SAE AMS4410 Aluminum Alloy Plate (7081-T7451), 7.2Zn - 1.5Cu - 2.0Mg - 0.10Zr, Solution Heat Treated, Stress Relieved an
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来源:标准资料网
Product Code:SAE AMS4410
Title:Aluminum Alloy Plate (7081-T7451), 7.2Zn - 1.5Cu - 2.0Mg - 0.10Zr, Solution Heat Treated, Stress Relieved and Overaged
Issuing Committee:Ams D Nonferrous Alloys Committee
Scope:This specification covers an aluminum alloy in the form of plate.
【英文标准名称】:Acoustics-Determinationofsoundpowerlevelsandsoundenergylevelsofnoisesourcesusingsoundpressure-Engineeringmethodsforanessentiallyfreefieldoverareflectingplane(ISO3744:2010);GermanversionENISO3744:2010
【原文标准名称】:声学.声压法测定噪声源的声功率级.反射面上近似自由场的工程法(ISO3744-2010).德文版本ENISO3744-2010
【标准号】:ENISO3744-2010
【标准状态】:现行
【国别】:
【发布日期】:2011-02
【实施或试行日期】:
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:吸收;声学测量;声学试验;声学;校准;定义(术语);测定;护耳器;包络面法;环境;人类工效学;外部噪声;固定件;安装;数学计算;测量;测量持续时间;测量仪器;测量面;测量技术;方法;计算方法;传声器;噪声;噪声(环境的);噪声测量;噪声源;操作;精密度;反射的;房屋;声音;吸声;声场;声级;噪声值;声功率;声压;声源;规范(验收);标准差;试验设备;试验;试验条件
【英文主题词】:Absorption;Acousticmeasurement;Acoustictesting;Acoustics;Calibration;Definitions;Determination;Earprotectors;Envelopingsurfacemethods;Environment;Ergonomics;Externalnoise;Fixings;Installations;Mathematicalcalculations;Measurement;Measurementduration;Measuringinstruments;Measuringsurfaces;Measuringtechniques;Methods;Methodsofcalculation;Microphones;Noise;Noise(environmental);Noisemeasurements;Noisesources;Operation;Precision;Reflective;Rooms;Sound;Soundabsorption;Soundfields;Soundlevel;Soundlevels;Soundpower;Soundpressure;Soundsources;Specification(approval);Standarddeviation;Testequipment;Testing;Testingconditions
【摘要】:
【中国标准分类号】:Z32
【国际标准分类号】:17_140_01
【页数】:92P;A4
【正文语种】:英语
【英文标准名称】:Electromagneticcompatibility(EMC)-Part3-13:Limits-AssessmentofemissionlimitsfortheconnectionofunballancedinstallationstoMV,HVandEHVpowersystems
【原文标准名称】:电磁兼容性(EMC).第3-13部分:限值.不平衡装置对MV、HV和EHV动力系统的连接用排放限值的评估
【标准号】:IEC/TR61000-3-13-2008
【标准状态】:现行
【国别】:国际
【发布日期】:2008-02
【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/SC77A
【标准类型】:()
【标准水平】:()
【中文主题词】:评估;不对称的;定义;电气工程;电磁兼容性;EMC;闪光;低压电源;供电系统;非对称;电压波动
【英文主题词】:Assessment;Asymmetrical;Definitions;Electricalengineering;Electromagneticcompatibility;EMC;Flicker;Lowvoltagemains;Powersupplysystem;Unsymmetry;Voltagefluctuations
【摘要】:ThispartofIEC61000providesguidanceonprincipleswhichcanbeusedasthebasisfordeterminingtherequirementsfortheconnectionofunbalancedinstallations(i.e.three-phaseinstallationscausingvoltageunbalance)toMV,HVandEHVpublicpowersystems(LVinstallationsarecoveredinotherIECdocuments).Forthepurposesofthisreport,anunbalancedinstallationmeansathree-phaseinstallation(whichmaybealoadoragenerator)thatproducesvoltageunbalanceonthesystem.Theconnectionofsingle-phaseinstallationsisnotspecificallyaddressed,astheconnectionofsuchinstallationsisunderthecontrolofthesystemoperatororowner.Thegeneralprincipleshowevermaybeadaptedwhenconsideringtheconnectionofsingle-phaseinstallations.Theprimaryobjectiveistoprovideguidancetosystemoperatorsorownersonengineeringpractices,whichwillfacilitatetheprovisionofadequateservicequalityforallconnectedcustomers.Inaddressinginstallations,thisdocumentisnotintendedtoreplaceequipmentstandardsforemissionlimits.Thereportaddressestheallocationofthecapacityofthesystemtoabsorbdisturbances.Itdoesnotaddresshowtomitigatedisturbances,nordoesitaddresshowthecapacityofthesystemcanbeincreased.Sincetheguidelinesoutlinedinthisreportarenecessarilybasedoncertainsimplifyingassumptions,thereisnoguaranteethatthisapproachwillalwaysprovidetheoptimumsolutionforallunbalancedloadsituations.Therecommendedapproachshouldbeusedwithflexibilityandjudgmentasfarasengineeringisconcerned,whenapplyingthegivenassessmentproceduresinfullorinpart.Thesystemoperatororownerisresponsibleforspecifyingrequirementsfortheconnectionofinstallationswhichmaycauseunbalanceonthesystem.Thedisturbinginstallationistobeunderstoodasthecompletecustomer’sinstallation(i.e.includingbalancedandunbalancedparts).Problemsrelatedtounbalancefallintotwobasiccategories.?Unbalancedinstallationsthatdrawnegative-sequencecurrentswhichproducenegativesequencevoltagesonthesupplysystem.Examplesofsuchinstallationsincludearcfurnacesandtractionloads(typicallyconnectedtothepublicnetworkatHV),andthreephaseinstallationswheretheindividualloadsarenotbalanced(typicallyconnectedatMVandLV).Negative-sequencevoltagesuperimposedontotheterminalvoltageofrotatingmachinescanproduceadditionalheatlosses.Negative-sequencevoltagecanalsocausenon-characteristicharmonics(typicallypositive-sequence3rdharmonic)tobeproducedbypowerconverters.?Unbalancedinstallationsconnectedline-to-neutralcanalsodrawzero-sequencecurrentswhichcanbetransferredornotintothesupplysystemdependingonthetypeofconnectionofthecouplingtransformer.Theflowofzero-sequencecurrentsinagroundedneutralsystemcauseszero-sequenceunbalanceaffectingline-to-neutralvoltages.Thisisnotnormallycontrolledbysettingemissionlimits,butratherbysystemdesignandmaintenance.Ungrounded-neutralsystemsandphase-to-phaseconnectedinstallationsarenot,however,affectedbythiskindofvoltageunbalance.
【中国标准分类号】:L06
【国际标准分类号】:33_100_01
【页数】:44P.;A4
【正文语种】:英语
