EN 302842-1-.2.3 VHF空对地和空对空数字链接(VDL)4模无线电设备.航空移动(空运)设备的技术特性和测量方法.第1部分:物理层(英文版本EN302842-1V1.2.3(2011-的核准本)

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【英文标准名称】:Fluidsforelectrotechnicalapplications-Unusedmineralinsulatingoilsfortransformersandswitchgear
【原文标准名称】:电工用液体.变压器和开关设备用的未使用过的矿物绝缘油
【标准号】:IEC60296-2003
【标准状态】:作废
【国别】:国际
【发布日期】:2003-11
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/TC10
【标准类型】:()
【标准水平】:()
【中文主题词】:分类系统;电气工程;介质;密度;粘度;击穿电压;热耗散;规范;硫;矿物油;燃料;测量;变压器;绝缘油;电绝缘材料;定义;规范(验收);损耗因数;闪点;开关设备;试验;纯度;稳定性;未使用的;氧化;皂化值
【英文主题词】:Breakdownvoltage;Classification;Classificationsystems;Definitions;Deliveryconditions;Density;Dielectric;Dissipationfactor;Electricalengineering;Electricalinsulatingmaterials;Flashpoint;Fuels;Heatdissipation;Identification;Insulatingoils;Limits(mathematics);Measurement;Mineraloils;Oils;Oxidation;Pourpoint;Properties;Purity;Samplingmethods;Saponificationnumber;Specification(approval);Specifications;Stability;Sulphur;Switchgear;Testing;Transformeroil;Transformers;Unused;Viscosity
【摘要】:Coversspecificationsandtestmethodsforunusedmineralinsulatingoils.Itappliestooildeliveredtotheagreedpointandtimeofdelivery,intendedforuseintransformers,switchgearandsimilarelectricalequipmentinwhichoilisrequiredasan
【中国标准分类号】:E38
【国际标准分类号】:29_040_10
【页数】:40P.;A4
【正文语种】:英语


【英文标准名称】:StandardTestMethodforMeasuringHeat-TransferRateUsingaThermalCapacitance(Slug)Calorimeter
【原文标准名称】:用热容量(芯棒)热量计测量传热速率的标准试验方法
【标准号】:ASTME457-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:E21.08
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:calorimeter;heattransferrate;slugcalorimeter;thermalcapacitance;Calorimeter--aerospaceapplications;Heatingtests--aerospacematerials;Heattransfer;Slugcalorimeter;Thermalcapacitance
【摘要】:Thepurposeofthistestmethodistomeasuretherateofthermalenergyperunitareatransferredintoaknownpieceofmaterial(slug)forpurposesofcalibratingthethermalenvironmentintowhichtestspecimensareplacedforevaluation.Thecalorimeterandholdersizeandshapeshouldbeidenticaltothatofthetestspecimen.Inthismanner,themeasuredheattransferratetothecalorimetercanberelatedtothatexperiencedbythetestspecimen.Theslugcalorimeterisoneofmanycalorimeterconceptsusedtomeasureheattransferrate.Thistypeofcalorimeterissimpletofabricate,inexpensive,andreadilyinstalledsinceitisnotwater-cooled.Theprimarydisadvantagesareitsshortlifetimeandrelativelylongcool-downtimeafterexposuretothethermalenvironment.Inmeasuringtheheattransferratetothecalorimeter,accuratemeasurementoftherateofriseinback-facetemperatureisimperative.Intheevaluationofhigh-temperaturematerials,slugcalorimetersareusedtomeasuretheheattransferrateonvariouspartsoftheinstrumentedmodels,sinceheattransferrateisoneoftheimportantparametersinevaluatingtheperformanceofablativematerials.Regardlessofthesourceofthermalenergytothecalorimeter(radiative,convective,oracombinationthereof)themeasurementisaveragedoverthecalorimetersurface.Ifasignificantpercentageofthetotalthermalenergyisradiative,considerationshouldbegiventotheemissivityoftheslugsurface.Ifnon-uniformitiesexistintheinputenergy,theheattransferratecalorimeterwouldtendtoaveragethesevariations;therefore,thesizeofthesensingelement(thatis,theslug)shouldbelimitedtosmalldiametersinordertomeasurelocalheattransferratevalues.Wherelargeablativesamplesaretobetested,itisrecommendedthatanumberofcalorimetersbeincorporatedinthebodyofthetestspecimensuchthataheattransferratedistributionacrosstheheatedsurfacecanbedetermined.Inthismanner,morerepresentativeheattransferratevaluescanbedefinedforthetestspecimenandthusenablemoremeaningfulinterpretationofthetest.Theslugselectionmaybedeterminedusingthenomogramasaguide(seeAppendixX1).1.1Thistestmethoddescribesthemeasurementofheattransferrateusingathermalcapacitance-typecalorimeterwhichassumesone-dimensionalheatconductionintoacylindricalpieceofmaterial(slug)withknownphysicalproperties.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.Note18212;ForinformationseeTestMethodsE285,E422,E458,E459,andE511.
【中国标准分类号】:A54
【国际标准分类号】:17_200_10
【页数】:7P.;A4
【正文语种】:英语