ASTM D3555-2007 Standard Specification for Track-Resistant Black Crosslinked Polyethylene Insulation for Wire and Cable 90&176 C Operation《90C工作条件下的电线和电缆用不留痕迹的黑色交联聚乙烯绝缘材料的标准规范》.pdf

1、Designation: D 3555 07An American National StandardStandard Specification forTrack-Resistant Black Crosslinked Polyethylene Insulationfor Wire and Cable, 90 C Operation1This standard is issued under the fixed designation D 3555; the number immediately following the designation indicates the year ofo

2、riginal 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. Scope*1.1 This specification covers a track-resistant blackcrosslink

3、ed polyethylene insulation, the base polymer whichconsists substantially of polyethylene or its copolymers. Thisinsulation shall be carbon black pigmented.1.2 This type of insulation is considered suitable for use onwire or cable that will be used for continuous operation atconductor temperatures up

4、 to 90 C.1.3 This insulation is suitable for use on wire or in cableused for power transmission in overhead spaced-line service,installed at temperatures above 25 and exposed to sunlightand other atmospheric environments between 55 and +90 C.1.4 In many instances, the insulation cannot be tested unl

5、essit has been formed around a conductor.Therefore, tests done oninsulated wire in this standard are solely to determine therelevant property of the insulation and not to test the conductoror completed cable.1.5 Whenever two sets of values are presented, in differentunits, the values in the first se

6、t 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 1711 Terminology Relating to Electrical InsulationD 2132 Test Method for Dust-and-Fog Tracking and Ero-sion

7、Resistance of Electrical Insulating MaterialsD 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 Creepof Polymeric Insulations33. Terminology3.1 Definitions:3.1.1 For definitions of term

8、s used in this specification, referto Terminology D 1711.3.2 Definition of Term Specific to This Standard:3.2.1 aging, (act of), nexposure of materials to air at atemperature of 121 C for 168 h.4. Physical Properties4.1 When tested for physical and aging requirements, heatdistortion, cold bend, U-be

9、nd discharge, surface resistivity, andtrack resistance in accordance with Test Methods D 470, thetrack-resistant black crosslinked polyethylene insulation shallmeet the requirements specified in Table 1. The insulation is tomeet the requirements for percent hot creep and hot setspecified in Table 1.

10、 The test is to be performed in accordancewith ICEA T-28-562. Only in case of dispute, the solventextraction (gel content and swell ratio) test in Test MethodsD 2765 is to be the referee method. The extractables, after adrying time of 20 h, shall be no more than 30 %.5. Electrical Requirements5.1 Su

11、bject cable specimens to a 5 min ac or dc voltagewithstand test at voltages which are based on the nominalthickness of the insulation. Conduct tests in accordance withMethods D 470 using 125 V/mil (5 kV/mm) for ac tests or 375V/mil (15 kv/mm) for dc tests.6. Sampling6.1 Sample the insulation in acco

12、rdance with Test MethodsD 470, D 2765, and ICEA T-28-562.7. Test Methods7.1 Test the insulation in accordance with Test MethodsD 470, D 2132, and D 2765, modified as noted in Table 1, andICEA T-28-562.1This specification is under the jurisdiction of ASTM Committee D09 onElectrical and Electronic Ins

13、ulating 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 Oct. 1, 2007. Published October 2007. Originallyapproved in 1977. Last previous edition a

14、pproved in 2001 as D 3555 01.2For 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 onthe ASTM website.3Available from The Insulated Ca

15、ble 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, United States.8. Keywords8.1 ac test; cold bend; c

16、rosslinked polyethylene; dc test;elongation; environmental cracking; heat distortion. surfaceresistivity; tensile strength; track-resistant; u-bend dischargeSUMMARY OF CHANGESCommittee D09 has identified the location of selected changes to this specification since the last issue,D 3555 01, that may

17、impact the use of this specification. (Approved October 1, 2007)(1) Made editorial changes to 1.4.(2) Moved the text of 3.1 into new 3.1.1.(3) Revised the track resistance requirement in Table 1.ASTM International takes no position respecting the validity of any patent rights asserted in connection

18、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 revision at any time by the responsible te

19、chnical 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 comments will receive careful consider

20、ation 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 copyrighted by ASTM International, 100 Barr

21、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(

22、www.astm.org).TABLE 1 Physical Requirements for Track-Resistant Black Crosslinked Polyethylene InsulationPhysical requirements (unaged):Tensile strength, min, psi (MPa) 1800 (12.4)Elongation at rupture, min, % 250Physical requirements after aging in an air oven at 121 6 1 C for 168 h:Tensile strengt

23、h, min, % of unaged value 75Elongation at rupture, min, % of unaged value 75Heat distortion at 121 6 1 C, max, % of unaged thickness:4/0 AWG (107 mm2) and smaller (insulation on cable) 30Larger than 4/0 AWG (107 mm2) (buffed sample of insulation) 15Percent Hot CreepFilled 100Unfilled 175Percent Hot SetFilled 5Unfilled 10Cold bend, 25 6 1Cfor1h no cracksU-bend discharge, 125 V/mil (5 kV/mm) no cable failures or cracks in insulationsurfaceSurface resistivity, min, MV 200 000Track resistance:Average time to failure, min (h) 200 (3.33)D3555072