ASTM D1711-2008 Standard Terminology Relating to Electrical Insulation《电气绝缘的相关标准术语》.pdf
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1、Designation: D 1711 08An American National StandardStandard Terminology Relating toElectrical Insulation1This standard is issued under the fixed designation D 1711; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last r
2、evision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.INTRODUCTIONThis terminology is used in connection with testing and specifying solid electrical insulatingmaterials. Modifications to th
3、is terminology, reflecting common usage, may appear in particular testmethods, material specifications, practices, or other standards. Included herein are terms pertinent togeneral applications, electrical insulating papers, mica, mica processing, processed mica forms,hookup wire insulation, and par
4、tial discharge (corona).1. Scope*1.1 This terminology is a compilation of technical termsused in conjunction with testing and specifying solid electricaland electronic insulating materials in standards under thejurisdiction of Committee D09 on Electrical and ElectronicInsulating Materials.1.2 It is
5、intended that all definitions in this terminology areidentical to definitions of the same terms as printed in standardsof originating technical subcommittees, with the exceptions of:(1) deletion of any part of the Discussion included in anotherstandard that refers specifically to the use of a term i
6、n thatstandard; (2) figure numbers and corresponding references; and(3) in this terminology, a parenthetical addition of a referenceto one or more technical standards in which the term is usedand the year in which the term was added to this compilation.1.3 It is permissible to include symbols as par
7、t of therepresentation of terms, where appropriate.1.4 It is not intended that this terminology include descrip-tions of terms or symbols (except as noted in 1.3). It is alsopermissible to include acronyms and abbreviations referringdirectly to defined terms.1.5 Revisions and additions to the defini
8、tions in this termi-nology are to be made as a product of a collaborative effortbetween Subcommittee D09.94 and the various technicalsubcommittees of Committee D09, with Subcommittee D09.94providing editorial advice to the technical subcommittees. Newdefinitions and revisions of existing definitions
9、 must first beapproved by the cognizant technical subcommittee (or subcom-mittees) before inclusion in this terminology.2. Referenced Documents2.1 ASTM Standards:2D 149 Test Method for Dielectric Breakdown Voltage andDielectric Strength of Solid Electrical Insulating Materialsat Commercial Power Fre
10、quenciesD 150 Test Methods for AC Loss Characteristics and Per-mittivity (Dielectric Constant) of Solid Electrical Insula-tionD 3426 Test Method for Dielectric Breakdown Voltage andDielectric Strength of Solid Electrical Insulating MaterialsUsing Impulse WavesD 3636 Practice for Sampling and Judging
11、 Quality of SolidElectrical Insulating Materials2.2 Other Standards:ANSI/ASQC A2-198733. Terminologyacceptable quality level (AQL), nthe maximum percentnonconforming which, for purposes of sampling inspection,is considered satisfactory as a process average.acceptance number, nthe maximum allowable n
12、umber ofnonconformities for a given AQL and sample size (lot-sample size).air chain, nin mica, a series of air inclusions in the form ofa chain or streak.arc propagation, nthe movement of an electric arc from itspoint of inception to another location. (1996) D 3032arc tracking, nthe process producin
13、g tracks when arcs occur1This terminology is under the jurisdiction of ASTM Committee D09 onElectrical and Electronic Insulating Materials and is the direct responsibility ofSubcommittee D09.94 on Editorial.Current edition approved May 1, 2008. Published June 2008. Originallyapproved in 1960. Last p
14、revious edition approved in 2002 as D 1711 02.2For 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.3Available from
15、 American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.on or c
16、lose to the insulation surface.Arrhenius plot, na graph of the logarithm of thermal life asa function of the reciprocal of absolute temperature.DISCUSSIONThis is normally depicted as the best straight line fit,determined by least squares, of end points obtained at aging tempera-tures. It is importan
17、t that the slope, which is the activation energy of thedegradation reaction, be approximately constant within the selectedtemperature range to ensure a valid extrapolation.ash content of paper, nthe solid residue remaining aftercombustion of the paper under specified conditions, ex-pressed as a perc
18、entage of the dry mass of the original paper.(1996) D 202average discharge (corona) current (It), nthe sum of theabsolute magnitudes of the individual discharges during acertain time interval divided by that time interval.DISCUSSIONWhen the discharges are measured in coulombs and thetime interval in
19、 seconds, the calculated current will be in amperes.It5(t0t1Q11 Q21222222Qnt12 t0(1)where:It= average current, A,t0= starting time, s,t1= completion time, s, andQ1,Q2,Qn= partial discharge quantity in a corona pulse1 through n,C.binder tapesee core wrap (binder tape).bond strength, na measure of the
20、 force required to separatesurfaces which have been bonded together. (1996)D 2519, D 3145, D 4882braid, n(1) woven metallic wire used as a shield forinsulated conductors and cables.(2) A woven fibrous protective outer covering over aninsulated conductor or cable.breakdown voltagesee dielectric break
21、down voltage.bursting strength of paper, nthe hydrostatic pressure re-quired to produce rupture of a circular area of the materialunder specified test conditions. (1996) D 202cable wrap, npaper used for mechanical protection or forspace-filling (rather than as electrical insulation) in low-voltage c
22、ables with nonmetallic sheaths.capacitance, C, nthat property of a system of conductorsand dielectrics which permits the storage of electricallyseparated charges when potential differences exist betweenthe conductors.DISCUSSIONCapacitance is the ratio of a quantity, q, of electricity toa potential d
23、ifference, V. A capacitance value is always positive. Theunits are farads when the charge is expressed in coulombs and thepotential in volts:C 5 q/V (2)capacitor tissue, nvery thin (5 to 50 m) pure, nonporouspaper used as the dielectric in capacitors, usually in conjunc-tion with an insulating liqui
24、d.coating powder, na heat-fusible, finely-divided solid resin-ous material used to form electrical insulating coatings.(1996) D 2967, D 3214concentricity, nthe ratio, expressed in percent, of the mini-mum wall thickness to the maximum wall thickness.concentric-lay conductor, na conductor composed of
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