ASTM_D_1868_-_13.pdf

Designation:D186813Standard 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.The test method is also useful in determining quantities such asapparent charge and pulse repetition rate together with suchintegrated quantities as average current,quadratic rate andpower.The test method is useful for test voltages ranging infrequency from zero(direct voltage)to approximately 2000Hz.1.2 The test method is directly applicable to a simpleinsulation system that can be represented as a two-terminalcapacitor(1),(2).1.3 The test method is also applicable to(distributed param-eter)insulation systems such as high-voltage cable.Consider-ation must be given to attenuation and reflection phenomena inthis type of system.Further information on distributed param-eter systems of cables,transformers,and rotating machines willbe found in Refs.(1),(2),(3),(4),(5),(6),(7),(8),and(9).2(See AEIC CS5-87,IEEE C57 113-1991,IEEE C57 124-1991,and IEEE 1434-2005.)1.4 The test method can be applied to multi-terminal insu-lation systems,but at some loss in accuracy,especially wherethe insulation of inductive windings is involved.1.5 This standard does not purport to address all of thesafety problems,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 precautionstatements are given in Sections 8 and 14.2.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 Other Documents:AEIC CS5-87 Specifications for Thermoplastic and Cross-linked Polyethlene Insulated Shielded Power CablesRated 5 through 35 kV(9thEdition)October 19874ICEA T-24-380 Guide for Partial Discharge Procedure5IEEE 48 Standard Test Procedures and Requirements forHigh Voltage Alternating Current Cable Terminations6IEEE 1434-2005 Guide to the Measurement of Partial Dis-charges in Rotating Machinery6IEEE C57 113-1991 Guide for PD Measurement in Liquid-Filled Power Transformers and Shunt Reactors6IEEE C57 124-1991 Recommended Practice for the Detec-tion of PD and the Measurement of Apparent Charge inDry-Type Transformers63.Terminology3.1 Definitions:1This 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 Nov.1,2013.Published December 2013.Originallyapproved in 1961.Last previous edition approved in 2007 as D1868 07.DOI:10.1520/D1868-13.2The 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 the publication department of the Association of EdisonIlluminating Companies,600 N.18th St.,PO Box 2641,Birmingham,AL35291-0992.5Available from the Insulated Cable Engineers Association,Inc.,PO Box 440,South Yarmouth,MA 02664.6Available from Institute of Electrical and Electronics Engineers,Inc.(IEEE),445 Hoes Ln.,P.O.Box 1331,Piscataway,NJ 08854-1331,http:/www.ieee.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 The following terms are presented in a developingsequence;it is best that they be read in their entirety:3.1.2 ionizationthe process by which electrons are lostfrom or transferred to neutral molecules or atoms to formpositively or negatively charged particles.3.1.3 partial discharge(corona)an electrical dischargethat on