IEC/TS 61973-2012 高压直流电站(HVDC)声频噪声
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来源:标准资料网
【英文标准名称】:Highvoltagedirectcurrent(HVDC)substationaudiblenoise
【原文标准名称】:高压直流电站(HVDC)声频噪声
【标准号】:IEC/TS61973-2012
【标准状态】:现行
【国别】:国际
【发布日期】:2012-04-01
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/SC22F
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Audibility;Converters;Definitions;Directcurrent;Direct-currentpowertransmission;Electricenergydistribution;Electricpowersystems;Electricpowertransmission;Electricalengineering;Electronicengineering;Energytransmission;Highvoltage;High-voltagetechniques;Noise;Noiseemissions;Noiselevels;Powerelectronics;Semiconductordevices;Soundlevel;Soundlevels;Soundpower;Specification(approval);Symbols;Testing;Transformerstations(electrical)
【摘要】:
【中国标准分类号】:Z32
【国际标准分类号】:17_140_20;29_240_10;29_240_99
【页数】:82P;A4
【正文语种】:英语
Product Code:SAE AMS3901/3
Title:Yarn, Organic Fiber (Para-Aramid), High Modulus OY 390 (2689)/25.5 Tensile Strength 16.5 (114)/900 Tensile Modulus 1140 Denier, 0.6% Finish
Issuing Committee:Ams P Polymeric Materials Committee
Scope:【英文标准名称】:StandardTestMethodforMeasuringDimensionalChangesAssociatedwithProcessingMetalPowders
【原文标准名称】:与处理金属粉末相关测定尺寸变化的标准试验方法
【标准号】:ASTMB610-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:B09.02
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:absolute;dimensionalchange;compacting;comparativedimensionalchange;duesize;metalpowders;sintering;Dimensionalchange;Metalpowders;Powdermetallurgy(P/M)materials;Sintering;Size/sizedistributionanalysis
【摘要】:DimensionalChangeWhenCompactingandSinteringMetalPowders:Thedimensionalchangevalueobtainedunderspecifiedconditionsofcompactingandsinteringisamaterialcharacteristicinherentinthepowder.Thetestisusefulforqualitycontrolofthedimensionalchangeofametalpowdermixture,tomeasurecompositionalandprocessingchangesandtoguideintheproductionofPMparts.Theabsolutedimensionalchangemaybeusedtoclassifypowdersordifferentiateonetypeorgradefromanother,toevaluateadditionstoapowdermixtureortomeasureprocesschanges,andtoguideinthedesignoftooling.Thecomparativedimensionalchangeismainlyusedasaqualitycontroltesttomeasurevariationsbetweenalotorshipmentofmetalpowderandareferencepowderofthesamematerialcomposition.Factorsknowntoaffectsizechangearethebasemetalpowdergrade,typeandlot,particlesizedistribution,levelandtypesofadditionstothebasemetalpowder,amountandtypeoflubricant,greendensity,aswellasprocessingconditionsofthetestspecimen;heatingrate,sinteringtimeandtemperature,sinteringatmosphere,andcoolingrate.DimensionalChangeofVariousPMProcessingSteps:ThegeneralprocedureofmeasuringthedieoratestcompactbeforeandafteraPMprocessingstep,andcalculatingapercentdimensionalchangeisalsoadaptedforuseasaninternalprocessevaluationtesttoquantifygreenexpansion,repressingsizechange,heattreatmentchangesorotherchangesindimensionsthatresultfromamanufacturingoperation.1.1Thisstandardcoversatestmethodthatmaybeusedtomeasurethesumofthechangesindimensionsthatoccurwhenametalpowderisfirstcompactedintoatestspecimenandthensintered.1.2Thedimensionalchangeisdeterminedbyaquantitativelaboratoryprocedureinwhichthearithmeticdifferencebetweenthedimensionsofadiecavityandthedimensionsofasinteredtestspecimenproducedfromthatdieiscalculatedandexpressedasapercentgrowthorshrinkage.1.3Withtheexceptionofdensityvalues,forwhichtheg/cm3unitistheindustrystandard,thevaluesstatedininch-poundunitsaretoberegardedasthestandard.TheSIequivalentsshowninparentheses,havebeenconvertedinaccordancewithIEEE/ASTMStandardSI10,maybeapproximate,andareonlyforinformation.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H16
【国际标准分类号】:77_160
【页数】:4P.;A4
【正文语种】:英语
