ASTM_D_115_-_14.pdf

Designation:D11514Standard Test Methods for TestingSolvent Containing Varnishes Used for Electrical Insulation1This standard is issued under the fixed designation D115;the number immediately following the designation indicates 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.Scope*1.1 These test methods cover tests for solvent containingvarnishes primarily intended to provide electrical,mechanical,and chemical protection for electrical equipment.These testmethods include tests for control and performance as follows:ProcedureSectionBuild38 42Dielectric Strength43 48Drainage26 32Flash Point18 20Nonvolatile Matter21 25Oil Resistance54 56Preparation of Test Specimens7Specific Gravity9 12Temperature Index49 50Time of Drying33 37Varnish Compatibility51 53Viscosity13 171.2 Where the entire test method is included in this standard,the precision and bias are not known unless given in the statedmethod.1.3 The values stated in SI units are to be regarded asstandard.The values given in parentheses are for informationonly.1.4 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-bility of regulatory limitations prior to use.For specific hazardstatements,see Section 5.NOTE1There is no equivalent IEC standard.2.Referenced Documents2.1 ASTM Standards:2D56 Test Method for Flash Point by Tag Closed Cup TesterD93 Test Methods for Flash Point by Pensky-MartensClosed Cup TesterD149 Test Method for Dielectric Breakdown Voltage andDielectric Strength of Solid Electrical Insulating Materialsat Commercial Power FrequenciesD202 Test Methods for Sampling and Testing UntreatedPaper Used for Electrical InsulationD287 Test Method for API Gravity of Crude Petroleum andPetroleum Products(Hydrometer Method)D295 Test Methods for Varnished Cotton Fabrics Used forElectrical InsulationD374 Test Methods for Thickness of Solid Electrical Insu-lation(Withdrawn 2013)3D580 Specification for Greige Woven Glass Tapes andWebbingsD1475 Test Method For Density of Liquid Coatings,Inks,and Related ProductsD1932 Test Method for Thermal Endurance of FlexibleElectrical Insulating VarnishesD2518 Specification for Woven Glass Fabrics for ElectricalInsulation(Withdrawn 2013)3D2519 Test Method for Bond Strength of Electrical Insulat-ing Varnishes by the Helical Coil TestD3145 Test Method for Thermal Endurance of ElectricalInsulating Varnishes by the Helical Coil MethodD3251 Test Method for Thermal Endurance Characteristicsof Electrical Insulating Varnishes Applied Over Film-Insulated Magnet WireD3278 Test Methods for Flash Point of Liquids by SmallScale Closed-Cup ApparatusD3487 Specification for Mineral Insulating Oil Used inElectrical ApparatusD5032 Practice for Maintaining Constant Relative Humidityby 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 Solutions3.Terminology3.1 Definitions:1These test methods are under the jurisdiction of ASTM Committee D09 onElectrical and Electronic Insulating Materials and are the direct responsibility ofSubcommittee D09.01 on Electrical Insulating Varnishes,Powders and Encapsulat-ing Compounds.Current edition approved Nov.1,2014.Published November 2014.Originallyapproved in 1941.Last previous edition approved in 2012 as D115 07(2012).DOI:10.1520/D0115-14.2For 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.3The last approved version of this historical standard is referenced onwww.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 3.1.1 dielectric strength,nthe voltage gradient at whichdielectric failure of the insulating material occurs under spe-cific conditions of test.3.1.2 drainage,nof an insulating varnish,a measure ofthe variation in thickness from top to bottom of a varnish filmobtained on the surface of a vertically dip-coated panel after aspecified time and temperature.3.1.3 flash point,nthe lowest temperature of thespecimen,corrected to a pressure of 760 mm Hg(101.3 kPa),at which application of an ignition source causes any vaporfrom the specimen to ignite under specified conditions of test.3.1.4 nonvolatile matter,nin insulating varnish,that por-tion of a varnish which is not volatilized when exposed tospecified conditions;the value obtained is not necessarily equalto the calculated solids