BS EN 61937-4-2003 数字音频.适用IEC60958的非线性PCM编码音频位流用接口(IEC60958:符合MPEG音频格式的非线性PCM位流)

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【英文标准名称】:Measurementproceduresofmagneticfieldlevelsgeneratedbyelectronicandelectricalapparatusintherailwayenvironmentwithrespecttohumanexposure
【原文标准名称】:关于人体辐射的铁路环境中电子和电气装置产生的磁场等级测量程序
【标准号】:BSEN50500-2008
【标准状态】:现行
【国别】:英国
【发布日期】:2008-08-29
【实施或试行日期】:2008-08-29
【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】:控制图;定义;影响;电气工程;电磁兼容性;EMC;排放;排放测量;辐射的排放;曝光;场强(电);人体;磁场发电机;磁场测量;磁场;测量;测量技术;计算方法;职业安全;辐射暴露;辐射测量;铁路设施;铁路区域;铁路人员;铁路;模拟;试验报告;牵引电网;交通车辆
【英文主题词】:Controlcharts;Definition;Definitions;Effect;Electricalengineering;Electromagneticcompatibility;EMC;Emission;Emissionmeasurement;Emissionofradiation;Exposure;Fieldstrength(electric);Humanbody;Magneticfieldgenerators;Magneticfieldmeasurement;Magneticfields;Measurement;Measuringtechniques;Methodsofcalculation;Occupationalsafety;Radiationexposure;Radiationmeasurement;Railwayapplications;Railwayterritory;Railwayworkers;Railways;Simulation;Testreport;Tractionnetwork;Trafficvehicles
【摘要】:Thescopeofthisproduct-familystandardislimitedtoapparatus,systemsandfixedinstallationswhichareintendedforuseintherailwayenvironment.Thefrequencyrangecoveredis0Hzto300GHz.Technicalconsiderationsandmeasurementsarenecessaryforfrequenciesupto20kHzbecausenorelevantfieldstrengthsareexpectedaboveduetothephysicalnatureofEMF-sourcesintherailwayenvironment.Theobjectofthisstandardistoprovidemeasurementandcalculationproceduresofelectricandmagneticfieldlevelsgeneratedbyelectronicandelectricalapparatusintherailwayenvironmentwithrespecttohumanexposure.Theregulationsregardingtheprotectionofhumanbeingduringexposuretonon-ionizingelectromagneticfieldsintherailwayenvironmentaredifferentwithinthecountriesofEuropeanCommunity.Thisstandardoffersaprocedureregardingmeasurement,simulationandevaluation.AtpresenttwoEuropeandocumentsregardingEMFhavetobeconsidered:a)CouncilRecommendation1999/519/ECof12July1999(seeBibliography);b)Directive2004/40/EC(seeBibliography).Themeasurementproceduresandpointsofmeasurementcoveralsotheaspectofpersonsbearingactiveimplantablemedicaldevices.NOTE1Notcoveredistheriskassessmentforpersonsbearingactiveimplantsinmagneticfieldgeneratedbyelectronicandelectricalapparatusintherailwayenvironment.Notcoveredarepersonalelectronicdevices(e.g.mobilephones,notebooks,wirelesscommunicationsystemsetc.)ofpassengersandworkers.Notcoveredareintentionaltransmitterswithfrequencieshigherthan20kHz.NOTE2Theseapparatus(withaworkingfrequencyof9kHzorhigher)arecoveredbyR&TTEDirectiveandhavetocomplyalsowithLVD(LowVoltageDirective).InthisviewtheseapparatushavealsolimitationofEMfieldsora“safety-distance”fortheseapparatusmustbegiven.
【中国标准分类号】:A58
【国际标准分类号】:17_240
【页数】:22P.;A4
【正文语种】:英语


Product Code:SAE ARP1702
Title:Defining and Measuring Factors Affecting Helicopter Turbine Engine Power Available
Issuing Committee:S-12 Helicopter Powerplant Committee
Scope: The purpose of this Aerospace Recommended Practice (ARP) is to define a method of measuring those factors affecting installed power available for helicopter power plants. These factors are installation losses, accessory power extraction, and operational effects. Accurate determination of these factors is vital in the calculation of helicopter performance as described in the flight manual. It is intended that the methods herein prescribe and define each factor as well as an approach to measuring said factor. Only standard installations of turboshaft engines in helicopters are considered. Special arrangements leading to high installation losses, such as the fitting of an infrared suppressor may require individual techniques for the determiantion and definition of engine installation losses.