AS/NZS IEC 60840:2020
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
Standard identically adopts IEC 60840:2020, which 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). Requirements apply to single-core cables and to individually screened three-core cables and their accessories for usual conditions of installation and operation.
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AS/NZS IEC 60840:2020 Power cables with extruded insulation and their accessories for rated voltages above 30 kV (Umﾠ=ﾠ36 kV) up to 150 kV (Umﾠ=ﾠ170 kV) - Test methods and requirements
CONTENTS
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
3.1 Definitions of dimensional values (thicknesses, cross-sections, etc.)
3.2 Definitions concerning tests
3.3 Other definitions
4 Voltage designations, materials and rounding of numbers
4.1 Rated voltages
4.2 Cable insulating compounds
4.3 Cable metal screens/sheaths
4.4 Cable oversheathing compounds
4.5 Rounding of numbers
5 Precautions against water penetration in cables
6 Cable characteristics
7 Accessories characteristics
7.1 Gas immersed cable terminations
7.2 Composite insulators for outdoor cable terminations
7.3 Accessory characteristics to be declared
8 Test conditions
8.1 Ambient temperature
8.2 High voltage tests
8.3 Waveform of lightning impulse test voltages
8.4 Relationship of test voltages to rated voltages
8.5 Determination of the cable conductor temperature
9 Routine tests on cables and accessories
9.1 General
9.2 Partial discharge test
9.3 Voltage test
9.4 Electrical test on oversheath of the cable
10 Sample tests on cables
10.1 General
10.2 Frequency of tests
10.3 Repetition of tests
10.4 Conductor examination
10.5 Measurement of electrical resistance of conductor and metal screen
10.6 Measurement of thickness of cable insulation and oversheath
10.6.1 General
10.6.2 Requirements for the insulation
10.6.3 Requirements for the cable oversheath
10.7 Measurement of thickness of metal sheath
10.7.1 General
10.7.2 Lead or lead alloy sheath
10.7.3 Copper or aluminium sheath
10.7.4 Metal tape for CD design
10.8 Measurement of diameters
10.9 Hot set test for XLPE, EPR and HEPR insulations
10.9.1 Procedure
10.9.2 Requirements
10.10 Measurement of capacitance
10.11 Measurement of density of HDPE insulation
10.11.1 Procedure
10.11.2 Requirements
10.12 Lightning impulse voltage test
10.13 Water penetration test
10.14 Additional tests on components of cables with a longitudinally applied metal tape or foil, bonded to the oversheath
11 Sample tests on accessories
11.1 Tests on components of accessory
11.2 Tests on complete accessory
12 Type tests on cable systems
12.1 General
12.2 Range of type approval
12.3 Summary of type tests
12.4 Electrical type tests on cable systems
12.4.1 Test voltage values
12.4.2 Tests and sequence of tests
12.4.3 Bending test
12.4.4 Partial discharge tests
12.4.5 Tan δ measurement
12.4.6 Heating cycle voltage test
12.4.7 Lightning impulse voltage test followed by a power frequency voltage test
12.4.8 Examination
12.4.9 Resistivity of semi-conducting screens
12.5 Non-electrical type tests on cable components and on complete cable
12.5.1 General
12.5.2 Check of cable construction
12.5.3 Tests for determining the mechanical properties of insulation before and after ageing
12.5.4 Tests for determining the mechanical properties of oversheaths before and after ageing
12.5.5 Ageing tests on pieces of complete cable to check compatibility of materials
12.5.6 Loss of mass test on PVC oversheaths of type ST2
12.5.7 Pressure test at high temperature on oversheaths
12.5.8 Test on PVC oversheaths (ST1, ST2) and LSHF oversheaths (ST12) at low temperature
12.5.9 Heat shock test for PVC oversheaths (ST1 and ST2)
12.5.10 Ozone resistance test for EPR and HEPR insulations
12.5.11 Hot set test for EPR, HEPR and XLPE insulations
12.5.12 Measurement of density of HDPE insulation
12.5.13 Measurement of carbon black content of black PE oversheaths (ST3 and ST7)
12.5.14 Test under fire conditions
12.5.15 Water penetration test
12.5.16 Tests on components of cables with a longitudinally applied metal tape or foil, bonded to the oversheath
12.5.17 Shrinkage test for PE, HDPE and XLPE insulations
12.5.18 Shrinkage test for PE oversheaths (ST3, ST7) and LSHF oversheaths (ST12)
12.5.19 Determination of hardness of HEPR insulation
12.5.20 Determination of the elastic modulus of HEPR insulation
13 Prequalification test of the cable system
13.1 General and range of prequalification test approval
13.2 Prequalification test on complete system
13.2.1 Summary of prequalification tests
13.2.2 Test voltage values
13.2.3 Test arrangement
13.2.4 Heating cycle voltage test
13.2.5 Lightning impulse voltage test
13.2.6 Examination
13.3 Tests for the extension of the prequalification of a cable system
13.3.1 Summary of the extension of prequalification test
13.3.2 Electrical part of the extension of prequalification tests on complete cable system
14 Type tests on cables
14.1 General
14.2 Range of type approval
14.3 Summary of type tests
14.4 Electrical type tests on completed cables
15 Type tests on accessories
15.1 General
15.2 Range of type approval
15.3 Summary of type tests
15.4 Electrical type tests on accessories
15.4.1 Test voltage values
15.4.2 Tests and sequence of tests
16 Electrical tests after installation
16.1 General
16.2 DC voltage test of the oversheath
16.3 AC voltage test of the insulation
Annexes
Annex A (informative) Determination of the cable conductor temperature
A.1 Purpose
A.2 Calibration of the temperature of the main test loop
A.3 Heating for the test
Annex B (normative) Rounding of numbers
Annex C (informative) List of type, prequalification and extension of prequalification tests for cable systems, cables and accessories
Annex D (normative) Method of measuring resistivity of semi-conducting screens
Annex E (normative) Water penetration test
E.1 Test piece
E.2 Test
E.3 Requirements
Annex F (normative) Test for water penetration in the conductor
F.1 Test piece
F.2 Test
F.3 Requirements
Annex G (normative) Tests on components of cables with a longitudinally applied metal tape or foil, bonded to the oversheath
G.1 Visual examination
G.2 Adhesion and peel strength
Annex H (normative) Additional tests for accessories
H.1 General
H.2 Range of approval
H.3 Tests of joints with or without screen or metal sheath interruption and accessories for cable screen interruption and/or earth connection
H.4 Tests of terminations with sheath sectionalizing insulation
H.5 Examination
H.6 Tests for composite insulators for outdoor terminations
Annex I (normative) Determination of hardness of HEPR insulations
I.1 Test piece
I.2 Test procedure
Annex J (informative) Guidance on examination of cable and accessories
Annex K (normative) Methods of determining the weighted value ofthe cable for measurement of halogen content
K.1 Calculating the weighted value of the cable when the halogen content of individual materials is tested
K.2 Preparation of the test sample for measurement of halogen content on a sample representative of the cable construction
Bibliography
Figures
Figure 1 – Example of the test arrangement for the prequalification test
Figure 2 – Example of extension of prequalification test arrangement for the prequalification of a system with another joint, designed for rigid as well as flexible installation
Figure A.1 – Typical test set-up for the reference loop and the main test loop
Figure A.2 – Example of an arrangement of the temperature sensorson the conductor of the reference loop
Figure D.1 – Preparation of samples for measurement of resistivityof conductor and insulation screens
Figure E.1 – Schematic diagram of apparatus for water penetration test
Figure F.1 – Schematic diagram of apparatus for water penetration test in the conductor
Figure G.1 – Adhesion of metal tape or foil
Figure G.2 – Example of overlapped metal foil
Figure G.3 – Peel strength of overlapped metal foil
Figure G.4 – Typical strength versus grip spacing curve (1)
Figure G.5 – Typical strength versus grip spacing curve (2)
Figure I.1 – Test on surfaces of large radius of curvature
Figure I.2 – Test on surfaces of small radius of curvature
Tables
Table 1 – Insulating compounds for cables
Table 2 – Oversheathing compounds for cables
Table 3 – Tan δ requirements for insulating compounds for cables
Table 4 – Test voltages
Table 5 – Non-electrical type tests for insulating and oversheathing compounds for cables
Table 6 – Test requirements for mechanical characteristics of insulating compounds for cables (before and after ageing)
Table 7 – Test requirements for mechanical characteristics of oversheathing compounds for cables (before and after ageing)
Table 8 – Test requirements for particular characteristics ofinsulating compounds for cables
Table 9 – Test requirements for particular characteristics of PVC and LSHF oversheathing for cables
Table 10 – Maximum mechanical load for composite insulators for outdoor terminations
Table C.1 – Type tests on cable systems, on cables and on accessories
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
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
Table G.1 – Minimum acceptable adhesion or peel strength forces
Table H.1 – Test sequence
Table H.2 – Lightning impulse voltage withstand test between screen and earth of joints with or without screen or metal sheath interruption and accessories for cable screen interruption and/or earth connection
Table H.3 – Lightning impulse voltage withstand test between screen and screen of joints with screen or metal sheath interruption and accessories for cable screen interruption and/or earth connection
Table H.4 – Lightning impulse voltage withstand tests between screen and earth of terminations with sheath sectionalizing insulation
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AS/NZS IEC 60840:2020 Power cables with extruded insulation and their accessories for rated voltages above 30 kV (Umﾠ=ﾠ36 kV) up to 150 kV (Umﾠ=ﾠ170 kV) - Test methods and requirements
CONTENTS
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
3.1 Definitions of dimensional values (thicknesses, cross-sections, etc.)
3.2 Definitions concerning tests
3.3 Other definitions
4 Voltage designations, materials and rounding of numbers
4.1 Rated voltages
4.2 Cable insulating compounds
4.3 Cable metal screens/sheaths
4.4 Cable oversheathing compounds
4.5 Rounding of numbers
5 Precautions against water penetration in cables
6 Cable characteristics
7 Accessories characteristics
7.1 Gas immersed cable terminations
7.2 Composite insulators for outdoor cable terminations
7.3 Accessory characteristics to be declared
8 Test conditions
8.1 Ambient temperature
8.2 High voltage tests
8.3 Waveform of lightning impulse test voltages
8.4 Relationship of test voltages to rated voltages
8.5 Determination of the cable conductor temperature
9 Routine tests on cables and accessories
9.1 General
9.2 Partial discharge test
9.3 Voltage test
9.4 Electrical test on oversheath of the cable
10 Sample tests on cables
10.1 General
10.2 Frequency of tests
10.3 Repetition of tests
10.4 Conductor examination
10.5 Measurement of electrical resistance of conductor and metal screen
10.6 Measurement of thickness of cable insulation and oversheath
10.6.1 General
10.6.2 Requirements for the insulation
10.6.3 Requirements for the cable oversheath
10.7 Measurement of thickness of metal sheath
10.7.1 General
10.7.2 Lead or lead alloy sheath
10.7.3 Copper or aluminium sheath
10.7.4 Metal tape for CD design
10.8 Measurement of diameters
10.9 Hot set test for XLPE, EPR and HEPR insulations
10.9.1 Procedure
10.9.2 Requirements
10.10 Measurement of capacitance
10.11 Measurement of density of HDPE insulation
10.11.1 Procedure
10.11.2 Requirements
10.12 Lightning impulse voltage test
10.13 Water penetration test
10.14 Additional tests on components of cables with a longitudinally applied metal tape or foil, bonded to the oversheath
11 Sample tests on accessories
11.1 Tests on components of accessory
11.2 Tests on complete accessory
12 Type tests on cable systems
12.1 General
12.2 Range of type approval
12.3 Summary of type tests
12.4 Electrical type tests on cable systems
12.4.1 Test voltage values
12.4.2 Tests and sequence of tests
12.4.3 Bending test
12.4.4 Partial discharge tests
12.4.5 Tan δ measurement
12.4.6 Heating cycle voltage test
12.4.7 Lightning impulse voltage test followed by a power frequency voltage test
12.4.8 Examination
12.4.9 Resistivity of semi-conducting screens
12.5 Non-electrical type tests on cable components and on complete cable
12.5.1 General
12.5.2 Check of cable construction
12.5.3 Tests for determining the mechanical properties of insulation before and after ageing
12.5.4 Tests for determining the mechanical properties of oversheaths before and after ageing
12.5.5 Ageing tests on pieces of complete cable to check compatibility of materials
12.5.6 Loss of mass test on PVC oversheaths of type ST2
12.5.7 Pressure test at high temperature on oversheaths
12.5.8 Test on PVC oversheaths (ST1, ST2) and LSHF oversheaths (ST12) at low temperature
12.5.9 Heat shock test for PVC oversheaths (ST1 and ST2)
12.5.10 Ozone resistance test for EPR and HEPR insulations
12.5.11 Hot set test for EPR, HEPR and XLPE insulations
12.5.12 Measurement of density of HDPE insulation
12.5.13 Measurement of carbon black content of black PE oversheaths (ST3 and ST7)
12.5.14 Test under fire conditions
12.5.15 Water penetration test
12.5.16 Tests on components of cables with a longitudinally applied metal tape or foil, bonded to the oversheath
12.5.17 Shrinkage test for PE, HDPE and XLPE insulations
12.5.18 Shrinkage test for PE oversheaths (ST3, ST7) and LSHF oversheaths (ST12)
12.5.19 Determination of hardness of HEPR insulation
12.5.20 Determination of the elastic modulus of HEPR insulation
13 Prequalification test of the cable system
13.1 General and range of prequalification test approval
13.2 Prequalification test on complete system
13.2.1 Summary of prequalification tests
13.2.2 Test voltage values
13.2.3 Test arrangement
13.2.4 Heating cycle voltage test
13.2.5 Lightning impulse voltage test
13.2.6 Examination
13.3 Tests for the extension of the prequalification of a cable system
13.3.1 Summary of the extension of prequalification test
13.3.2 Electrical part of the extension of prequalification tests on complete cable system
14 Type tests on cables
14.1 General
14.2 Range of type approval
14.3 Summary of type tests
14.4 Electrical type tests on completed cables
15 Type tests on accessories
15.1 General
15.2 Range of type approval
15.3 Summary of type tests
15.4 Electrical type tests on accessories
15.4.1 Test voltage values
15.4.2 Tests and sequence of tests
16 Electrical tests after installation
16.1 General
16.2 DC voltage test of the oversheath
16.3 AC voltage test of the insulation
Annexes
Annex A (informative) Determination of the cable conductor temperature
A.1 Purpose
A.2 Calibration of the temperature of the main test loop
A.3 Heating for the test
Annex B (normative) Rounding of numbers
Annex C (informative) List of type, prequalification and extension of prequalification tests for cable systems, cables and accessories
Annex D (normative) Method of measuring resistivity of semi-conducting screens
Annex E (normative) Water penetration test
E.1 Test piece
E.2 Test
E.3 Requirements
Annex F (normative) Test for water penetration in the conductor
F.1 Test piece
F.2 Test
F.3 Requirements
Annex G (normative) Tests on components of cables with a longitudinally applied metal tape or foil, bonded to the oversheath
G.1 Visual examination
G.2 Adhesion and peel strength
Annex H (normative) Additional tests for accessories
H.1 General
H.2 Range of approval
H.3 Tests of joints with or without screen or metal sheath interruption and accessories for cable screen interruption and/or earth connection
H.4 Tests of terminations with sheath sectionalizing insulation
H.5 Examination
H.6 Tests for composite insulators for outdoor terminations
Annex I (normative) Determination of hardness of HEPR insulations
I.1 Test piece
I.2 Test procedure
Annex J (informative) Guidance on examination of cable and accessories
Annex K (normative) Methods of determining the weighted value ofthe cable for measurement of halogen content
K.1 Calculating the weighted value of the cable when the halogen content of individual materials is tested
K.2 Preparation of the test sample for measurement of halogen content on a sample representative of the cable construction
Bibliography
Figures
Figure 1 – Example of the test arrangement for the prequalification test
Figure 2 – Example of extension of prequalification test arrangement for the prequalification of a system with another joint, designed for rigid as well as flexible installation
Figure A.1 – Typical test set-up for the reference loop and the main test loop
Figure A.2 – Example of an arrangement of the temperature sensorson the conductor of the reference loop
Figure D.1 – Preparation of samples for measurement of resistivityof conductor and insulation screens
Figure E.1 – Schematic diagram of apparatus for water penetration test
Figure F.1 – Schematic diagram of apparatus for water penetration test in the conductor
Figure G.1 – Adhesion of metal tape or foil
Figure G.2 – Example of overlapped metal foil
Figure G.3 – Peel strength of overlapped metal foil
Figure G.4 – Typical strength versus grip spacing curve (1)
Figure G.5 – Typical strength versus grip spacing curve (2)
Figure I.1 – Test on surfaces of large radius of curvature
Figure I.2 – Test on surfaces of small radius of curvature
Tables
Table 1 – Insulating compounds for cables
Table 2 – Oversheathing compounds for cables
Table 3 – Tan δ requirements for insulating compounds for cables
Table 4 – Test voltages
Table 5 – Non-electrical type tests for insulating and oversheathing compounds for cables
Table 6 – Test requirements for mechanical characteristics of insulating compounds for cables (before and after ageing)
Table 7 – Test requirements for mechanical characteristics of oversheathing compounds for cables (before and after ageing)
Table 8 – Test requirements for particular characteristics ofinsulating compounds for cables
Table 9 – Test requirements for particular characteristics of PVC and LSHF oversheathing for cables
Table 10 – Maximum mechanical load for composite insulators for outdoor terminations
Table C.1 – Type tests on cable systems, on cables and on accessories
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
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
Table G.1 – Minimum acceptable adhesion or peel strength forces
Table H.1 – Test sequence
Table H.2 – Lightning impulse voltage withstand test between screen and earth of joints with or without screen or metal sheath interruption and accessories for cable screen interruption and/or earth connection
Table H.3 – Lightning impulse voltage withstand test between screen and screen of joints with screen or metal sheath interruption and accessories for cable screen interruption and/or earth connection
Table H.4 – Lightning impulse voltage withstand tests between screen and earth of terminations with sheath sectionalizing insulation
Previous versions
AS/NZS IEC 60840:2020
Online Library subscription information
Online library subscriptions provide a cost-effective solution for organisations of any size to access the latest standards, offering 24/7 access to a personalised catalogue. The service ensures subscribers have have the most up-to-date version of selected standards, incluing automatic updates for any amendments or versions. Pricing is dependent on the chosen standards and the number of concurrent users, with discounts applied from the standards PDF price. For customised subscriptions or further inquiries, contact the Online Library team.