1、Designation:D14920Standard Test Method forDielectric Breakdown Voltage and Dielectric Strength ofSolid Electrical Insulating Materials at Commercial PowerFrequencies1This standard is issued under the fixed designation D149;the number immediately following the designation indicates the year oforigina
2、l 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.This standard has been approved for use by agencies of the U.S.Department of Defense
3、.1.Scope*1.1 This test method covers procedures for the determina-tion of dielectric strength of solid insulating materials atcommercial power frequencies,under specified conditions.2,31.2 Unless otherwise specified,the tests shall be made at 60Hz.However,this test method is suitable for use at anyf
4、requency from 25 to 800 Hz.At frequencies above 800 Hz,dielectric heating is a potential problem.1.3 This test method is intended to be used in conjunctionwith any ASTM standard or other document that refers to thistest method.References to this document need to specify theparticular options to be u
5、sed(see 5.5).1.4 It is suitable for use at various temperatures,and in anysuitable gaseous or liquid surrounding medium.1.5 This test method is not intended for measuring thedielectric strength of materials that are fluid under the condi-tions of test.1.6 This test method is not intended for use in
6、determiningintrinsic dielectric strength,direct-voltage dielectric strength,or thermal failure under electrical stress(see Test MethodD3151).1.7 This test method is most commonly used to determinethe dielectric breakdown voltage through the thickness of a testspecimen(puncture).It is also suitable f
7、or use to determinedielectric breakdown voltage along the interface between asolid specimen and a gaseous or liquid surrounding medium(flashover).With the addition of instructions modifying Sec-tion 12,this test method is also suitable for use for prooftesting.1.8 This test method is similar to IEC
8、Publication 243-1.Allprocedures in this method are included in IEC 243-1.Differ-ences between this method and IEC 243-1 are largely editorial.1.9 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
9、 establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.Specific hazard statements are given in Section 7.See also6.4.1.1.10 This international standard was developed in accor-dance with internationally recognized prin
10、ciples on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:4D374 Test Methods for Thickness of
11、Solid Electrical Insu-lation(Metric)D0374_D0374MD618 Practice for Conditioning Plastics for TestingD877 Test Method for Dielectric Breakdown Voltage ofInsulating Liquids Using Disk ElectrodesD1711 Terminology Relating to Electrical InsulationD2413 Practice for Preparation of Insulating Paper andBoar
12、d Impregnated with a Liquid DielectricD3151 Test Method for Thermal Failure of Solid ElectricalInsulating Materials Under Electric Stress(Withdrawn2007)51This test method is under the jurisdiction of ASTM Committee D09 onElectrical and Electronic Insulating Materials and is the direct responsibility
13、 ofSubcommittee D09.12 on Electrical Tests.Current edition approved Jan.1,2020.Published January 2020.Originallyapproved in 1922.Last previous edition approved in 2013 as D149 09(2013).DOI:10.1520/D0149-20.2Bartnikas,R.,Chapter 3,“High Voltage Measurements,”Electrical Propertiesof Solid Insulating M
14、aterials,Measurement Techniques,Vol.IIB,EngineeringDielectrics,R.Bartnikas,Editor,ASTM STP 926,ASTM,Philadelphia,1987.3Nelson,J.K.,Chapter 5,“Dielectric Breakdown of Solids,”ElectricalProperties of Solid Insulating Materials:Molecular Structure and ElectricalBehavior,Vol.IIA,Engineering Dielectrics,
15、R.Bartnikas and R.M.Eichorn,Editors,ASTM STP 783,ASTM,Philadelphia,1983.4For 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 we
16、bsite.5The 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 StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issu
