【英文标准名称】:Testingthefrostresistanceofroofingtiles;freeze-thawtestwithfreezingonallsidesafterimpregnationwithwaterundervacuum
【原文标准名称】:屋顶瓦防冻性能试验.真空浸后中各个面的冷冻
【标准号】:DIN52253T.2-1988
【标准状态】:作废
【国别】:
【发布日期】:
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:
【国际标准分类号】:
【页数】:
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【英文标准名称】:Electromagneticcompatibility(EMC)-Part3:Limits-Section6:AssessmentofemissionlimitsfordistortingloadsinMVandHVpowersystems-BasicEMCpublication
【原文标准名称】:电磁兼容性(EMC)第3部分:限值第6节:中高压电力系统中畸变负荷发射限值的评估基础EMC出版物
【标准号】:IEC/TR361000-3-6-1996
【标准状态】:作废
【国别】:国际
【发布日期】:1996-10
【实施或试行日期】:
【发布单位】:国际电工委员会(IEC)
【起草单位】:IEC/SC77A
【标准类型】:()
【标准水平】:()
【中文主题词】:电气工程;供能系统(建筑物);电话系统;评定;评定;叠加;测量;辐射流;常电压网;数学计算;极限(数学);电磁兼容性;闪烁计;供电系统;低压电源;形变测量;电压波动;影响量;电力网供电;闪光;发射;形变系数;阻抗;高压设备;高压系统;谐波;启动电流;谐波电流;中压设备;试验条件;试验;规范(验收)
【英文主题词】:Assessment;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】:Thistechnicalreportoutlinesprincipleswhichareintendedtobeusedasthebasisfordeterminingtherequirementsforconnectinglargedistortingloads(producingharmonicsand/orinterharmonics)topublicpowersystems.Theprimaryobjectiveistoprovideguidanceforengineeringpracticeswhichwillensureadequateservicequalityforallconnectedconsumers.Sincetheguidelinesoutlinedinthisreportarenecessarilybasedoncertainsimplifyingassumptions,thereisnoguaranteethatthisapproachwillalwaysprovidetheoptimumsolutionforallharmonicproblems.Therecommendedapproachshouldbeusedwithflexibilityandjudgmentasfarasengineeringisconcerned,whenapplyingthegivenassessmentproceduresinfullorinpart.Thefinaldecisionregardingtheconnectionofdistortinginstallationswillalwaysrestwiththeutility.Problemsrelatedtoharmonicsfallintotwobasiccategories:-Theharmoniccurrentsareinjectedintothesupplynetworkbyconvertersandotherharmonicsources.Bothharmoniccurrentsandresultingvoltagescanbeconsideredasconductedphenomena.Theobjectiveofthisreportistolimitactualharmonicvoltagesonsupplysystemstolevels(compatibilitylevels)thatwillnotresultinadverseeffectsonsensitiveequipment.Sincetheharmonicvoltagesresultfromharmoniccurrentsandimpedances,thisinvolveslimitingtheharmoniccurrentsinjectedintothesystem.-Theharmoniccurrentsintherange50Hzto5kHzmayinduceinterferenceintocommunicationsystems.Thisphenomenonismorepronouncedathigherorderharmonicfrequenciesbecauseofincreasedcouplingbetweenthecircuitsandbecauseofthehighersensitivityofthecommunicationcircuitsintheaudiblerange.Thisreportprimarilyfocusesoncontrollingorlimitingharmonicvoltagesandtheireffects,butaclauseisincludedtoaddresscommunicationinterference.NOTES1Theloadistobeunderstoodasthecompleteconsumer'sinstallation.2Thisreportusesthefollowingtermsforsystemvoltage:-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】:113P.;A4
【正文语种】:英语