Power cables with extruded insulation and their accessories for rated voltages above 150 kV (<em>U</em><sub>m</sub> = 170 kV) up to 500 kV (<em>U</em><sub>m</sub> = 550 kV) - Test methods and requirements

IEC 62067:2022 is available as IEC 62067:2022 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 62067:2022 specifies test methods and requirements for power cable systems, cables with extruded insulation and their accessories for fixed installations, for rated voltages above 150 kV (Um = 170 kV) up to and including 500 kV (Um = 550 kV). The requirements apply to single-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 can be necessary or special test conditions that may need to be devised. This document does not cover transition joints between cables with extruded insulation and paper insulated cables.

Câbles d'énergie à isolation extrudée et leurs accessoires pour des tensions assignées supérieures à 150 kV (<em>U</em><sub>m</sub> = 170 kV) et jusqu'à 500 kV (<em>U</em><sub>m</sub> = 550 kV) - Méthodes et exigences d'essai

IEC 62067:2022 est disponible sous forme de IEC 62067:2022 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.
L'IEC 62067:2022 spécifie les méthodes et exigences d'essai relatives aux systèmes de câbles d'énergie, aux câbles à isolation extrudée et à leurs accessoires destinés aux installations fixes, pour des tensions assignées supérieures à 150 kV (Um = 170 kV) et jusqu'à 500 kV (Um = 550 kV) compris. Les exigences sont applicables aux câbles unipolaires et à leurs accessoires dans des conditions d'installation et de fonctionnement courantes, mais ne sont pas applicables aux câbles spéciaux et à leurs accessoires, tels que les câbles sous-marins, pour lesquels il peut être nécessaire de modifier les essais normalisés ou d'établir des conditions d'essai particulières. Les jonctions qui assurent le raccordement des câbles à isolant extrudé aux câbles isolés au papier ne sont pas couvertes par le présent document.

General Information

Status
Published
Publication Date
20-Apr-2022
Technical Committee
Current Stage
PPUB - Publication issued
Completion Date
21-Apr-2022
Ref Project

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IEC 62067:2022 - Power cables with extruded insulation and their accessories for rated voltages above 150 kV (<em>U</em><sub>m</sub> = 170 kV) up to 500 kV (<em>U</em><sub>m</sub> = 550 kV) - Test methods and requirements
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IEC 62067
Edition 3.0 2022-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Power cables with extruded insulation and their accessories for rated voltages
above 150 kV (Um = 170 kV) up to 500 kV (Um = 550 kV) – Test methods and
requirements
Câbles d'énergie à isolation extrudée et leurs accessoires pour des tensions
assignées supérieures à 150 kV (Um = 170 kV) et jusqu'à 500 kV (Um = 550 kV) –
Méthodes et exigences d'essai
IEC 62067:2022-04(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 62067
Edition 3.0 2022-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Power cables with extruded insulation and their accessories for rated voltages
above 150 kV (Um = 170 kV) up to 500 kV (Um = 550 kV) – Test methods and
requirements
Câbles d'énergie à isolation extrudée et leurs accessoires pour des tensions
assignées supérieures à 150 kV (Um = 170 kV) et jusqu'à 500 kV (Um = 550 kV) –
Méthodes et exigences d'essai
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.060.20 ISBN 978-2-8322-1092-8

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

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 62067:2022 © IEC 2022
CONTENTS

FOREWORD ........................................................................................................................... 7

INTRODUCTION ..................................................................................................................... 9

1 Scope ............................................................................................................................ 10

2 Normative references .................................................................................................... 10

3 Terms and definitions .................................................................................................... 12

3.1 Definitions of dimensional values (thicknesses, cross-sections, etc.) .................... 12

3.2 Definitions relating to tests .................................................................................... 12

3.3 Other definitions ................................................................................................... 13

4 Voltage designations, materials and rounding of numbers ............................................. 14

4.1 Rated voltages ...................................................................................................... 14

4.2 Cable insulating compounds ................................................................................. 14

4.3 Cable metal screens/sheaths ................................................................................ 15

4.4 Cable oversheathing compounds .......................................................................... 15

4.5 Rounding of numbers ............................................................................................ 16

5 Precautions against water penetration in cables ............................................................ 16

6 Cable characteristics ..................................................................................................... 16

7 Accessories characteristics ........................................................................................... 17

7.1 Gas immersed cable terminations ......................................................................... 17

7.2 Insulators for outdoor cable terminations .............................................................. 17

7.3 Accessory characteristics to be declared .............................................................. 17

8 Test conditions .............................................................................................................. 18

8.1 Ambient temperature............................................................................................. 18

8.2 High voltage tests ................................................................................................. 18

8.3 Waveform of impulse test voltages ........................................................................ 18

8.4 Relationship of test voltages to rated voltages ...................................................... 18

8.5 Determination of the cable conductor temperature ................................................ 19

8.6 Tests on gas immersed terminations ..................................................................... 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 .............................................................. 20

10 Sample tests on cables .................................................................................................. 20

10.1 General ................................................................................................................. 20

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 of metal

screen/sheath ....................................................................................................... 21

10.6 Measurement of thickness of insulation and oversheath ........................................ 21

10.6.1 General ......................................................................................................... 21

10.6.2 Requirements for the insulation ..................................................................... 22

10.6.3 Requirements for the cable oversheath .......................................................... 22

10.7 Measurement of thickness of metal sheath ............................................................ 22

10.7.1 General ......................................................................................................... 22

10.7.2 Lead or lead alloy sheath ............................................................................... 23

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IEC 62067:2022 © IEC 2022 – 3 –

10.7.3 Copper or aluminium sheath .......................................................................... 23

10.7.4 Metal tape for CD design ............................................................................... 24

10.8 Measurement of diameters .................................................................................... 24

10.9 Hot set test for XLPE and EPR insulations ............................................................ 24

10.9.1 Procedure ...................................................................................................... 24

10.9.2 Requirements ................................................................................................ 24

10.10 Measurement of capacitance ................................................................................ 24

10.11 Measurement of density of HDPE insulation .......................................................... 24

10.11.1 Procedure ...................................................................................................... 24

10.11.2 Requirements ................................................................................................ 24

10.12 Lightning impulse voltage test ............................................................................... 24

10.13 Water penetration test ........................................................................................... 25

10.14 Tests on components of cables with a longitudinally applied metal tape or

foil bonded to the oversheath ................................................................................ 25

11 Sample tests on accessories ......................................................................................... 25

11.1 Tests on components of accessory ....................................................................... 25

11.2 Tests on complete accessory ................................................................................ 25

12 Type tests on cable systems .......................................................................................... 26

12.1 General ................................................................................................................. 26

12.2 Range of type approval ......................................................................................... 26

12.3 Summary of type tests .......................................................................................... 27

12.4 Electrical type tests on complete cable systems .................................................... 28

12.4.1 Test voltage values ........................................................................................ 28

12.4.2 Tests and sequence of tests .......................................................................... 28

12.4.3 Bending test .................................................................................................. 29

12.4.4 Partial discharge tests ................................................................................... 29

12.4.5 Tan δ measurement ....................................................................................... 30

12.4.6 Heating cycle voltage test .............................................................................. 30

12.4.7 Impulse voltage tests ..................................................................................... 31

12.4.8 Examination ................................................................................................... 32

12.4.9 Resistivity of semi-conducting screens .......................................................... 32

12.5 Non-electrical type tests on cable and on cable components ................................. 32

12.5.1 General ......................................................................................................... 32

12.5.2 Check of cable construction ........................................................................... 33

12.5.3 Tests for determining the mechanical properties of insulation before and

after ageing ................................................................................................... 33

12.5.4 Tests for determining the mechanical properties of oversheaths before

and after ageing ............................................................................................ 33

12.5.5 Ageing tests for pieces of cable to check compatibility of materials ................ 34

12.5.6 Loss of mass test on PVC oversheaths of type ST ....................................... 34

12.5.7 Pressure test at high temperature on oversheaths ......................................... 35

12.5.8 Test for PVC oversheaths (ST and ST ) and LSHF oversheaths
1 2

(ST ) at low temperature ............................................................................. 35

12.5.9 Heat shock test for PVC oversheaths (ST and ST ) ..................................... 35

1 2

12.5.10 Ozone resistance test for EPR insulation ....................................................... 35

12.5.11 Hot set test for EPR and XLPE insulations ..................................................... 35

12.5.12 Measurement of density for HDPE insulation ................................................. 36

---------------------- Page: 5 ----------------------
– 4 – IEC 62067:2022 © IEC 2022
12.5.13 Measurement of carbon black content for black PE oversheaths (ST

and ST ) ....................................................................................................... 36

12.5.14 Test under fire conditions .............................................................................. 36

12.5.15 Water penetration test ................................................................................... 38

12.5.16 Tests for components of cables with a longitudinally applied metal tape

or foil, bonded to the oversheath ................................................................... 38

13 Prequalification test of the cable system ........................................................................ 38

13.1 General and range of prequalification test approval .............................................. 38

13.2 Prequalification test on complete cable system ..................................................... 39

13.2.1 Summary of prequalification tests .................................................................. 39

13.2.2 Test voltage values ........................................................................................ 39

13.2.3 Test arrangement .......................................................................................... 40

13.2.4 Heating cycle voltage test .............................................................................. 40

13.2.5 Lightning impulse voltage test ........................................................................ 41

13.2.6 Examination ................................................................................................... 41

13.3 Tests for the extension of the prequalification of a cable system ........................... 41

13.3.1 Summary of the extension of prequalification test .......................................... 41

13.3.2 Electrical part of the extension of prequalification tests on complete

cable system ................................................................................................. 41

14 Type test on cables ....................................................................................................... 43

15 Type test on accessories ............................................................................................... 43

16 Electrical test after installation (on-site tests) ................................................................ 43

16.1 General ................................................................................................................. 43

16.2 DC voltage test of the oversheath ......................................................................... 43

16.3 Tests using AC voltage ......................................................................................... 44

16.3.1 AC voltage test of the insulation .................................................................... 44

16.3.2 Partial discharge test ..................................................................................... 44

Annex A (informative) Determination of the cable conductor temperature ............................. 52

A.1 Purpose ................................................................................................................ 52

A.2 Calibration of the temperature of the main test loop .............................................. 52

A.2.1 General ......................................................................................................... 52

A.2.2 Installation of cable and temperature sensors ................................................ 52

A.2.3 Calibration method ........................................................................................ 54

A.3 Heating for the test ............................................................................................... 54

A.3.1 Method 1 – Test using a reference cable ....................................................... 54

A.3.2 Method 2 – Test using conductor temperature calculations and

measurement of the surface temperature ....................................................... 55

Annex B (normative) Rounding of numbers .......................................................................... 56

Annex C (informative) List of type, prequalification and extension of prequalification

tests for cable systems ......................................................................................................... 57

Annex D (normative) Measurement method for resistivity of semi-conducting screens ......... 59

Annex E (normative) Water penetration test ......................................................................... 62

E.1 Test piece ............................................................................................................. 62

E.2 Test ...................................................................................................................... 62

E.3 Requirements ....................................................................................................... 63

Annex F (normative) Test for water penetration in the conductor .......................................... 64

F.1 Test piece ............................................................................................................. 64

F.2 Test ...................................................................................................................... 64

---------------------- Page: 6 ----------------------
IEC 62067:2022 © IEC 2022 – 5 –

F.3 Requirements ....................................................................................................... 64

Annex G (normative) Tests on components of cables with a longitudinally applied

metal tape or foil, bonded to the oversheath ......................................................................... 66

G.1 Visual examination ................................................................................................ 66

G.2 Adhesion and peel strength................................................................................... 66

G.2.1 General ......................................................................................................... 66

G.2.2 Test: Adhesion strength ................................................................................. 66

G.2.3 Test: Peel strength of overlapped metal foil ................................................... 67

G.2.4 Requirements ................................................................................................ 68

Annex H (normative) Additional tests for accessories ........................................................... 70

H.1 General ................................................................................................................. 70

H.2 Range of approval................................................................................................. 71

H.2.1 Range of approval for joints without screen or metal sheath interruption ........ 71

H.2.2 Range of approval for joints with screen or metal sheath interruption ............. 72

H.2.3 Range of approval for accessories for cable screen interruption and/or

earth connection ............................................................................................ 72

H.2.4 Range of approval for terminations with an insulated screen .......................... 72

H.3 Tests of joints with or without screen or metal sheath interruption and

accessories for cable screen interruption and/or earth connection ........................ 72

H.3.1 Conditioning of sample for test ...................................................................... 72

H.3.2 Water immersion test ..................................................................................... 72

H.3.3 Electrical tests ............................................................................................... 73

H.3.4 Examination ................................................................................................... 74

H.4 Tests of terminations with an insulated screen ...................................................... 75

H.4.1 Conditioning of sample for test ...................................................................... 75

H.4.2 DC voltage withstand test between screen and earth ..................................... 75

H.4.3 Lightning impulse voltage withstand test between screen and earth ............... 75

H.4.4 Examination ................................................................................................... 75

H.5 Tests for insulators for outdoor terminations ......................................................... 75

H.5.1 Tests for ceramic insulators ........................................................................... 75

H.5.2 Tests for composite insulators ....................................................................... 76

H.6 Tests for gas-immersed terminations in case of changing insulating gas ............... 76

H.6.1 General ......................................................................................................... 76

H.6.2 Electrical tests ............................................................................................... 76

H.6.3 Leak rate test ................................................................................................ 77

Annex I (informative) Guidance on examination of cable and accessories ............................ 78

Annex J (informative) Guidance for type test on heating-cycle-voltage-test interruption

and cycle validity .................................................................................................................. 79

J.1 Interruption of cycles during a heating cycle voltage test....................................... 79

J.1.1 Scheduled interruption of test ........................................................................ 79

J.1.2 Non-scheduled interruption of test ................................................................. 79

J.2 Valid heating cycles .............................................................................................. 79

Annex K (normative) Methods for determining the weighted value of halogen content

of the non-metallic materials in the cable .............................................................................. 80

K.1 Calculating the weighted value for the cable when the halogen content of

individual non-metallic material is tested ............................................................... 80

K.2 Preparation of the test sample for measurement of halogen content on a

sample representative of the non-metallic materials in the cable ........................... 80

Bibliography .......................................................................................................................... 81

---------------------- Page: 7 ----------------------
– 6 – IEC 62067:2022 © IEC 2022

Figure 1 – Example of EQ test arrangement for the prequalification of a system with

another joint, designed for rigid as well as for flexible installation ......................................... 42

Figure A.1 – Schematic diagram of test set-up for the reference loop and the main test loop ... 53

Figure A.2 – Example of an arrangement of the temperature sensors on the conductor

of the reference loop ............................................................................................................. 54

Figure D.1 – Dimensions for preparation of samples for measurement of resistivity of

conductor screen .................................................................................................................. 60

Figure D.2 – Dimensions for preparation of samples for measurement of resistivity of

insulation screen ................................................................................................................... 61

Figure E.1 – Schematic diagram of apparatus for water penetration test ............................... 63

Figure F.1 – Schematic diagram of apparatus for water penetration test in the

conductor .............................................................................................................................. 65

Figure G.1 – Adhesion of metal tape or foil ........................................................................... 67

Figure G.2 – Example of overlapped metal foil ...................................................................... 68

Figure G.3 – Peel strength of overlapped metal foil ........
...

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