1、 Power cables with extruded insulation and their accessories for rated voltages from 1 kV (Um= 1,2 kV) up to 30 kV (Um= 36 kV) Part 2: Cables for rated voltages from 6 kV (Um= 7,2 kV) up to 30 kV (Um= 36 kV) Reference number IEC 60502-2:2005(E) INTERNATIONAL STANDARD IEC60502-2Second edition2005-03T
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8、her information. Customer Service Centre If you have any questions regarding this publication or need further assistance, please contact the Customer Service Centre: Email: custserviec.ch Tel: +41 22 919 02 11 Fax: +41 22 919 03 00 Power cables with extruded insulation and their accessories for rate
9、d voltages from 1 kV (Um= 1,2 kV) up to 30 kV (Um= 36 kV) Part 2: Cables for rated voltages from 6 kV (Um= 7,2 kV) up to 30 kV (Um= 36 kV) For price, see current catalogue IEC 2005 Copyright - all rights reserved No part of this publication may be reproduced or utilized in any form or by any means,
10、electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Electrotechnical Commission, 3, rue de Varemb, PO Box 131, CH-1211 Geneva 20, SwitzerlandTelephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmailiec.ch Web: www
11、.iec.ch INTERNATIONAL STANDARD IEC60502-2Second edition2005-03XC Commission Electrotechnique InternationaleInternational Electrotechnical Commission PRICE CODE 60502-2 IEC:2005 3 CONTENTS FOREWORD .13 1 Scope .17 2 Normative references .17 3 Terms and definitions .19 3.1 Definitions of dimensional v
12、alues (thicknesses, cross-sections, etc.).19 3.2 Definitions concerning the tests .21 4 Voltage designations and materials .21 4.1 Rated voltages .21 4.2 Insulating compounds.23 4.3 Sheathing compounds .25 5 Conductors.27 6 Insulation .27 6.1 Material.27 6.2 Insulation thickness.27 7 Screening.29 7.
13、1 Conductor screen .31 7.2 Insulation screen .31 8 Assembly of three-core cables, inner coverings and fillers .31 8.1 Inner coverings and fillers.31 8.2 Cables having a collective metallic layer (see Clause 9).33 8.3 Cables having a metallic layer over each individual core (see Clause 10).33 9 Metal
14、lic layers for single-core and three-core cables.35 10 Metallic screen .35 10.1 Construction.35 10.2 Requirements.35 10.3 Metallic screens not associated with semi-conducting layers.35 11 Concentric conductor.35 11.1 Construction.35 11.2 Requirements.37 11.3 Application .37 12 Metallic sheath .37 12
15、.1 Lead sheath .37 12.2 Other metallic sheaths.37 13 Metallic armour .37 13.1 Types of metallic armour .37 13.2 Materials .39 13.3 Application of armour.39 13.4 Dimensions of the armour wires and armour tapes.41 13.5 Correlation between cable diameters and armour dimensions .41 13.6 Round or flat wi
16、re armour .43 13.7 Double tape armour.43 60502-2 IEC:2005 5 14 Oversheath .43 14.1 General.43 14.2 Material.45 14.3 Thickness.45 15 Test conditions.45 15.1 Ambient temperature .45 15.2 Frequency and waveform of power frequency test voltages .45 15.3 Waveform of impulse test voltages.45 16 Routine te
17、sts.47 16.1 General.47 16.2 Electrical resistance of conductors.47 16.3 Partial discharge test.47 16.4 Voltage test.47 17 Sample tests .49 17.1 General.49 17.2 Frequency of sample tests.51 17.3 Repetition of tests .51 17.4 Conductor examination.51 17.5 Measurement of thickness of insulation and of n
18、on-metallic sheaths (including extruded separation sheaths, but excluding inner extruded coverings) .51 17.6 Measurement of thickness of lead sheath .53 17.7 Measurement of armour wires and tapes.55 17.8 Measurement of external diameter.55 17.9 Voltage test for 4 h .55 17.10 Hot set test for EPR, HE
19、PR and XLPE insulations and elastomeric sheaths.57 18 Type tests, electrical .57 18.1 Cables having conductor screens and insulation screens .57 18.2 Cables of rated voltage 3,6/6 (7,2) kV having unscreened insulation .65 19 Type tests, non-electrical.69 19.1 Measurement of thickness of insulation.6
20、9 19.2 Measurement of thickness of non-metallic sheaths (including extruded separation sheaths, but excluding inner coverings) .69 19.3 Tests for determining the mechanical properties of insulation before and after ageing.69 19.4 Tests for determining the mechanical properties of non-metallic sheath
21、s before and after ageing .71 19.5 Additional ageing test on pieces of completed cables.71 19.6 Loss of mass test on PVC sheaths of type ST2.73 19.7 Pressure test at high temperature on insulations and non-metallic sheaths.73 19.8 Test on PVC insulation and sheaths at low temperatures .73 19.9 Test
22、for resistance of PVC insulation and sheaths to cracking (heat shock test) .73 19.10 Ozone resistance test for EPR and HEPR insulations.75 19.11 Hot set test for EPR, HEPR and XLPE insulations and elastomeric sheaths.75 19.12 Oil immersion test for elastomeric sheaths.75 19.13 Water absorption test
23、on insulation.75 60502-2 IEC:2005 7 19.14 Flame spread test on single cables.75 19.15 Measurement of carbon black content of black PE oversheaths.75 19.16 Shrinkage test for XLPE insulation.77 19.17 Thermal stability test for PVC insulation.77 19.18 Determination of hardness of HEPR insulation .77 1
24、9.19 Determination of the elastic modulus of HEPR insulation.77 19.20 Shrinkage test for PE oversheaths.77 19.21 Strippability test for insulation screen .79 19.22 Water penetration test .79 20 Electrical tests after installation .81 20.1 D.C. voltage test of the oversheath .81 20.2 Insulation test.81 Annex A (normative) Fictitious calculation method for determination of dimensions of protective coverings.93 Annex B (informative) Tabulated continuous current rating
