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1、IEC 61000-4-11Voltage Dips, Short interruptions and voltage variations immunity tests電壓瞬時跌落電壓瞬時跌落, ,短時中斷和電壓漸變的抗短時中斷和電壓漸變的抗擾性試驗擾性試驗Prepared byPrepared byRICHTECRICHTEC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遭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,變電設備發生缺点或負荷忽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
2、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(Voltage Dips): 電氣系統某一點的電壓忽然下降,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): 供電電壓消逝一段時間,普通不超過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 (Voltage variation): 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
3、*14060510703025508020250-300電壓瞬時跌落(Voltage Dip)230Vac161Vac代表電壓瞬時代表電壓瞬時跌落跌落 30% 30%持續持續1010個週期個週期代表再過代表再過0 0處跌變處跌變電壓漸變 (Voltage Variation)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電壓添加所需求之時間/s40% UT220%120%220%0% UT220%120%220%xxx電壓漸變 Voltage Variations2s電壓縮小所需求之時間1s電壓縮小持續時間電壓縮小持續時間2s電壓添加所需求之時間PQT 電源
4、品質測試 Voltage Variations 電壓漸變IEC 61000-4-11What is voltage variation? 什麼是電壓變動Gradual up- or down-change of supply voltage 供電電壓逐漸 上昇或是滑落 (比原供電電壓高或低)Duration can be long or short with regard to the period 電壓逐漸變動持續時間可長可短-相對於周期Sources of voltage variations 電壓變動的來源Rotating machines working as generators a
5、nd feeding back energy into the mains馬達因旋轉關係构成產生器並回授能量進入供電端VVoltage variations testing according to IEC 61000-4-11Reduction to 40% / 0% of UnomTiming:t1=2s20%t2=1s20%t3=2s20%Steps of voltage change during t1 & t3 shall be /= 10% of Unom0%Testing Setup 測試佈局Isolation Transformer隔離變壓器Modula 6000EUTAC f
6、or ModulaAC for EUTStep /Variable Transformer昇/降壓變壓器As short as possible 越短越好Ground reference planeEUT inputEUT OutPQT Voltage dips and interruptions電壓瞬時跌落 與 短時中斷IEC 61000-4-11Sources of voltage dips and interruptions電壓瞬時跌落 與 短時中斷原因Sudden large change of load 負载忽然大的改變Short-circuits 短路VVoltage dips a
7、ccording to IEC 61000-4-11 Dips: Sudden reduction of voltage followed by voltage recovery after a short period of time 電壓忽然瞬降經過一段時間後恢復正常電壓忽然瞬降經過一段時間後恢復正常.Short interruptions according to IEC 61000-4-11 電壓短時中斷Short Interruptions: The disappearance of the supply voltage for a period of time typically
8、not exceeding 1 min.電源短時中斷線壓電源短時中斷線壓(消逝時間消逝時間)不得超出不得超出1分鐘分鐘Immunity testing principle for voltage dips & interruptions 電壓瞬降 及 短時中斷 抗擾性測試原理 Test systemVEUTMainsIEC 61000-4-11 applicationApplied to equipment with rated input current 16A per phaseDoes not apply to 400Hz AC and DC lines.PQT termsAngle 發
9、生角度T-event 事件持續時間 T-Rep事件重覆之時間F-SyncSynchronous or Asynchronous (depends on manufacturer) 頻率同步或非同步UinNominal voltage 正常輸入電壓UvarVariable voltage 變動之電壓Duration3 counts PQT Testing levels in the latest published standardIEC 61000-4-11Voltage Dips (For 50 Hz mains)Class Test level and durations for volt
10、age dips Class 1Case-by-case according to the equipment requirementsClass 20% during cycle0% during 1 cycle70% during 25 cyclesClass 30% during cycle0% during 1 cycle40% during 10 cycles70% during 25 cycles80% during 25 0 cyclesClass X (To be defined by product committee )XXXXXShort InterruptionsCla
11、ssTest level and durations for short interruptions Class 1Case-by-case according to the equipment requirementsClass 20% during 250 cyclesClass 30% during 250 cyclesClass XXVoltage Variations (Optional) (For 50 Hz mains)Voltage test levelTime for decreasing voltageTime at reduced voltageTime for increasing voltage 70%Abrupt1 cycle25 cyclesXXXX
