IEC 60840

Power cables with extruded insulation and their accessories for rated voltages above 30 kV (<i>U</i>_m = 36 kV) up to 150 kV (<i>U</i>_m = 170 kV) - Test methods and requirements

IEC 60840:2011 is available as IEC 60840:2011 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 60840:2011 specifies test methods and requirements for power cable systems, cables alone and accessories alone, for fixed installations     and for  rated voltages above 30 kV (U_m = 36 kV) up to   and including 150 kV (U_m = 170 kV). The requirements apply to single-core cables and to individually screened three-core cables and to their accessories for usual conditions of installation          and operation, but not to special  cables and their accessories,  such as submarine cables, for which modifications to the standard tests may be necessary or special test    conditions may  need to be   devised. This standard does not cover transition joints between cables with extruded insulation and paper insulated cables. The significant technical change with respect to the previous edition is     as follows:
- introduction of a prequalification test procedure for cables with high electrical stresses and tested as a cable system including accessories.
NOTE: For a more detailed history of events leading up to this fourth edition, see the Introduction.

Câbles d'énergie à isolation extrudée et leurs accessoires pour des tensions assignées supérieures à 30 kV (<i>U</i>_m = 36 kV) et jusqu'à 150 kV (<i>U</i>_m = 170 kV) - Méthodes et exigences d'essai

IEC 60840:2011 est disponible sous forme de IEC 60840:2011 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.

IEC 60840:2011 spécifie les méthodes et les exigences d'essai applicables aux systèmes de câbles d'énergie, câbles seuls et accessoires seuls, pour installations fixes, pour des tensions assignées supérieures à 30 kV (U_m = 36 kV) et jusqu'à 150 kV (U_m = 170 kV) compris. Les exigences sont applicables aux câbles unipolaires, aux câbles tripolaires à écran individuel et à leurs accessoires, pour des conditions habituelles d'installation et de fonctionnement, mais ne le sont pas à des câbles spéciaux et à leurs accessoires, comme les câbles sous-marins,  pour lesquels il peut être nécessaire d'apporter des modifications aux essais normaux ou d'élaborer des conditions d'essai particulières. Les jonctions assurant le raccordement des câbles à isolant extrudé aux câbles isolés au papier ne sont pas couvertes par la présente norme. La modification technique principale par rapport à l'édition précédente est la suivante:
- introduction d'une procédure d'essai de préqualification pour les câbles avec de hautes tensions électriques comme un système de câble incluant des accessoires.
  NOTE: Voir l'Introduction pour un historique plus complet sur les evenements qui conduissaient à la publication de cette quatrième édition.

Elektroenergetski kabli z ekstrudirano izolacijo in njihov pribor za naznačene napetosti nad 30 kV (Um = 36 kV) do 150 kV (Um = 170 kV) - Preskusne metode in zahteve

Standard IEC 60840:2011 določa preskusne metode in zahteve za sisteme močnostnih kablov, same kable in sam pribor, za fiksne namestitve in za nazivne napetosti nad 30 kV do vključno 150 kV. Zahteve se uporabljajo za enožilne kable in za individualno zaslonjene trižilne kable ter za njihov pribor za običajne pogoje montaže in delovanja, ne pa za posebne kable in njihov pribor, kot so podvodni kabli, za katere so morda potrebne spremembe standardnih preskusov ali pa je treba zasnovati posebne preskusne pogoje. Ta standard ne zajema prehodnih spojk med kabli z ekstrudirano izolacijo in papirnato izoliranih kablov. Znatna tehnična sprememba glede na predhodno različico je naslednja: vpeljava predizbirnega preskusnega postopka za kable z visoko električno obremenitvijo, preizkušene kot kabelski sistem, vključno s priborom.
OPOMBA: Za podrobnejšo zgodovino dogodkov, na podlagi katerih je nastala ta četrta izdaja, glej poglavje Uvod.

General Information

• Status: Not Published
• ICS: 29.060.20 - Cables
• Technical Committee: TA 20 - Analogue and digital audio
• Current Stage: PPUB - Publication issued
• Start Date: 23-Nov-2011
• Ref Project: SIST IEC 60840:2018 - Power cables with extruded insulation and their accessories for rated voltages above 30 kV (Um = 36 kV) up to 150 kV (Um = 170 kV) - Test methods and requirements

Standards Content (Sample)

SLOVENSKI STANDARD
SIST IEC 60840:2018
01-december-2018
(OHNWURHQHUJHWVNLNDEOL]HNVWUXGLUDQRL]RODFLMRLQQMLKRYSULERU]DQD]QDþHQH
QDSHWRVWLQDGN98P N9GRN98P N93UHVNXVQHPHWRGHLQ
]DKWHYH
Power cables with extruded insulation and their accessories for rated voltages above 30
kV (Um = 36 kV) up to 150 kV (Um = 170 kV) - Test methods and requirements
Câbles d'énergie à isolation extrudée et leurs accessoires pour des tensions assignées
supérieures à 30 kV (Um = 36 kV) et jusqu'à 150 kV (Um = 170 kV) - Méthodes et
exigences d'essai
Ta slovenski standard je istoveten z: IEC 60840
ICS:
29.060.20 Kabli Cables
SIST IEC 60840:2018 en,fr
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST IEC 60840:2018

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SIST IEC 60840:2018
IEC 60840
®

Edition 4.0 2011-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE


Power cables with extruded insulation and their accessories for rated voltages
above 30 kV (U = 36 kV) up to 150 kV (U = 170 kV) – Test methods and
m m
requirements

Câbles d'énergie à isolation extrudée et leurs accessoires pour des tensions
assignées supérieures à 30 kV (U = 36 kV) et jusqu'à 150 kV (U = 170 kV) –
m m
Méthodes et exigences d'essai

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XB
ICS 29.060.20 ISBN 978-2-88912-752-8

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST IEC 60840:2018
– 2 – 60840 © IEC:2011
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 9
2 Normative references. 9
3 Terms and definitions . 10
3.1 Definitions of dimensional values (thicknesses, cross-sections, etc.) . 10
3.2 Definitions concerning tests . 11
3.3 Other definitions . 11
4 Voltage designations and materials . 12
4.1 Rated voltages . 12
4.2 Cable insulating materials . 12
4.3 Cable metal screens/sheaths . 12
4.4 Cable oversheathing materials . 12
5 Precautions against water penetration in cables . 12
6 Cable characteristics . 13
7 Accessory characteristics. 13
8 Test conditions . 14
8.1 Ambient temperature . 14
8.2 Frequency and waveform of power frequency test voltages . 14
8.3 Waveform of lightning impulse test voltages . 14
8.4 Relationship of test voltages to rated voltages . 14
8.5 Determination of the cable conductor temperature . 14
9 Routine tests on cables and on the main insulation of prefabricated accessories . 15
9.1 General . 15
9.2 Partial discharge test . 15
9.3 Voltage test . 15
9.4 Electrical test on oversheath of the cable . 15
10 Sample tests on cables . 16
10.1 General . 16
10.2 Frequency of tests . 16
10.3 Repetition of tests . 16
10.4 Conductor examination . 16
10.5 Measurement of electrical resistance of conductor and metal screen . 16
10.6 Measurement of thickness of cable insulation and oversheath . 17
10.6.1 General . 17
10.6.2 Requirements for the insulation . 17
10.6.3 Requirements for the cable oversheath . 17
10.7 Measurement of thickness of metal sheath. 18
10.7.1 Lead or lead alloy sheath . 18
10.7.2 Plain or corrugated aluminium sheath . 18
10.8 Measurement of diameters . 19
10.9 Hot set test for XLPE, EPR and HEPR insulations . 19
10.9.1 Procedure . 19
10.9.2 Requirements . 19
10.10 Measurement of capacitance. 19

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SIST IEC 60840:2018
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10.11 Measurement of density of HDPE insulation . 19
10.11.1 Procedure . 19
10.11.2 Requirements . 19
10.12 Lightning impulse voltage test . 19
10.13 Water penetration test. 20
10.14 Tests on components of cables with a longitudinally applied metal tape or
foil, bonded to the oversheath . 20
11 Sample tests on accessories . 20
11.1 Tests on components . 20
11.2 Tests on complete accessory . 20
12 Type tests on cable systems . 20
12.1 General . 20
12.2 Range of type approval . 21
12.3 Summary of type tests . 21
12.4 Electrical type tests on complete cable systems . 22
12.4.1 Test voltage values . 22
12.4.2 Tests and sequence of tests . 22
12.4.3 Bending test . 23
12.4.4 Partial discharge tests . 24
12.4.5 Tan δ measurement . 24
12.4.6 Heating cycle voltage test . 24
12.4.7 Lightning impulse voltage test followed by a power frequency voltage
test . 25
12.4.8 Examination . 25
12.4.9 Resistivity of semi-conducting screens . 25
12.5 Non-electrical type tests on cable components and on complete cable . 26
12.5.1 Check of cable construction . 26
12.5.2 Tests for determining the mechanical properties of insulation before
and after ageing . 26
12.5.3 Tests for determining the mechanical properties of oversheaths
before and after ageing . 27
12.5.4 Ageing tests on pieces of complete cable to check compatibility of
materials . 27
12.5.5 Loss of mass test on PVC oversheaths of type ST . 28
2
12.5.6 Pressure test at high temperature on oversheaths . 28
12.5.7 Test on PVC oversheaths (ST ST ) at low temperature . 28
1, 2
12.5.8 Heat shock test for PVC oversheaths (ST and ST ) . 29
1 2
12.5.9 Ozone resistance test for EPR and HEPR insulations . 29
12.5.10 Hot set test for EPR, HEPR and XLPE insulations . 29
12.5.11 Measurement of density of HDPE insulation . 29
12.5.12 Measurement of carbon black content of black PE oversheaths (ST
3
and ST ). 29
7
12.5.13 Test under fire conditions . 29
12.5.14 Water penetration test . 30
12.5.15 Tests on components of cables with a longitudinally applied metal
tape or foil, bonded to the oversheath . 30
12.5.16 Shrinkage test for PE, HDPE and XLPE insulations . 30
12.5.17 Shrinkage test for PE oversheaths (ST and ST ) . 30
3 7
12.5.18 Determination of hardness of HEPR insulation . 30
12.5.19 Determination of the elastic modulus of HEPR insulation . 31

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SIST IEC 60840:2018
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13 Prequalification test of the cable system. 31
13.1 General and range of prequalification test approval . 31
13.2 Prequalification test on complete system . 32
13.2.1 Summary of prequalification tests . 32
13.2.2 Test voltage values . 32
13.2.3 Test arrangement . 32
13.2.4 Heating cycle voltage test . 33
13.2.5 Lightning impulse voltage test . 34
13.2.6 Examination . 34
13.3 Tests for the extension of the prequalification of a cable system. 34
13.3.1 Summary of the extension of prequalification test . 34
13.3.2 Electrical part of the extension of prequalification tests on complete
cable system. 34
14 Type tests on cables . 36
14.1 General . 36
14.2 Range of type approval . 36
14.3 Summary of type tests . 37
14.4 Electrical type tests on completed cables . 37
15 Type tests on accessories . 38
15.1 General . 38
15.2 Range of type approval . 38
15.3 Summary of type tests . 38
15.4 Electrical type tests on accessories . 39
15.4.1 Test voltage values . 39
15.4.2 Tests and sequence of tests . 39
16 Electrical tests after installation . 40
16.1 General . 40
16.2 DC voltage test of the oversheath . 40
16.3 AC voltage test of the insulation . 40
Annex A (informative) Determination of the cable conductor temperature . 47
Annex B (normative) Rounding of numbers . 52
Annex C (informative) List of type, prequalification and extension of prequalification
tests for cable systems, cables and accessories . 53
Annex D (normative) Method of measuring resistivity of semi-conducting screens . 56
Annex E (normative) Water penetration test . 58
Annex F (normative) Tests on components of cables with a longitudinally applied metal
tape or foil, bonded to the oversheath . 60
Annex G (normative) Tests of outer protection for joints . 63
Annex H (normative) Determination of hardness of HEPR insulations . 65
Bibliography . 67

Figure 1 – Example of the test arrangement for the prequalification test. 33
Figure 2 – Example of extension of prequalification test arrangement for the
prequalification of a system with another joint, designed for rigid and flexible installation . 35
Figure A.1 – Typical test set-up for the reference loop and the main test loop . 48
Figure A.2 – Example of an arrangement of the temperature sensors on the conductor
of the reference loop . 49

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SIST IEC 60840:2018
60840 © IEC:2011 – 5 –
Figure D.1 – Preparation of samples for measurement of resistivity ofconductor and
insulation screens . 57
Figure E.1 – Schematic diagram of apparatus for water penetration test . 59
Figure F.1 – Adhesion of metal foil . 60
Figure F.2 – Example of overlapped metal foil . 61
Figure F.3 – Peel strength of overlapped metal foil . 61
Figure H.1 – Test on surfaces of large radius of curvature . 66
Figure H.2 – Test on surfaces of small radius of curvature . 66

Table 1 – Insulating compounds for cables . 40
Table 2 – Oversheathing compounds for cables . 41
Table 3 – Tan δ requirements for insulating compounds for cables . 41
Table 4 – Test voltages . 41
Table 5 – Non-electrical type tests for insulating and oversheathing compounds for
cables . 42
Table 6 – Test requirements for mechanical characteristics of insulating compounds for
cables (before and after ageing) . 43
Table 7 – Test requirements mechanical characteristics of oversheathing compounds
for cables (before and after ageing) . 44
Table 8 – Test requirements for particular characteristics of insulating compounds for
cables . 45
Table 9 – Test requirements for particular characteristics of PVC oversheathing for
cables . 46
Table C.1 – Type tests on cable systems, on cables and on accessories . 54
Table C.2 – Prequalification tests on cable systems with a calculated nominal
conductor electric stress above 8,0 kV/mm or a calculated nominal insulation electric
stress above 4,0 kV/mm . 54
Table C.3 – Extension of prequalification tests on cable systems with a calculated
nominal conductor electric stress above 8,0 kV/mm or a calculated nominal insulation
electric stress above 4,0 kV/mm . 55
Table G.1 – Impulse voltage tests . 64

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SIST IEC 60840:2018
– 6 – 60840 © IEC:2011
INTERNATIONAL ELECTROTECHNICAL COMMISSION
______________

POWER CABLES WITH EXTRUDED INSULATION AND
THEIR ACCESSORIES FOR RATED VOLTAGES ABOVE 30 kV
(U = 36 kV) UP TO 150 kV (U = 170 kV) –
m m
TEST METHODS AND REQUIREMENTS


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
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2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
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interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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6) All users should ensure that they have the latest edition of this publication.
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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.
International Standard IEC 60840 has been prepared by IEC technical committee 20: Electric
cables.
This fourth edition cancels and replaces the third edition, published in 2004, and constitutes a
major technical revision.
The significant technical change with respect to the previous edition is as follows:
– introduction of a prequalification test procedure for cables with high electrical stresses and
tested as a cable system including accessories.
NOTE For a more detailed history of events leading up to this fourth edition, see the Introduction.

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SIST IEC 60840:2018
60840 © IEC:2011 – 7 –
The text of this standard is based on the following documents:
FDIS Report on voting
20/1267/FDIS 20/1277A/RVD

Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this publication will remain unchanged until the
stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data related to
the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

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SIST IEC 60840:2018
– 8 – 60840 © IEC:2011
INTRODUCTION
The first edition of IEC 60840, published in 1988, dealt only with cables. Accessories were
added to the second edition, published in February 1999, which separately covered test
methods and test requirements for
a) cables alone,
b) cables together with accessories (a cable system).
Some countries then suggested that a better discrimination be made between systems, cables
and accessories, particularly for the lower voltages of the scope, e.g. 45 kV. This was taken
into account in the third edition and is retained in this revision, which gives the type approval
requirements and the range of approvals for
a) cable systems,
b) cables alone,
c) accessories alone.
Manufacturers and users may choose the most appropriate option for type approval.
At its meeting in November 2004, TC 20 decided to prepare a further major revision of
IEC 60840 and concluded that this edition should incorporate the recommendations for testing
HV and EHV extruded cables that were under preparation by CIGRE study committee B1 WG
B1.06. This work was made available as CIGRE technical brochure No. 303, before the
meeting of TC 20 in October 2006. The brochure, entitled “Revision of qualification procedures
for extruded (extra) high voltage a.c. underground cables”, has therefore been considered by
TC 20, and considerable parts implemented in this standard. Cables with high electrical
stresses at the conductor screen and/or insulation screen are now required to undergo a
prequalification test procedure (simplified compared to that in IEC 62067) as a cable system
inclusive of accessories.
Additionally the following other significant changes to this standard have been introduced:
a) The clause numbering of this standard and IEC 62067 (which has been revised at the
same time as this standard) has been coordinated to achieve as much commonality as
possible to assist users who use both standards.
b) In the case of the sample test, the lightning impulse voltage test is no longer followed by a
power frequency voltage test.
A list of relevant CIGRE references is given in the bibliography.

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SIST IEC 60840:2018
60840 © IEC:2011 – 9 –
POWER CABLES WITH EXTRUDED INSULATION AND
THEIR ACCESSORIES FOR RATED VOLTAGES ABOVE 30 kV
(U = 36 kV) UP TO 150 kV (U = 170 kV) –
m m
TEST METHODS AND REQUIREMENTS



1 Scope
This International Standard specifies test methods and requirements for power cable systems,
cables alone and accessories alone, for fixed installations and for rated voltages above 30 kV
(U = 36 kV) up to and including 150 kV (U = 170 kV).
m m
The requirements apply to single-core cables and to individually screened three-core cables
and to their accessories for usual conditions of installation and operation, but not to special
cables and their accessories, such as submarine cables, for which modifications to the
standard tests may be necessary or special test conditions may need to be devised.
This standard does not cover transition joints between cables with extruded insulation and
paper insulated cables.
2 Normative references
The following 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.
NOTE The IEC 60811 series is currently undergoing a revision, which will lead to a restructuring of its parts. A
description of this, as well as a cross-reference table b
...