SAE AMS5693 Steel, Corrosion Resistant, Wire 18Cr - 9.0Ni Cyrogenically Produced, High Tensile Strength
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来源:标准资料网
Product Code:SAE AMS5693
Title:Steel, Corrosion Resistant, Wire 18Cr - 9.0Ni Cyrogenically Produced, High Tensile Strength
Issuing Committee:Ams F Corrosion Heat Resistant Alloys Committee
Scope:This specification covers a corrosion resistant steel in the form of round, square, and rectangular wire.
【英文标准名称】:Commontestmethodsforcablesunderfireconditions-Testforverticalflamespreadofvertically-mountedbunchedwiresorcables-Part2-4:Procedures;CategoryC;GermanversionEN50266-2-4:2001
【原文标准名称】:电缆通用着火试验方法.垂直安装的成股电线和电缆的垂直火焰扩散试验.第2-4部分:过程.C类.
【标准号】:EN50266-2-4-2001
【标准状态】:现行
【国别】:
【发布日期】:2001-09
【实施或试行日期】:2001-09-01
【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】:绝缘线;塑料;光束;火焰扩散;试验;电缆;电缆;燃烧特性;成股电缆;定义;焊料扩散测量法;电气工程;垂直;试验设备;纤维;燃烧试验;合格试验;混合气体;电线;阻燃性;耐火性;耐火性;电缆束
【英文主题词】:Bunchedcables;Bundles;Burningbehaviours;Cablebundles;Cables;Definition;Definitions;Electriccables;Electricalcords;Electricalengineering;Fibres;Firegas;Fireresistance;Firetests;Flamepropagation;Flameresistance;Gasmixtures;Insulatedcords;Plastics;Qualificationtests;Solder-spreadmeasurements;Testequipment;Testing;Vertical
【摘要】:
【中国标准分类号】:K13
【国际标准分类号】:13_220_40;29_060_20
【页数】:12P.;A4
【正文语种】:英语
【英文标准名称】:Short-circuitcurrentsinthree-phasea.c.systems-Calculationofcurrents
【原文标准名称】:三相交流系统内短路电流.电流的计算
【标准号】:BSEN60909-0-2001
【标准状态】:现行
【国别】:英国
【发布日期】:2001-10-26
【实施或试行日期】:2001-10-26
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:电力设备;交流电流;故障电流;电流;三相电流;短路电流;低压设备;高压设备
【英文主题词】:Alternatingcurrent;Currents;Definition;Definitions;Electricpowernetworks;Electricalengineering;Electrically-operateddevices;Faultcurrents;Highvoltage;Lowvoltage;Mathematicalcalculations;Properties;Shortcircuitimpedance;Shortcircuits;Short-circuitcurrents;Symbols;Three-phasecurrent;Three-phasenetworks
【摘要】:ThispartofIEC60909isapplicabletothecalculationofshort-circuitcurrents:·inlow-voltagethree-phasea.c.systems·inhigh-voltagethree-phasea.c.systemsoperatingatanominalfrequencyof50Hzor60Hz.Systemsathighestvoltagesof550kVandabovewithlongtransmissionlinesneedspecialconsideration.ThispartofIEC60909establishesageneral,practicableandconciseprocedureleadingtoresults,whicharegenerallyofacceptableaccuracy.Forthiscalculationmethod,anequivalentvoltagesourceattheshort-circuitlocationisintroduced.Thisdoesnotexcludetheuseofspecialmethods,forexamplethesuperpositionmethod,adjustedtoparticularcircumstances,iftheygiveatleastthesameprecision.Thesuperpositionmethodgivestheshort-circuitcurrentrelatedtotheoneloadflowpresupposed.Thismethod,therefore,doesnotnecessarilyleadtothemaximumshort-circuitcurrent.ThispartofIEC60909dealswiththecalculationofshort-circuitcurrentsinthecaseofbalancedorunbalancedshortcircuits.Incaseofanaccidentalorintentionalconductivepathbetweenonelineconductorandlocalearth,thefollowingtwocasesmustbeclearlydistinguishedwithregardtotheirdifferentphysicalpropertiesandeffects(resultingindifferentrequirementsfortheircalculation):·line-to-earthshortcircuit,occurringinasolidlyearthedneutralsystemoranimpedanceearthedneutralsystem;·asingleline-to-earthfault,occurringinanisolatedneutralearthedsystemoraresonanceearthedneutralsystem.Thisfaultisbeyondthescopeof,andisthereforenotdealtwithin,thisstandard.Forcurrentsduringtwoseparatesimultaneoussingle-phaseline-to-earthshortcircuitsinanisolatedneutralsystemoraresonanceearthedneutralsystem,seeIEC60909-3.Short-circuitcurrentsandshort-circuitimpedancesmayalsobedeterminedbysystemtests,bymeasurementonanetworkanalyzer,orwithadigitalcomputer.Inexistinglow-voltagesystemsitispossibletodeterminetheshort-circuitimpedanceonthebasisofmeasurementsatthelocationoftheprospectiveshortcircuitconsidered.Thecalculationoftheshort-circuitimpedanceisingeneralbasedontherateddataoftheelectricalequipmentandthetopologicalarrangementofthesystemandhastheadvantageofbeingpossiblebothforexistingsystemsandforsystemsattheplanningstage.Ingeneral,twoshort-circuitcurrents,whichdifferintheirmagnitude,aretobecalculated:·themaximumshort-circuitcurrentwhichdeterminesthecapacityorratingofelectricalequipment;and·theminimumshort-circuitcurrentwhichcanbeabasis,forexample,fortheselectionoffuses,forthesettingofprotectivedevices,andforcheckingtherun-upofmotors.NOTEThecurrentinathree-phaseshortcircuitisassumedtobemadesimultaneouslyinallpoles.Investigationsofnon-simultaneousshortcircuits,whichmayleadtohigheraperiodiccomponentsofshort-circuitcurrent,arebeyondthescopeofthisstandard.Thisstandarddoesnotcovershort-circuitcurrentsdeliberatelycreatedundercontrolledconditions(short-circuittestingstations).ThispartofIEC60909doesnotdealwiththecalculationofshort-circuitcurrentsininstallationsonboardshipsandaeroplanes.
【中国标准分类号】:K04
【国际标准分类号】:17_220_01
【页数】:74P.;A4
【正文语种】:英语
