ASTM D350-2008 Standard Test Methods for Flexible Treated Sleeving Used for Electrical Insulation.pdf

1、Designation: D 350 08An American National StandardStandard Test Methods forFlexible Treated Sleeving Used for Electrical Insulation1This standard is issued under the fixed designation D 350; the number immediately following the designation indicates the year oforiginal adoption or, in the case of re

2、vision, 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.This standard has been approved for use by agencies of the Department of Defense.1. Scope*1.1 These test metho

3、ds cover procedures for testing electri-cal insulating sleeving comprising a flexible tubular productmade from a woven textile fibre base, such as cotton, rayon,nylon, or glass, thereafter impregnated, or coated, or impreg-nated and coated, with a suitable dielectric material.1.2 The procedures appe

4、ar in the following sections:Procedures SectionsBrittleness Temperature 18 to 21Compatibility of Sleeving with Magnet Wire Insulation 45 to 59Conditioning 6Dielectric Breakdown Voltage 12 to 17Dielectric Breakdown Voltage After Short-Time Aging 29 to 33Dimensions 7 to 11Effect of Push-Back After Hea

5、t Aging 73 to 78Flammability 22 to 28Hydrolytic Stability 66 to 72Oil Resistance 34 to 37Selection of Test Material 5Solvent Resistance 60 to 65Thermal Endurance 38 to 441.3 The values stated in inch-pound units, except for C, areto be regarded as the standard. The values in parentheses aremathemati

6、cal conversions to SI units that are provided forinformation only and are not considered standard.1.4 This is a fire-test-response standard. See Sections 22through 28, which are the procedures for flammability tests.1.5 This standard measures and describes the response ofmaterials, products, or asse

7、mblies to heat and flame undercontrolled conditions, but does not by itself incorporate allfactors required for fire hazard or fire risk assessment of thematerials, products or assemblies under actual fire conditions.1.6 This standard does not purport to address all of thesafety concerns, if any, as

8、sociated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use. For specific hazardstatements, see 45.2 and 63.1.1.NOTE 1This standard resembles IEC 60684-2, Spe

9、cification for Flex-ible Insulating SleevingPart 2 Methods of Test, in a number of ways,but is not consistently similar throughout. The data obtained using eitherstandard may not be technically equivalent.2. Referenced Documents2.1 ASTM Standards:2D 149 Test Method for Dielectric Breakdown Voltage a

10、ndDielectric Strength of Solid Electrical Insulating Materialsat Commercial Power FrequenciesD 374 Test Methods for Thickness of Solid Electrical Insu-lationD 471 Test Method for Rubber PropertyEffect of LiquidsD 746 Test Method for Brittleness Temperature of Plasticsand Elastomers by ImpactD 876 Te

11、st Methods for Nonrigid Vinyl Chloride PolymerTubing Used for Electrical InsulationD 1711 Terminology Relating to Electrical InsulationD 2307 Test Method for Thermal Endurance of Film-Insulated Round Magnet WireD 3487 Specification for Mineral Insulating Oil Used inElectrical ApparatusD 3636 Practic

12、e for Sampling and Judging Quality of SolidElectrical Insulating MaterialsD 5423 Specification for Forced-Convection LaboratoryOvens for Evaluation of Electrical InsulationD 6054 Practice for Conditioning Electrical Insulating Ma-terials for TestingE 145 Specification for Gravity-Convection and Forc

13、ed-Ventilation OvensE 176 Terminology of Fire Standards2.2 IEEE Standard:IEEE 101 Guide for the Statistical Analysis of Thermal LifeTest Data32.3 IEC Standard:IEC 60684-2 Specification for Flexible Insulating1These test methods are under the jurisdiction of ASTM Committee D09 onElectrical and Electr

14、onic Insulating Materials and are the direct responsibility ofSubcommittee D09.07 on Flexible and Rigid Insulating Materials.Current edition approved May 1, 2008. Published June 2008. Originallyapproved in 1932. Last previous edition approved in 2001 as D 350 01.2For referenced ASTM standards, visit

15、 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 Institute of Electrical and Electronics Engineers, Inc. (IEEE),445 Hoes Ln., P.O.

16、Box 1331, Piscataway, NJ 08854-1331, http:/www.ieee.org.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.SleevingPart 2 Methods of Test42.4 ISO Standard:ISO 13943 Fire

17、SafetyVocabulary3. Terminology3.1 Definitions:3.1.1 Use Terminology E 176 and ISO 13943 for definitionsof terms used in this test method and associated with fireissues. Where differences exist in definitions, those containedin Terminology E 176 shall be used. Use Terminology D 1711for definitions of

18、 terms used in this test method and associatedwith electrical insulation materials.3.2 Definitions of Terms Specific to This Standard:3.2.1 size, na numerical designation which indicates thatthe inside diameter of the sleeving lies within the limitsprescribed in Table 1.3.2.2 wall thickness, none ha

19、lf the difference between theoutside diameter of the sleeving mounted on a loosely fittinggage rod and the diameter of the gage rod when measured inaccordance with 9.2.4. Apparatus and Materials4.1 Ovens used in these test methods shall meet the require-ments of Specification D 5423.5. Selection of

20、Test Material5.1 In the case of sleeving on spools or in coils, not less thanthree turns of the product shall be removed before the selectionof material from which test specimens are to be prepared.5.2 In the case of sleeving offered in cut lengths, testspecimens shall not be prepared from material

21、closer than 1 in.(25 mm) from each end.5.3 Specimens for test shall not show obvious defects unlessthe purpose of the test is to determine the effect of such defects.5.4 Specimens shall be prepared from samples selected inaccordance with Practice D 3636. The sampling plan andacceptance quality level

22、 shall be as agreed upon between theuser and the producer.6. Conditioning6.1 Unless otherwise specified, a standard laboratory atmo-sphere of 50 6 5 % relative humidity and 23 6 2 C (73.4 63.6 F) shall be used in conducting all tests and for condition-ing specimens for a period of at least 18 h prio

23、r to testing.6.2 In the case of dielectric breakdown voltage tests afterhumidity conditioning, specimens shall be conditioned for 96 hin an atmosphere of 93 6 3 % relative humidity and 23 6 2C(73.4 6 3.6 F) before testing. If a conditioning cabinet is used,specimens shall be tested for dielectric br

24、eakdown voltagewithin 1 min after removal from the cabinet.6.3 For details regarding conditioning, refer to PracticeD 6054.DIMENSIONS7. Apparatus7.1 Gage RodsStandard gage rods shall be made of steeland shall have smooth surfaces and rounded edges. One rod isrequired for each of the maximum and mini

25、mum diametersshown in Table 1 for each size. Each rod shall be within60.005 in. (66.012 mm) of the values shown in Table 1.8. Test Specimens8.1 Five test specimens of at least 7 in. (180 mm) in lengthshall be cut from material obtained in accordance with Section5.9. Procedure9.1 Inside DiameterPass

26、the minimum gage rod for thesize sleeving under test into the specimen for a distance of 5 in.(127 mm) without expanding the wall of the sleeving. If the rodhas a snug fit, then consider the specimen as having an insidediameter equal to the diameter of the rod. If the minimum gagerod fits loosely, i

27、nsert the maximum gage rod into the speci-men. If the maximum gage rod passes freely into the specimenfor a distance of 5 in. with a snug fit, or if it expands the wallof the specimen, then consider the sleeving to be of that sizewhich falls within the limits of the maximum and minimuminside diamete

28、rs as represented by the gage rods.9.2 Wall ThicknessInsert in the specimen the largeststandard gage rod that will pass freely into the sleeving. Applya micrometer over the specimen and make thickness measure-ments as specified in Method C of Test Methods D 374 exceptthat the force on the pressor fo

29、ot shall be 3 oz (85 g). Obtain4Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.TABLE 1 ASTM Standard Sizes for Flexible SleevingSizeInside Diameter, in. (mm)Max Min1 in. 1.036 (26.3) 1.000 (25.4)78 in. 0.911 (23.1) 0.875

30、(22.2)34 in. 0.786 (20.0) 0.750 (19.1)58 in. 0.655 (16.6) 0.625 (15.9)12 in. 0.524 (13.3) 0.500 (12.7)716 in. 0.462 (11.7) 0.438 (11.1)38 in. 0.399 (10.1) 0.375 (9.5)No. 0 0.347 (8.8) 0.325 (8.3)No. 1 0.311 (7.9) 0.289 (7.3)No. 2 0.278 (7.1) 0.258 (6.6)No. 3 0.249 (6.3) 0.229 (5.8)No. 4 0.224 (5.7)

31、0.204 (5.2)No. 5 0.198 (5.0) 0.182 (4.6)No. 6 0.178 (4.5) 0.162 (4.1)No. 7 0.158 (4.0) 0.144 (3.7)No. 8 0.141 (3.6) 0.129 (3.3)No. 9 0.124 (3.1) 0.114 (2.9)No. 10 0.112 (2.8) 0.102 (2.6)No. 11 0.101 (2.6) 0.091 (2.31)No. 12 0.091 (2.31) 0.081 (2.06)No. 13 0.082 (2.08) 0.072 (1.83)No. 14 0.074 (1.88)

32、 0.064 (1.63)No. 15 0.067 (1.70) 0.057 (1.45)No. 16 0.061 (1.55) 0.051 (1.30)No. 17 0.054 (1.37) 0.045 (1.14)No. 18 0.049 (1.24) 0.040 (1.02)No. 20 0.039 (0.99) 0.032 (0.81)No. 22 0.032 (0.81) 0.025 (0.64)No. 24 0.027 (0.69) 0.020 (0.51)D350082the average of five thickness readings taking the microm

33、eterreadings at approximately 90 intervals about the circumfer-ence of the specimen and spaced lineally approximately 0.25in. (6 mm). Methods A and B of Test Methods D 374 can beused as alternative methods where agreed upon between themanufacturer and purchaser. Compute wall thickness as halfthe dis

34、tance between the outside diameter of the mountedsleeving and the diameter of the gage rod.10. Report10.1 Report the following information:10.1.1 Identification of the sleeving,10.1.2 Method of measurement if other than Method C,10.1.3 Size of sleeving, and10.1.4 Wall thickness.11. Precision and Bia

35、s11.1 PrecisionThe overall estimates of the precisionwithin laboratories (Sr)jand the precision between laboratories(SR)jfor the determination of wall thickness are given in Table2 for three selected materials. These estimates are based on around robin of the three materials with six laboratories pa

36、rtici-pating.511.2 BiasThis test method has no bias because the valuefor wall thickness is determined solely in terms of this testmethod itself.DIELECTRIC BREAKDOWN VOLTAGE12. Significance and Use12.1 The dielectric breakdown voltage of the sleeving is ofimportance as a measure of its ability to wit

37、hstand electricalstress without failure. This value does not correspond to thedielectric breakdown voltage expected in service, but is ofvalue in comparing different materials or different lots, incontrolling manufacturing processes or, when coupled withexperience, for a limited degree of design wor

38、k. The compari-son of dielectric breakdown voltage of the same sleevingbefore and after environmental conditioning (moisture, heat,and the like) gives a measure of its ability to resist these effects.For a more detailed discussion, refer to Test Method D 149.13. Apparatus13.1 Inner ElectrodeA straig

39、ht suitable metallic conduc-tor which fits snugly into the sleeving, without stretching thewall, in such a manner that one end of the wire is exposed andcan be used to support the specimen.13.1.1 For specimens having an inside diameter greater thanabout size 8, it may be convenient to use either str

40、andedconductors or a bundle of wires of smaller size, instead of asolid conductor.13.2 Outer ElectrodeStrips of soft metal foil 1-in. (25-mm) wide and not more than 0.001 in. (0.03 mm) in thickness.14. Procedure AStraight Specimens14.1 Test SpecimensTen specimens 7 in. (180 mm) longshall be prepared

41、 for each conditioning test (see Section 6)from material selected in accordance with Section 5.14.2 Procedure:14.2.1 After conditioning in accordance with 6.1, determinethe dielectric breakdown voltage in accordance with TestMethod D 149 except as specified in 14.2.2 and 14.2.3.14.2.2 Mount a sleevi

42、ng specimen on the inner electrode.Wrap the outer electrode tightly on the outside of the sleevingat a distance of not less than 1 in. (25 mm) from the ends of thespecimens. Snugly wrap the foil over the sleeving. Wind twomore turns of foil over the first turn, leaving a free end of about0.5 in. (13

43、 mm) to which an electrical contact can be made.14.2.3 Determine the breakdown voltage, in accordancewith Test Method D 149 by the short time method, increasingthe voltage from zero at a rate of 0.5 kV/s. Calculate theaverage breakdown voltage for the ten tests.15. Procedure B90 Bent Specimens15.1 T

44、est SpecimensTen specimens 4 in. (100 mm) longshall be prepared for each conditioning test (see Section 6)from material selected in accordance with Section 5.15.2 Procedure:15.2.1 Mount a sleeving specimen on the inner electrode.15.2.2 Bend the specimen through an angle of 90 6 2 overa smooth mandre

45、l having a diameter of ten times the nominalinside diameter of the specimen. Arrange the bend so that it iscentrally located on the specimen.15.2.3 Condition the samples as specified in 6.1.15.2.4 Determine the dielectric breakdown voltage of thebent specimen using the following procedure:15.2.4.1 C

46、arefully wrap a strip of metal foil as in 14.2.2snugly over the specimens at the bend. In accordance with TestMethod D 149 apply a voltage starting at zero and increasing ata constant rate of 0.5 kV/s until breakdown. Calculate theaverage breakdown voltage of the ten specimens.NOTE 2Apply the foil e

47、lectrode after exposure to conditioning.16. Report16.1 Report the following information:16.1.1 Identification of the sleeving,16.1.2 Conditioning before test,16.1.3 Voltage breakdown for each puncture,16.1.4 Average, minimum, and maximum voltage break-down,16.1.5 Procedure used (Method A or B), and1

48、6.1.6 Temperature and relative humidity of test, if differentfrom 6.1.5Supporting data have been filed at ASTM International Headquarters and maybe obtained by requesting Research Report RR: D09-1024.TABLE 2 Estimated Precision of Wall Thickness MeasurementSleeving TypeNominal Value,in. (mm)(Sr)j,in

49、. (mm)(SR)j,in. (mm)Acrylic 0.0213 (0.54) 0.0007 (0.018) 0.0017 (0.043)PVC 0.0237 (0.60) 0.0007 (0.018) 0.0021 (0.053)Silicone Rubber 0.0331 (0.84) 0.0012 (0.030) 0.0019 (0.048)D35008317. Precision and Bias17.1 PrecisionThe overall estimates of the precisionwithin laboratories (Sr)jand the precision between laboratories(SR)jfor the determination of Dielectric Breakdown Voltageby Procedure A are given in Table 3 for three selectedmaterials. These estimates are based on a round robin of thethree materials with six laboratories participating.517.2 Bi