1、Designation:D90212Standard Test Methods forFlexible Resin-Coated Glass Fabrics and Glass Fabric TapesUsed for Electrical Insulation1This standard is issued under the fixed designation D902;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revis
2、ion,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 U.S.Department of Defense.1.Scope*1.1 These test methods co
3、ver procedures for the testing ofresin-coated glass fabrics and glass fabric tapes(Note 1)to beused as electrical insulation.NOTE1Methods of testing varnished cloths and tapes are given inMethods D295.1.2 The warp threads in fabrics are the threads that areparallel with the length dimension as manuf
4、actured.1.3 The procedures appear as follows:ProcedureSectionASTM TestMethod ReferenceBreaking Strength22 28D828Conditioning6 8.Dielectric Breakdown Voltage and Di-electric Strength29 38D149,D295Dissipation Factor and Relative Permit-tivity52 60D150,E104,D5032Effect of Elevated Temperature39 45D1830
5、Resistance to Oil46 51D3487Sampling3 5.Thermal Endurance68D1830Thickness16 21D374Thread Count12 15.Weight9 11.Weight Loss at Elevated Temperature61 67D54231.4 The values stated in inch-pound units are to be regardedas the standard.The values in parentheses are for informationonly.1.5 This standard d
6、oes 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-bility of regulatory limitations prior to use.Specific warningstatement are given i
7、n 35.1.1 and 58.1.2.Referenced Documents2.1 ASTM Standards:2D149 Test Method for Dielectric Breakdown Voltage andDielectric Strength of Solid Electrical Insulating Materialsat Commercial Power FrequenciesD150 Test Methods for AC Loss Characteristics and Permit-tivity(Dielectric Constant)of Solid Ele
8、ctrical InsulationD295 Test Methods for Varnished Cotton Fabrics Used forElectrical InsulationD374 Test Methods for Thickness of Solid Electrical Insu-lation(Withdrawn 2013)3D828 Test Method for Tensile Properties of Paper andPaperboard Using Constant-Rate-of-ElongationApparatus(Withdrawn 2009)3D171
9、1 Terminology Relating to Electrical InsulationD1830 Test Method for Thermal Endurance of FlexibleSheet Materials Used for Electrical Insulation by theCurved Electrode MethodD3487 Specification for Mineral Insulating Oil Used inElectrical ApparatusD5032 Practice for Maintaining Constant Relative Hum
10、idityby Means of Aqueous Glycerin SolutionsD5423 Specification for Forced-Convection Laboratory Ov-ens for Evaluation of Electrical InsulationE104 Practice for Maintaining Constant Relative Humidityby Means of Aqueous Solutions1These methods are under the jurisdiction of ASTM Committee D09 onElectri
11、cal and Electronic Insulating Materials and are the direct responsibility ofSubcommittee D09.07 on Flexible and Rigid Insulating Materials.Current edition approved April 1,2012.Published April 2012.Originallyapproved in 1946.Last previous edition approved in 2006 as D902 06.DOI:10.1520/D0902-12.2For
12、 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.3The last approved version of this historical standard is referenced o
13、nwww.astm.org.*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 States1 2.2 IEEE Standard:IEEE No.1 General Principles for Temperature Limits in theRating of Electrical Equipment4SAMP
14、LING3.Selecting Sample Rolls3.1 Sample shipments of resin-coated glass fabrics and glassfabric tapes as specified in 3.2 and 3.3.Select the rolls or padsin such a manner as to be representative of the shipment.3.2 FabricSelect one roll from each ten rolls or fractionthereof in a shipment of full-wid
15、th fabric.3.3 TapeThe producer and consumer shall agree upon thenumber of rolls selected.Unless otherwise specified,a mini-mum of three rolls per lot shall be selected.For samplingpurposes,a lot consists of identifiable materials of the sametype manufactured in one production run and offered fordeli
16、very at the same time.4.Selecting Samples4.1 Cut off and discard not less than two turns of fabric orsix turns of tape from each roll or pad selected for samplingbefore the samples are selected.4.2 From shipments such as sheets of fabric or strips of tape,take samples representative of the shipment in accordance with4.1.5.Selecting Test Specimens5.1 Prepare the test specimens from samples as selected inSection 4 and as provided for in the individual test methods.CONDITIONING6.Terminology6.1 Defi
