BS 5142-1974 标准电池规范
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来源:标准资料网
【英文标准名称】:Specificationforstandardcells
【原文标准名称】:标准电池规范
【标准号】:BS5142-1974
【标准状态】:现行
【国别】:英国
【发布日期】:1974-07-19
【实施或试行日期】:1974-07-19
【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】:副基准;副标准;电压;电绝缘;作标记;电池
【英文主题词】:Calibration;Cells;Discharge;Electricalengineering;Electrodes;Electrolytes;Referencepoint;Saturation;Specification(approval);Standardcells;Unsaturated
【摘要】:Specifiesdefinitions,classification,operatingtemperaturerange,e.m.f.,permissibledeviationofthee.m.f.,testconditionsforcertification,electricalandmechanicalrequirements,transportandstoragerequirementsandmarkingsandsymbolsforsaturatedandunsaturatedstandardcells.Anappendixgivestestconditionsfordeterminingthetemperature-hysteresiseffect.
【中国标准分类号】:A68
【国际标准分类号】:17_220_01
【页数】:16P;A4
【正文语种】:英语
【英文标准名称】:Specificationforpowerandcurrenttransformersforuseinaircraftelectricalpowersupplysystems
【原文标准名称】:航空供电系统用电力变压器和电流互感器规范
【标准号】:BS2G127-1967
【标准状态】:现行
【国别】:英国
【发布日期】:1967-12-29
【实施或试行日期】:1967-12-29
【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】:航空运输工程;交流变压器;仪表用变压器;腐蚀试验;变压器;性能试验;作标记;振动试验;飞行器部件;防尘试验;电力变压器;质量保证;电力系统;中性盐雾试验;环境试验;电气试验;设计;电流互感器;定型试验;试验设备
【英文主题词】:transformers;dust-tightnesstests;performancetesting;corrosiontests;vibrationtesting;aircraftcomponents;currenttransformers;marking;airtransportengineering;electricaltesting;typetesting;alternating-currenttransformers;powertransformers;instrumenttransformers;design;qualityassurance;electricpowersystems;environmentaltesting;salt-spraytests;testequipment
【摘要】:ThisBritishStandardstatesthegeneraldesignandtestrequirementsforpowertransformersof25VAratingandlargerandforcurrenttransformersforuseinaircraftelectricalpowersupplysystems.Itisintendedtoapplytosingle-phase,three-phaseorScottconnectedtransformersusedindistribution,loadsharingandprotectivecircuitsetc.,butnottotransformersspecificallydesignedforuseinelectronicequipment.
【中国标准分类号】:V40
【国际标准分类号】:49_060
【页数】:12P.;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodforAirflowCalibrationofFanPressurizationDevices
【原文标准名称】:风扇增压装置气流校正的标准试验方法
【标准号】:ASTME1258-1988(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:1988
【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】:E06.41
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:air-leakagemeasurement;airflowcalibration;airflowmeasurement;buildingenvelopes;fandepressurizationdevices;Airpressuretesting--buildingconstructions/materials;Buildingenvelopes;Calibration--air/atmosphericanalysisinstruments;Chambernoz
【摘要】:Thefanpressurizationprocedureprovidesarelativelyfastevaluationoftheairtightnessofbuildingenvelopes.Inorderfortheaccuracyofthetestresultstobeknown,theairflowratemeasurementtechniqueofthefanpressurizationsystemmustbecalibrated.Thistestmethodisapplicabletofanpressurizationsystemsthatareinstalledinanopeninginthebuildingenvelope,asopposedtopressurizationtechniquesinvolvingthemechanicalventilationsystemofthebuilding.Thetechniqueofpressurizationtestingofbuildingsputsspecificrequirementsonthecalibrationoffanpressurizationsystems.Thecalibrationmustcovertherangeoffanpressuredifferences(approximately12.5to75Pa)thatisinducedduringpressurizationtests.Thecalibrationmustalsocoverarangeinfanairflowratescorrespondingtotherangeinbuildingsizeandairtightnessthatthefanpressurizationsystemwillencounterinthefield.Thefanpressurizationsystemmustbecalibratedinbothdirectionsofairflowusedtopressurizeanddepressurizeabuildingifthesystemairflowdirectionisreversible.Thesetwocalibrationscanbeconductedusingthevarioussetupsdescribedinthistestmethod;howeversomeofthesetupscanbecombinedsuchthatasinglecalibrationfacilitycanbeusedtocalibratethefaninbothdirections.Suchasinglesetupmayinvolvemovingthefanpressurizationsystemfromoneendofthechambertotheother,reversingtheorientationofthesystematthesameendofthechamber,oritmaynotrequiremovingthesystematall.Thecalibrationtechniqueisapplicabletothetwobasictypesoffanpressurizationsystemsinuse,r/mindoorsandsignaldoors.Forfanpressurizationsystemsthatoperateinmultiplerangesofairflowrate,thesystemmustbecalibratedineachrange.Thecalibrationtechniqueisintendedtoprovideacompletecalibrationofafanpressurizationsystem.Aftercalibratingseveralsystemsofanidenticalorsimilardesign,thefanairflowratemaybefoundtobeindependentofcertainparameterssuchasfanpressuredifference.Othersimplifyingrelationsbetweenfanairflowrateandfanspeedorfansignalmaybeobserved.Iftheserelationsareobserved,amanufacturerorothercalibratormaychoosetosimplifythecalibrationprocedurebyreducingthenumberofcalibrationpoints.Theuseoffanpressurizationsystemsinactualbuildingsintroducesadditionalfactorsthatmaycauseerrorsintheairflowratemeasurementthatarenotaccountedforbythecalibration.Thesefactorsincludeoperatorandweathereffectsandinterferencefrominternalpartitionsandotherobstructions.^1.1Thistestmethodcoverstheairflowmeasurementcalibrationtechniquesforfanpressurizationsystemsusedformeasuringairleakageratesthroughbuildingenvelopes.1.2ThistestmethodisapplicabletosystemsusedforairleakagemeasurementasdescribedinPracticeE779.1.3Thistestmethodinvolvestheinstallationofthefanpressurizationsysteminacalibrationchamber.Useofthefanpressurizationsysteminanactualbuildingmayintroduceadditionalerrorsintheairflowmeasurementduetooperatorinfluence,interferenceofinternalpartitionsandfurnishings,weathereffects,andotherfactors.1.4Theproperuseofthistestmethodrequiresaknowledgeoftheprinciplesofairflowandpressuremeasurement.1.5Thisstandardincludestwobasicprocedures,apreferredprocedure,basedonASHRAE51/AMCA210,andanoptionalprocedurebasedonanonstandardairflowmeasurementtechnique,commonlyusedbymanufacturersoffanpressurizationdevices,butwhichhasnotbeencomparedwithstandardairflowmeasurementtechniques.1.6Thisstandarddoesnotpu......
【中国标准分类号】:J72
【国际标准分类号】:23_120
【页数】:9P.;A4
【正文语种】:英语
