1、Designation:D 1352 02An American National StandardStandard Specification forOzone-Resisting Butyl Rubber Insulation for Wire andCable1This standard is issued under the fixed designation D 1352;the number immediately following the designation indicates the year oforiginal adoption or,in the case of r
2、evision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers an ozone-resisting crosslinkedrubber insulating compound for electrical wire
3、s and cables.The polymer consists substantially of butyl rubber.1.2 This type of insulation is considered suitable for use atnot more than 15 000 V between phases at an insulation levelof 133%or 28 000 V between phases at an insulation level of100%.The conductor temperature shall not exceed 85C fora
4、n operating voltage of 15 000 V or less,and shall not exceed80C for an operating voltage above 15 000 V.1.3 Whenever two sets of values are presented,in differentunits,the values in the first set are the standard,while those inparentheses are for information only.1.4 In many instances the insulation
5、 material cannot betested unless it has been formed around a conductor or cable.Therefore,tests are done on insulated wire or cable in thisdocument solely to determine the relevant property of theinsulation material and not to test the insulated conductor orcompleted cable.2.Referenced Documents2.1
6、ASTM Standards:D 470 Test Methods for Crosslinked Insulations and Jacketsfor Wire and Cable2D 1711 Terminology Relating to Electrical Insulation22.2ICEA Standard:T-24-380 Guide for Partial-Discharge Procedure33.Terminology3.1 Definitions:For definitions of terms used in this speci-fication,refer to
7、Terminology D 1711.3.1.1 aging,(act of)nexposure of materials to air at100C for 168 h.4.Physical Properties4.1 Requirements for physical properties are listed in Table1.4.2 Thickness of InsulationTable number 1A(ConductorSizes,Insulation Thicknesses and AC Test Voltages for RubberInsulations)of Test
8、 Methods D 470 lists the average thicknessfor the insulation.The required minimum thickness is at least90%of that given in Table number 1A(Conductor Sizes,Insulation Thicknesses and AC Test Voltages for RubberInsulations)of Test Methods D 470.5.Ozone Resistance5.1 The insulation shall show no visibl
9、e cracking afterexposure for 3 h to an ozone concentration of not less than0.025 nor more than 0.030%by volume,when tested inaccordance with Test Methods D 470.6.Accelerated Water Absorption6.1 The insulated conductors insulation shall meet therequirements given in Table 2.Conduct the Electrical Met
10、hodtests in accordance with Test Methods D 470 at 60 Hz with awater temperature of 75 6 1C.7.Electrical Requirements7.1 Order of TestingPerform the partial discharge,acvoltage,insulation resistance,and dc voltage tests in that orderwhen any of these tests are specified.The capacitance anddissipation
11、 factor tests are run on a separate sample.Thesequence of other testing is not specified.7.2 Partial Discharge(Corona)Level When tested inaccordance with ICEA T-24-380 as modified in Test MethodsD 470,each length of completed power cable rated for serviceat 2001 V and above with insulation shielding
12、 on the individualconductors shall meet the minimum requirements given inTable 3.7.3 AC Voltage TestTest each insulated conductor for 5min at the ac withstand test voltage given in Table number 1A(Conductor Sizes,Insulation Thicknesses andAC Test VoltagesFor Rubber Insulations)of Test Methods D 470
13、under the1This specification is under the jurisdiction of ASTM Committee D09 onElectrical and Electronic Insulating Materials and is the direct responsibility ofSubcommittee D09.18 on Solid Insulations,Non-Metallic Shieldings and Coveringsfor Electrical and Telecommunication Wires and Cables.Current
14、 edition approved Sept.10,2002.Published November 2002.Originallypublished as D 1352 54 T.Last previous edition D 1352 97.2Annual Book of ASTM Standards,Vol 10.01.3Available from the Insulated Cable Engineers Assoc.,P.O.Box 440,SouthYarmouth,MA 02664.1Copyright ASTM International,100 Barr Harbor Dri
15、ve,PO Box C700,West Conshohocken,PA 19428-2959,United States.columns labelled“Ozone-Resisting Insulations.”Unless other-wise specified,omit this test for nonshielded conductors ratedup to 5000 V if the dc voltage test described in 7.6 is to beperformed.7.4 Insulation Resistance:7.4.1 The insulated c
16、onductor shall have an insulationresistance value of at least that which corresponds to a constantof 20 000 MV-1000 ft at 60F(15.6C).7.4.2 If the temperature at the time measurement was madediffers from 60F(15.6C),correct the insulation resistance to60F.Table 2(Temperature Correction for Insulation Resis-tance at 60F)of Test Methods D 470 contains the correctionfactors.Each insulation manufacturer can furnish the 1Fcoefficient for the insulation material by using the proceduregiven in Test Metho
