BS EN 50065-4-6-2004 频率范围为3kHz至148.5kHz的低压电气设备的信号传输.低压退耦滤波器.相位耦合器
时间:2024-05-14 07:17:43 来源: 标准资料网 作者：标准资料网 阅读：8924
【英文标准名称】:Signallingonlow-voltageelectricalinstallationsinthefrequencyrange3kHzto148,5kHz-Lowvoltagedecouplingfilters-Phasecoulper
【原文标准名称】:频率范围为3kHz至148.5kHz的低压电气设备的信号传输.低压退耦滤波器.相位耦合器
【标准号】:BSEN50065-4-6-2004
【标准状态】:现行
【国别】:英国
【发布日期】:2004-11-25
【实施或试行日期】:2004-11-25
【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】:电压;频率;退耦;传输性能;低压设备;电力设备;频带;过滤器;影响;配电网;电气工程;低电压;定义;数据传送;试验条件;信号传输;低压电源;相位耦合器;信号;规范(验收);阻抗;尺寸;试验;信息传递;极限(数学)
【英文主题词】:Bandoffrequencies;Datatransfer;Decouplers;Decoupling;Definition;Definitions;Dimensions;Distributionnetworks;Electricalengineering;Electricalinstallations;Filters;Frequencies;Impedance;Influences;Informationtransfer;Limits(mathematics);Lowvoltage;Lowvoltagemains;Low-voltageinstallations;Phasecouplers;Signaltransmission;Signals;Specification;Specification(approval);Testing;Testingconditions;Transmissionperformance;Voltage
【摘要】:ThisEuropeanStandardappliestophasecouplersinamainscommunicationsystemforphasetoneutralvoltagenotexceeding250Va.c.andanominalcurrentnotexceeding125A,intendedforhouseholdandsimilarfixedinstallationincludingresidential,commercialandlightindustrialbuildings.ThisEuropeanStandardappliestophasecouplersusedtocontrolthecouplingofcommunicationsignalsbetweenphasesorsectionsofamainscommunicationsystem.A"phasecoupler"maybeusedtoachievecouplingbetweenthephasesofamultiphaseinstallation,ortoprovidebridgingofsignalsaroundothersystemcomponents.Thestandarddefines-therequirementstoensureaminimumcouplingbetweenthesections,and-therequirementstoensurenochangeonthesafetyoftheelectricalinstallation.
【中国标准分类号】:M30
【国际标准分类号】:31_160;33_040_30
【页数】:12P;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodforCloudPointofPetroleumProducts(MiniaturizedOpticalMethod)
【原文标准名称】:石油产品浊点的标准试验方法(微型光学法)
【标准号】:ASTMD7397-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【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】:D02.07
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:automaticcouldpoint;cloudpoint;miniaturizedcloudpointapparatus;Peltier;petroleumproducts;thermoelectricwaxcrystals;Cloudpoint;MiniaturizedOpticalMethod;Petroleumproducts
【摘要】:Thecloudpointofpetroleumproductsandbiodieselfuelsisanindexofthelowesttemperatureoftheirutilityforcertainapplications.Waxcrystalsofsufficientquantitycanplugfiltersusedinsomefuelsystems.Petroleumblendingoperationsrequireaprecisemeasurementofthecloudpoint.Thistestmethodcandeterminethetemperatureofthetestspecimenatwhichwaxcrystalshaveformedsufficientlytobeobservedasacloudwitharesolutionof0.1x00B0;C.ThistestmethodprovidesresultsthatareequivalenttoTestMethodD5773/IP446.ThetemperatureresultsofthistestmethodhavebeenfoundtobewarmerthanthoseofTestMethodD2500/IP219byanaverageof0.49x00B0;C;however,nosamplespecificbiaswasobserved.SimilartoTestMethodD5773/IP446,thistestmethoddeterminescloudpointinashorterperiodoftimethanTestMethodD2500/IP219.Note18212;Incasesofsampleswithcloudpointsnearambienttemperatures,timesavingsmaynotberealized.Note28212;ThistestmethodeliminatesmostoftheoperatortimerequiredofTestMethodD2500/IP219.Note38212;Theonlyutilityrequiredbytheapparatusdescribedinthistestmethodiselectricitywithpowerconsumptionofapproximately20watts.Theelectricpowercancomefromanalternatingcurrentsource(wallreceptacle)ordirectcurrentsourcesuchasabatteryoracigarettelighterpluginavehicle.Note48212;TheapparatusdescribedbythistestmethodcanbemademuchsmallerandlighterthanthatofTestMethodsD5773/IP446andD2500/IP219,allowingfullportability.Note58212;Theapparatususedinthe2006interlaboratorystudyweighedapproximately1kgandoccupiedthespaceofasmalllunchbox.SeeSection13.1.1Thistestmethodcoversthedeterminationofthecloudpointofpetroleumproductsandbiodieselfuelsthataretransparentinlayers40mminthicknessbyanautomaticinstrument.1.2Thistestmethodcoverstherangeoftemperaturesfromx2013;60to+20x00B0;Cwithtemperatureresolutionof0.1x00B0;C;however,therangeoftemperaturesincludedinthe2006interlaboratorycooperativetestprogramonlycoveredthetemperaturerangeofx2013;35to+12x00B0;C.SeeSection13.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:E30
【国际标准分类号】:75_080
【页数】:6P.;A4
【正文语种】:英语
【英文标准名称】:Aerospaceseries-Pipecouplingintitaniumalloy-Bulkheadnut
【原文标准名称】:航空航天系列.钛合金管连接件.闷头螺母
【标准号】:BSEN3266-2001
【标准状态】:现行
【国别】:英国
【发布日期】:2001-11-09
【实施或试行日期】:2001-11-09
【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】:钛合金;尺寸;螺母;闷头联接器;管道配件;飞行器部件;紧固件;管连接件
【英文主题词】:
【摘要】:Thisstandardspecifiesthecharacteristicsofbulkheadnutsforpipecouplings,intitaniumalloy,foraerospaceapplications.
【中国标准分类号】:V20
【国际标准分类号】:49_030_30
【页数】:10P;A4
【正文语种】:英语