BS EN 12450-1999 铜和铜合金.圆铜无缝毛细管

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【英文标准名称】:Low-voltageswitchgearandcontrolgear-Contactorsandmotor-starters-Electromechanicalcontactorsandmotor-starters
【原文标准名称】:低压开关设备和控制设备规范.连接器和起动器.电动机械连接器和起动器
【标准号】:BSEN60947-4-1-2001
【标准状态】:现行
【国别】:英国
【发布日期】:2001-08-15
【实施或试行日期】:2001-09-15
【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】:开关设备;低压电器;电控制设备;接触器;电驱动装置;电起动器;防护电气设备;低电压;机电装置;电气设备
【英文主题词】:Abilitytoswitch;Applications;Auxiliarycontactors;Characteristics;Classification;Classificationsystems;Contactorrelays;Contactors;Contactorsformotors;Controldevices;Criterion;Definitions;Degreeofsharpness;Electricmotors;Electricstarters;Electricalengineering;Electromagneticcompatibility;Electromechanical;Electromechanicaldevices;Electronic;Electronicengineering;EMC;Frequencies;Handlings;Inscription;Inserts;Inspection;Installations;Instructionsforuse;Interferencerejections;Interferingemissions;Letterings;Lowvoltage;Low-voltageequipment;Low-voltageswitchgear;Maintenance;Marking;Miscellaneousfunctions;Motorstarters;Operatinginstructions;Operation;Overloadprotection;Overloadrelays;Productinformation;Properties;Radiation;Set-upinstructions;Short-circuitprotection;Shutdown;Specification(approval);Starters;Switchgear;Switchgears;Switchingpower;Take-off;Testing
【摘要】:ThispartofIEC60947appliestothetypesofequipmentlistedin1.1and1.2whosemaincontactsareintendedtobeconnectedtocircuitstheratedvoltageofwhichdoesnotexceed1000Va.c.or1500Vd.c.Startersand/orcontactorsdealtwithinthisstandardarenotnormallydesignedtointerruptshort-circuitcurrents.Therefore,suitableshort-circuitprotection(see9.3.4)shallformpartoftheinstallationbutnotnecessarilyofthecontactororthestarter.Inthiscontext,thisstandardgivesrequirementsfor:-contactorsassociatedwithoverloadand/orshort-circuitprotectivedevices;-startersassociatedwithseparateshort-circuitprotectivedevicesand/orwithseparateshort-circuitandintegratedoverloadprotectivedevices;-contactorsorstarterscombined,underspecifiedconditions,withtheirownshort-circuitprotectivedevices.Suchcombinations,e.g.combinationstarters(see3.2.7)orprotectedstarters(see3.2.8)areratedasunits.Circuit-breakersandfuse-combinationunitsusedasshort-circuitprotectivedevicesincombinationstartersandinprotectedstartersshallcomplywiththerequirementsofIEC60947-2andIEC60947-3,asthecasemaybe.Equipmentcoveredbythisstandardisasfollows.1ACandd.c.contactorsACandd.c.contactorsintendedforclosingandopeningelectriccircuitsand,ifcombinedwithsuitablerelays(see1.2),forprotectingthesecircuitsagainstoperatingoverloadswhichmayoccurtherein.NOTEContactorscombinedwithsuitablerelaysandwhichareintendedtoprovideshort-circuitprotectionshalladditionallysatisfytherelevantconditionsspecifiedforcircuit-breakers(IEC60947-2).Thisstandardappliesalsototheactuatorsofcontactorrelaysandtothecontactsdedicatedexclusivelytothecoilcircuitofacontactor.2ACmotor-startersACmotor-startersintendedtostartandacceleratemotorstonormalspeed,toensurecontinuousoperationofmotors,toswitchoffthesupplyfromthemotorandtoprovidemeansfortheprotectionofmotorsandassociatedcircuitsagainstoperatingoverloads.StarterstheoperationofwhichdependsonthermalelectricalrelaysformotorprotectioncomplyingwithIEC60255-8,ormotor-incorporatedthermalprotectivedevicesdealtwithinIEC60034-11donotnecessarilymeetalltherelevantrequirementsofthisstandard.Overloadrelaysforstarters,includingthosebasedonsolidstatetechnology,shallmeettherequirementsofthisstandard.2.1Direct-on-line(fullvoltage)a.c.startersDirect-on-linestartersintendedtostartandaccelerateamotortonormalspeed,toprovidemeansfortheprotectionofthemotoranditsassociatedcircuitsagainstoperatingoverloads,andtoswitchoffthesupplyfromthemotor.Thisstandardappliesalsotoreversingstarters.2.2Reducedvoltagea.c.startersReducedvoltagea.c.startersintendedtostartandaccelerateamotortonormalspeedbyconnectingthelinevoltageacrossthemotorterminalsinmorethanonesteporbygraduallyincreasingthevoltageappliedtotheterminals,toprovidemeansfortheprotectionofthemotoranditsassociatedcircuitsagainstoperatingoverloads,andtoswitchoffthesupplyfromthemotor.Automaticchange-overdevicesmaybeusedtocontrolthesuccessiveswitchingoperationsfromonesteptotheothers.Suchautomaticchange-overdevicesare,forexample,time-delaycontactorrelaysorspecifiedtimeall-or-nothingrelays,under-currentdevicesandautomaticaccelerationcontroldevices(see5.10).2.2.1Star-deltastartersStar-deltastartersintendedtostartathree-phasemotorinthestarconnection,toensurecontinuousoperationinthedeltaconnection,toprovidemeansfortheprotectionofthemotoranditsassociatedcircuitsagainstoperatingoverloads,andtoswitchoffthesupplyfromthemotor.Thestar-deltastartersdealtwithinthisstandardarenotintendedforreversing
【中国标准分类号】:K31
【国际标准分类号】:29_130_20
【页数】:108P.;A4
【正文语种】:英语


【英文标准名称】:Screwedbronzeplugcocksandglandcocks
【原文标准名称】:青铜螺纹旋塞和填料旋塞
【标准号】:JISB2191-1995
【标准状态】:作废
【国别】:日本
【发布日期】:
【实施或试行日期】:
【发布单位】:日本工业标准调查会(JISC)
【起草单位】:TechnicalCommitteeonMachineElements
【标准类型】:()
【标准水平】:()
【中文主题词】:旋塞阀;青铜;螺纹管接头
【英文主题词】:plugvalves;screwedfittings;bronzes
【摘要】:
【中国标准分类号】:J13
【国际标准分类号】:23_060_20
【页数】:13P;A4
【正文语种】:日语