1、Designation:D8240221Standard Specification forLess-Flammable Synthetic Ester Liquids Used in ElectricalApparatus1This standard is issued under the fixed designation D8240;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of la
2、st revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1NOTEIn Table 1,IEC 51125 was corrected editorially to IEC 61125 in the last entry right column and%was addedafter Dissipation factor(po
3、wer factor)at 60 Hz,max in the left column in November 2022.1.Scope1.1 This specification covers less-flammable(high firepoint)synthetic ester insulating liquids for use as a dielectricand cooling in new and existing electrical power apparatusincluding power and distribution transformers,switchgear,
4、andother associated equipment1.2 Synthetic ester insulating liquids differ from conven-tional mineral oil and other less-flammable(high fire point)liquids in that they are products derived from the chemicalreaction,processing,and physical treatments of a carboxylicacid and an alcohol.1.3 This specif
5、ication is intended to define synthetic esterelectrical insulating liquids that are compatible with typicalmaterials of construction of existing apparatus and are ex-pected to maintain their functional characteristics in theseapplications.The material described in this specification is notalways mis
6、cible with other electrical insulating liquids.Theuser should contact the manufacturer of the synthetic esterinsulating liquid for guidance in this respect.1.4 This specification applies only to unused synthetic esterinsulating liquids as received prior to any processing.The usershould contact the m
7、anufacturer of the equipment or liquid,orboth,if questions of recommended characteristics or liquidmaintenance procedures arise.1.5 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.6 This standard does not purport to address all
8、 of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.7 This international standard was developed in acco
9、r-dance with internationally recognized principles 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 St
10、andards:2D92 Test Method for Flash and Fire Points by ClevelandOpen Cup TesterD97 Test Method for Pour Point of Petroleum ProductsD117 Guide for Sampling,Test Methods,and Specificationsfor Electrical Insulating LiquidsD445 Test Method for Kinematic Viscosity of Transparentand Opaque Liquids(and Calc
11、ulation of Dynamic Viscos-ity)D923 Practices for Sampling Electrical Insulating LiquidsD924 Test Method for Dissipation Factor(or Power Factor)and Relative Permittivity(Dielectric Constant)of Electri-cal Insulating LiquidsD974 Test Method for Acid and Base Number by Color-Indicator TitrationD1275 Te
12、st Method for Corrosive Sulfur in Electrical Insu-lating LiquidsD1298 Test Method for Density,Relative Density,or APIGravity of Crude Petroleum and Liquid Petroleum Prod-ucts by Hydrometer MethodD1524 Test Method for Visual Examination of Used Elec-trical Insulating Liquids in the FieldD1533 Test Me
13、thod for Water in Insulating Liquids byCoulometric Karl Fischer TitrationD1816 Test Method for Dielectric Breakdown Voltage ofInsulating Liquids Using VDE ElectrodesD1903 Practice for Determining the Coefficient of Thermal1This specification is under the jurisdiction of ASTM Committee D27 onElectric
14、al Insulating Liquids and Gases and is the direct responsibility of Subcom-mittee D27.02 on Gases and Non-Mineral Oil Liquids.Current edition approved July 15,2022.Published August 2022.DOI:10.1520/D8240-22E01.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer
15、 Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in acc
16、ordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1Expansion of Electrical Insulating Liquids of PetroleumOrigin,and AskarelsD2129 Test Method for Color of Clear Electrical InsulatingLiquids(Platinum-Cobalt Scale)D2300 Test Method for Gassing of Electrical InsulatingLiquids Under Ele
