1、Designation: D 2802 03An American National StandardStandard Specification forOzone-Resistant Ethylene-Alkene Polymer Insulationfor Wire and Cable1This standard is issued under the fixed designation D 2802; the number immediately following the designation indicates the year oforiginal adoption or, in
2、 the case of revision, 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.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 T
3、his 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-polymer (EPM) and eth
4、ylenepropylene 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 during short-circui
5、t 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-lation Thicknesses,
6、Test Voltages, and Corona ExtinctionLevels for Ethylene-Propylene Rubber Insulation, of TestMethods D 470. 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 presented, in d
7、ifferentunits, 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 thisspecificatio
8、n solely to determine the relevant property of theinsulation and not to test the conductor or completed cable.2. Referenced Documents2.1 ASTM Standards:2D 470 Test Methods for Crosslinked Insulations and Jacketsfor Wire and CableD 1711 Terminology Relating to Electrical Insulation2.2 ICEA Standard:T
9、-24-380 Guide for Partial Discharge Procedure33. Terminology3.1 Definitions: For definitions of terms used in this speci-fication, refer to Terminology D 1711.3.2 Definition of Term Specific to This Standard:3.2.1 aging (act of), nexposure of materials to air at atemperature of 121C for 168 h.4. Phy
10、sical 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 Requirements5.1 Order of
11、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 min the ac
12、 testvoltage shown in Table 1D, Conductor Sizes, Insulation Thick-nesses, Test Voltages, and Corona Extinction Levels forEthylene-Propylene Rubber Insulation, of Test Methods D 470,1This specification is under the jurisdiction of ASTM Committee D09 onElectrical and Electronic Insulating Materials an
13、d 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 this speci
14、fication.Current edition approved Oct. 1, 2003. Published October 2003. Originallyapproved in 1970. Last previous edition approved in 1998 as D 2802 98.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMSta
15、ndards 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, PA 19428-2959, United States.except
16、 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 to a constant of 20 000 MV-1000 ft
17、 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 Methods D 470. Use the coefficient sup
18、plied bythe manufacturer for this particular compound or determine thecoefficient as described by Test Methods D 470, Section 35,Determining Temperature Coefficient for Insulation Resis-tance.5.3.2 Where a nonconducting separator is applied betweenthe conductor and insulation, or where an insulated
19、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 insulation.5.4 DC Voltage Withstand Tes
20、t 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, InsulationThicknesses, Test Voltages, and Coro
21、na Extinction Levels forEthylene-Propylene Rubber Insulation, of Test Methods D 470.5.5 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 5000 V shall withstand for 5 m
22、in 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 D 470 unless theac voltage test described in 5.2 is performed.5.6 Capacitance and Dissipation FactorAfter 24-h im-mer
23、sion 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 exceeding 0.02. The measure-ment
24、s 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 Table 2 when testedin accordan
25、ce 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 water temperature of 75 6 1C.7.
26、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 D 470.8. Sampling8.1 Sample the insulation in accordance with Test MethodsD 470.9. Test Method9.1 Test the i
27、nsulation in accordance with Test MethodsD 470.10. 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-Type EAM or EADM InsulationP
28、hysical 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 2 Minimum Partial Discharge
29、 (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 26.025 001 to 28 000 21.0 .28 001 t
30、o 35 000 26.0 .D2802032ASTM 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 patent rights, and the riskof infringem
31、ent 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 either for revision of this standard or
32、 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 hearing you shouldmake your views kn
33、own 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 standard may be obtained by contacting AS
34、TM 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).TABLE 3 Accelerated 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 0.5D2802033
