关于UL认证镇流器问题
我司有一个27W镇流器做UL认证时,UL那边测试灯管对地的触摸电压超标?请问高手UL认证要测这一项吗?怎么解决?多谢!
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@guli1958
国内的要求是:预热启动时的灯管上的泄露电压,不知道UL认证中是否属于这个范畴内?如果是有四种方法可以解决.
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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@选择
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测试这项的标准,怎么没人知道解决方案?
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