ASTM_D_1868_-_20.pdf

Designation:D186820Standard Test Method forDetection and Measurement of Partial Discharge(Corona)Pulses in Evaluation of Insulation Systems1This standard is issued under the fixed designation D1868;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.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1 This test method covers the detection and measurementof partial discharge(corona)pulses at the terminals of aninsulation system under an applied test voltage,including thedetermination of partial discharge(corona)inception andextinction voltages as the test voltage is raised and lowered.This test method is also useful in determining quantities suchas apparent charge and pulse repetition rate together with suchintegrated quantities as average current,quadratic rate,andpower.This test method is useful for test voltages ranging infrequency from zero(direct voltage)to approximately2000 Hz.1.2 This test method is directly applicable to a simpleinsulation system that can be represented as a two-terminalcapacitor(1),(2).21.3 This test method is also applicable to(distributedparameter)insulation systems such as high-voltage cable.Consideration must be given to attenuation and reflectionphenomena in this type of system.Further information ondistributed parameter systems of cables,transformers,androtating machines will be found in Refs(1-9).(See AEICCS5-87,IEEE C57 113-1991,IEEE C57 124-1991,and IEEE1434-2005.)1.4 This test method can be applied to multi-terminalinsulation systems,but at some loss in accuracy,especiallywhere the insulation of inductive windings is involved.1.5 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.Specific precaution statements are given in Sections 8 and 14.1.6 This international standard was developed in accor-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 Standards:3D149 Test Method for Dielectric Breakdown Voltage andDielectric Strength of Solid Electrical Insulating Materialsat Commercial Power FrequenciesD618 Practice for Conditioning Plastics for TestingD2275 Test Method for Voltage Endurance of Solid Electri-cal Insulating Materials Subjected to Partial Discharges(Corona)on the SurfaceD3382 Test Methods for Measurement of Energy and Inte-grated Charge Transfer Due to Partial Discharges(Co-rona)Using Bridge Techniques2.2 IEEE Standards4IEEE 48 Standard Test Procedures and Requirements forHigh Voltage Alternating Current Cable TerminationsIEEE 1434-2005 Guide to the Measurement of Partial Dis-charges in Rotating MachineryIEEE C57 113-1991 Guide for PD Measurement in Liquid-Filled Power Transformers and Shunt ReactorsIEEE C57 124-1991 Recommended Practice for the Detec-tion of PD and the Measurement of Apparent Charge inDry-Type Transformers2.3 Other Documents:AEIC CS5-87 Specifications for Thermoplastic and Cross-linked Polyethlene Insulated Shielded Power CablesRated 5 through 35 kV(9thEdition)October 198751This test method is under the jurisdiction of ASTM Committee D09 onElectrical and Electronic Insulating Materials and is the direct responsibility ofSubcommittee D09.12 on Electrical Tests.Current edition approved March 1,2020.Published March 2020.Originallyapproved in 1961.Last previous edition approved in 2013 as D1868 13.DOI:10.1520/D1868-20.2The boldface numbers in parentheses refer to the list of references at the end ofthis test method.3For 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.4Available from Institute of Electrical and Electronics Engineers,Inc.(IEEE),445 Hoes Ln.,Piscataway,NJ 08854-4141,http:/www.ieee.org.5Available from Association of Edison Illuminating Companies(AEIC),P.O.Box 2641,Birmingham,AL 35291-0992,http:/www.aeic.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 Recommendation