1、Designation: D 2655 00 (Reapproved 2006)An American National StandardStandard Specification forCrosslinked Polyethylene Insulation for Wire and CableRated 0 to 2000 V1This standard is issued under the fixed designation D 2655; the number immediately following the designation indicates the year ofori
2、ginal adoption or, in 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.1. Scope1.1 This specification covers a crosslinked polyethyleneinsulatio
3、n for electrical wires and cables in conductor sizes 14AWG 2.08 mm2 and larger. The base polymer of thisinsulation consists substantially of polyethylene or a polyeth-ylene copolymer.1.2 This type of insulation is suitable for continuous use onpower cables in wet and dry locations, for voltage ratin
4、gs notexceeding 2000 V and at conductor temperatures not exceeding90 C for normal operation. For copper conductors, theinsulation may be applied over the uncoated metal.1.3 Materials covered by this specification are not sunlightand weather resistant unless they are carbon black pigmentedor contain
5、an additive system designed for this protection.1.4 In many instances the insulation cannot be tested unlessit has been formed around a conductor. Therefore, tests aredone on insulated wire in this standard solely to determine therelevant property of the insulation and not to test the conductoror co
6、mpleted cable.1.5 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 470 Test Methods for Crosslinked Insulations and Jacketsfor Wire and CableD 12
7、48 Specification for Polyethylene Plastics ExtrusionMaterials for Wire and CableD 1711 Terminology Relating to Electrical InsulationD 2765 Test Methods for Determination of Gel Content andSwell Ratio of Crosslinked Ethylene Plastics2.2 ICEA Standard:ICEAT-28-562 Test Method for Measurement of Hot Cr
8、eepof Polymeric Insulations33. Terminology3.1 Definitions:3.1.1 For definitions of terms used in this specification referto Terminology D 1711.3.2 Definitions of Terms Specific to This Standard:3.2.1 aging (act of), nexposure of materials to air at 121C for 168 h.4. Physical Properties4.1 The requir
9、ements for the insulation are listed in Table 1.5. Electrical Requirements5.1 Order of TestingPerform the ac voltage, insulationresistance, and dc voltage tests in that order when any of thesetests are required. The sequence for other testing is notspecified.5.2 AC Voltage TestSubject wires and cabl
10、es to an ac testvoltage for a period of 5 min. Unless otherwise specified, omitthis test if the dc voltage test described in 5.4 is to beperformed. Test at a voltage of 100 V/mil 4 kV/mm based onthe specified nominal thickness of insulation for the ratedcircuit voltage, phase to phase. Conduct the t
11、ests in accordancewith Test Methods D 470.5.3 Insulation ResistanceThe insulated conductor shallhave an insulation resistance equal to or greater than thatcorresponding to a constant of 10 000 at 60 F 15.6 C.When the temperature of the water in which the insulation istested differs from 60 F, apply
12、a correction factor. Table 2 ofTest Methods D 470 contains the correction factors. Eachinsulation manufacturer can furnish the 1 F coefficient for theinsulation material by using the procedure given in TestMethods D 470. Multiply the measured value by the correctionfactor to obtain the insulation-re
13、sistance value corrected to 60F.5.3.1 Where a nonconducting separator is applied betweenthe conductor and insulation or where an insulated conductor is1This specification is under the jurisdiction of ASTM Committee D09 onElectrical and Electronic Insulating Materials and is the direct responsibility
14、 ofSubcommittee D09.18 on Solid Insulations, Non-Metallic Shieldings, and Cover-ings for Electrical and Telecommunications Wires and Cables.Current edition approved April 1, 2006. Published April 2006. Originallyapproved in 1967. Last previous edition approved in 2000 as D 2655 00.2For referenced AS
15、TM 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 onthe ASTM website.3Available from Insulated Cable Engineers Association, P. O. Box 440, SouthYarm
16、outh, MA 02664 or Global Engineering Documents, 15 Inverness Way East,Englewood, CO 80112.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.covered with a nonmetallic jacket so that the insulationresistance can be measured only on the
17、completed assembly,the required insulation resistance shall be at least 60 % of thatrequired for the primary insulation based on the nominalthickness of that insulation.5.4 DC Voltage TestUpon completion of the insulationresistance test, each unshielded insulated conductor shallwithstand for 5 min a
18、 dc test voltage which is three times theac test voltage specified in 5.2. Unless otherwise specified,omit this test if the ac voltage test described in 5.2 has beenperformed.5.5 Accelerated Water Absorption RequirementsThe insu-lation shall meet the requirements of Table 2 when tested inaccordance
19、with theAccelerated WaterAbsorption Tests in TestMethods D 470. Conduct the Electrical Method Test at 60 Hzwith the water temperature at 75 6 1 C.6. Heat Distortion6.1 The requirements for heat distortion are given in Table1 of this specification. The test is conducted in accordance withTest Methods
20、 D 470.7. Percent Hot Creep and Percent Hot Set7.1 Determine the percent hot creep for 15 min at 150 C302 F as follows: Meet the filled or unfilled values specifiedin Table 1. Conduct this test in accordance with Practice ICEAT-28-562.7.2 Determine the percent hot set for 5 min at 150 C 302F as foll
21、ows: Meet the filled or unfilled values specified inTable 1. Conduct this test in accordance with Practice ICEAT-28-562.7.3 In case of dispute, the solvent extraction test in TestMethod D 2765 is to be the referee method. The extractables,after a drying time of 20 h, shall be no more than 30 percent
22、.8. Test Applicable for Sunlight and Weather ResistantMaterials8.1 For insulations requiring sunlight- and weather-resistance testing, test in accordance with “Weatherability forColored Materials (including white and black)” in Specifica-tion D 1248. Prepare the specimens in accordance with TestMeth
23、ods D 470 for physical tests of insulations and jackets.9. Sampling9.1 Unless otherwise instructed, sample the insulation inaccordance with Test Methods D 470.10. Test Methods10.1 Unless otherwise instructed, test the insulation inaccordance with Test Methods D 470.11. Keywords11.1 ac voltage; cross
24、linked polyethylene; dc voltage; heatdistortion; hot creep; hot set; insulation resistance; waterabsorption; weather resistantASTM 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 e
25、xpressly 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 reviewed every five years andif not rev
26、ised, 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 theresponsible technical committee, which you m
27、ay 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 Conshohocken, PA 19428-2959,United St
28、ates. 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).TABLE 1 Physical Properties for Crosslinked Polyethylen
29、eInsulationUnaged Requirements:Tensile strength, min, psi MPa 1800 12.4Elongation at rupture, min, % 250Aged Requirements:After Air Oven Test at 121 6 1 C for 168 h:Tensile strength, min, % of unaged value 75Elongation at rupture, min, % of unaged value 75Heat Distortion:At 121 6 1 C, max, % of unag
30、ed value:4/0 Awg 107 mm2 and smaller (insulation on cable) 30Larger than 4/0 AWG 107 mm2 (buffed sample of insulation) 15Percent Hot CreepFilledUnfilled100175Percent Hot SetFilled 5Unfilled 10TABLE 2 Accelerated Water Absorption Test RequirementsElectrical Method:Permittivity after one day, max 6.0Increase in capacitance, max, %From 1 to 14 days 3.0From 7 to 14 days 1.5Stability factor after 14 days, max 1.0D 2655 00 (2006)2
