Source: https://www.scribd.com/document/378502345/IEC-60502-2-2014
Timestamp: 2018-12-13 12:26:07+00:00
Document Index: 184735794

Matched Legal Cases: ['art 2', 'art 2', 'art 2', 'art 3', 'art 1', 'art 1', 'art 2', 'art 3', 'art 404', 'art 409', 'art 202', 'art 502', 'art 509', 'art 403', 'art 507', 'art 203', 'art 505', 'art 508', 'art 506', 'art 605', 'art 501', 'art 504', 'art 503', 'art 402', 'art 405', 'art 606', 'art 401', 'art 201', 'art 2', 'art 3', 'arte 1']

IEC 60502-2_2014 | Insulator (Electricity) | International Electrotechnical Commission
IEC 60502-2_2014
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Tabla tensiones IEC 60502-2_2014
Copyright © IEC, 2014, Geneva, Switzerland. All rights reserved. Sold by SIS under license from IEC and SEK.
No part of this document may be copied, reproduced or distributed in any form without the prior written consent of the IEC.
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2 kV) up to 30 kV (Um = 36 kV) Câbles d'énergie à isolant extrudé et leurs accessoires pour des tensions assignées de 1 kV (Um = 1. .20 ISBN 978-2-8322-1409-1 Warning! Make sure that you obtained this publication from an authorized distributor. All rights reserved.2 kV) à 30 kV (Um = 36 kV) INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE PRICE CODE CODE PRIX XC ICS 29. Geneva. 2014. Switzerland.2 kV) à 30 kV (Um = 36 kV) – Partie 2: Câbles de tensions assignées de 6 kV(Um = 7. reproduced or distributed in any form without the prior written consent of the IEC.2 kV) up to 30 kV (Um = 36 kV) – Part 2: Cables for rated voltages from 6 kV (Um = 7. Provläsningsexemplar / Preview IEC 60502-2 ® Edition 3.060. Sold by SIS under license from IEC and SEK. ® Registered trademark of the International Electrotechnical Commission Marque déposée de la Commission Electrotechnique Internationale Copyright © IEC.0 2014-02 INTERNATIONAL STANDARD NORME INTERNATIONALE Power cables with extruded insulation and their accessories for rated voltages from 1 kV (Um = 1. No part of this document may be copied. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.
.............................2 Insulating compounds........... 17 5 Conductors ............................. 19 8................................................................................................................. 22 13 Metal armour .........................................................................1 Construction ..............................2 Three-core cables ...................... 21 10.................... 16 4....................................................................... 21 11 Concentric conductor ............... reproduced or distributed in any form without the prior written consent of the IEC............ 23 13........................ 22 13......................................................................................................3 Thickness of extruded inner covering ....................................2................................................................................................2 Conductor screen ...................................................... 10 1 Scope . cross-sections.......................... 14 4 Voltage designations and materials ........................2 Inner coverings and fillers ............... 19 8 Assembly of three-core cables..3 Sheathing compounds .................................................4 Thickness of lapped inner covering ..........................................3 Metal screens not associated with semi-conducting layers ................................................1 Definitions of dimensional values (thicknesses......................... 12 2 Normative references ................................................................................. inner coverings and fillers .................................................. Switzerland.... 20 9 Metal layers for single-core and three-core cables ....... 20 8.............................1 General ...1 Construction ............................................................................................................................................1 Rated voltages .................................................1 Types of metal armour ................................................ 19 7......... 17 6 Insulation ......................... 19 7..........1 Lead sheath .................................... 23 13.................. Sold by SIS under license from IEC and SEK........................................................... 21 11.....................................................2 Requirements ......................................... No part of this document may be copied................................. 22 12............................................................................... 21 10................................................................................................ 15 4............................................................................................. etc......................................................................3 Application ................................ 19 7..........2 Other metal sheaths .....................................................................2 Insulation thickness ........................................2 Definitions concerning the tests ......... Provläsningsexemplar / Preview –2– 60502-2 © IEC:2014 CONTENTS FOREWORD . 12 3 Terms and definitions ....... 20 8.................................................................................. 20 8....... 14 3...................................................................1 Material ..................... 19 8........... 21 11.......................................... 17 7 Screening ..........................1 Construction .............................3 Cables having a collective metal layer (see Clause 9) ............................................. 19 8....................................................2 Requirements ..................................................... 21 10................................................................................... 21 11............. 22 13..... 21 10 Metal screen .....................................................................3......3 Application of armour .............................................. All rights reserved............................... 22 12 Metal sheath ..................................................2 Materials ........... 17 6........................................ .................................................... 22 13..........1 Single-core cables .........................................3........................................................................................................ 23 Copyright © IEC................................2 Material ............... 15 4.........................................2............................................................................................................... Geneva................................. 22 12.......................................................................................... 14 3.........) ................................ 17 6.......................................................................2................................. 19 8...................................................................................................................... 2014..3 Insulation screen .....................2................................................. 20 8........................1 General ..........................................................................4 Cables having a metal layer over each individual core (see Clause 10) ................................................................
............ ...... 29 17.......................................2 Electrical and physical tests ...... 26 16.............2 Measurement on tapes ..... 31 17....... 29 17. 30 17.................... 30 17............................... 26 16 Routine tests .....................................3 Test procedure for three-core cables ..........2 Electrical resistance of conductors .......5 Correlation between cable diameters and armour dimensions ....2 Frequency of sample tests ................................ 27 16.................... 28 17...........................................................................2 Requirements for the insulation .....3 Thickness .................................................... 31 17...........................1 General ...................2..4...................... 28 17.....................................................5 Requirement ...... 31 Copyright © IEC.............................2 Material ................................................... Provläsningsexemplar / Preview 60502-2 © IEC:2014 –3– 13.....................7.............................................................. 28 17 Sample tests ................. 30 17................................ Sold by SIS under license from IEC and SEK.. 23 13.................................................................................................................. 28 16..........................4 Voltage test .........................2 Test procedure for single-core cables ..............................3 Waveform of impulse test voltages ....................................................................................6 Round or flat wire armour ........ 28 17......................................5 Electrical test on oversheath of the cable .............................................5..... 24 13...............3 Requirements for the non-metal sheaths ..................1 General ...................... 28 17..........................4 Test voltage .........................................................................4..............1 General ............... 24 13................................................................................9 Voltage test for 4 h .......................................3 Requirements ..................5 Measurement of thickness of insulation and of non-metal sheaths (including extruded separation sheaths..............................4..........6 Measurement of thickness of lead sheath ......................................................................................................................................................... 30 17... 26 16.........2 Strip method ........1 General ....................................3............. 30 17..........1 General ......................................................................... 26 15............1 Measurement on wires ....................................................................................................................... but excluding inner extruded coverings) ........................................................... 29 17..............................3 Repetition of tests ..........4 Conductor examination .....4 Lapped bedding under armour for lead sheathed cables ...... 23 13................ reproduced or distributed in any form without the prior written consent of the IEC..........................................................1 General ...6...........................6...3 Separation sheath ................................. 25 15 Test conditions .............7...................................3....................... 27 16......... 29 17............................1 Conductor examination and check of dimensions ............. 25 14 Oversheath .............. 27 16.3 Partial discharge test .......................................................................................................................................................................... 28 17..................4 Determination of the cable conductor temperature ...........3 Ring method ....................................................1 Ambient temperature ..................................................................................................4 Dimensions of the armour wires and armour tapes............... Switzerland......................... 26 15......................... 27 16.............2 Frequency and waveform of power frequency test voltages ............ 25 14................................................ Geneva.................................................................4....................... 25 14.................... 24 13.......... 26 15....................7 Double tape armour ............................................ 30 17.................. 2014..............6.............................................. 31 17.................. All rights reserved............................ 27 16............................................7............. 27 16...... No part of this document may be copied................... 25 14.......................................... 29 17................................................................................................. 26 15.................................................... 26 16.......................4..........................5.........................................5................................................................8 Measurement of external diameter .......................................... 30 17...................2....................................................................................................7 Measurement of armour wires and tapes ........
...........3 Requirements ....... 31 17...................4...........................................................6/6 (7..............................................................................................................................................7 Heating cycle test .....2) kV having unscreened insulation .....................................................9....1 Sampling ............3 Special provisions ..3 Conditioning and mechanical tests ....................... 34 18..........................................................................9 Voltage test for 4 h ....................................................4....5......... 36 18.....2.................................... 38 19.3 Insulation resistance measurement at maximum conductor temperature ............5 Partial discharge test .............................................................................2 Requirements ............................................ Sold by SIS under license from IEC and SEK.....................................5 Impulse test .......... 38 19................................ reproduced or distributed in any form without the prior written consent of the IEC.............3....................... Geneva.....................................1 General .....................................3..........10 Resistivity of semi-conducting screens .....................................................4 Voltage test for 4 h ............................ 32 18....... 33 18...............1 Sampling .................. 37 19...................... Switzerland............. 38 19........... 37 19.3 Cables of rated voltage 3.... electrical ........................................................................1 General ....10 Hot set test for EPR..... non-electrical .............2 Measurement of thickness of insulation .......3..................... 37 19.. 38 19................................................................... 37 19.......3.............. 33 18.........................1 Procedure ......................................... 37 19......................4............................................2 Procedure ..................................2.......9.... 32 18........9....................................................................................1 Sampling ................................ 38 Copyright © IEC................3 Measurement of thickness of non-metal sheaths (including extruded separation sheaths...................................... 34 18........ 37 19 Type tests.......... 37 19..............................2.................. 38 19.........2 Procedure .................... 38 19....................................3 Requirements ................................................1 General .........................................3....................2 Sequence of tests .............................. 31 17......................................................... 38 19....10....................................................................3..................6 Tan δ measurement for cables of rated voltage 6/10 (12) kV and above ...... 38 19..................................... 38 19.............................. HEPR and XLPE insulations and elastomeric sheaths ..........................4 Requirements ............................................ 32 18 Type tests..2...............................2...........................3..2....1 Sampling .......5.............................2................................ 31 17.......................................... 31 17........................................................................................................10.................2 Insulation resistance measurement at ambient temperature ......3....... 32 18.....2 Ageing treatments .4 Measurement of thickness of lead sheath ..................... No part of this document may be copied.............2............ 32 18...................... 32 18.........5........................................................................................ 37 19........................................................................................................................................... Provläsningsexemplar / Preview –4– 60502-2 © IEC:2014 17............................1 Sampling ...................... 31 17.... 35 18. 37 19......8 Impulse test followed by a voltage test .........3 Test voltages ....... 35 18.................................2.............. 35 18............................5...........................4 Bending test .....2 Cables having conductor screens and insulation screens .................................................2.......................2........................ 32 18...........3 Requirements .. 33 18....... 37 19.................... 31 17......2.............................. but excluding inner coverings) ...............9...................................1 General ..................................................................................................5 Tests for determining the mechanical properties of insulation before and after ageing ........... All rights reserved................................................................................................ 2014..................................................2 Procedure ............................................2............ ........................ 36 18....... 35 18.................4 Requirements .. 34 18.........2 Procedure ............
.........6..................2 Requirements .............................19 Thermal stability test for PVC insulation .............1 Sampling ........................................10 Test on PVC insulation and sheaths at low temperatures ...... 41 19...................................................1 Procedure ............3 Ageing treatment .........................................................................1 Procedure ................................... 41 19.............................8..................15...................................3 Conditioning and mechanical tests ...........17...........................................................................................1 Procedure .............................................10..................2 Requirements ......... 41 19....... 40 19.............. 39 19.............................. 40 19...................... 41 19..........14.......................12.................................................................... 38 19....1 Procedure ..................................................2 Sampling ............... 38 19.............. 40 19............................................ reproduced or distributed in any form without the prior written consent of the IEC............................................................................... 39 19...............2 Ageing treatments ........15.................6............................................................................................................................20......................14 Oil immersion test for elastomeric sheaths ....................... 40 19..................... 41 Copyright © IEC...................................................................1 Procedure ............................................. All rights reserved........... 41 19......2 Requirements ...................20 Determination of hardness of HEPR insulation ................................ 40 19......................................... 39 19.......................... 39 19...............11...6.................... No part of this document may be copied.............................................2 Requirements ...........13 Hot set test for EPR.........................11 Test for resistance of PVC insulation and sheaths to cracking (heat shock test) .............9..........20.......... 40 19.............................................. 39 19........................ 41 19................ 39 19.............................. 41 19............. Switzerland............................1 General ......................................................... 40 19.......................................................... 39 19........ .................................................................................12................................................................. 41 19.....................4 Mechanical tests ..17....... 40 19.... 38 19.......................10.....................................................18..........................................................................................12 Ozone resistance test for EPR and HEPR insulations .21 Determination of the elastic modulus of HEPR insulation .............. 40 19........................................................ 41 19.........................................19......... 41 19............................................................ 39 19... 39 19.........................................2 Requirements ................................2 Requirements ............ Provläsningsexemplar / Preview 60502-2 © IEC:2014 –5– 19........... 39 19.. 40 19....... Sold by SIS under license from IEC and SEK................................6............1 Procedure ............................................16 Flame spread test on single cables ................................ 39 19............. 40 19.............7 Additional ageing test on pieces of completed cables ...................................... 40 19.........7.................................... 41 19...............................................5 Requirements ................................ 40 19........... 41 19..2 Requirements ....9....1 Procedure ...15 Water absorption test on insulation ....................... 39 19............................................................... HEPR and XLPE insulations and elastomeric sheaths ............8.............. Geneva... 40 19............................................................18........17 Measurement of carbon black content of black PE oversheaths .................................1 Procedure ..............18 Shrinkage test for XLPE insulation ........4 Requirements .6 Tests for determining the mechanical properties of non-metal sheaths before and after ageing ........19.........1 Procedure . 40 19................... 41 19..................14....9 Pressure test at high temperature on insulations and non-metal sheaths .......1 Procedure ........................................................................ 39 19..1 Procedure ....2 Requirements ..................................................................................... 38 19.....................................................................................7...............8 Loss of mass test on PVC sheaths of type ST 2 .......2 Requirements .........2 Requirements ...7........................................................... 40 19...................7......7... 2014........2 Requirements ......................11...........................................
..2 DC testing .............................................3 Requirements .................................. 53 A..... 57 B.......................................... 51 A............................................................. 50 A............... 51 A.......................1 Procedure .............................................5........................... 56 B........................... 42 19......2...............24 Water penetration test ......................................................................2.................................22......6 Lead sheath ................................................................21..........2........... 56 B....................................................5......................................................................... 56 B.................................................................. .2................................................................................ 51 A..................................................................3.........................2.............................................................................................2 Requirements ...... 44 Annex A (normative) Fictitious calculation method for determination of dimensions of protective coverings ....................... 58 B............................................. 58 B.. 58 B....... 42 19...............................22 Shrinkage test for PE oversheaths ...........5.....................2 Procedure ...............................1 General ......................8 Lapped bedding ........................................................ 2014....................... 42 19..........................2...............3 Temperatures.......1 General ................... 55 B................................................7 Separation sheath .. 50 A...................2.................. 42 19.2........ Provläsningsexemplar / Preview –6– 60502-2 © IEC:2014 19...................... 42 19.... 43 20.................................................................................1 Conductors ................................................ 42 19............................................................ 74 C....... 50 A............................................2 Requirements .....................23.......................................................4 Inner coverings ................................................ 41 19........................................ Sold by SIS under license from IEC and SEK....... 74 Copyright © IEC......................................................3 Insulation test.....................................................................23.......2..10 Armour ..................................... 55 B.....22........ 50 A................................................5 Three-core cables .............1 Procedure ........................ 42 19................ 55 B........... 43 20................4 Soil thermal resistivity ......2 Cable constructions ...........2...................................................................................................... 55 B........................................................................................6 Screen bonding ............... 53 A............................................................................................................................................................... 43 20............... 43 20............. Geneva......5....................................................................... 52 A......1 General ........................5 Methods of installation .... 58 Annex C (normative) Rounding of numbers............... reproduced or distributed in any form without the prior written consent of the IEC...1 General ................ 57 B......6/6 kV up to 18/30 kV .................. 42 19......................... 54 Annex B (informative) Tabulated continuous current ratings for cables having extruded insulation and a rated voltage from 3.........21.. 43 20 Electrical tests after installation ........................ 43 20............................9 Correction factors ..............23 Strippability test for insulation screen ..........4 Single-core cables in earthenware ducts ....................................... 56 B.........1 Rounding of numbers for the purpose of the fictitious calculation method .....9 Additional bedding for tape-armoured cables (provided over the inner covering) .................................5....................................................................5 Concentric conductors and metal screens ................................ 53 A...............................2 Cores..................................2 Method .............................8 Rating factors for grouped circuits ...............7 Cable loading ...........................................3 Diameter over laid-up cores ...........................................................................................................3..........1 General ......................... 53 A................................................................................. 56 B.....................................2 DC voltage test of the oversheath ..................... No part of this document may be copied.......... Switzerland................................................................................23........................................3 Single-core cables buried direct .......................2 Single-core cables in air .................................... All rights reserved..........1 AC testing .........................................................................................
........................................................................................................1 General .......2 Installation of cable and temperature sensors .................................. 87 Figure B....... reproduced or distributed in any form without the prior written consent of the IEC.........................1 Method 1 – Test using a reference cable . 18 Table 6 – Nominal thickness of cross-linked polyethylene (XLPE) insulation ................. 81 Figure G............1 General ....................3... ............. 78 E....... 18 Copyright © IEC............................................... 77 Figure E................................................................................... 82 G..........3 Heating for the test ........................ 78 E......................... 16 Table 2 – Insulating compounds .2.............1 – Test on surfaces of large radius of curvature ......2..............3...............1 Purpose ........ 85 G............................................ Sold by SIS under license from IEC and SEK... 74 Annex D (normative) Method of measuring resistivity of semi-conducting screens .........................................................2........................................ 79 Figure F.......2 Calibration of the temperature of the main test loop .................... No part of this document may be copied....1 Test piece .........................1 – Preparation of samples for measurement of resistivity of conductor and insulation screens ... 2014........................................................................................................................ 79 Figure E................... 84 Table 1 – Recommended rated voltages U 0 ..................2 – Test on surfaces of small radius of curvature ...............4 Conditioning and test temperature .2 Test ................... Switzerland..... 82 G.........................................................................................5 Number of measurements .......................................... 17 Table 5 – Nominal thickness of PVC/B insulation .......................................................... 78 E.....................2... 16 Table 4 – Maximum conductor temperatures for different types of sheathing compound ..........3 Surfaces of small radius of curvature ............2.................................................................................................... 78 E..............3 Requirements ............1 – Schematic diagram of apparatus for water penetration test ................................................. 80 F............. 85 G........... 58 Figure D................................................... 57 Figure B.............................................................................................................................................................................3 Calibration method ....................................................................... 80 F........ Provläsningsexemplar / Preview 60502-2 © IEC:2014 –7– C...................................................... 80 F. 81 Annex G (informative) Determination of the cable conductor temperature ...2...............................3 – Single-core cables in earthenware ducts ...... 83 Figure G...... 85 Bibliography ........................................... 16 Table 3 – Maximum conductor temperatures for different types of insulating compound ............................ 56 Figure B................................... 84 G.............................................................................1 Test piece .2....................................... 78 E............................................................................. 57 Figure B.........................2 – Example of an arrangement of the temperature sensors on the conductor of the reference loop ...................................................2 Test procedure ............................................. 79 Annex F (normative) Water penetration test ..................................1 – Typical test set-up for the reference loop and the main test loop ......................................................... All rights reserved........2... Geneva.....................................................2 Method 2 – Test using conductor temperature calculations and measurement of the surface temperature .......2 Rounding of numbers for other purposes ..................... 75 Annex E (normative) Determination of hardness of HEPR insulations ................................. 82 G..... 82 G..........................................................................................................................1 – Single-core cables in air ......4 – Three-core cables .. 78 E............................................2 Surfaces of large radius of curvature ................... 82 G.......................................................... 78 E..........................................................2 – Single-core cables buried direct ..
......................................................................................................... 28 Table 12 – Number of samples for sample tests ...... 24 Table 10 – Nominal thickness of armour tapes .... No part of this document may be copied.............2 – Increase of diameter for concentric conductors and metal screens ..... 67 Copyright © IEC.................................................................................................................................... 34 Table 15 – Electrical type test requirements for insulating compounds ....... 44 Table 17 – Test requirements for mechanical characteristics of insulating compounds (before and after ageing) ...........1 – Nominal screen cross-sectional areas .............3 – Increase of diameter for additional bedding ................................6/6 kV to 18/30 kV * – Aluminium conductor............................... 62 Table B................................. 24 Table 11 – Routine test voltages ........................ 52 Table A.......................................................................................... 51 Table A........................... Switzerland.. 64 Table B...............3 – Current ratings for single-core cables with XLPE insulation – Rated voltage 3.............. Geneva........................................ armoured and unarmoured ................................ 2014.................8 – Current rating for three-core EPR insulated cables – Rated voltage 3.......................................................................... 18 Table 8 – Thickness of extruded inner covering .. 46 Table 19 – Test requirements for particular characteristics of various crosslinked insulating compounds ................11 – Correction factors for ambient ground temperatures other than 20 °C .................... Sold by SIS under license from IEC and SEK............. 53 Table B..6/6 kV to 18/30 kV * – Aluminium conductor ................................................................................ 65 Table B................... armoured and unarmoured ................................................6/6 kV to 18/30 kV * – Aluminium conductor................7 – Current rating for three-core XLPE insulated cables – Rated voltage 3.................6/6 kV to 18/30 kV * – Copper conductor ....................................................... reproduced or distributed in any form without the prior written consent of the IEC....................... 66 Table B............................................................ 60 Table B..... 48 Table 23 – Test requirements for particular characteristics of elastomeric sheathing compound .6/6 kV to 18/30 kV * – Aluminium conductor ......................................................................................................... Provläsningsexemplar / Preview –8– 60502-2 © IEC:2014 Table 7 – Nominal thickness of ethylene propylene rubber (EPR) and hard ethylene propylene rubber (HEPR) insulation .............................................................................................................5 – Current ratings for single-core cables with EPR insulation – Rated voltage 3...................... 45 Table 18 – Test requirements for particular characteristics for PVC insulating compound .................. 31 Table 14 – Impulse voltages ......................1 – Fictitious diameter of conductor ............................9 – Current rating for three-core EPR insulated cables – Rated voltage 3................................. 44 Table 16 – Non-electrical type tests (see Tables 17 to 23) .............. 49 Table A..............4 – Current ratings for single-core cables with EPR insulation – Rated voltage 3................................... 47 Table 20 – Test requirements for mechanical characteristics of sheathing compounds (before and after ageing) .................................................10 – Correction factors for ambient air temperatures other than 30 °C ................................................................................................ armoured and unarmoured .......................... All rights reserved............ 20 Table 9 – Nominal diameter of round armour wires ......................................................................................6/6 kV to 18/30 kV * – Copper conductor............................. ....................... 59 Table B. 61 Table B................................................... 47 Table 21 – Test requirements for particular characteristics for PVC sheathing compounds ...... 48 Table 22 – Test requirements for particular characteristics of PE (thermoplastic polyethylene) sheathing compounds ............................................ 66 Table B.............................6/6 kV to 18/30 kV * – Copper conductor . 55 Table B... armoured and unarmoured.........................................................................................................6/6 kV to 18/30 kV * – Copper conductor........................ 63 Table B................ 29 Table 13 – Sample test voltages ............................2 – Current ratings for single-core cables with XLPE insulation – Rated voltage 3...................................6 – Current rating for three-core XLPE insulated cables – Rated voltage 3...................................................................
.....................................................16 – Correction factors for soil thermal resistivities other than 1..................18 – Correction factors for groups of three-core cables in horizontal formation laid direct in the ground .... 71 Table B......................... 71 Table B.... No part of this document may be copied... 72 Table B........................................................................................14 – Correction factors for soil thermal resistivities other than 1..................................... Switzerland............................... 73 Copyright © IEC.............. 67 Table B.........................................5 K .........................................................................................................8 m for cables in ducts . 70 Table B.............................5 K .. 70 Table B................ 68 Table B........................................ Geneva.....15 – Correction factors for soil thermal resistivities other than 1...............................22 – Reduction factors for groups of more than one multi-core cable in air – To be applied to the current-carrying capacity for one multi-core cable in free air .......... 69 Table B..20 – Correction factors for groups of three-core cables in single way ducts in horizontal formation ..................................23 – Reduction factors for groups of more than one circuit of single-core cables (Note 2) – To be applied to the current-carrying capacity for one circuit of single-core cables in free air ................................................................. ......................... reproduced or distributed in any form without the prior written consent of the IEC....... m/W for three-core cables in ducts .... 68 Table B............5 K ......................................17 – Correction factors for soil thermal resistivities other than 1....................................................................19 – Correction factors for groups of three-phase circuits of single-core cables laid direct in the ground ...........................8 m for direct buried cables ..........5 K ........................ m/W for direct buried three-core cables ................................. Provläsningsexemplar / Preview 60502-2 © IEC:2014 –9– Table B.......12 – Correction factors for depths of laying other than 0............................. Sold by SIS under license from IEC and SEK................. 69 Table B...............................13 – Correction factors for depths of laying other than 0...................................................... m/W single-core cables in buried ducts................... 67 Table B.21 – Correction factors for groups of three-phase circuits of single-core cables in single-way ducts . m/W for direct buried single-core cables ................ All rights reserved................ 2014.....................
2) The formal decisions or agreements of IEC on technical matters express. Technical Reports. in some areas. Geneva. IEC shall not be held responsible for identifying any or all such patent rights. Sold by SIS under license from IEC and SEK. Copyright © IEC. 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. reproduced or distributed in any form without the prior written consent of the IEC.2 kV) UP TO 30 kV (Um = 36 kV) – Part 2: Cables for rated voltages from 6 kV (Um = 7. 7) No liability shall attach to IEC or its directors. an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. b) a new subclause for the determination of the cable conductor temperature. Switzerland. access to IEC marks of conformity. c) a modified procedure for the routine voltage test. or for costs (including legal fees) and expenses arising out of the publication. use of. International. any IEC National Committee interested in the subject dealt with may participate in this preparatory work. servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury. published in 2005. 6) All users should ensure that they have the latest edition of this publication. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. or reliance upon. this IEC Publication or any other IEC Publications. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate. IEC is not responsible for any services carried out by independent certification bodies. Provläsningsexemplar / Preview – 10 – 60502-2 © IEC:2014 INTERNATIONAL ELECTROTECHNICAL COMMISSION ____________ POWER CABLES WITH EXTRUDED INSULATION AND THEIR ACCESSORIES FOR RATED VOLTAGES FROM 1 kV (Um = 1. Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Technical Specifications. IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. International Standard IEC 60502-2 has been prepared by IEC technical committee 20: Electric cables. and constitutes a technical revision. IEC publishes International Standards. . 4) In order to promote international uniformity. whether direct or indirect. No part of this document may be copied. To this end and in addition to other activities. governmental and non- governmental organizations liaising with the IEC also participate in this preparation. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and.2 kV) up to 30 kV (Um = 36 kV) 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. as nearly as possible. Their preparation is entrusted to technical committees. property damage or other damage of any nature whatsoever. employees. 2014. All rights reserved. This third edition cancels and replaces the second edition. This edition includes the following significant technical changes with respect to the previous edition: a) a simplified calculation procedure for the thickness of the lead sheath and the oversheath. 8) Attention is drawn to the Normative references cited in this publication. IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
iec. In addition. the publication will be • reconfirmed. Switzerland. or • amended.1Hz test after installation. A list of all parts in the IEC 60502 series. published under the general title Power cables with extruded insulation and their accessories for rated voltages from 1kV (U m = 1. Geneva. No part of this document may be copied. the modified structure of the IEC 60811 series has been adopted for this third edition. All rights reserved. The text of this standard is based on the following documents: FDIS Report on voting 20/1469A/FDIS 20/1472/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. g) the inclusion of a 0. e) modified requirements for the non-metal sheaths including semi-conductive layer. The following editorial changes have been made within the English version: – 'metallic’ has been replaced by ‘metal’. Sold by SIS under license from IEC and SEK.2 kV) up to 30 kV (U m = 36 kV). f) modified tolerances for the bending test cylinder. This publication has been drafted in accordance with the ISO/IEC Directives. – ‘thermosetting’ has been replaced by ‘crosslinked’. can be found on the IEC website. 2014. reproduced or distributed in any form without the prior written consent of the IEC. Part 2. At this date. Provläsningsexemplar / Preview 60502-2 © IEC:2014 – 11 – d) a new subclause for a routine electrical test on oversheath. Copyright © IEC. 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. . • withdrawn. • replaced by a revised edition.ch" in the data related to the specific publication.
For dated references. it is recommended that the possible risk of radial water ingress is considered. Impulse tests on cables and their accessories IEC 60287-3-1. IEC 60038. Electric and optical fibre cables – Test methods for non-metallic materials Copyright © IEC.2 kV) up to 30 kV (Um = 36 kV) 1 Scope This part of IEC 60502 specifies the construction. for example cables for overhead networks. Tests on cable oversheaths which have a special protective function and are applied by extrusion IEC 60230. Guide to the selection of high-voltage cables IEC 60228. IEC standard voltages IEC 60060-1. All rights reserved. 2 Normative references The following documents. No part of this document may be copied. When determining applications. Electric cables – Calculation of the current rating – Part 3: Sections on operating conditions – Section 1: Reference operating conditions and selection of cable type IEC 60332-1-2. in whole or in part. Tests on electric and optical fibre cables under fire conditions – Part 1-2: Test for vertical flame propagation for a single insulated wire or cable – Procedure for 1 kW pre- mixed flame IEC 60811 (all parts). . the mining industry. Sold by SIS under license from IEC and SEK. High-voltage test techniques – Part 1: General definitions and test requirements IEC 60060-3. Geneva. Switzerland. the latest edition of the referenced document (including any amendments) applies.2 kV) UP TO 30 kV (Um = 36 kV) – Part 2: Cables for rated voltages from 6 kV (Um = 7. nuclear power plants (in and around the containment area) nor for submarine use or shipboard application. only the edition cited applies. For undated references. 2014. Provläsningsexemplar / Preview – 12 – 60502-2 © IEC:2014 POWER CABLES WITH EXTRUDED INSULATION AND THEIR ACCESSORIES FOR RATED VOLTAGES FROM 1 kV (Um = 1. dimensions and test requirements of power cables with extruded solid insulation from 6 kV up to 30 kV for fixed installations such as distribution networks or industrial installations. Conductors of insulated cables IEC 60229:2007. Cables for special installation and service conditions are not included. High-voltage test techniques – Part 3: Definitions and requirements for on-site testing IEC 60183. Cable designs with barriers claimed to prevent longitudinal water penetration and an associated test are included in this part of IEC 60502. reproduced or distributed in any form without the prior written consent of the IEC. are normatively referenced in this document and are indispensable for its application.
Switzerland. . Electric and optical fibre cables – Test methods for non-metallic materials – Part 404: Miscellaneous tests – Mineral oil immersion tests for sheaths IEC 60811-405. Provläsningsexemplar / Preview 60502-2 © IEC:2014 – 13 – IEC 60811-201. No part of this document may be copied. Electric and optical fibre cables – Test methods for non-metallic materials – Part 409: Miscellaneous tests – Loss of mass test for thermoplastic insulations and sheaths IEC 60811-501. Electric and optical fibre cables – Test methods for non-metallic materials – Part 202: General tests – Measurement of thickness of non-metallic sheath IEC 60811-203. Electric and optical fibre cables – Test methods for non-metallic materials – Part 502: Mechanical tests – Shrinkage test for insulations IEC 60811-503. Electric and optical fibre cables – Test methods for non-metallic materials – Part 509: Mechanical tests – Test for resistance of insulations and sheaths to cracking (heat shock test) IEC 60811-605. Electric and optical fibre cables – Test methods for non-metallic materials – Part 403: Miscellaneous tests – Ozone resistance test on cross-linked compounds IEC 60811-404. Electric and optical fibre cables – Test methods for non-metallic materials – Part 507: Mechanical tests – Hot set test for cross-linked materials IEC 60811-508. Electric and optical fibre cables – Test methods for non-metallic materials – Part 203: General tests – Measurement of overall dimensions IEC 60811-401. Geneva. Electric and optical fibre cables – Test methods for non-metallic materials – Part 505: Mechanical tests – Elongation at low temperature for insulations and sheaths IEC 60811-506. Electric and optical fibre cables – Test methods for non-metallic materials – Part 508: Mechanical tests – Pressure test at high temperature for insulation and sheaths IEC 60811-509. Electric and optical fibre cables – Test methods for non-metallic materials – Part 506: Mechanical tests – Impact test at low temperature for insulations and sheaths IEC 60811-507. Electric and optical fibre cables – Test methods for non-metallic materials – Part 605: Physical tests – Measurement of carbon black and/or mineral filler in polyethylene compounds IEC 60811-606. Electric and optical fibre cables – Test methods for non-metallic materials – Part 501: Mechanical tests – Tests for determining the mechanical properties of insulating and sheathing compounds IEC 60811-502. Electric and optical fibre cables – Test methods for non-metallic materials – Part 504: Mechanical tests – Bending tests at low temperature for insulation and sheaths IEC 60811-505. Electric and optical fibre cables – Test methods for non-metallic materials – Part 503: Mechanical tests – Shrinkage test for sheaths IEC 60811-504. 2014. Electric and optical fibre cables – Test methods for non-metallic materials – Part 402: Miscellaneous tests – Water absorption tests IEC 60811-403. Electric and optical fibre cables – Test methods for non-metallic materials – Part 405: Miscellaneous tests – Thermal stability test for PVC insulations and PVC sheaths IEC 60811-409. Electric and optical fibre cables – Test methods for non-metallic materials – Part 606: Physical tests – Methods for determining the density IEC 60853 (all parts). Electric and optical fibre cables – Test methods for non-metallic materials – Part 401: Miscellaneous tests – Thermal ageing methods – Ageing in an air oven IEC 60811-402. Electric and optical fibre cables – Test methods for non-metallic materials – Part 201: General tests – Measurement of insulation thickness IEC 60811-202. Sold by SIS under license from IEC and SEK. All rights reserved. reproduced or distributed in any form without the prior written consent of the IEC. Calculation of the cyclic and emergency current rating of cables Copyright © IEC.
2 sample tests tests made by the manufacturer on samples of completed cable or components taken from a completed cable. on a general commercial basis. in this standard.2. the following terms and definitions apply.1. reproduced or distributed in any form without the prior written consent of the IEC. 3.1 routine tests tests made by the manufacturer on each manufactured length of cable to check that each length meets the specified requirements 3. Rubber. nominal values give rise to values to be checked by measurements taking into account specified tolerances. Provläsningsexemplar / Preview – 14 – 60502-2 © IEC:2014 IEC 60853-2.1 Definitions of dimensional values (thicknesses. the median value is the middle value if the number of available values is odd. Geneva. in order to demonstrate satisfactory performance characteristics to meet the intended application Copyright © IEC. at a specified frequency.3 type tests tests made before supplying. No part of this document may be copied. Sold by SIS under license from IEC and SEK.2 kV) up to 30 kV (U m = 36 kV) ISO 48.1 nominal value value by which a quantity is designated and which is often used in tables Note 1 to entry: Usually. Switzerland. Calculation of the cyclic and emergency current rating of cables – Part 2: Cyclic rating of cables greater than 18/30 (36) kV and emergency ratings for cables of all voltages IEC 60885-3. All rights reserved. vulcanized or thermoplastic – Determination of hardness (hardness between 10 IRHD and 100 IRHD) 3 Terms and definitions For the purposes of this document.2 Definitions concerning the tests 3. 2014.2 approximate value value which is neither guaranteed nor checked.1. cross-sections. for example.2. so as to verify that the finished product meets the specified requirements 3.1. a type of cable covered by this standard. it is used.2.4 fictitious value value calculated according to the "fictitious method'' described in Annex A 3.3 median value when several test results have been obtained and ordered in an increasing (or decreasing) succession. and the mean of the two middle values if the number is even 3. Electrical test methods for electric cables – Part 3: Test methods for partial discharge measurements on lengths of extruded power cables IEC 60986. etc.1. 3. . for the calculation of other dimensional values 3.) 3. Short-circuit temperature limits of electric cables with rated voltages from 6 kV (U m = 7.
Switzerland. If the system is expected to be operated fairly often with a permanent earth fault. The total duration of earth faults in any year should not exceed 125 h.6/6 (7. not exceeding 8 h on any occasion. systems are divided into three categories: – category A: this category comprises those systems in which any phase conductor that comes in contact with earth or an earth conductor is disconnected from the system within 1 min. Um is the maximum value of the "highest system voltage'' for which the equipment may be used (see IEC 60038). unless changes are made in the cable materials or design or manufacturing process which might change the performance characteristics. Copyright © IEC.2. the extra stresses on the insulation of cables during the earth fault reduce the life of the cables to a certain degree. The values of U 0 recommended for cables to be used in three-phase systems are listed in Table 1. they need not be repeated.g.4 electrical tests after installation tests made to demonstrate the integrity of the cable and its accessories as installed 4 Voltage designations and materials 4. – category B: this category comprises those systems which. according to IEC 60183.2) – 6/10 (12) – 8. All rights reserved.8/10 – 11. under fault conditions. can be tolerated.5/20 – 17.7/15 (17.5/6 – 5. For cables covered by this standard. are operated for a short time with one phase earthed. Geneva. a longer period. In the voltage designation of cables U 0 /U(U m ): U0 is the rated power frequency voltage between conductor and earth or metal screen for which the cable is designed. it may be advisable to classify the system in category C. No part of this document may be copied.5) – 12/20 (24) – 18/30 (36) kV. NOTE The voltages given above are the correct designations although in some countries other designations are used. 3. . after they have been made. It should be realized that in a system where an earth fault is not automatically and promptly isolated.1 Rated voltages The rated voltages U 0 /U(U m ) of the cables considered in this standard are as follows: U 0 /U(U m ) = 3. e. Sold by SIS under license from IEC and SEK. should not exceed 1 h. U is the rated power frequency voltage between conductors for which the cable is designed. Provläsningsexemplar / Preview 60502-2 © IEC:2014 – 15 – Note 1 to entry: These tests are of such a nature that. This period. – category C: this category comprises all systems which do not fall into category A or B. The rated voltage of the cable for a given application shall be suitable for the operating conditions in the system in which the cable is used. reproduced or distributed in any form without the prior written consent of the IEC.3/30 kV. 3. To facilitate the selection of the cable. 2014.
All rights reserved.6 6.0 18. No part of this document may be copied.0 12. Switzerland. Provläsningsexemplar / Preview – 16 – 60502-2 © IEC:2014 Table 1 – Recommended rated voltages U 0 Highest system voltage Rated voltage (U 0 ) (U m ) kV kV Categories A and B Category C 7.0 8. Table 3 – Maximum conductor temperatures for different types of insulating compound Maximum conductor temperature °C Insulating compound Normal operation Short-circuit (5 s maximum duration) Polyvinyl chloride (PVC/B) Conductor cross-section ≤300 mm 2 70 160 Conductor cross-section >300 mm 2 70 140 Cross-linked polyethylene (XLPE) 90 250 Ethylene propylene rubber (EPR and HEPR) 90 250 The temperatures in Table 3 are based on the intrinsic properties of the insulating materials. together with their abbreviated designations. in normal operation.0 24.7 17.2 Insulating compounds The types of insulating compound covered by this standard are listed in Table 2.5 8.0 – 4.0 18.0 12.6/6 kV PVC/B* b) Crosslinked: ethylene propylene rubber or similar (EPM or EPDM) EPR high modulus or hard grade ethylene propylene rubber HEPR cross-linked polyethylene XLPE * Insulating compound based on polyvinyl chloride intended for cables with rated voltages U 0 /U ≤ 1. The maximum conductor temperatures for different types of insulating compound covered by this standard are given in Table 3.7 12. For example.2 3. It is important to take into account other factors when using these values for the calculation of current ratings. 2014. reproduced or distributed in any form without the prior written consent of the IEC. Geneva. if a cable directly buried in the ground is operated under continuous load (100 % load factor) at the maximum conductor temperature shown in the table. Copyright © IEC. Table 2 – Insulating compounds Abbreviated Insulating compound designation a) Thermoplastic polyvinyl chloride intended for cables with rated voltages U 0 /U = 3. Sold by SIS under license from IEC and SEK.0 36. .8/3 kV is designated PVC/A in IEC 60502-1.0 6.
Table 4 – Maximum conductor temperatures for different types of sheathing compound Maximum conductor Abbreviated temperature in Sheathing compound designation normal operation °C a) Thermoplastic: polyvinyl chloride (PVC) ST 1 80 ST 2 90 polyethylene ST 3 80 ST 7 90 b) Elastomeric: polychloroprene. For guidance on the short-circuit temperatures. increase from its original value as a result of drying-out processes. reference should be made to Annex B. 6 Insulation 6.3 Sheathing compounds The maximum conductor temperatures for the different types of sheathing compound covered by this standard are given in Table 4. adequate provisions shall be made.10 to B. For guidance on continuous current ratings. .23. reproduced or distributed in any form without the prior written consent of the IEC. reference should be made to IEC 60986. 4. Geneva. All rights reserved. If such operating conditions are foreseen. in Tables B. Copyright © IEC. and correction factors for deviation laying conditions. Provläsningsexemplar / Preview 60502-2 © IEC:2014 – 17 – the thermal resistivity of the soil surrounding the cable may. chlorosulfonated polyethylene SE 1 85 or similar polymers 5 Conductors The conductors shall be either of class 1 or class 2 of plain or metal-coated annealed copper or of plain aluminium or aluminium alloy in accordance with IEC 60228. Sold by SIS under license from IEC and SEK. As a consequence. the conductor temperature may greatly exceed the maximum value. 2014.1 Material Insulation shall be extruded dielectric of one of the types listed in Table 2. in the course of time. Switzerland.2 to B. 6. For class 2 conductors measures may be taken to achieve longitudinal watertightness. No part of this document may be copied. The thickness of any separator or semi-conducting screen on the conductor or over the insulation shall not be included in the thickness of the insulation. including the ratings under standard laying conditions.9.2 Insulation thickness The nominal insulation thicknesses are specified in Tables 5 to 7. in Tables B.
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