DIN 87903-1966 船舶防火图.示意图

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标准名称：	一般用途轴流式压缩机
中标分类：	机械 >> 通用机械与设备 >> 压缩机、风机
替代情况：	被JB/T 4359-94代替
发布日期：
实施日期：	2001-10-01
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【英文标准名称】:Electromagneticcompatibility(EMC)-Part3-6:Limits-AssessmentofemissionlimitsfortheconnectionofdistortinginstallationstoMV,HVandEHVpowersystems
【原文标准名称】:电磁兼容性(EMC).第3-6部分:限值.变形装置对MV、HV和EHV动力系统的连接用排放限值的评估
【标准号】:IEC/TR61000-3-6-2008
【标准状态】:现行
【国别】:国际
【发布日期】:2008-02
【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/SC77A
【标准类型】:()
【标准水平】:()
【中文主题词】:评估;定义;畸变系数;畸变测量;电气工程;电磁兼容性;EMC;放射电流;发射;供能系统(建筑物);闪光;闪烁计;谐波电流;谐波;高压设备;高压系统;阻抗;影响量;极限(数学);低压电源;电力网供电;数学计算;测量;常电压网;中压设备;供电系统;规范(验收);启动电流;叠加;电话系统;测试;试验条件;电压波动
【英文主题词】:Assessment;Definitions;Distortionfactors;Distortionmeasurement;Electricalengineering;Electromagneticcompatibility;EMC;Emissioncurrent;Emitting;Energysupplysystems(buildings);Evaluations;Flicker;Flickermeter;Harmoniccurrent;Harmonics;High-tensionunits;High-voltagesystem;Impedance;Influencequantities;Limits(mathematics);Lowvoltagemains;Mainssupply;Mathematicalcalculations;Measurement;Mediumvoltagenets;Medium-voltageinstallations;Powersupplysystem;Specification(approval);Startingcurrent;Superpositions;Telephonesystems;Testing;Testingconditions;Voltagefluctuations
【摘要】:ThisTechnicalReport,whichisinformativeinitsnature,providesguidanceonprincipleswhichcanbeusedasthebasisfordeterminingtherequirementsfortheconnectionofdistortinginstallationstoMV,HVandEHVpublicpowersystems(LVinstallationsarecoveredinotherIECdocuments).Forthepurposesofthisreport,adistortinginstallationmeansaninstallation(whichmaybealoadoragenerator)thatproducesharmonicsand/orinterharmonics.Theprimaryobjectiveistoprovideguidancetosystemoperatorsorownersonengineeringpractices,whichwillfacilitatetheprovisionofadequateservicequalityforallconnectedcustomers.Inaddressinginstallations,thisdocumentisnotintendedtoreplaceequipmentstandardsforemissionlimits.Thereportaddressestheallocationofthecapacityofthesystemtoabsorbdisturbances.Itdoesnotaddresshowtomitigatedisturbances,nordoesitaddresshowthecapacityofthesystemcanbeincreased.Sincetheguidelinesoutlinedinthisreportarenecessarilybasedoncertainsimplifyingassumptions,thereisnoguaranteethatthisapproachwillalwaysprovidetheoptimumsolutionforallharmonicsituations.Therecommendedapproachshouldbeusedwithflexibilityandjudgmentasfarasengineeringisconcerned,whenapplyingthegivenassessmentproceduresinfullorinpart.Thesystemoperatororownerisresponsibleforspecifyingrequirementsfortheconnectionofdistortinginstallationstothesystem.Thedistortinginstallationistobeunderstoodasthecustomer’scompleteinstallation(i.e.includingdistortingandnon-distortingparts).Problemsrelatedtoharmonicsfallintotwobasiccategories.?Harmoniccurrentsthatareinjectedintothesupplysystembyconvertersandharmonicsources,givingrisetoharmonicvoltagesinthesystem.Bothharmoniccurrentsandresultingvoltagescanbeconsideredasconductedphenomena.?Harmoniccurrentsthatinduceinterferenceintocommunicationsystems.Thisphenomenonismorepronouncedathigherorderharmonicfrequenciesbecauseofincreasedcouplingbetweenthecircuitsandbecauseofthehighersensitivityofthecommunicationcircuitsintheaudiblerange.Thisreportgivesguidancefortheco-ordinationoftheharmonicvoltagesbetweendifferentvoltagelevelsinordertomeetthecompatibilitylevelsatthepointofutilisation.Therecommendationsinthisreportdonotaddressharmonicinterferencephenomenaincommunicationcircuits(i.e.onlythefirstoftheabovecategoriesisaddressed).ThesedisturbancesneedtobeaddressedintermsofinternationaldirectivesconcerningtheProtectionofTelecommunicationLinesagainstHarmfulEffectsfromElectricPowerandElectrifiedRailwayLines,InternationalTelecommunicationUnion,ITU-TDirectives[1]2orintermsoflocallyapplicablestandardssuchas[2],[3]or[4].NOTETheboundariesbetweenthevariousvoltagelevelsmaybedifferentfordifferentcountries(seeIEV601-01-28[32]).Thisreportusesthefollowingtermsforsystemvoltages:–lowvoltage(LV)referstoUn≤1kV;–mediumvoltage(MV)refersto1kV【中国标准分类号】:L06
【国际标准分类号】:33_100_01
【页数】:58P;A4
【正文语种】:英语