lanch：
EN60335的定義如下:extra-lowvoltagevoltagesuppliedfromasourcewithintheappliancethatdoesnotexceed50Vbetweenconductorsandbetweenconductorsandearthwhentheapplianceissuppliedatratedvoltage.導體之間或導體與地之間電壓(RMS)不超過50V的電壓.safetyextra-lowvoltagevoltagenotexceeding42Vbetweenconductorsandbetweenconductorsandearth,thenoloadvoltagenotexceeding50VWhensafetyextra-lowvoltageisobtainedfromthesupplymains,itistobethroughasafetyisolatingtransformeroraconvertorwithseparatewindings,theinsulationofwhichcomplieswithdoubleinsulationorreinforcedinsulationrequirements.導體之間或導體與地之間電壓(RMS)不超過42V的電壓,空載電壓(RMS)不超過50V,且該電壓要通過安全隔離變壓器獲得的.也就是說高壓和安全特低電壓之間要滿足雙重絕緣或加強絕緣的要求.安全特低電壓也就是我們通常所說的"SELV".本篇文章來源于工業技術網原文鏈接:http://www.nowtech.cn/news/view.asp?id=1872