and 1 200 mm for copper and between 16 mm and 1 200 mm for aluminium,
excluding Milliken conductors;
b) a maximum continuous conductor temperature not exceeding 90 °C.

This document is not applicable to connectors for overhead line conductors nor to connectors

with a sliding contact.

The object of this document is to define the type test methods and requirements which apply

to compression and mechanical connectors for power cables with copper or aluminium

conductors. The reference method is to perform the tests on unused conductors.
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
...

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