DIN VDE 0641-3-1984 交流不超过415V、直流不超过440V和额定电流不超过63A的小型断路器
时间:2024-05-20 06:08:06 来源: 标准资料网 作者：标准资料网 阅读：8567
【英文标准名称】:Miniaturecircuitbreakersupto63Aratedcurrent,upto415Va.c.andupto440Vd.c.[VDESpcification]
【原文标准名称】:交流不超过415V、直流不超过440V和额定电流不超过63A的小型断路器
【标准号】:DINVDE0641-3-1984
【标准状态】:作废
【国别】:德国
【发布日期】:1984-04
【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】:控制图;电驱动装置;规范(验收);小型断路器;电气工程;直流电流;计数检查;试验;特性;断路器;开关
【英文主题词】:circuitbreakers;miniaturecircuit-breakers;inspectionbyattributes;directcurrent;testing;electricalengineering;switches;specification(approval);electrically-operateddevices;circuit-breakers;cont
【摘要】:
【中国标准分类号】:K31
【国际标准分类号】:29_120_40
【页数】:7P;A4
【正文语种】:德语
【英文标准名称】:Copperandcopperalloys.Generaltechnicalrequirementsofsupplyofsemi-finishedproducts.
【原文标准名称】:铜和铜合金.半成品供应的一般技术要求
【标准号】:NFA01-111-1986
【标准状态】:现行
【国别】:法国
【发布日期】:1986-09-01
【实施或试行日期】:1986-09-05
【发布单位】:法国标准化协会(AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:合格试验;采办;铜合金;铜;交付;采购;一般条件;定单;文献;鉴定试验;试验;半成品;协议
【英文主题词】:
【摘要】:
【中国标准分类号】:H62
【国际标准分类号】:77_150_30
【页数】:8P;A4
【正文语种】:其他
【英文标准名称】:Informationprocessingsystems-FibreDistributedDataInterface(FDDI)-Mediaaccesscontrol-2(MAC-2)
【原文标准名称】:信息处理系统.光纤分布式数据接口(FDDI).介质存取控制-2(MAC-2)
【标准号】:BSISO/IEC9314-8-1998
【标准状态】:现行
【国别】:英国
【发布日期】:1998-12-15
【实施或试行日期】:1998-12-15
【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】:纤维光学;数据传输方法;光纤分布数据接口(FIBERDISTRIBUTEDDATAINTERFACE);数据传输;开放系统互连;计算机网络;地址(数据处理);纤维光缆;语义学;信息交流;接口;权标环网;数据链路层;物理层(开放系统互连);光纤
【英文主题词】:Communicationprocedures;Controlprocedures;Datainterface;Dataprocessing;Datatransmission;Definition;Definitions;FDDI;Informationinterchange;Informationtechnology;Interfaces;Interfaces(dataprocessing);MAC;Networkinterconnection;Opticalfibres;Opticalwaveguides;Tokenring
【摘要】:ThispartofISO/IEC9314specifiestheMediaAccessControl(MAC),themiddlesublayeroftheDataLinkLayer(DLL),forFibreDistributedDataInterface(FDDI).FDDI(ISO/IEC9314)providesahigh-bandwidth(100Mbit/s),general-purposeinterconnectionamonginformationprocessingsystems,subsystemsandperipheralequipment,usingfibreopticsorothertransmissionmedia.FDDIcanbeconfiguredtosupportasustaineddatatransferrateofatleast80Mbit/s(10Mbyte/s).FDDIprovidesconnectivityformanynodesdistributedoverdistancesofmanykilometresinextent.CertaindefaultparametervaluesforFDDI(e.g.timersettings)arecalculatedonthebasisofupto1000transmissionlinksorupto200kmtotalfibrepathlength(typicallycorrespondingto500nodesand100kmofdualfibrecable,respectively);however,theFDDIprotocolscansupportmuchlargernetworksbyincreasingtheseparametervalues.Asshowninfigure1,ISO/IEC9314consistsofa)APhysicalLayer(PL),whichisdividedintotwosublayers:1)APhysicalMediumDependent(PMD),whichprovidesthedigitalbasebandpoint-to-pointcommunicationbetweennodesintheFDDInetwork.ThePMDprovidesallservicesnecessarytotransportasuitablycodeddigitalbitstreamfromnodetonode.ThePMDdefinesandcharacterizesthefibre-opticdriversandreceivers,medium-dependentcoderequirements,cables,connectors,powerbudgets,opticalbypassprovisions,andphysical-hardware-relatedcharacteristics.ItspecifiesthepointofinterconnectabilityforconformingFDDIattachments.TheinitialPMDstandard,ISO/IEC9314-3,definesattachmenttomulti-modefibre.AdditionalPMDsublayerstandardsarebeingdevelopedforattachmenttosingle-modefibreandSONET.2)APhysicalLayerProtocol(PHY),whichprovidesconnectionbetweenthePMDandtheDataLinkLayer.PHYestablishesclocksynchronizationwiththeupstreamcode-bitdatastreamanddecodesthisincomingcode-bitstreamintoanequivalentsymbolstreamforusebythehigherlayers.PHYprovidesencodinganddecodingbetweendataandcontrolindicatorsymbolsandcodebits,mediumconditioningandinitializing,thesynchronizationofincomingandoutgoingcode-bitclocks,andthedelineationofoctetboundariesasrequiredforthetransmissionofinformationtoorfromhigherlayers.InformationtobetransmittedonthemediumisencodedbythePHYusingagrouptransmissioncode.b)ADataLinkLayer(DLL),whichisdividedintotwoormoresublayers:1)AnoptionalHybridRingControl(HRC),whichprovidesmultiplexingofpacketandcircuitswitcheddataonthesharedFDDImedium.HRCcomprisestwointernalcomponents,aHybridMultiplexer(H-MUX)andanisochronousMAC(I-MAC).H-MUXmaintainsasynchronous125μscyclestructureandmultiplexesthepacketandcircuitswitcheddatastreams,andI-MACprovidesaccesstocircuitswitchedchannels.2)AMediaAccessControl(MAC),whichprovidesfairanddeterministicaccesstothemedium,addressrecognition,andgenerationandverificationofframechecksequences.Itsprimaryfunctionisthedeliveryofpacketdata,includingframegeneration,repetition,andremoval.ThedefinitionofMACiscontainedinthispartoflSO/IEC9314.3)AnoptionalLogicalLinkControl(LLC),whichprovidesacommonprotocolforanyrequiredpacketdataadaptationservicesbetweenMACandtheNetworkLayer.LLCisnotspecifiedbyFDDI.4)AnoptionalCircuitSwitchingMultiplexer(CS-MUX),whichprovidesacommonprotocolforanyrequiredcircuitdataadaptationservicesbetweenI-MACandtheNetworkLayer.CS-MUXisnotspecifiedbyFDDI.c)AStationManagement(SMT),whichprovidesthecontrolnecessaryatthenodeleveltomanagetheprocessesunderwayinthevariousFDDIlayerssuchthatanodemayworkcooperativelyonaring.SMTprovidesservicessuchascontrolofconfigurationmanagement,faultisolationandrecovery,a
【中国标准分类号】:L65
【国际标准分类号】:33_180_01;35_110
【页数】:108P.;A4
【正文语种】:英语