DIN EN 61129-1995 交流电接地开关.感应电流开关

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【英文标准名称】:Alternatingcurrentearthingswitches-Inducedcurrentswitching(IEC61129:1992);GermanversionEN61129:1994
【原文标准名称】:交流电接地开关.感应电流开关
【标准号】:DINEN61129-1995
【标准状态】:作废
【国别】:德国
【发布日期】:1995-02
【实施或试行日期】:1995-02-01
【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】:交流开关和控制开关;断路器;定义;接地;交流电流;接地开关;交流开关;开关;高压电器;额定值;高电压;试验;电流
【英文主题词】:circuitbreakers;acswitchgearandcontrolgear;switches;definitions;earthingswitches;ratings;currents;earthing;alternatingcurrent;alternating-currentswitches;high-voltageequipment;testing;highvol
【摘要】:
【中国标准分类号】:K31
【国际标准分类号】:29_120_40
【页数】:14P;A4
【正文语种】:德语


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【英文标准名称】:StandardTestMethodforAirflowResistanceofAcousticalMaterials
【原文标准名称】:隔声材料气流阻力的标准试验方法
【标准号】:ASTMC522-2003
【标准状态】:现行
【国别】:
【发布日期】:2003
【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】:E33.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:1声学的;2气流阻力;3建筑物声学;4建筑;5材料;6电阻;7试验
【英文主题词】:absorption;acousticalmaterials;airflowresistance;airflowresistivity
【摘要】:Thespecificairflowresistanceofanacousticalmaterialisoneofthepropertiesthatdetermineitssound-absorptiveandsound-transmittingproperties.Measurementofspecificairflowresistanceisusefulduringproductdevelopment,forqualitycontrolduringmanufacture,andforspecificationpurposes.Validmeasurementsaremadeonlyintheregionoflaminarairflowwhere,asidefromrandommeasurementerrors,theairflowresistance(R=P/U)isconstant.Whentheairflowisturbulent,theapparentairflowresistanceincreaseswithanincreaseofvolumevelocityandthetermx201C;airflowresistancex201D;doesnotapply.ThespecificairflowresistancemeasuredbythistestmethodmaydifferfromthespecificresistancemeasuredbytheimpedancetubemethodinTestMethodC384fortworeasons.Inthepresenceofsound,theparticlevelocityinsideaporousmaterialisalternatingwhileinthistestmethod,thevelocityisconstantandinonedirectiononly.Also,theparticlevelocityinsideaporousmaterialisnotthesameasthelinearvelocitymeasuredoutsidethespecimen.1.1Thistestmethodcoversthemeasurementofairflowresistanceandtherelatedmeasurementsofspecificairflowresistanceandairflowresistivityofporousmaterialsthatcanbeusedfortheabsorptionandattenuationofsound.Materialscoverarangefromthickboardsorblanketstothinmats,fabrics,papers,andscreens.Whenthematerialisanisotropic,provisionismadeformeasurementsalongdifferentaxesofthespecimen.1.2Thistestmethodisdesignedforthemeasurementofvaluesofspecificairflowresistancerangingfrom100to10000mksrayls(Pas/m)withlinearairflowvelocitiesrangingfrom0.5to50mm/sandpressuredifferencesacrossthespecimenrangingfrom0.1to250Pa.Theupperlimitofthisrangeoflinearairflowvelocitiesisapointatwhichtheairflowthroughmostporousmaterialsisinpartialorcompletetransitionfromlaminartoturbulentflow.1.3AprocedureforaccreditingalaboratoryforthepurposesofthistestmethodisgiveninAnnexA1.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q25
【国际标准分类号】:91_120_20
【页数】:5P.;A4
【正文语种】: