ASTM D350-2001 Standard Test Methods for Flexible Treated Sleeving Used for Electrical Insulation《电绝缘用经处理软套管的标准试验方法》.pdf

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1、Designation: D 350 01An 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 (e) 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. Scope1.1 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 areprovided

6、for information only.1.4 This is a fire-test-response standard. See Sections 22through 28, which are the procedures for flammability tests.1.5 These test methods can be used to measure and describethe properties of materials, products, or assemblies in responseto heat and flame under controlled labo

7、ratory conditions, butshould not be used to describe or appraise the fire hazard or firerisk of materials, products, or assemblies under actual fireconditions. However, results of this test may be used aselements of a fire risk assessment which take into account allof the factors which are pertinent

8、 to an assessment of the firehazard of a particular end use.1.6 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-b

9、ility of regulatory limitations prior to use. For specific hazardstatements, see 45.2 and 63.1.1.NOTE 1This standard resembles IEC 60684-2, Specification forFlexible Insulating SleevingPart 2 Methods of Test, in a number ofways, but is not consistently similar throughout. The data obtained usingeith

10、er standard may not be technically equivalent.2. Referenced Documents2.1 ASTM Standards:D 149 Test Method for Dielectric Breakdown Voltage andDielectric Strength of Solid Electrical Insulating Materialsat Commercial Power Frequencies2D 374 Test Methods for Thickness of Solid Electrical Insu-lation2D

11、 471 Test Method for Rubber PropertyEffect of Liq-uids3D 746 Test Method for Brittleness Temperature of Plasticsand Elastomers by Impact4D 876 Test Methods for Nonrigid Vinyl Chloride PolymerTubing Used for Electrical Insulation2D 2307 Test Method for Relative Thermal Endurance ofFilm-Insulated Roun

12、d Magnet Wire2D 3487 Specification for Mineral Insulating Oil Used inElectrical Apparatus5D 3636 Practice for Sampling and Judging Quality of SolidElectrical Insulating Materials6D 5423 Specification for Forced-Convection LaboratoryOvens for Evaluation of Electrical Insulation6D 6054 Practice for Co

13、nditioning Electrical Insulating Ma-terials for Testing6E 145 Specification for Gravity-Convection and Forced-Ventilation Ovens72.2 IEEE Standard:IEEE 101 Guide for the Statistical Analysis of Thermal LifeTest Data81These test methods are under the jurisdiction of ASTM Committee D09 onElectrical and

14、 Electronic Insulating Materials and are the direct responsibility ofSubcommittee D09.07 on Flexible and Rigid Insulating Materials.Current edition approved Sept. 10, 2001. Published November 2001. Originallypublished as D 350 32T. Last previous edition D 350 96.2Annual Book of ASTM Standards, Vol 1

15、0.01.3Annual Book of ASTM Standards, Vol 09.01.4Annual Book of ASTM Standards, Vol 08.01.5Annual Book of ASTM Standards, Vol 10.03.6Annual Book of ASTM Standards, Vol 10.02.7Annual Book of ASTM Standards, Vol 14.04.8Available from the Institute of Electrical and Electronics Engineers, Inc., 1828L St

16、., NW, Suite 1202, Washington, DC 2003651041Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.2.3 IEC Standard:IEC 60684-2 Specification for Flexible InsulatingSleevingPart 2 Methods of Test93. Terminology3.1 Definitions of Terms Specif

17、ic to This Standard:3.1.1 flammability, na measure of the rate of travel of aflame down a specimen when ignited and held in a verticalposition.3.1.2 size, na numerical designation which indicates thatthe inside diameter of the sleeving lies within the limitsprescribed in Table 1.3.1.3 wall thickness

18、, none half 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. Sele

19、ction of 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

20、material 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 qual

21、ity level 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 2C (73.4 63.6F) shall be used in conducting all tests and for conditioningspecimens for a period of at least 18 h

22、 prior 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 3.6F) before testing. If a conditioning cabinet is used,specimens shall be tested for dielectri

23、c breakdown 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

24、minimum 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 DiameterP

25、ass 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 loosel

26、y, insert 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 dia

27、meters 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 presso

28、r foot shall be 3 oz (85 g). Obtainthe average of five thickness readings taking the micrometerreadings 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 be9Available from American Nation

29、al Standards Institute, 25 W. 43rd St., 4thFloor, New York, NY 10036.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 (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)

30、 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) 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.

31、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) 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

32、 (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)D 3502used as alternative methods where agreed upon between themanufacturer and purchaser. Compute wall thickness as halfthe distance between the outsid

33、e 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 Bias11.1 PrecisionThe overa

34、ll 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 partici-pating.1011.2 Bias

35、This 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 withstand electricalstress

36、 without failure. This value does not correspond to thedielectric breakdown voltage expected in service, but may beof considerable value in comparing different materials ordifferent lots, in controlling manufacturing processes or, whencoupled with experience, for a limited degree of design work.The

37、comparison of dielectric breakdown voltage of the samesleeving before and after environmental conditioning (mois-ture, heat, and the like) gives a measure of its ability to resistthese effects. For a more detailed discussion, refer to TestMethod D 149.13. Apparatus13.1 Inner ElectrodeA straight suit

38、able 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 strandedco

39、nductors 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 for ea

40、ch 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 sleeving spec

41、imen 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 mm) to

42、 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 Test Spe

43、cimensTen 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 mandrel havin

44、g 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 Carefull

45、y 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 electrod

46、e 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), and16.1.6 T

47、emperature and relative humidity of test, if differentfrom 6.1.17. 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 th

48、ree selected10Supporting data are on file at ASTM International Headquarters. Request RR:D-9-1024.TABLE 2 Estimated Precision of Wall Thickness MeasurementSleeving TypeNominal Value,in. (mm)(Sr)j,in. (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

49、) 0.0021 (0.053)Silicone Rubber 0.0331 (0.84) 0.0012 (0.030) 0.0019 (0.048)D 3503materials. These estimates are based on a round robin of thethree materials with six laboratories participating.1017.2 BiasThis test method has no bias because the valuefor dielectric breakdown voltage is determined solely in termsof this test method.BRITTLENESS TEMPERATURE18. Significance and Use18.1 This test method serves to measure the brittlenesstemperature of the sleeving. It is useful for comparative andquality control purposes.18.2 Results of this test have not b