ISO 2115-1974 塑料.聚合物和共聚物的含水分散体"白点”温度和最低薄膜形成温度的测定

上一篇: ISO 3146-1974 塑料.半晶状聚合物的熔化性能的测定(熔化温度或熔化区域)
下一篇: ISO 2028-1974 橡胶.合成胶乳.干聚合物的制备

【英文标准名称】:Short-circuitcurrentsind.c.auxiliaryinstallationsinpowerplantsandsubstations-Part1:Calculationofshort-circuitcurrents
【原文标准名称】:电厂与变电站直流辅助设施中的短路电流第1部分:短路电流的计算
【标准号】:IEC61660-1-1997
【标准状态】:现行
【国别】:国际
【发布日期】:1997-06
【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/TC73
【标准类型】:()
【标准水平】:()
【中文主题词】:数学计算;电气工程;定义;计算方法;开关设备;发电站;变电所;直流装置;短路电流
【英文主题词】:Bridgecircuits;Circuits;Definitions;Directcurrent;Directcurrentinstallations;Electricconvertors;Electricpowernetworks;Electricpowerstations;Electricalengineering;Faultcurrents;Mathematicalcalculations;Methodsofcalculation;Plant;Shortcircuitimpedance;Shortcircuits;Short-circuitcurrents;Substation;Switchgears;Symbols;Three-phase
【摘要】:ThispartofIEC61660describesamethodforcalculatingshort-circuitcurrentsind.c.auxiliarysystemsinpowerplantsandsubstations.Suchsystemscanbeequippedwiththefollowingequipment,actingasshort-circuitcurrentsources:-rectifiersinthree-phasea.c.bridgeconnectionfor50Hz;-stationarylead-acidbatteries;-smoothingcapacitors;-d.c.motorswithindependentexcitation.NOTE-Rectifiersinthree-phasea.c.bridgeconnectionfor60Hzareunderconsideration.Thedataofotherequipmentmaybegivenbythemanufacturer.Thisstandardisonlyconcernedwithrectifiersinthree-phasea.c.bridgeconnection.Itisnotconcernedwithothertypesofrectifiers.Thepurposeofthestandardistoprovideagenerallyapplicablemethodofcalculationwhichproducesresultsofsufficientaccuracyontheconservativeside.Specialmethods,adjustedtoparticularcircumstances,maybeusediftheygiveatleastthesameprecision.Short-circuitcurrents,resistancesandinductancesmayalsobeascertainedfromsystemtestsormeasurementsonmodelsystems.Inexistingd.c.systemsthenecessaryvaluescanbeascertainedfrommeasurementstakenattheassumedshort-circuitlocation.Theloadcurrentisnottakenintoconsiderationwhencalculatingtheshort-circuitcurrent.Itisnecessarytodistinguishbetweentwodifferentvaluesofshort-circuitcurrent:-themaximumshort-circuitcurrentwhichdeterminestheratingoftheelectricalequipment;-theminimumshort-circuitcurrentwhichcanbetakenasthebasisforfuseandprotectionratingsandsettings.
【中国标准分类号】:F20
【国际标准分类号】:29_240_01
【页数】:69P.;A4
【正文语种】:英语


【英文标准名称】:Entertainmenttechnology-Practicaltypes-Part1:Woodenramps,cornerramps,bevels,cornerbevels
【原文标准名称】:实用型娱乐技术.第1部分:木制斜坡,角落斜坡,斜面,角落斜面
【标准号】:DIN15920-1-2011
【标准状态】:现行
【国别】:德国
【发布日期】:2011-11
【实施或试行日期】:2011-11-01
【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】:Bodies;Definitions;Designations;Dimensions;Entertainmenttechnology;Platforms;Ramps;Stagesetups;Stages;Studios;Wood
【摘要】:
【中国标准分类号】:P33
【国际标准分类号】:97_200_10
【页数】:28P;A4
【正文语种】:德语