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yzl333
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樓主  發(fā)表于: 2019-11-06 13:26
數控機床的進(jìn)線(xiàn)是三相4線(xiàn),零線(xiàn)和地線(xiàn)連接到一起的,機床內部是按三相5線(xiàn)的,零線(xiàn) 地線(xiàn)分開(kāi)的。結果就把零線(xiàn)地線(xiàn)接一起開(kāi)機。試機開(kāi)始正常,其中一臺做2小時(shí)左右,突然黑屏,系統保險,驅動(dòng)器保險 全爆了。拆下來(lái)?yè)Q保險后正常,裝上機就爆保險,24V正常。這個(gè)和接地有關(guān)系沒(méi)。求各位大師指點(diǎn)!
wangfuwang
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1樓  發(fā)表于: 2019-11-27 15:25
設備地線(xiàn)與零線(xiàn)分開(kāi)接 是接地保護 ,設備地線(xiàn)與零線(xiàn)接一起是接零保護  接零保護只有相線(xiàn)漏電情況下  才會(huì )有跳進(jìn)線(xiàn)開(kāi)關(guān)或燒進(jìn)線(xiàn)熔斷器 ,燒24V保險應該是控制線(xiàn)有問(wèn)題 或者24V設備有問(wèn)題

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