1、Designation: D2802 03 (Reapproved 2010)D2802 14Standard 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 adoption or, in the
2、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 U.S. Department of Defense.1. Scope Scope
3、*1.1 This specification covers an ozone-resisting crosslinked rubber insulation compound for electrical wires and cables. Thepolymer shall consist substantially of ethylene-alkene copolymer (EAM) or ethylene-alkene diene terpolymer (EADM). Thispolymer type includes ethylenepropylene copolymer (EPM)
4、and ethylenepropylene diene terpolymer (EPDM).1.2 This type of insulation is considered suitable for use on wire or cable which will be used in wet and dry locations withconductor temperatures up to 90C during continuous operation, to 130C during emergency overload conditions, and to 250Cduring shor
5、t-circuit conditions. It is considered suitable for all sizes and voltage classifications of single- and multiple-conductorpower cables up to 35 000 V 35 000 V phase-to-phase at the 100 % insulation level and up to 25 000 V 25 000 V at the 133 %insulation level as listed in Table 1D, Conductor Sizes
6、, Insulation Thicknesses, Test Voltages, and Corona Extinction Levels forEthylene-Propylene Rubber Insulation, Table 1D of Test Methods D470. Single-conductor cables shall have a supplementarycovering over the insulation, and multiple-conductor cables shall have an overall covering.1.3 Whenever two
7、sets of values are presented, in different units, 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 be tested unless it has been formed around a conductor or cable. Therefore,tests are done on insulat
8、ed wire or cable in this specification solely to determine the relevant property of the insulation and notto test the conductor or completed cable.2. Referenced Documents2.1 ASTM Standards:2D470 Test Methods for Crosslinked Insulations and Jackets for Wire and CableD1711 Terminology Relating to Elec
9、trical Insulation2.2 ICEA Standard:3T-24-380 Guide for Partial Discharge Procedure3. Terminology3.1 Definitions: DefinitionsFor definitions of terms used in this specification, refer to Terminology D1711.3.2 Definitions of Terms Specific to This Standard:3.2.1 aging (act of), nvexposure of materials
10、 to air at a temperature of 121C for 168 h.4. Physical Properties4.1 The crosslinked insulation shall conform to the requirements for physical properties specified in Table 1.1 This specification is under the jurisdiction of ASTM Committee D09 on Electrical and Electronic Insulating Materials and is
11、 the direct responsibility of SubcommitteeD09.18 on Solid Insulations, Non-Metallic Shieldings and Coverings for Electrical and Telecommunication Wires and Cables. Members of ASTM Committees D02 onPetroleum Products and Lubricants, and B07 on Light Metals and Alloys, have contributed to this specifi
12、cation.Current edition approved Oct. 1, 2010Nov. 1, 2014. Published October 2010November 2014. Originally approved in 1970. Last previous edition approved in 20032010as D2802 03.D2802 03 (2010). DOI: 10.1520/D2802-03R10.10.1520/D2802-14.2 For referencedASTM standards, visit theASTM website, www.astm
13、.org, or contactASTM Customer Service at serviceastm.org. ForAnnual Book ofASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 Available from the Insulated Cable Engineers Assn., P.O. Box 440, S. Yarmouth, MA 02664.This document is not an ASTM standar
14、d and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases o
15、nly the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14.2 The values spec
16、ified in Table 1 are applicable only to insulation having a nominal wall thickness of 0.030 in. (0.76 mm)(0.76 mm) or greater.5. Electrical Requirements5.1 Order of TestingPerform the ac voltage withstand, insulation resistance, and dc voltage withstand tests in that order whenany of these tests are
17、 required. The sequence for other testing is not specified.5.2 AC Voltage Withstand TestEach insulated conductor in the completed cable shall withstand for 5 min the ac test voltageshown in Table 1D, Conductor Sizes, Insulation Thicknesses, Test Voltages, and Corona Extinction Levels for Ethylene-Pr
18、opyleneRubber Insulation, Table 1D of Test Methods D470, except that for . For nonshielded conductors rated 5000 V or less, use thiswithstand test, or use as an acceptable substitute (see the dc test voltage described in 5.5 may be substituted.).5.3 Insulation Resistance:5.3.1 Each insulated conduct
19、or in the completed cable shall have an insulation resistance value of not less than thatcorresponding to a constant of 20 000 M-1000 ft at 15.6C. When the temperature of the water in which the insulation is testeddiffers from 15.6C, the measured value obtained shall be multiplied by the proper corr
20、ection factor from Table 2, TemperatureCorrection Factors for Insulation Resistance at 60 F, Table 2 of Test Methods D470. Use the coefficient supplied by themanufacturer for this particular compound or determine the coefficient as described by Test Methods D470, Section 35,Determining Temperature C
21、oefficient for Insulation Resistance.35.5.3.2 Where a nonconducting separator is applied between the conductor and insulation, or where an insulated conductor iscovered with a nonmetallic sheath so that the insulation resistance can be measured only on the complete assembly, the requiredinsulation r
22、esistance shall be not less than 60 % of that required for the primary insulation based on the thickness of that insulation.5.4 DC Voltage Withstand Test for Cables Rated at 5001 V and AboveUpon completion of the insulation resistance test, eachinsulated conductor in the completed cable rated for se
23、rvice at 5001 V and above shall withstand for 15 min the dc test voltageshown in Table 1D, Conductor Sizes, Insulation Thicknesses, Test Voltages, and Corona Extinction Levels for Ethylene-PropyleneRubber Insulation, Table 1D of Test Methods D470.5.5 DC Voltage Withstand Test for Cables Rated at 500
24、0 V and LessUpon completion of the insulation resistance test, eachnon-shielded insulated conductor in the completed cable rated up to 5000 V shall withstand for 5 min the dc test voltage shownin Table 1D, Conductor Sizes, Insulation Thicknesses, Test Voltages, and Corona Extinction Levels for Ethyl
25、ene-Propylene RubberInsulation, Table 1D of Test Methods D470, unless the ac voltage test described in 5.2 is performed.5.6 Capacitance and Dissipation FactorAfter 24-h24 h immersion in water at room temperature, a specimen of the insulatedconductor rated for service at 5001 V and above shall be tes
26、ted for capacitance and dissipation factor with suitable 60-Hzequipment, and shall have a permittivity not exceeding 4.0 and dissipation factor not exceeding 0.02. The measurements shall bemade at the rated voltage to ground of the cable under test.5.7 Partial Discharge (Corona) Level Test:5.7.1 Eac
27、h length of completed shielded cable rated for service at 2001 V and above shall comply with the minimum partialdischarge (corona) level specified in Table 2 when tested in accordance with ICEA T-24-380.5.7.2 Unless otherwise specified, the cable will be rated at 100 % insulation level.6. Accelerate
28、d Water Absorption6.1 The insulation shall conform to the requirements shown in Table 3. The Electrical Method tests shall be conducted at 60Hz 60 Hz with a water temperature of 75 6 1C.7. Ozone Resistance7.1 The insulation shall show no visible cracking after exposure for 3 h to an ozone concentrat
29、ion between 0.025 and 0.030,%, volume, when tested in accordance with Test Methods D470.TABLE 1 Physical Property Requirements for Ozone-Resistant-Type EAM or EADM InsulationPhysical Requirements (original):Tensile strength, min, psi (MPa)Elongation at rupture, min, %700 (4.8)250Physical Requirement
30、s (after aging in anair-oven at 121 1C for 168 h):Tensile strength, min, % of unaged value 75Elongation at rupture, min, % of unaged value 7575D2802 1428. Sampling8.1 Sample the insulation in accordance with Test Methods D470.9. Test Method9.1 Test the insulation in accordance with Test Methods D470
31、.10. Keywords10.1 AC ac voltage withstand test; accelerated water absorption; DC dc voltage withstand test; ethylene-propylene rubber;insulation resistance; ozone resistingTABLE 2 Minimum Partial Discharge (Corona) Level forCompleted Power CableRated Circuit Voltage, Phase-to-Phase, VMinimum Partial
32、 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 to 35 000 26.0 .D2802 143SUMMARY OF CHANGESCommittee D09 has identified the location of selected
33、 changes to this standard since the last issue (D2802 03(2010) that may impact the use of this standard. (Approved Nov. 1, 2014.)(1) Revised subsections 5.2 and 5.6.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this
34、 standard. Users of this standard are expressly advised that determination of the validity of any such patent 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
35、reviewed every five years andif not revised, either reapproved or withdrawn.Your comments are invited either 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 therespon
36、sible technical committee, which you may attend. If you feel that your comments have not received a fair hearing 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
37、 Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard 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 right
38、s to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 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 0.5D2802 144
