IEC 60840:2020
(Main)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
Power cables with extruded insulation and their accessories for rated voltages above 30 kV (U<sub>m</sub>= 36 kV) up to 150 kV (U<sub>m</sub> = 170 kV) - Test methods and requirements
IEC 60840:2020 is available as IEC 60840:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 60840:2020 specifies test methods and requirements for power cable systems, cables alone and accessories alone, for fixed installations and for rated voltages above 30 kV (Um = 36 kV) up to and including 150 kV (Um = 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, such as submarine cables and their accessories, for which modifications to the standard tests or the setup of special test conditions can be necessary. This document does not cover transition joints between cables with extruded insulation and paper insulated cables. This fifth edition cancels and replaces the fourth edition, published in 2011. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- Gas immersed cable terminations for use at rated voltages above 52 kV are required to be designed, type and routine tested in accordance with IEC 62271-209 in addition to the routine and type tests specified in this document.
- Requirements are introduced for composite outdoor termination insulators.
- The test cylinder diameters specified for the bending test (type and prequalification tests) have been modified in line with IEC TR 61901:2016.
- A low smoke halogen free oversheath material, designated ST12 is introduced.
- Additional tests under fire conditions are introduced: vertical flame spread, smoke density, acidity and conductivity, which shall be applied according to the fire performance declared for the cable.
- A test for water penetration in the conductor is added.
- In addition to tests on the outer protection of joints, type tests on the screen sectionalizing insulation of all accessories have been introduced.
The contents of the corrigendum of February 2021 have been included in this copy.
Câbles d'énergie à isolation extrudée et leurs accessoires pour des tensions assignées supérieures à 30 kV (U<sub>m</sub> = 36 kV) et jusqu'à 150 kV (U<sub>m</sub> = 170 kV) - Méthodes et exigences d'essai
IEC 60840:2020 est disponible sous forme de IEC 60840:2020 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.
L'IEC 60840:2020 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 (Um = 36 kV) et jusqu'à 150 kV (Um = 170 kV) inclus. Les exigences s'appliquent aux câbles unipolaires, aux câbles tripolaires à écran individuel et à leurs accessoires, pour des conditions habituelles d'installation et de fonctionnement, mais pas aux câbles spéciaux, tels que les câbles sous-marins et leurs accessoires, 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 le présent document. Cette cinquième édition annule et remplace la quatrième édition parue en 2011. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- il est exigé que les extrémités de câble immergées dans du gaz pour une utilisation à des tensions assignées supérieures à 52 kV soient soumises à des essais de type et des essais individuels de série conformément à l'IEC 62271-209 en plus des essais individuels de série et des essais de type spécifiés dans le présent document;
- les exigences relatives aux isolateurs composites pour extrémités de câble extérieures ont été introduites;
- les diamètres des cylindres d'essai spécifiés pour l'essai d'enroulement (essais de type et de préqualification) ont été modifiés conformément à l'IEC TR 61901:2016;
- un matériau de gaine extérieure sans halogène à faible dégagement de fumée, appelé ST12 a été introduit;
- les essais supplémentaires des câbles soumis au feu (propagation verticale de flammes, densité de fumées, acidité et conductivité) qui doivent être appliqués conformément aux performances de résistance au feu déclarées pour le câble ont été introduits;
- un essai de pénétration d'eau dans l'âme a été ajouté;
- en plus des essais des protections externes des jonctions, les essais de type de l'arrêt d'écran ont été étendus à tous les accessoires.
Le contenu du corrigendum de février 2021 a été pris en considération dans cet exemplaire.
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IEC 60840 ®
Edition 5.0 2020-05
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
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
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
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About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.
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IEC 60840 ®
Edition 5.0 2020-05
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
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
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.060.20 ISBN 978-2-8322-8381-3
– 2 – IEC 60840:2020 RLV © IEC 2020
CONTENTS
FOREWORD . 8
INTRODUCTION . 10
1 Scope . 12
2 Normative references . 12
3 Terms and definitions . 15
3.1 Definitions of dimensional values (thicknesses, cross-sections, etc.) . 15
3.2 Definitions concerning tests . 15
3.3 Other definitions . 16
4 Voltage designations, materials and rounding of numbers . 17
4.1 Rated voltages . 17
4.2 Cable insulating materials compounds . 17
4.3 Cable metal screens/sheaths . 17
4.4 Cable oversheathing materials compounds . 18
4.5 Rounding of numbers . 18
5 Precautions against water penetration in cables . 18
6 Cable characteristics . 19
7 Accessories characteristics . 20
7.1 Gas immersed cable terminations . 20
7.2 Composite insulators for outdoor cable terminations . 20
7.3 Accessory characteristics to be declared . 20
8 Test conditions . 21
8.1 Ambient temperature. 21
8.2 Frequency and waveform of power frequency test voltages .
8.2 High voltage tests . 21
8.3 Waveform of lightning impulse test voltages . 21
8.4 Relationship of test voltages to rated voltages . 21
8.5 Determination of the cable conductor temperature . 22
9 Routine tests on cables and on the main insulation of prefabricated accessories . 22
9.1 General . 22
9.2 Partial discharge test . 22
9.3 Voltage test . 23
9.4 Electrical test on oversheath of the cable . 23
10 Sample tests on cables . 23
10.1 General . 23
10.2 Frequency of tests . 23
10.3 Repetition of tests . 23
10.4 Conductor examination . 24
10.5 Measurement of electrical resistance of conductor and metal screen . 24
10.6 Measurement of thickness of cable insulation and oversheath . 24
10.6.1 General . 24
10.6.2 Requirements for the insulation . 25
10.6.3 Requirements for the cable oversheath . 25
10.7 Measurement of thickness of metal sheath . 25
10.7.1 General . 25
10.7.2 Lead or lead alloy sheath . 26
10.7.3 Plain or corrugated Copper or aluminium sheath . 26
10.7.4 Metal tape for CD design . 27
10.8 Measurement of diameters . 27
10.9 Hot set test for XLPE, EPR and HEPR insulations. 27
10.9.1 Procedure . 27
10.9.2 Requirements . 27
10.10 Measurement of capacitance . 27
10.11 Measurement of density of HDPE insulation . 27
10.11.1 Procedure . 27
10.11.2 Requirements . 27
10.12 Lightning impulse voltage test . 27
10.13 Water penetration test . 28
10.14 Additional tests on components of cables with a longitudinally applied metal
tape or foil, bonded to the oversheath . 28
11 Sample tests on accessories . 28
11.1 Tests on components of accessory . 28
11.2 Tests on complete accessory . 28
12 Type tests on cable systems . 29
12.1 General . 29
12.2 Range of type approval . 29
12.3 Summary of type tests . 31
12.4 Electrical type tests on complete cable systems . 31
12.4.1 Test voltage values . 31
12.4.2 Tests and sequence of tests . 32
12.4.3 Bending test . 32
12.4.4 Partial discharge tests . 33
12.4.5 Tan δ measurement . 34
12.4.6 Heating cycle voltage test . 34
12.4.7 Lightning impulse voltage test followed by a power frequency voltage
test . 35
12.4.8 Examination . 35
12.4.9 Resistivity of semi-conducting screens . 35
12.5 Non-electrical type tests on cable components and on complete cable . 36
12.5.1 General . 36
12.5.2 Check of cable construction . 36
12.5.3 Tests for determining the mechanical properties of insulation before and
after ageing . 36
12.5.4 Tests for determining the mechanical properties of oversheaths before
and after ageing . 37
12.5.5 Ageing tests on pieces of complete cable to check compatibility of
materials . 37
12.5.6 Loss of mass test on PVC oversheaths of type ST . 38
12.5.7 Pressure test at high temperature on oversheaths . 38
12.5.8 Test on PVC oversheaths (ST ST ) and LSHF oversheaths (ST ) at
1, 2 12
low temperature . 39
12.5.9 Heat shock test for PVC oversheaths (ST and ST ) . 39
1 2
12.5.10 Ozone resistance test for EPR and HEPR insulations . 39
12.5.11 Hot set test for EPR, HEPR and XLPE insulations . 39
12.5.12 Measurement of density of HDPE insulation . 40
– 4 – IEC 60840:2020 RLV © IEC 2020
12.5.13 Measurement of carbon black content of black PE oversheaths (ST
and ST ) . 40
12.5.14 Test under fire conditions . 40
12.5.15 Water penetration test . 41
12.5.16 Tests
...
IEC 60840 ®
Edition 5.1 2023-06
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
colour
inside
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
IEC 60840: 2020-05+AMD1:2023-06 CSV(en)
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
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copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.
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3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
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latest edition, a corrigendum or an amendment might have been published.
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further assistance, please contact the Customer Service
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IEC 60840 ®
Edition 5.1 2023-06
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
colour
inside
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
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.060.20 ISBN 978-2-8322-7126-1
IEC 60840 ®
Edition 5.1 2023-06
CONSOLIDATED VERSION
REDLINE VERSION
colour
inside
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
IEC 60840: 2020-05+AMD1:2023-06 CSV(en)
– 2 – IEC 60840:2020+AMD1:2023 CSV
© IEC 2023
CONTENTS
FOREWORD . 8
INTRODUCTION . 10
1 Scope . 11
2 Normative references . 11
3 Terms and definitions . 13
3.1 Definitions of dimensional values (thicknesses, cross-sections, etc.) . 13
3.2 Definitions concerning tests . 14
3.3 Other definitions . 14
4 Voltage designations, materials and rounding of numbers . 16
4.1 Rated voltages . 16
4.2 Cable insulating compounds . 16
4.3 Cable metal screens/sheaths . 16
4.4 Cable oversheathing compounds . 16
4.5 Rounding of numbers . 17
5 Precautions against water penetration in cables . 17
6 Cable characteristics . 17
7 Accessories characteristics . 18
7.1 Gas immersed cable terminations . 18
7.2 Composite Insulators for outdoor cable terminations . 18
7.3 Accessory characteristics to be declared . 19
8 Test conditions . 20
8.1 Ambient temperature. 20
8.2 High voltage tests . 20
8.3 Waveform of lightning impulse test voltages . 20
8.4 Relationship of test voltages to rated voltages . 20
8.5 Determination of the cable conductor temperature . 20
8.6 Tests on gas immersed terminations . 20
9 Routine tests on cables and accessories . 21
9.1 General . 21
9.2 Partial discharge test . 21
9.3 Voltage test . 21
9.4 Electrical test on oversheath of the cable . 22
10 Sample tests on cables . 22
10.1 General . 22
10.2 Frequency of tests . 22
10.3 Repetition of tests . 22
10.4 Conductor examination . 23
10.5 Measurement of electrical resistance of conductor and metal screen . 23
10.6 Measurement of thickness of cable insulation and oversheath . 23
10.6.1 General . 23
10.6.2 Requirements for the insulation . 23
10.6.3 Requirements for the cable oversheath . 24
10.7 Measurement of thickness of metal sheath . 24
10.7.1 General . 24
10.7.2 Lead or lead alloy sheath . 24
10.7.3 Copper or aluminium sheath . 25
© IEC 2023
10.7.4 Metal tape for CD design . 25
10.8 Measurement of diameters . 25
10.9 Hot set test for XLPE, EPR and HEPR insulations. 26
10.9.1 Procedure . 26
10.9.2 Requirements . 26
10.10 Measurement of capacitance . 26
10.11 Measurement of density of HDPE insulation . 26
10.11.1 Procedure . 26
10.11.2 Requirements . 26
10.12 Lightning impulse voltage test . 26
10.13 Water penetration test . 27
10.14 Additional Tests on components of cables with a longitudinally applied metal
tape or foil, bonded to the oversheath . 27
11 Sample tests on accessories . 27
11.1 Tests on components of accessory . 27
11.2 Tests on complete accessory . 27
12 Type tests on cable systems . 27
12.1 General . 27
12.2 Range of type approval . 28
12.3 Summary of type tests . 29
12.4 Electrical type tests on cable systems . 30
12.4.1 Test voltage values . 30
12.4.2 Tests and sequence of tests . 30
12.4.3 Bending test . 30
12.4.4 Partial discharge tests . 31
12.4.5 Tan δ measurement . 31
12.4.6 Heating cycle voltage test . 32
12.4.7 Lightning impulse voltage test followed by a power frequency voltage
test . 32
12.4.8 Examination . 33
12.4.9 Resistivity of semi-conducting screens . 33
12.5 Non-electrical type tests on cable components and on complete cable . 34
12.5.1 General . 34
12.5.2 Check of cable construction . 34
12.5.3 Tests for determining the mechanical properties of insulation before and
after ageing . 34
12.5.4 Tests for determining the mechanical properties of oversheaths before
and after ageing . 35
12.5.5 Ageing tests on pieces of complete cable to check compatibility of
materials . 35
12.5.6 Loss of mass test on PVC oversheaths of type ST . 36
12.5.7 Pressure test at high temperature on oversheaths . 36
12.5.8 Test on for PVC oversheaths (ST , ST ) and LSHF oversheaths (ST )
1 2 12
at low temperature . 36
12.5.9 Heat shock test for PVC oversheaths (ST and ST ) . 37
1 2
12.5.10 Ozone resistance test for EPR and HEPR insulations . 37
12.5.11 Hot set test for EPR, HEPR and XLPE insulations . 37
12.5.12 Measurement of density of HDPE insulation . 37
– 4 – IEC 60840:2020+AMD1:2023 CSV
© IEC 2023
12.5.13 Measurement of carbon black content of for black PE oversheaths (ST
and ST ) .
...
IEC 60840 ®
Edition 5.0 2020-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
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
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
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Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.
IEC publications search - webstore.iec.ch/advsearchform Electropedia - www.electropedia.org
The advanced search enables to find IEC publications by a The world's leading online dictionary on electrotechnology,
variety of criteria (reference number, text, technical containing more than 22 000 terminological entries in English
committee,…). It also gives information on projects, replaced and French, with equivalent terms in 16 additional languages.
and withdrawn publications. Also known as the International Electrotechnical Vocabulary
(IEV) online.
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Stay up to date on all new IEC publications. Just Published IEC Glossary - std.iec.ch/glossary
details all new publications released. Available online and 67 000 electrotechnical terminology entries in English and
once a month by email. French extracted from the Terms and Definitions clause of
IEC publications issued since 2002. Some entries have been
IEC Customer Service Centre - webstore.iec.ch/csc collected from earlier publications of IEC TC 37, 77, 86 and
If you wish to give us your feedback on this publication or CISPR.
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IEC 60840 ®
Edition 5.0 2020-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
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
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.060.20 ISBN 978-2-8322-8302-8
– 2 – IEC 60840:2020 © IEC 2020
CONTENTS
FOREWORD . 8
INTRODUCTION . 10
1 Scope . 11
2 Normative references . 11
3 Terms and definitions . 13
3.1 Definitions of dimensional values (thicknesses, cross-sections, etc.) . 13
3.2 Definitions concerning tests . 13
3.3 Other definitions . 14
4 Voltage designations, materials and rounding of numbers . 15
4.1 Rated voltages . 15
4.2 Cable insulating compounds . 15
4.3 Cable metal screens/sheaths . 15
4.4 Cable oversheathing compounds . 16
4.5 Rounding of numbers . 16
5 Precautions against water penetration in cables . 16
6 Cable characteristics . 17
7 Accessories characteristics . 18
7.1 Gas immersed cable terminations . 18
7.2 Composite insulators for outdoor cable terminations . 18
7.3 Accessory characteristics to be declared . 18
8 Test conditions . 19
8.1 Ambient temperature. 19
8.2 High voltage tests . 19
8.3 Waveform of lightning impulse test voltages . 19
8.4 Relationship of test voltages to rated voltages . 19
8.5 Determination of the cable conductor temperature . 19
9 Routine tests on cables and accessories . 19
9.1 General . 19
9.2 Partial discharge test . 20
9.3 Voltage test . 20
9.4 Electrical test on oversheath of the cable . 21
10 Sample tests on cables . 21
10.1 General . 21
10.2 Frequency of tests . 21
10.3 Repetition of tests . 21
10.4 Conductor examination . 21
10.5 Measurement of electrical resistance of conductor and metal screen . 22
10.6 Measurement of thickness of cable insulation and oversheath . 22
10.6.1 General . 22
10.6.2 Requirements for the insulation . 22
10.6.3 Requirements for the cable oversheath . 23
10.7 Measurement of thickness of metal sheath . 23
10.7.1 General . 23
10.7.2 Lead or lead alloy sheath . 23
10.7.3 Copper or aluminium sheath . 24
10.7.4 Metal tape for CD design . 24
10.8 Measurement of diameters . 24
10.9 Hot set test for XLPE, EPR and HEPR insulations. 24
10.9.1 Procedure . 24
10.9.2 Requirements . 24
10.10 Measurement of capacitance . 25
10.11 Measurement of density of HDPE insulation . 25
10.11.1 Procedure . 25
10.11.2 Requirements . 25
10.12 Lightning impulse voltage test . 25
10.13 Water penetration test . 25
10.14 Additional tests on components of cables with a longitudinally applied metal
tape or foil, bonded to the oversheath . 25
11 Sample tests on accessories . 26
11.1 Tests on components of accessory . 26
11.2 Tests on complete accessory . 26
12 Type tests on cable systems . 26
12.1 General . 26
12.2 Range of type approval . 27
12.3 Summary of type tests . 28
12.4 Electrical type tests on cable systems . 28
12.4.1 Test voltage values . 28
12.4.2 Tests and sequence of tests . 29
12.4.3 Bending test . 29
12.4.4 Partial discharge tests . 30
12.4.5 Tan δ measurement .
...
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