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【英文标准名称】:TestMethodforAlternating-CurrentMagneticPropertiesofMaterialsatPowerFrequenciesUsingWattmeter-Ammeter-VoltmeterMethodand25-CmEpsteinTestFrame
【原文标准名称】:电源频率下用瓦特计-安培计-伏特计法和25厘米艾普斯亭(EPSTEIN)机架测定材料交流电磁性能的方法
【标准号】:ANSI/ASTMA343-1997
【标准状态】:现行
【国别】:美国
【发布日期】:1997
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:频率;测量;磁学
【英文主题词】:magnetism;frequencies;measurement
【摘要】:Thistestmethodcoverstestsforthemagneticpropertiesofbasicflat-rolledmagneticmaterialsatpowerfrequencies(25to400Hz)usinga25-cmEpsteintestframeandthe25-cmdouble-lap-jointedcore.Itcoversthedeterminationofcoreloss,rmsexcitingpower,rmsandpeakexcitingcurrent,andseveraltypesofacpermeabilityandrelatedpropertiesofflat-rolledmagneticmaterialsunderacmagnetization.ThistestmethodshallbeusedinconjunctionwithPracticeA34.Thistestmethodprovidesatestforcorelossandexcitingcurrentatmoderateandhighinductionsupto15kG(1.5T)onnonorientedelectricalsteelsandupto18kG(1.8T)ongrain-orientedelectricalsteels.Thefrequencyrangeofthistestmethodisnormallythatofthecommercialpowerfrequencies50to60Hz.Withproperinstrumentationitisalsoacceptableformeasurementsatotherfrequenciesfrom25to400Hz.Thistestmethodalsoprovidesproceduresforcalculatingacimpedancepermeabilityfrommeasuredvaluesofrmsexcitingcurrentandforacpeakpermeabilityfrommeasuredpeakvaluesoftotalexcitingcurrentsatmagnetizingforcesuptoabout150Oe(12000A/m).Explanationofsymbolsandabbreviateddefinitionsappearinthetextofthistestmethod.TheofficialsymbolsanddefinitionsarelistedinTerminologyA340.Thevaluesstatedineithercustomary(cgs-emuandinch-pound)unitsorSIunitsaretoberegardedseparatelyasstandard.Withinthetext,theSIunitsareshowninbracketsexceptforthesectionsconcerningcalculationswherethereareseparatesectionsfortherespectiveunitsystems.Thevaluesstatedineachsystemarenotexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthesystemsmayresultinnonconformancewiththistestmethod.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:N21
【国际标准分类号】:17_220_20
【页数】:
【正文语种】:英语


【英文标准名称】:Fixedrailwayinstallations.Equipmentforoverheadelectrictelecommunicationandsignallinglines.Bracketforglassinsulators.
【原文标准名称】:铁路固定设备.通信和信号装置架空线路用器材.旋转托架
【标准号】:NFF56-351-1980
【标准状态】:现行
【国别】:法国
【发布日期】:1980-05-01
【实施或试行日期】:1980-05-01
【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】:信号装置;尺寸;架空线;铁路固定设备;铁路设备;电力传输线路;质量(物质);名称与符号;电气布线系统;尺寸公差;规范;撑架;传输线路;通信传输线路
【英文主题词】:
【摘要】:
【中国标准分类号】:S73;S61
【国际标准分类号】:45_080
【页数】:2P;A4
【正文语种】:其他