1、Designation: D2802 03 (Reapproved 2010)An American National StandardStandard Specification forOzone-Resistant Ethylene-Alkene Polymer Insulationfor Wire and Cable1This standard is issued under the fixed designation D2802; the number immediately following the designation indicates the year oforiginal
2、 adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defens
3、e.1. Scope1.1 This specification covers an ozone-resisting crosslinkedrubber insulation compound for electrical wires and cables.The polymer shall consist substantially of ethylene-alkenecopolymer (EAM) or ethylene-alkene diene terpolymer(EADM). This polymer type includes ethylenepropylene co-polyme
4、r (EPM) and ethylenepropylene diene terpolymer(EPDM).1.2 This type of insulation is considered suitable for use onwire or cable which will be used in wet and dry locations withconductor temperatures up to 90C during continuous opera-tion, to 130C during emergency overload conditions, and to250C duri
5、ng short-circuit conditions. It is considered suitablefor all sizes and voltage classifications of single- and multiple-conductor power cables up to 35 000 V phase-to-phase at the100 % insulation level and up to 25 000 V at the 133 %insulation level as listed in Table 1D, Conductor Sizes, Insu-latio
6、n Thicknesses, Test Voltages, and Corona ExtinctionLevels for Ethylene-Propylene Rubber Insulation, of TestMethods D470. Single-conductor cables shall have a supple-mentary covering over the insulation, and multiple-conductorcables shall have an overall covering.1.3 Whenever two sets of values are p
7、resented, 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 material cannot betested unless it has been formed around a conductor or cable.Therefore, tests are done on insulated wire or cable in th
8、isspecification solely to determine the relevant property of theinsulation and not to test the conductor or completed cable.2. Referenced Documents2.1 ASTM Standards:2D470 Test Methods for Crosslinked Insulations and Jacketsfor Wire and CableD1711 Terminology Relating to Electrical Insulation2.2 ICE
9、A Standard:T-24-380 Guide for Partial Discharge Procedure33. Terminology3.1 Definitions: For definitions of terms used in this speci-fication, refer to Terminology D1711.3.2 Definition of Term Specific to This Standard:3.2.1 aging (act of), nexposure of materials to air at atemperature of 121C for 1
10、68 h.4. Physical Properties4.1 The crosslinked insulation shall conform to the require-ments for physical properties specified in Table 1.4.2 The values specified in Table 1 are applicable only toinsulation having a nominal wall thickness of 0.030 in. (0.76mm) or greater.5. Electrical Requirements5.
11、1 Order of TestingPerform the ac voltage withstand,insulation resistance, and dc voltage withstand tests in thatorder when any of these tests are required. The sequence forother testing is not specified.5.2 AC Voltage Withstand TestEach insulated conductorin the completed cable shall withstand for 5
12、 min the ac testvoltage shown in Table 1D, Conductor Sizes, Insulation Thick-nesses, Test Voltages, and Corona Extinction Levels forEthylene-Propylene Rubber Insulation, of Test Methods D470,1This specification is under the jurisdiction of ASTM Committee D09 onElectrical and Electronic Insulating Ma
13、terials and is the direct responsibility ofSubcommittee D09.18 on Solid Insulations, Non-Metallic Shieldings and Coveringsfor Electrical and Telecommunication Wires and Cables. Members of ASTMCommittees D02 on Petroleum Products and Lubricants, and B07 on Light Metalsand Alloys, have contributed to
14、this specification.Current edition approved Oct. 1, 2010. Published October 2010. Originallyapproved in 1970. Last previous edition approved in 2003 as D2802 03. DOI:10.1520/D2802-03R10.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceas
15、tm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from the Insulated Cable Engineers Assn., P.O. Box 440, S.Yarmouth, MA 02664.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, P
16、A 19428-2959, United States.except that for nonshielded conductors rated 5000 V or less, thedc test voltage described in 5.5 may be substituted.5.3 Insulation Resistance:5.3.1 Each insulated conductor in the completed cable shallhave an insulation resistance value of not less than thatcorresponding
17、to a constant of 20 000 MV-1000 ft at 15.6C.When the temperature of the water in which the insulation istested differs from 15.6C, the measured value obtained shallbe multiplied by the proper correction factor from Table 2,Temperature Correction Factors for Insulation Resistance at60 F, of Test Meth
18、ods D470. Use the coefficient supplied bythe manufacturer for this particular compound or determine thecoefficient as described by Test Methods D470, Section 35,Determining Temperature Coefficient for Insulation Resis-tance.5.3.2 Where a nonconducting separator is applied betweenthe conductor and in
19、sulation, or where an insulated conductoris covered with a nonmetallic sheath so that the insulationresistance can be measured only on the complete assembly, therequired insulation resistance shall be not less than 60 % of thatrequired for the primary insulation based on the thickness ofthat insulat
20、ion.5.4 DC Voltage Withstand Test for Cables Rated at 5001 Vand AboveUpon completion of the insulation resistance test,each insulated conductor in the completed cable rated forservice at 5001 V and above shall withstand for 15 min the dctest voltage shown in Table 1D, Conductor Sizes, InsulationThic
21、knesses, Test Voltages, and Corona Extinction Levels forEthylene-Propylene Rubber Insulation, of Test Methods D470.5.5 DC Voltage Withstand Test for Cables Rated at 5000 Vand LessUpon completion of the insulation resistance test,each non-shielded insulated conductor in the completed cablerated up to
22、 5000 V shall withstand for 5 min the dc test voltageshown in Table 1D, Conductor Sizes, Insulation Thicknesses,Test Voltages, and Corona Extinction Levels for Ethylene-Propylene Rubber Insulation, of Test Methods D470 unless theac voltage test described in 5.2 is performed.5.6 Capacitance and Dissi
23、pation FactorAfter 24-h im-mersion in water at room temperature, a specimen of theinsulated conductor rated for service at 5001 V and above shallbe tested for capacitance and dissipation factor with suitable60-Hz equipment, and shall have a permittivity not exceeding4.0 and dissipation factor not ex
24、ceeding 0.02. The measure-ments shall be made at the rated voltage to ground of the cableunder test.5.7 Partial Discharge (Corona) Level Test:5.7.1 Each length of completed shielded cable rated forservice at 2001 V and above shall comply with the minimumpartial discharge (corona) level specified in
25、Table 2 when testedin accordance with ICEA T-24-380.5.7.2 Unless otherwise specified, the cable will be rated at100 % insulation level.6. Accelerated Water Absorption6.1 The insulation shall conform to the requirements shownin Table 3. The Electrical Method tests shall be conducted at 60Hz with a wa
26、ter temperature of 75 6 1C.7. Ozone Resistance7.1 The insulation shall show no visible cracking afterexposure for 3 h to an ozone concentration between 0.025 and0.030, %, volume, when tested in accordance with TestMethods D470.8. Sampling8.1 Sample the insulation in accordance with Test MethodsD470.
27、9. Test Method9.1 Test the insulation in accordance with Test MethodsD470.10. Keywords10.1 AC voltage withstand test; accelerated water absorp-tion; DC voltage withstand test; ethylene-propylene rubber;insulation resistance; ozone resistingTABLE 1 Physical Property Requirements for Ozone-Resistant-T
28、ype EAM or EADM InsulationPhysical Requirements (original):Tensile strength, min, psi (MPa)Elongation at rupture, min, %700 (4.8)250Physical Requirements (after aging in anair-oven at 121 6 1C for 168 h):Tensile strength, min, % of unaged valueElongation at rupture, min, % of unaged value 7575TABLE
29、2 Minimum Partial Discharge (Corona) Level forCompleted Power CableRated Circuit Voltage, Phase-to-Phase, VMinimum Partial Discharge(Corona) ExtinctionLevel, kV100 % Insu-lation Level133 % Insu-lation Level2001 to 5000 4.0 5.05001 to 8000 6.0 8.08001 to 15 000 11.0 15.015 001 to 25 000 19.0 26.025 0
30、01 to 28 000 21.0 .28 001 to 35 000 26.0 .D2802 03 (2010)2ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such pate
31、nt rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited eith
32、er for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair h
33、earing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standa
34、rd may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).TABLE 3 Ac
35、celerated Water Absorption Test RequirementsElectrical Method:Permittivity, max after 24-h immersion, testedat 80 V/mil (3.1 kV/mm) 4.0Capacitance increase, max, %1 to 14 days 3.57 to 14 days 1.5Stability factor after 14 days, max 1.0Alternate to stability factor, 1 to 14 days, max 0.5D2802 03 (2010)3
