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1、1IEC 61000-4-11Voltage Dips, Short interruptions and voltage variations immunity tests電壓瞬時(shí)跌落電壓瞬時(shí)跌落, ,短時(shí)中斷和電壓漸變的短時(shí)中斷和電壓漸變的抗擾性試驗(yàn)抗擾性試驗(yàn)Prepared byRICHTEC2測試目的及應(yīng)用場合與低電壓電網(wǎng)連接之電氣電子設(shè)備會(huì)受到電網(wǎng)中電壓瞬時(shí)跌落,短時(shí)中斷和電壓漸變之影響,他們是由於供電電網(wǎng),變電設(shè)備發(fā)生故障或負(fù)荷突然發(fā)生大的變動(dòng)或是負(fù)荷連續(xù)變化所影起的,此IEC61000-4-11標(biāo)準(zhǔn)規(guī)定了電氣電子設(shè)備對此三種電網(wǎng)電壓變化的抗干擾試驗(yàn)方法提供可供選擇之試驗(yàn)等級(jí)3應(yīng)用場

2、合 該標(biāo)準(zhǔn)適用於 額定輸入電流每相不超過 16A 之電氣電子設(shè)備,-不適用: 由直流及400Hz 網(wǎng)絡(luò)供電之設(shè)備4術(shù)語電壓瞬時(shí)跌落(Voltage Dips): 電氣系統(tǒng)某一點(diǎn)的電壓突然下降,經(jīng)過半個(gè)週期到幾秒鐘之短暫持續(xù)期後又恢復(fù)正常短時(shí)中斷(Interruption): 供電電壓消失一段時(shí)間,一般不超過1分鐘,短時(shí)中斷可以認(rèn)為是100%幅值電壓瞬時(shí)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(xù)時(shí)間相對於周期來說,可長可短5試驗(yàn)等級(jí)6電壓瞬時(shí)跌落(Voltage Dip)230Vac161Vac代表電壓瞬時(shí)代表電壓瞬時(shí)跌落跌落 30%30%

3、持續(xù)持續(xù)1010個(gè)週期個(gè)週期代表再過代表再過0 0處跌變處跌變7電壓漸變 (Voltage Variation)短期供電電壓漸變之時(shí)間設(shè)定8電壓漸變 Voltage Variations2s電壓縮小所需要之時(shí)間1s電壓縮小持續(xù)時(shí)電壓縮小持續(xù)時(shí)間間2s電壓增加所需要之時(shí)間9PQT 電源品質(zhì)測試 Voltage Variations 電壓漸變IEC 61000-4-1110What is voltage variation? 什麼是電壓變動(dòng)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 c

4、an be long or short with regard to the period 電壓逐漸變動(dòng)持續(xù)時(shí)間可長可短-相對於周期11Sources of voltage variations 電壓變動(dòng)的來源 Rotating machines working as generators and feeding back energy into the mains 馬達(dá)因旋轉(zhuǎn)關(guān)係形成產(chǎn)生器並回授能量進(jìn)入供電端V12Voltage variations testing according to IEC 61000-4-11Reduction to 40% / 0% of UnomTiming:

5、t1=2s20%t2=1s20%t3=2s20%Steps of voltage change during t1 & t3 shall be /= 10% of UnomUt100%40%t1t2t30%13Testing Setup 測試佈局Isolation Transformer隔離變壓器Modula 6000EUTAC for ModulaAC for EUTStep /Variable Transformer昇/降壓變壓器As short as possible 越短越好Ground reference planeEUT inputEUT Out14PQT Voltage

6、dips and interruptions電壓瞬時(shí)跌落 與 短時(shí)中斷IEC 61000-4-1115Sources of voltage dips and interruptions電壓瞬時(shí)跌落 與 短時(shí)中斷起因 Sudden large change of load 負(fù)載突然大的改變 Short-circuits 短路V16Voltage dips according to IEC 61000-4-11 Dips: Sudden reduction of voltage followed by voltage recovery after a short period of time 電壓

7、突然瞬降經(jīng)過一段時(shí)間後恢復(fù)正常電壓突然瞬降經(jīng)過一段時(shí)間後恢復(fù)正常. .17Short interruptions according to IEC 61000-4-11 電壓短時(shí)中斷Short Interruptions: The disappearance of the supply voltage for a period of time typically not exceeding 1 min.電源短時(shí)中斷線壓電源短時(shí)中斷線壓( (消失時(shí)間消失時(shí)間) )不得超出不得超出1 1分鐘分鐘18Immunity testing principle for voltage dips &

8、interruptions 電壓瞬降 及 短時(shí)中斷 抗擾性測試原理 Test systemVEUTMains19IEC 61000-4-11 application Applied to equipment with rated input current 16A per phase Does not apply to 400Hz AC and DC lines.20PQT termsAngle 發(fā)生角度T-event 事件持續(xù)時(shí)間 T-Rep事件重覆之時(shí)間F-SyncSynchronous or Asynchronous (depends on manufacturer) 頻率同步或非同步U

9、inNominal voltage 正常輸入電壓UvarVariable voltage 變動(dòng)之電壓Duration3 counts 21PQT Testing levels in the latest published standardIEC 61000-4-1122Voltage Dips (For 50 Hz mains)Class Test level and durations for voltage dips Class 1Case-by-case according to the equipment requirementsClass 20% during cycle0% du

10、ring 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 )XXXXX23Short InterruptionsClassTest level and durations for short interruptions Class 1Case-by-case according to the equipment requirementsClass 20% during 250 cyclesClass 30% during 250 cyclesClass XX24Voltage Va

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