關于UL認證鎮流器問題
我司有一個27W鎮流器做UL認證時,UL那邊測試燈管對地的觸摸電壓超標?請問高手UL認證要測這一項嗎?怎么解決?多謝!
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@guli1958
國內的要求是:預熱啟動時的燈管上的泄露電壓,不知道UL認證中是否屬于這個范疇內?如果是有四種方法可以解決.
24.3.1 For an electronic ballast, the ballast is to be connected as illustrated in Figure 24.1, and energized at an input voltage and frequency in accordance with 21.6. A piece of metal foil 2 inches (51 mm) wide is to be wrapped around the entire circumference of the lamp, and the foil is to be moved along the longitudinal axis of the lamp as illustrated in Figure 24.1. A lead from the foil is to be attached to the lamp reaction current network shown in Figure 24.3. The measured current shall not exceed 0.2 milliampere through the 200 ohm resistor if the frequency is 60 hertz. When using an rms indicating voltmeter, the voltage at the network output shall not exceed 40 millivolts (minus 28 dBV), regardless of the frequency.
Exception No. 1: For a quad-type compact lamp, the foil need not fit into the crevice between bulb tubes.
Exception No. 2: The test need not be conducted if the ballast is marked for use only with compact lamps rated less than 20 watts.
Exception No. 1: For a quad-type compact lamp, the foil need not fit into the crevice between bulb tubes.
Exception No. 2: The test need not be conducted if the ballast is marked for use only with compact lamps rated less than 20 watts.
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@選擇
24.3.1Foranelectronicballast,theballastistobeconnectedasillustratedinFigure24.1,andenergizedataninputvoltageandfrequencyinaccordancewith21.6.Apieceofmetalfoil2inches(51mm)wideistobewrappedaroundtheentirecircumferenceofthelamp,andthefoilistobemovedalongthelongitudinalaxisofthelampasillustratedinFigure24.1.AleadfromthefoilistobeattachedtothelampreactioncurrentnetworkshowninFigure24.3.Themeasuredcurrentshallnotexceed0.2milliamperethroughthe200ohmresistorifthefrequencyis60hertz.Whenusinganrmsindicatingvoltmeter,thevoltageatthenetworkoutputshallnotexceed40millivolts(minus28dBV),regardlessofthefrequency.ExceptionNo.1:Foraquad-typecompactlamp,thefoilneednotfitintothecrevicebetweenbulbtubes.ExceptionNo.2:Thetestneednotbeconductediftheballastismarkedforuseonlywithcompactlampsratedlessthan20watts.
以上是UL935測試這項的標準,怎么沒人知道解決方案?
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