IEC61000-4-11

IEC61000-4-11VoltageDips,Shortinterruptionsandvoltagevariationsimmunitytests電壓瞬時跌落,短時中斷和電壓漸變的抗擾性試驗PreparedbyRICHTEC測試目的及應用場合•與低電壓電網連接之電氣電子設備會受到電網中電壓瞬時跌落,短時中斷和電壓漸變之影響,他們是由於供電電網,變電設備發生故障或負荷突然發生大的變動或是負荷連續變化所影起的,此IEC61000-4-11標準規定了電氣電子設備對此三種電網電壓變化的抗干擾試驗方法提供可供選擇之試驗等級應用場合•該標準適用於額定輸入電流每相不超過16A之電氣電子設備,-不適用:由直流及400Hz網絡供電之設備術語•電壓瞬時跌落(VoltageDips):電氣系統某一點的電壓突然下降,經過半個週期到幾秒鐘之短暫持續期後又恢復正常˙短時中斷(Interruption):供電電壓消失一段時間,一般不超過1分鐘,短時中斷可以認為是100%幅值電壓瞬時跌落˙電壓漸變(Voltagevariation):供電電壓逐漸變高或低於額定電壓,變化之持續時間相對於周期來說,可長可短試驗等級試驗等級(%UT)電壓瞬時跌落和短時中斷(%)持續時間(週期)01000.5*14060510703025508020250-300電壓瞬時跌落(VoltageDip)230Vac161Vac代表電壓瞬時跌落30%持續10個週期代表再過0處跌變電壓漸變(VoltageVariation)短期供電電壓漸變之時間設定電壓試驗等級電壓縮小所需之時間/s縮小電壓的持續時間/s電壓增加所需要之時間/s40%UT2±20%1±20%2±20%0%UT2±20%1±20%2±20%xxx電壓漸變VoltageVariations2s電壓縮小所需要之時間1s電壓縮小持續時間2s電壓增加所需要之時間PQT電源品質測試VoltageVariations電壓漸變IEC61000-4-11Whatisvoltagevariation?什麼是電壓變動–Gradualup-ordown-changeofsupplyvoltage供電電壓逐漸上昇或是滑落(比原供電電壓高或低)–Durationcanbelongorshortwithregardtotheperiod電壓逐漸變動持續時間可長可短-相對於周期Sourcesofvoltagevariations電壓變動的來源–Rotatingmachinesworkingasgeneratorsandfeedingbackenergyintothemains–馬達因旋轉關係形成產生器並回授能量進入供電端~VVoltagevariationstestingaccordingtoIEC61000-4-11•Reductionto40%/0%ofUnom•Timing:t1=2s±20%t2=1s±20%t3=2s±20%•Stepsofvoltagechangeduringt1&t3shallbe/=10%ofUnomUt100%40%t1t2t30%TestingSetup測試佈局IsolationTransformer隔離變壓器Modula6000EUTACforModulaACforEUTStep/VariableTransformer昇/降壓變壓器Asshortaspossible越短越好GroundreferenceplaneEUTinputEUTOutPQTVoltagedipsandinterruptions電壓瞬時跌落與短時中斷IEC61000-4-11Sourcesofvoltagedipsandinterruptions電壓瞬時跌落與短時中斷起因–Suddenlargechangeofload負载突然大的改變–Short-circuits短路~VVoltagedipsaccordingtoIEC61000-4-11-100%-80%-60%-40%-20%0%20%40%60%80%100%Dips:Suddenreductionofvoltagefollowedbyvoltagerecoveryafterashortperiodoftime電壓突然瞬降經過一段時間後恢復正常.ShortinterruptionsaccordingtoIEC61000-4-11電壓短時中斷-100%-80%-60%-40%-20%0%20%40%60%80%100%ShortInterruptions:Thedisappearanceofthesupplyvoltageforaperiodoftimetypicallynotexceeding1min.電源短時中斷線壓(消失時間)不得超出1分鐘Immunitytestingprincipleforvoltagedips&interruptions電壓瞬降及短時中斷抗擾性測試原理TestsystemVEUTMainsIEC61000-4-11application•Appliedtoequipmentwithratedinputcurrent16Aperphase•Doesnotapplyto400HzACandDClines.PQTterms•Angle發生角度•T-event•事件持續時間•T-Rep•事件重覆之時間•F-SyncSynchronousorAsynchronous(dependsonmanufacturer)頻率同步或非同步•UinNominalvoltage正常輸入電壓•UvarVariablevoltage變動之電壓•Duration3countsPQTTestinglevelsinthelatestpublishedstandardIEC61000-4-11VoltageDips(For50Hzmains)ClassTestlevelanddurationsforvoltagedipsClass1Case-by-caseaccordingtotheequipmentrequirementsClass20%during½cycle0%during1cycle70%during25cyclesClass30%during½cycle0%during1cycle40%during10cycles70%during25cycles80%during250cyclesClassX(Tobedefinedbyproductcommittee)XXXXXShortInterruptionsClassTestlevelanddurationsforshortinterruptionsClass1Case-by-caseaccordingtotheequipmentrequirementsClass20%during250cyclesClass30%during250cyclesClassXXVoltageVariations(Optional)(For50Hzmains)VoltagetestlevelTimefordecreasingvoltageTimeatreducedvoltageTimeforincreasingvoltage70%Abrupt1cycle25cyclesXXXX