零线电流消除器（专业名称：零序滤波器）是本公司通过自主研发和引进国外先进技术相结合、开发出来的具有自主知识产权和国家专利的高新技术产品。是解决各行业电气设备在三相负载平衡时零线电流过大引起的设备故障和安全隐患的高科技产品。Zerocurrenteliminator(professionalname:zerosequencefilter)isresearchedanddevelopedbyourcompany,thisproductisnewhigh-techproductdevelopedbycombiningwithabroadadvancedtechnologyandreservesproprietaryintellectualpropertyrightsandnationalpatent.Whenthethree-phaseloadevenlybutcurrentofzerolineoverflow,byusingthisproductitcouldsolveequipmentfailureandavoidsafetyloopholeforelectricalindustry.
工具/原料
专门针对不同场合的零线电流过大消除
零序滤波器（零线电流消除器）
方法/步骤
1、应用场合1.ApplicableCondition目前已大量应用于：LED显示屏、广告牌、LED路灯、景观照明、电池化成检测系统、电源生产老化系统、商场、体育馆、舞台、大型商业综合体等场所行业。CurrentlyzerocurrenteliminatorcouldbeusedtoeliminateoverflowofcurrentofzerolineforLEDdisplayscreen,advertisingboard,LEDstreetlamp,landscapelighting,batteryformattinginspectionsystem,manufacturingandagingsystemofpower,emporium,stadium,stageandlarge-scalecomplexetc.
2、常见造成零线电流过大的电子设备1.ElectricalEquipmentsWhichOftenEncounterZeroCurrentOverFlowl各种开关电源设备（计算机、电视机、显示器等）；lVariousswitchingpowerequipment(computer,television,displayscreenetc)l变频器的大量应用（变频空调、电机节能等）；lEquipmentwithmassfrequencyconverter(inverterairconditioner,energysavingmotoretc.)l各种新光源（LED灯、节能灯、荧光灯等）；lVariousnewilluminants(LEDlamp,energysavinglamp,fluorescentlampetc.)l办公设备（复印机、传真机等）；lOfficeequipments(duplicatingmachine,faxmachineetc.)l家用电器（洗衣机、显示屏、微波炉等）；lHouseholdappliances(washingmachine,displayscreen,micro-ovenetc.)l电子设备（手机充电器等整流设备）lelectronicequipments(rectifyingappliancessuchasphonechargeretc)
方法/步骤2
1、零线电流产生的原因1.Thecauseofzerolinecurrentoccuring根据国家标准GB17625.1-2003《电磁兼容限值谐波电流发射限值（设备每相输入电流≤16A）》限值要求，对以上设备谐波限值很低，造就产品3次谐波含量很大，由于3次谐波矢量方向角度一致，使用寿命次谐波向零线叠加，造成零线电流过大，。单体功率极少，单体而言，造成的危害可以忽略不计，但当相当多的单体一起使用时，零线电流大得惊人（严重时超过相线电流的两倍）AccordingtolimitvaluestipulatedbynationalstandardGB17625.1-2003“Electromagneticcompatibility--Limits--Limitsforharmoniccurrentemissions(equipmentinputcurrent≤16Aperphase)”,theharmoniccurrentlimitvalueregulatedforaboveequipmentstatedunderitem3isverylow,itmakesthe3rdorderharmoniccurrentcapacitylarge,alsobecausethe3rdorderharmoniccurrentisconsistentinvector,directionandangle,theworkinglifeofsubharmoniccurrentoverlaytozeroline,thesemakesthecurrentofzerolineoverflow.Powercapacityofsingleequipmentislowandwecouldignoreitsdamage,butwhenagreatamountofequipmentsareusedatthesametime,currentofzerolinewillbegreat(itwillbemorethantwiceofthephaselineinserioussituation).
2、谐淡捋墨热波的危害1.HarmOfHarmonicCurrentl正常情况下，零线线径为相线的1/3或1/2，而实际电流情况是零线电流高于相线电流的情况越来越多，使婧泸谕明零线过载严重、发热严重，老化迅速，很容易由于短路造成火灾等一系列人身安全隐患；lNormallythewirediameterofzerolineis1/3or1/2ofthephaseline,infactitbecomescommonthatcurrentofzerolineishigherthanphaseline,thesemakesthezerolineoverload,seriousheatandrapidaging,undersuchcondition,fireandothersafetyloopholewillbeeasilycausedbyshortcircuit.l由于零线电流过大，使变压器零序保护动作经常跳闸。lBecausethecurrentofzerolineoverflowgreatly,consequentlythezero-sequenceprotectionoftransformerstartsandtripsfrequently.l增加用电量，零线电流过大，零线发热消耗能量，谐波也会消耗能量lTheelectricityconsumptionincrease.Becausethezerolineoverflowgreatly,thezerolineheatandconsumeenergyandaccordinglytheharmoniccurrentconsumeenergy.l补偿功率因数的电容器过热，易损坏，寿命短，造成功率因数降低；lThecapacitorusedtocompensatepowerfactorisoverheating,undersuchcondition,thecapacitoriseasytobedamagedandworkshortly,andconsequentlythepowerfactordecrease.l造成开关及误动作、失灵；设备精度下降、稳定性下降；Itwillleadtoswitchmalfunctionandoutofwork,consequentlytheaccuracyandstabilityofequipmentdecreases.
3、零线电流消除器询骆帘呦带来什么好处1.AdvantageOfZeroCurrentEliminatorl能腮瘠廴镧锐减零线电流90%以上，避免电缆电线过热，节能10%以上；lItcoulddecreasemorethan90%ofthecurrentinzeroline,andsavemorethan10%ofenergybyavoidingcableorwireoverheat.l避免零线电缆由于过电流导致的短路引起电气火灾；lItcouldavoidfirecausedbyshortcircuitwhilecurrentoverflowinzeroline.l避免中性线零位飘移，使中性线对地没电压，对设备及人身安全造成隐患；lItcouldavoidzeropositionofneutrallinedrifting.Ifthezeropositionofneutrallineslips,therewillbenovoltagebetweenneutrallineandground,andthesewillcausesafetyloopholetoequipmentandhumanbeing.l避免谐波对精密设备的干扰（如计算机死机），产生不必要的损失；lItcouldavoidharmoniccurrenttodisturbtheprecisionequipmentandstopcausingunnecessarycost(suchascomputersystemhalted)l避免由三次谐波对三相异步电动机产生紧箍作用，使烧坏电动机；·The3rdorderharmoniccurrentmaymakelockingeffecttotriphaseasynchronousmotorandburnthemotor.Itcouldavoidsuchdamage.l避免零序保护误动作，消除由于误动作造成的经济损失；lItcouldavoidmalfunctionofzero-sequenceprotection,andeliminatethecostcausedbymalfunction.
