IEC_60502-2-1997.pdf

60502-2IEC:1997-3-CONTENTSPageFOREWORD5Clause72 Normative references.73 Definitions.94 Voltage designations and materials.115C0 nducto0fs.156 insulation.157.198 Assembly of three-core cables,inner coverings and fillers.219 Metallic layers for single-core and three-core cables.2310 Metallic screen.2311 Concentric conductor.2512 Metallic sheath.2513 Metallic armour.2714 Oversheath.3315 Test c0 ndition5.3516 Routine tests.3517Sample tests3918 Type tests,electrical.4519 Type tests,non-electrical.5520Electrical tests after installation.*44444467AnnexesA Fictitious calculation method for determination of dimensions of protective coverings.85R0 unding of numbers95C Method of measuring resistivity of semi-conducting screens.97D Water penetration test.101Determination of hardness of HEPR insulations.10560502-21EC:1997-5-INTERNATIONAL ELECTROTECHNICAL COMMISSIONPOWER CABLES WITH EXTRUDED INSULATION AND THEIR ACCESSORIESFOR 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)FOREWORD1)The IEC(International Electrotechnical Commission)is a worldwide organization for standardization comprisingall national electrotcchnical committees(IEC National Committees).The object of the IEC is to promoteinternational co-operation on all questions concerning standardization in the electrical and electronic fields.Tothis end and in addition to other activities,the IEC publishes International Standards.Their preparation isentrusted to technical committees:any IEC National Committee interested in the subject dealt with mayparticipate in this preparatory work.International,governmental and non-governmental organizations liaisingwith the IEC also participate in this preparation.The IEC collaborates closely with the international Organizationfor Standardization(ISO)in accordance with conditions determined by agreement between the twoorganizations.2)The formal decisions or agreements of the IEC on technical matters express.as nearly as possible.aninternational consensus of opinion on the relevant subjects since each technical committee has representationfrom all interested Nat:onal Committees.3)The documents produced have the form of recommendations for international use and are published in the formof standards.technical reports or guides and they are accepted by the National Committees in that sense.4)In order to promote international unification,IEC National Committees undertake to apply IEC internationalStandards transparently to the maximum extent possible in their national and regional standards.Anydivergence between the IEC Standard and the corresponding national or regional standard shall be clearlyindicated in the latter.5)The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for anyequipment declared to be in conformity with one of its standards.6)Attention is drawn to the possibility that some of the elements of this International Standard may be the subjectof patent rights.The IEC shall not be held responsible for identifying any or all such patent rights.international Standard IEC 60502-2 has been prepared by subcommittee 20A:High-voltagecables,of IEC technical committee 20:Electric cables.The text of this standard is based on the following documents:FDISReport on voting20A/319/FDIS20A/348/RVDFull information on the voting for the approval of this standard can be found in the report onvoting indicated in the above table.IEC 60502 consists of the following parts,under the general title:Power cables with extruded insulationand their accessories for rated voltages from 1 kV(Um 1,2 kV)up to 30 kV(Um 36 kV):Part 1:Cables for rated voltages of 1 kV(Um 1,2 kV)and 3 kV(Um 3,6 kV);Part 2:Cables for rated voltages from 6 kV(Um 7,2 kV)up to 30 kV(Um=36 kV);Part 3:Reserved;Part 4:Test requirements on accessories for cables with rated voltages from 6 kV(Um 7,2 kV)up to 30 kV(Um=36 kV).Annexes A,B,C,D and E form an integral part of this standard.60502-21EC:1997-7POWER CABLES WITH EXTRUDED INSULATION AND THEIR ACCESSORIESFOR 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)1 ScopeThis part of IEC 60502 specifies the construction,dimensions and test requirements of powercables with extruded solid insulation from 6 kV up to 30 kV for fixed installations such asdistribution networks or industrial installations.Cables for special installation and service conditions are not included,for example cables foroverhead networks,the mining industry,nuclear power plants(in and around the containmentarea).submarine use or shipboard application.2 Normative referencesThe following normative documents contain provisions which through reference in this text,constitute provisions of this part of IEC 60502.At the time of publication,the editions indicatedwere valid.All normative documents are subject to revision.and parties to agreements basedon this part of IEC 60502 are encouraged to investigate.the possibility of applying the mostrecent editions of the normative documents indicated below.Members of IEC and ISO maintainregisters of currently valid international Standards.IEC 60038:1983,IEC standard voltagesIEC 60060-1:1989,High-voltage test techniques-Part 1:General definitions and testrequirementsIEC 60183:1984,Guide to the selection of high-voltage cablesIEC 60228:1978,Conductors of insulated cablesIEC 60230:1966,Impulse tests on cables and their accessoriesIEC 60332-1:1993,Tests on electric cables under fire conditions Part 1:Test on a singlevertical insulated wire or cableIEC 60502-1:1997,Power cables with extruded insulation and their accessories for ratedvoltages from 1 kV(Um 1,2 kV)up to 30 kV(Um 36 kV)-Part 1:Cables for rated voltagesof 1 kV(Um 1,2 kV)and 3 kV(Um=3,6 kV)1)IEC 60811-1-1:1993,Common test methods for insulating and sheathing materials of electriccables Part 1:Methods for general application Section 1:Measurement of thickness andoverall dimensions-Tests for determining the mechanical propertiesIEC 60811-1-2:1985,Common test methods for insulating and sheathing materials of electriccables-Part 1:Methods for general application-Section 2:Thermal ageing methodsIEC 60811-1-3:1993.Common test methods for insulating and sheathing materials of electriccables-Part 1:Methods for general application Section 3:Methods for determining thedensity-Water absorption tests-Shrinkage test60502-21EC:1997-9-IEC 60811-1-4:1985,Common test methods for insulating and sheathing materials of electriccables-Part 1:Methods for general application-Section 4:Tests at low temperatureIEC 60811-2-1:1986.Common test methods for insulating and sheathing materials of electriccables-Part 2:Methods specific to elastomeric compounds-Section 1:Ozone resistance test-Hot set test-Mineral oil immersion testIEC 60811-3-1:1985,Common test methods for insulating and sheathing materials of electriccables-Part 3:Methods specific to PVC compounds Section 1:Pressure test at hightemperature-Tests for resistance to crackingIEC 60811-3-2:1985,Common test methods for insulating and sheathing materials of electriccables-Part 3:Methods specific to PVC compounds-Section 2:Loss of mass test-Thermalstability testIEC 60811-4-1:1985,Common test methods for insulating and sheathing materials of electriccables Part 4:Methods specific to polyethylene and polypropylene compounds Section 1:Resistance to environmental stress cracking Wrapping test after thermal ageing in airMeasurement of the melt flow index-Carbon black and/or mineral content measurement in PEIEC 60885-2:1987,Electrical test methods for electric cables-Part 2:Partial discharge testsIEC 60885-3:1988.Electrical test methods for electric cables-Part 3:Test methods for partialdischarge measurements on lengths of extruded power cablesIEC 60986:1989.Guide to the short-circuit temperature limits of electric cables with a ratedvoltage from 1,8/3(3,6)kV to 18/30(36)kVISO 48:1994,Rubber,vulcanized or thermoplastic Determination of hardness(hardnessbetween 10 IRHD and 100 IRHD)3 DefinitionsFor the purpose of this part of IEC 60502,the following definitions apply.3.1 Definitions of dimensional values(thicknesses,cross-sections,etc.)3.1.1 nominal value:Value by which a quantity is designated and which is often used intables.Usually,in this standard,nominal values give rise to values to be checked bymeasurements taking into account specified tolerances.3.1.2 approximate value:Value which is neither guaranteed nor checked;it is used,forexample,for the calculation of other dimensional values.3.1.3 median value:When several test results have been obtained and ordered in anincreasing(or decreasing)succession,the median value is the middle value if the number ofavailable values is odd,and the mean of the two middle values if the number is even.3.1.4 fictitious value:Value calculated according to the fictitious methoddescribed inannex A.3.2 Definitions concerning the tests3.2.1 routine tests:Tests made by the manufacturer on each manufactured length of cableto check that each length meets the specified requirements.