電壓瞬時跌落,短時中斷和電壓漸變的抗擾性試驗

1、1IEC 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短時中斷和電壓漸變的抗擾性試驗抗擾性試驗Prepared byRICHTEC2測試目的及應用場合與低電壓電網(wǎng)連接之電氣電子設備會受到電網(wǎng)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(wǎng),變電設備發(fā)生故障或負荷突然發(fā)生大的變動或是負荷連續(xù)變化所影起的,此IEC61000-4-11標準規(guī)定了電氣電子設備對此三種電網(wǎng)電壓變化的抗干擾試驗方法提供可供選擇之試驗等級3應用場

2、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(wǎng)絡供電之設備4術語電壓瞬時跌落(Voltage Dips): 電氣系統(tǒng)某一點的電壓突然下降,經(jīng)過半個週期到幾秒鐘之短暫持續(xù)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 (Voltage variation): 供電電壓逐漸變高或低於額定電壓,變化之持續(xù)時間相對於周期來說,可長可短5試驗等級6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%

3、持續(xù)持續(xù)1010個週期個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間設定8電壓漸變 Voltage Variations2s電壓縮小所需要之時間1s電壓縮小持續(xù)時電壓縮小持續(xù)時間間2s電壓增加所需要之時間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 電壓逐漸變動持續(xù)時間可長可短-相對於周期11Sources of voltage variations 電壓變動的來源 Rotating machines working as generators and feeding back energy into the mains 馬達因旋轉關係形成產(chǎn)生器並回授能量進入供電端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電壓瞬時跌落 與 短時中斷IEC 61000-4-1115Sources of voltage dips and interruptions電壓瞬時跌落 與 短時中斷起因 Sudden large change of load 負載突然大的改變 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)過一段時間後恢復正常電壓突然瞬降經(jīng)過一段時間後恢復正常. .17Short 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 not exceeding 1 min.電源短時中斷線壓電源短時中斷線壓( (消失時間消失時間) )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U

9、inNominal voltage 正常輸入電壓UvarVariable voltage 變動之電壓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