ASTM D1351-2008 Standard Specification for Thermoplastic Polyethylene Insulation for Electrical Wire and Cable《电线和电缆用热塑性聚乙烯绝缘材料的标准规范》.pdf
《ASTM D1351-2008 Standard Specification for Thermoplastic Polyethylene Insulation for Electrical Wire and Cable《电线和电缆用热塑性聚乙烯绝缘材料的标准规范》.pdf》由会员分享,可在线阅读,更多相关《ASTM D1351-2008 Standard Specification for Thermoplastic Polyethylene Insulation for Electrical Wire and Cable《电线和电缆用热塑性聚乙烯绝缘材料的标准规范》.pdf(4页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D 1351 08An American National StandardStandard Specification forThermoplastic Polyethylene Insulation for Electrical Wireand Cable1This standard is issued under the fixed designation D 1351; the number immediately following the designation indicates the year oforiginal adoption or, in t
2、he 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.1. Scope*1.1 This specification covers a thermoplastic insulationwhich consists substantially of
3、 polyethylene.1.2 This type of insulation is considered suitable for use onwire or cable that will be used for continuous operation atconductor temperatures up to 75 C with a maximum conduc-tor size of 1000 kcmil (507 mm2). The maximum voltage ratingshall not exceed 35 000 V for power application or
4、 9 000 V forseries lighting.1.3 In many instances the insulation material cannot betested unless it has been formed around a conductor. Therefore,tests done on insulated wire or cable in this specification aresolely to determine the relevant property of the insulationmaterial and not to test the ins
5、ulated conductor or completedcable.1.4 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.2. Referenced Documents2.1 ASTM Standards:2D 1248 Specification for Polyethylene Plastics ExtrusionMat
6、erials for Wire and CableD 1711 Terminology Relating to Electrical InsulationD 2308 Specification for Thermoplastic PolyethyleneJacket for Electrical Wire and CableD 2633 Test Methods for Thermoplastic Insulations andJackets for Wire and CableD 3349 Test Method for Absorption Coefficient of Ethylene
7、Polymer Material Pigmented with Carbon Black2.2 ICEA Standard:T-24-380 Guide for Partial-Discharge Procedure33. Terminology3.1 Definitions:3.1.1 Refer to Terminology D 1711 for definitions of termsused in this specification.3.2 Definition of Term Specific to This Standard:3.2.1 aging (act of), nexpo
8、sure of materials to air at atemperature of 100 C for 48 h.4. Conductor Shields4.1 Conductor shields shall be used on solid and strandedconductors of power cables having rated circuit voltages above2000 V. This requirement does not apply to series lightingcables. Conductor shielding is conducting ma
9、terial at least0.0025 in. (0.06 mm) thick applied over the surface of theconductor. The options include conducting nonmetallic tape,conducting compound, or conducting cement.5. Physical Properties5.1 The polyethylene, before application to the conductor,shall comply with the requirements of Specific
10、ation D 1248 forType I; Class A, B or C; Category 4 or 5; Grade E4 or E5. Therequirements of Specification D 1248 do not apply to insula-tion removed from the conductor.5.2 Insulation exposed to sunlight or weather requiresSpecification D 1248, Class C compound or suitable protectivecoverings. Class
11、 C compound shall meet the minimum absorp-tion coefficient requirement in Table 1.5.3 Specimens removed from the wire or cable and tested at20 to 30 C (68 to 80 F) shall conform to the requirements forphysical properties specified in Table 1. Alternatively, theinsulation shall be air-oven aged witho
12、ut removal from theconductor.5.4 Thickness of InsulationThe minimum average insula-tion thickness shall be as specified in Table 2 or Table 3 of thisspecification. The minimum thickness shall be at least 90 % ofthe specified minimum average thickness.1This specification is under the jurisdiction of
13、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 edition approved Jan. 1, 2008. Published February 2008.
14、Originallyapproved in 1954. Last previous edition approved in 2002 as D 1351-02.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page
15、onthe ASTM website.3Available from The Insulated Cable Engineers Association, Inc. (ICEA), P.O.Box 1568, Carrollton, GA 30112, http:/.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,
16、 United States.5.5 Absorption CoeffcientTest according to Test MethodD 3349. Alternatively, a certification by the manufacturer ofthe polyethylene compound that the requirement has beencomplied with shall suffice.6. Electrical Requirements Electrical Requirements6.1 Order of TestingPerform the parti
17、al discharge, acvoltage, insulation resistance, and dc voltage tests in that orderwhen any of these tests are specified. The sequence of othertesting is not specified.6.2 Partial DischargeWhen tested in accordance withICEA T-24-380, as modified in Test Methods D 2633, eachlength of completed shielde
18、d power cable rated for service at2001 V and above shall comply with the minimum partialdischarge extinction level. See Test Methods D 2633.6.3 AC Voltage TestThe insulated conductor shall with-stand the ac voltage specified in Table 2 or Table 3 for 5 min.Unless otherwise specified, this test shall
19、 be omitted fornonshielded conductors rated up to 5000 V if the dc voltagetest described in 6.6 is performed.6.4 Insulation ResistanceThe insulated conductor shallhave an insulation-resistance value equal to or greater than thatcorresponding to a constant of 50 000 MV-1000 ft at 60 F(15.6 C). When t
20、he temperature of the water in which theinsulation is tested differs from 60 F, a correction factor mustbe applied. Table 1 of Test Methods D 2633 contains thecorrection factors. Each insulation or cable manufacturer canfurnish the 1 F coefficient for their insulation material byusing the procedure
21、given in Test Methods D 2633. Multiplythe measured value by the correction factor to obtain theinsulation resistance value corrected to 60 F.6.5 DC Voltage Test (Cables Rated at 5001 V and Above)Upon completion of the insulation resistance test, each lengthof insulated power cable rated for service
22、at 5001 V and overshall withstand for 15 min the dc test voltage given in Table 2or Table 3.6.6 DC Voltage Test (Cables Rated at 5000 V or Less)Upon completion of the insulation resistance test, each non-shielded conductor rated up to 5000 V shall withstand for 5min the dc test voltage given in Tabl
23、e 2 or Table 3. Unlessotherwise specified, it is acceptable to omit this test fornonshielded conductors rated up to 5000 V if the ac voltage testdescribed in 6.3 has been performed.7. Keywords7.1 cable; conductor; electrical; insulation; polyethylene;thermoplastic; wireTABLE 1 Physical Properties of
24、 CompoundUnaged Requirements:Tensile strength, min, psi (MPa) 1400 (9.7)Elongation at rupture, min, % 350Aged Requirements:After air oven aging at 100 6 1 C for 48 h:Tensile strength, % retention, min 75Elongation at rupture, % retention, min 75Absorption Coefficient, min, absorbance/nm 320D1351082T
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