【英文标准名称】:Electromagneticcompatibility(EMC)-Part3-12:limits-Limitsforharmoniccurrentsproducedbyequipmentconnectedtopubliclow-voltagesystemswithinputcurrent>16Aandinferiororequal75Aperphase.
【原文标准名称】:电磁兼容性(EMC).第3-12部分:限值.与输入电流每相大于16A和小于或等于75A的公用低压系统连接的设备产生的谐波电流的限值
【标准号】:NFC91-003-12-2005
【标准状态】:现行
【国别】:法国
【发布日期】:2005-08-01
【实施或试行日期】:2005-08-05
【发布单位】:法国标准化协会(FR-AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:试验;电网;电压;电磁的;谐波电流;兼容性;伏特;输入电流;扰动;电网干扰;低压电器;定义;电压测量;试验条件;电压波动;电流测量;性能;低压电源;低电压;电气设备;电功率测量;电源电压;闪烁计;电磁兼容性;电力系统;极限(数学);数学计算;测量;电流;电气工程;电子设备;规范(验收);电气器具;输入电压;电子的;家用电器
【英文主题词】:Compatibility;Currentmeasurement;Currents;Definition;Definitions;Disturbances;Electricappliances;Electricpowernetworks;Electricpowersystems;Electricalengineering;Electricalequipment;Electricalhouseholdappliances;Electromagnetic;Electromagneticcompatibility;Electronic;Electronicequipment;EMC;Flickermeter;Harmoniccurrent;Inputcurrents;Inputvoltage;Limits(mathematics);Lowvoltage;Lowvoltagemains;Low-voltageequipment;Mathematicalcalculations;Measurement;Networkdisturbances;Performance;Powermeasurement(electric);Specification(approval);Supplyvoltages;Testing;Testingconditions;Volt;Voltage;Voltagefluctuations;Voltagemeasuring
【摘要】:
【中国标准分类号】:L06
【国际标准分类号】:33_100_01
【页数】:30P.;A4
【正文语种】:其他


【英文标准名称】:StandardTestMethodforTransverseRuptureStrengthofCementedCarbides
【原文标准名称】:烧结碳化物横向断裂强度的标准试验方法
【标准号】:ASTMB406-1996(2010)
【标准状态】:现行
【国别】:
【发布日期】:1996
【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】:B09.06
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:硬质合金;断裂强度;硬性金属;抗拉应力;横向断裂强度;弯曲试验;强度
【英文主题词】:cementedcarbides;fracturestrength;hardmetals;tensilestress;transverserupturestrength;Flexuraltesting;Strength
【摘要】:Thistestmethodisusedasameansofdeterminingthequalityofcementedcarbidegradepowdersbymeasuringtheirsinteredstrength.Itisperformedontestspecimenspreparedtospecifiedshape,dimensions,andsurfacefinish;testspecimensmaybepreparedfromfinishedpartsifsizepermits.Thereisnoknownstandardmaterialforthistestmethod.Thetransverserupturestrengthofcementedcarbidesisnotadesignvalue.Mostcommercialcementedcarbideshavemechanicalbehaviorthatisbestclassifiedasbrittle(negligibleductility).Fracturestrengthsaredependentoninternalorsurfaceflaws.Examplesofincoherentinternalflawsaremacropores,TypeBporosity(seeTestMethodB276),andinclusionsofforeignparticles.Suchflawsarerandomlydistributedspatiallyandinsizewithinthesinteredmaterial.Thisimpartsastatisticalnaturetoanytransverserupturestrengthmeasurement.Thestressdistributioninabeaminthree-pointloadingisnon-uniform.Itincreaseslinearlyalongthespantoamaximumatthecenter,andvarieslinearlythroughanysectionfromcompressiononthetoptotensiononthebottom.Themaximumtensilestressthereforeoccursatcenterspaninthebottommostfibersofthesample,andisdefinedasthetransverserupturestrengthatfailure.Failureisinitiatedatarandomflawsite,whichismostprobablynotcoincidentwiththemaximumstress.Thisimpartsanadditionalstatisticalnaturetotransverserupturestrengthmeasurements.1.1Thistestmethodcoversthedeterminationofthetransverserupturestrengthofcementedcarbides.1.2Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.TheSIvaluesinparenthesesareprovidedforinformationonly.1.3Thisstandarddoesnotpurporttoaddressthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H22
【国际标准分类号】:77_160
【页数】:3P.;A4
【正文语种】: