1、Designation: D2655 12D2655 17Standard Specification forCrosslinked Polyethylene Insulation for Wire and CableRated 0 to 2000 V1This standard is issued under the fixed designation D2655; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revisio
2、n, 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.1. Scope Scope*1.1 This specification covers a crosslinked polyethylene insulation for electrical wires and cables
3、in conductor sizes 14 AWG2.08 mm2 and larger. The base polymer of this insulation consists substantially of polyethylene or a polyethylene copolymer.1.2 This type of insulation is suitable for continuous use on power cables in wet and dry locations, for voltage ratings notexceeding 2000 V and at con
4、ductor temperatures not exceeding 90C for normal operation. For copper conductors, the insulationcan be applied over the uncoated metal.1.3 Materials covered by this specification are not sunlight and weather resistant unless they are carbon black pigmented orcontain an additive system designed for
5、this protection.1.4 In many instances the insulation cannot be tested unless it has been formed around a conductor. Therefore, tests are doneon insulated wire in this standard solely to determine the relevant property of the insulation and not to test the conductor orcompleted cable.1.5 Whenever two
6、 sets of values are presented, in different units, the values in the first set are the standard, while those inparentheses are for information only.1.6 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on
7、Principles for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2D470 Test Methods for Crosslinked Insulations and Jackets for Wire and CableD1248 Specifi
8、cation for Polyethylene Plastics Extrusion Materials for Wire and CableD1711 Terminology Relating to Electrical InsulationD2765 Test Methods for Determination of Gel Content and Swell Ratio of Crosslinked Ethylene Plastics2.2 ICEA Standard:ICEA T-28-562 Test Method for Measurement of Hot Creep of Po
9、lymeric Insulations33. Terminology3.1 Definitions:3.1.1 For 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), nexposure of materials to air at 121C for 168 h.1 This specification is under the jurisdicti
10、on of ASTM Committee D09 on Electrical and Electronic Insulating Materials and is the direct responsibility of SubcommitteeD09.07 on Electrical Insulating Materials.Current edition approved Jan. 1, 2012Nov. 1, 2017. Published February 2012November 2017. Originally approved in 1967. Last previous edi
11、tion approved in 20062012as D2655 00 (2006).D2655 12. DOI: 10.1520/D2655-12.10.1520/D2655-17.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document S
12、ummary page on the ASTM website.3 Available from Insulated Cable Engineers Association, P. O. Box 440, South Yarmouth, MA 02664 or Global Engineering Documents, 15 Inverness Way East,Englewood, CO 80112.This document is not an ASTM standard and is intended only to provide the user of an ASTM standar
13、d 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 only the current versionof the standard as published by ASTM i
14、s 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. Physical Properties Requirements4.1 The requirements for the insulation are l
15、isted in Table 1.4.2 Tensile Strength and Percent Elongation at Rupture:4.2.1 The test is conducted in accordance with Test Method D470. The requirements for tensile strength and elongation aregiven in Table 1 of this Specification.4.3 Heat Distortion:4.3.1 The test is conducted in accordance with S
16、tandard Test Methods D0470. The requirements for heat distortion are givenin Table 1 of this specification.4.4 Percent Hot Creep and Percent Hot Set:4.4.1 Conduct these test in accordance with Test Method ICEA T-28-562.4.4.2 Determine the percent hot creep for 15 min at 150C (302F). Meet the filled
17、or unfilled values specified in Table 1.4.4.3 Determine the percent hot set for 5 min at 150C (302F). Meet the filled or unfilled values specified in Table 1.4.4.4 Determination of gel content is the reference Test Method in case of a dispute, and the test is conducted in accordancewith Standard Tes
18、t Method D2765. Meet the percent extractable requirements specified in Table 1.4.5 Test Applicable for Sunlight and Weather Resistant Materials:4.5.1 Test in accordance with “Weatherability for Colored Materials (including white and black)” in Specification D1248.Prepare the specimens in accordance
19、with Test Methods D0470 for physical tests of insulations and jackets (physical testprocedures section). THE SPECIMENS SHALL MEET THE REQUIREMENTS FOR CLASS C OR CLASS D IN SPECIFI-CATION D1248.5. Electrical Requirements5.1 Order of TestingPerform the ac voltage, insulation resistance, and dc voltag
20、e tests in that order when any of these testsare required. The sequence for other testing is not specified.5.2 AC Voltage TestConduct the tests in accordance with Test Methods D470. Subject wires and cables to an ac test voltagefor a period of 5 min. Unless otherwise specified, omit this test if the
21、 dc voltage test described in 5.4 is to be performed. Test ata voltage of 100 V/mil 4 kV/mm based on the specified nominal thickness of insulation for the rated circuit voltage, phase tophase. Conduct the tests in accordance with Test Methods D470.5.3 Insulation ResistanceThe insulated conductor sha
22、ll have an insulation resistance equal to or greater than thatcorresponding to a constant of 10 000 at 60F 15.6C. When the temperature of the water in which the insulation is tested differsfrom 60F, apply a correction factor. Table 2 of Test Methods D470 contains the correction factors. Each insulat
23、ion manufacturercan furnish the 1F coefficient for the insulation material by using the procedure given in Test Methods D470. Multiply themeasured value by the correction factor to obtain the insulation-resistance value corrected to 60F.5.3.1 Where a nonconducting separator is applied between the co
24、nductor and insulation or where an insulated conductor iscovered with a nonmetallic jacket so that the insulation resistance can be measured only on the completed assembly, the requiredinsulation resistance shall be at least 60 % of that required for the primary insulation based on the nominal thick
25、ness of thatinsulation.TABLE 1 Physical Properties for Crosslinked PolyethyleneInsulationUnaged Tensile Properties Requirements:Tensile strength, min, psi MPa 1800 12.4Elongation at rupture, min, % 250Aged Tensile Properties Requirements:After Air Oven Test at 121 1C for 168 h:Tensile strength, min,
26、 % of unaged value 75Elongation at rupture, min, % of unaged value 75Heat Distortion:Heat Distortion Requirements:At 121 1C, max, % of unaged value:4/0 Awg 107 mm2 and smaller (insulation on cable) 30Larger than 4/0 AWG 107 mm2 (buffed sample of insulation) 15Percent Hot Creep Requirements:Filled (m
27、ax %)Unfilled (max %)100175Percent Hot Set Requirements:Filled (max %) 5Unfilled (max %) 10Percent Extractable Requirement:After drying for 20 h (* referee test only *) (max) 30D2655 1725.4 DC Voltage TestUpon completion of the insulation resistance test, each unshielded insulated conductor shall wi
28、thstand for5 min a dc test voltage which is three times the ac test voltage specified in 5.2. Unless otherwise specified, omit this test if theac voltage test described in 5.2 has been performed.5.5 Accelerated Water Absorption RequirementsThe insulation shall meet the requirements of Test Table 2 w
29、hen tested inaccordance with the Accelerated Water Absorption Tests in Test Methods D470.D0470. Conduct the Electrical Method Test at 60Hz with the water temperature at 75 6 1C. The insulation shall meet the requirements of Table 2.6. Heat Distortion6.1 The requirements for heat distortion are given
30、 in Table 1 of this specification. The test is conducted in accordance with TestMethods D470.7. Percent Hot Creep and Percent Hot Set7.1 Determine the percent hot creep for 15 min at 150C 302F as follows: Meet the filled or unfilled values specified in Table1. Conduct this test in accordance with Pr
31、actice ICEA T-28-562.7.2 Determine the percent hot set for 5 min at 150C 302F as follows: Meet the filled or unfilled values specified in Table1. Conduct this test in accordance with Practice ICEA T-28-562.7.3 In case of dispute, the solvent extraction test in Test Method D2765 is to be the referee
32、method. The extractables, after adrying time of 20 h, shall be no more than 30 %.8. Test Applicable for Sunlight and Weather Resistant Materials8.1 For insulations requiring sunlight- and weather-resistance testing, test in accordance with “Weatherability for ColoredMaterials (including white and bl
33、ack)” in Specification D1248. Prepare the specimens in accordance with Test Methods D470 forphysical tests of insulations and jackets.6. Sampling6.1 Unless otherwise instructed, sample the insulation in accordance with Test Methods D470.7. Test Methods7.1 Unless otherwise instructed, test the insula
34、tion in accordance with Test Methods D470.8. Keywords8.1 ac voltage; crosslinked polyethylene; dc voltage; heat distortion; hot creep; hot set; insulation resistance; water absorption;sunlight and weather resistant; weather resistantwater absorptionSUMMARY OF CHANGESCommittee D09 has identified the
35、location of selected changes to this standard since the last issue(D2655 12) that may impact the use of this standard. (Approved Nov. 1, 2017.)(1) Revised Table 1.(2) Added new Subsections 4.2 4.5.(3) Revised 5.2 and 5.5.(4) Removed previous Sections 6 8 and renumbered subsequent sections accordingl
36、y.TABLE 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 1.0D2655 173ASTM International takes no position respecting the validity of any pa
37、tent 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 infringement of such rights, are entirely their own responsibility.This standard is subject to revisio
38、n 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 for additional standardsand should be addressed to ASTM International Headquarters. Your comm
39、ents 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 known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighte
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