1、Designation:D265500 (Reapproved 2006) Designation: D2655 12An American National StandardStandard 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 indica
2、tes the year oforiginal adoption or, in the 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.1. Scope1.1 This specification covers a crosslinked poly
3、ethylene insulation for electrical wires and cables 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
4、, for voltage ratings notexceeding 2000 V and at conductor temperatures not exceeding 90C for normal operation. For copper conductors, the insulationmaycan be applied over the uncoated metal.1.3 Materials covered by this specification are not sunlight and weather resistant unless they are carbon bla
5、ck pigmented orcontain an additive system designed for 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 t
6、o test the conductor orcompleted cable.1.5 Whenever two sets of values are presented, in different units, the values in the first set are the standard, while those inparentheses are for information only.2. Referenced Documents2.1 ASTM Standards:2D470 Test Methods for Crosslinked Insulations and Jack
7、ets for Wire and CableD1248 Specification 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
8、 for Measurement of Hot Creep of Polymeric 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.4. Physic
9、al Properties4.1 The requirements for the insulation are listed in Table 1.5. Electrical Requirements5.1 Order of TestingPerform the ac voltage, insulation resistance, and dc voltage tests in that order when any of these testsare required. The sequence for other testing is not specified.5.2 AC Volta
10、ge TestSubject wires and cables to an ac test voltage for a period of 5 min. Unless otherwise specified, omit thistest if the dc voltage test described in 5.4 is to be performed. Test at a voltage of 100 V/mil 4 kV/mm based on the specified1This specification is under the jurisdiction of ASTM Commit
11、tee D09 on Electrical and Electronic Insulating Materials and is the direct responsibility of SubcommitteeD09.18 on Solid Insulations, Non-Metallic Shieldings, and Coverings for Electrical and Telecommunications Wires and Cables.Current edition approved AprilJan. 1, 2006.2012. Published April 2006.F
12、ebruary 2012. Originally approved in 1967. Last previous edition approved in 20002006 asD2655 00(2006). DOI: 10.1520/D2655-00R06.10.1520/D2655-12.2For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standar
13、dsvolume information, refer to the standards Document Summary page on the ASTM website.3Available from Insulated Cable Engineers Association, P. O. Box 440, South Yarmouth, MA 02664 or Global Engineering Documents, 15 Inverness Way East,Englewood, CO 80112.1This document is not an ASTM standard and
14、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 only th
15、e current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.nominal thickness of insulation for the rated circuit voltage, phase to phase. Conduct the
16、 tests in accordance with Test MethodsD470.5.3 Insulation ResistanceThe insulated conductor shall 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
17、a correction factor. Table 2 of Test Methods D470 contains the correction factors. Each insulation 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-re
18、sistance value corrected to 60F.5.3.1 Where a nonconducting separator is applied between the conductor 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 resistanc
19、e shall be at least 60 % of that required for the primary insulation based on the nominal thickness of thatinsulation.5.4 DC Voltage TestUpon completion of the insulation resistance test, each unshielded insulated conductor shall withstand for5 min a dc test voltage which is three times the ac test
20、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 Table 2 when tested inaccordance with the Accelerated Water Absorption Tests in Te
21、st Methods D470. Conduct the Electrical Method Test at 60 Hz withthe water temperature at 75 6 1C.6. Heat Distortion6.1 The requirements for heat distortion are given in Table 1 of this specification. The test is conducted in accordance with TestMethods D470.7. Percent Hot Creep and Percent Hot Set7
22、.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 Practice 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
23、 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 method. The extractables, after adrying time of 20 h, shall be no more than 30 percent. 30 %.8. Test Applicable for Sunlight and Weath
24、er Resistant Materials8.1 For insulations requiring sunlight- and weather-resistance testing, test in accordance with “Weatherability for ColoredMaterials (including white and black)” in Specification D1248. Prepare the specimens in accordance with Test Methods D470 forphysical tests of insulations
25、and jackets.TABLE 1 Physical Properties for Crosslinked PolyethyleneInsulationUnaged 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, mi
26、n, % of unaged value 75Heat Distortion:At 121 6 1 C, 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 CreepFilledUnfilled100175Percent Hot SetFilled 5Unfilled 10TABLE 2 Accelerated Water Absorption Test
27、 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 1229. Sampling9.1 Unless otherwise instructed, sample the insulation in accordance with Test Methods D470.10. Test M
28、ethods10.1 Unless otherwise instructed, test the insulation in accordance with Test Methods D470.11. Keywords11.1 ac voltage; crosslinked polyethylene; dc voltage; heat distortion; hot creep; hot set; insulation resistance; water absorption;weather resistantASTM International takes no position respe
29、cting 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 infringement of such rights, are entirely their own responsibility.This st
30、andard 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 for additional standardsand should be addressed to ASTM Internat
31、ional 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 known to the ASTM Committee on Standards, at the address shown belo
32、w.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 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 rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).D2655 123
