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tjy168
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樓主  發(fā)表于: 2009-10-22 11:17
一設備，電源三相380V三相五線(xiàn)制，工作負載由變壓器升壓到AC2000V經(jīng)電容，二極管倍壓至DC4000--5000V  ，幾百毫安，設備接地良好，由三菱FX2N控制工作，屏電源24V經(jīng)隔離變壓器供電，接近開(kāi)關(guān)（二線(xiàn)制）由PLC自供電，電磁閥由隔離變壓器隔離后變壓DC24V供電，不定時(shí)燒屏，與此同一樣的設備卻無(wú)此故障，可能說(shuō)得不是很清楚，電氣圖就不上傳了，請大家想一下，

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