DIN 336-1997 攻丝前钻孔用钻头直经
作者:标准资料网 时间:2024-05-01 17:59:22 浏览:8701
来源:标准资料网
【英文标准名称】:Drillsforusepriortotappingscrewthreads
【原文标准名称】:攻丝前钻孔用钻头直经
【标准号】:DIN336-1997
【标准状态】:作废
【国别】:德国
【发布日期】:1997-04
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:惠氏螺纹;螺纹;直径;标准螺纹;紧配合螺纹;尺寸;钻头;钻头;麻花钻;攻螺纹;丝锥;圆柱形;管螺纹;标准公差;工具;英制螺纹;米制的;ISO螺纹;螺纹孔;公差(测量);ISO米制螺纹;ISO微型螺纹;孔径;米制螺纹
【英文主题词】:
【摘要】:
【中国标准分类号】:J41
【国际标准分类号】:25_100_30;25_100_50
【页数】:12P;A4
【正文语种】:德语
【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】:StandardClassificationforServiceabilityofanOfficeFacilityforProtectionofOccupantAssets
【原文标准名称】:办公设备对办公人员财产保护的适用性标准分类
【标准号】:ASTME1693-1995
【标准状态】:现行
【国别】:美国
【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(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:要求;分类;建筑材料;性能;办公设备适用性;办公设备适用性;分类标准;小型设备;设备使用者;隔板墙;建筑物设备;办公环境;等级标度;安全区;财产保护;办公人员资产保护;办公人员资产保护;适用性;应用;建筑物;建筑工程;材
【英文主题词】:Buildingmaterials;Buildings;Classification;Constructions;Materials;Officeequipment;Performance;Performancetests;Requirements;Securities;Serviceability;Use
【摘要】:
【中国标准分类号】:Y54
【国际标准分类号】:35_260
【页数】:15P;A4
【正文语种】:英语
