DIN 40900 T.13-1981 电路图图形符号.模拟信息处理.接线符号和标志

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【英文标准名称】:Graphicalsymbolsfordiagrams;analogueelements
【原文标准名称】:电路图图形符号.模拟信息处理.接线符号和标志
【标准号】:DIN40900T.13-1981
【标准状态】:作废
【国别】:
【发布日期】:
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:
【国际标准分类号】:
【页数】:
【正文语种】:


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【英文标准名称】:Electricalinstallationsofshipsandmobileandfixedoffshoreunits-Proceduresforcalculatingshort-circuitcurrentsinthree-phasea.c
【原文标准名称】:船舶和移动式及固定式近海装置的电气设施.三相交流短路电流计算程序
【标准号】:BSIEC61363-1-2002
【标准状态】:现行
【国别】:英国
【发布日期】:2002-08-14
【实施或试行日期】:2002-08-14
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:电力设备;数学计算;短路电流;电气设备;船舶设备;电气工程;近海建设工程
【英文主题词】:Electricalengineering;Electricalequipment;Electricalinstallations;Mathematicalcalculations;Offshoreconstructionworks;Ship'sequipment;Short-circuitcurrents
【摘要】:ThisInternationalStandardoutlinesproceduresforcalculatingshort-circuitcurrentsthatmayoccuronamarineoroffshorea.c.electricalinstallation.Thecalculationmethodsareforuseonunmeshedthree-phasealternatingcurrentsystems,a)operatingat50Hzor60Hz;b)havinganysystemvoltagespecifiedinIEC60092-201table2;c)havingoneormoredifferentvoltagelevels;d)comprisinggenerators,motors(bothsynchronousandasynchronous),transformers,reactorcoils,cables,andconverterunits;e)havingtheirneutralpointconnectedtotheship'shullthroughanimpedance(designedtolimittheshort-circuitcurrentflowingtotheship'shull);f)havingtheirneutralpointisolatedfromtheship'shull.Thecalculationproceduresareforathree-phasesymmetricalshort-circuitconditioni.e.three-phaseconductorsshortedtogether,orshortedtotheship'shullandforwhichtheshort-circuitoccursonallthreepolessimultaneously.Thecalculationofshort-circuitcurrentsresultingfromasymmetricshort-circuitconditionscanleadtohigheraperiodic(d.c.)componentsoftheshort-circuitcurrentandisnotconsideredinthisstandard.Thecalculatingformulaeandmethodsdescribedproducesufficientlyaccurateresultstocalculatetheshort-circuitcurrentduringthefirst100msofafaultcondition.Theycanbeusedtocalculatetheshort-circuitcurrentforperiodslongerthan100mswhencalculatingonabussystemtowhichthegeneratorsaredirectlyconnected.Fortimeperiodsbeyond100msthecontrollingeffectsofthesystemvoltageregulatorsmaybepredominant.Calculationsincludingthevoltageregulatoreffectsarenotconsideredinthisstandard.Theobjectofthisstandardistopresentformulaeforcalculatingshort-circuitcurrentsoftheactivecomponentsofanelectricalsystemandtoindicatehowsuchformulaemaybesimplifiedwhencalculatingtheshort-circuitcurrentatvariouslocationsontheelectricalsystem.Thecalculationsgiveestimatesoftheprospectiveshort-circuitcurrentwhenthesystem'sactivecomponentsproducetheirmaximumcontribution.Thecalculatingformulaearedevelopedfrombasicelectricalengineeringtheoriesrelevanttothesystemcomponents.Tosimplifythecalculationmethodsyetretainanacceptablelevelofaccuracyintheresults,suitableassumptionsareoutlinedandtheireffectsonthecalculationresultsindicated.Thisstandardprovidesacalculationprocedure.Itgivesguidanceontheinterpretationandapplicationofsimplifyingformulaeandthecorrespondingresultswhenappliedtotheselectionofswitchgear.Thestandardisnotintendedtoprovideanyotherinformationotherthanthecalculationoftheshort-circuitcurrentwhichmayflowinthenetwork.Inordertounderstandthemethods,andconsequencesoftheresults,itisassumedthatthepersonresponsibleforinitiatingtheshort-circuitcurrentcalculations,isthoroughlyfamiliarwithvalidelectricalengineeringfundamentals.
【中国标准分类号】:U60
【国际标准分类号】:47_020_60
【页数】:44P;A4
【正文语种】:英语


【英文标准名称】:StandardTestMethodforSorptionofBibulousPaperProducts(SorptiveRateandCapacityUsingGravimetricPrinciples)
【原文标准名称】:吸水纸制品吸附作用的标准试验方法(用重力原理测定吸附率和容量)
【标准号】:ASTMD5802-1995(2001)
【标准状态】:作废
【国别】:
【发布日期】:1995
【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】:D06.92
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:重力原理;吸水纸制品;吸附;吸附容量;吸附率;吸水纤维制品;重力测定法;试验;纸
【英文主题词】:absorbency;absorptivecapacity;absorptiverate;demandwettability;paper;paperboard
【摘要】:Theabsorptivecharacteristics,bothrateandcapacity,areofgreatimportanceincrepedtissuepapersmadeforuseasabsorbentsanitarytissueproducts,suchastowelingandtissue.Theabsorptivecharacteristics,both
【中国标准分类号】:Y33
【国际标准分类号】:85_060
【页数】:5P.;A4
【正文语种】: