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250557508
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樓主  發(fā)表于: 2009-10-15 19:38
    小弟公司是做人造石材的,有一臺壓制板材的機器,配置了8臺震動(dòng)電機,每臺4.5KW,用一臺75KW的變頻器拖動(dòng)。平時(shí)都很正常。
  昨天晚上,一次燒了兩個(gè)電機,并且導致公司電源總開(kāi)關(guān)(630A)跳閘,恢復供電以后,發(fā)現生產(chǎn)線(xiàn)大部分的指示燈(直接接在電源上沒(méi)經(jīng)過(guò)接觸器控制的,還有停電時(shí)正處于工作狀態(tài)的)燒壞~!而且有三個(gè)計量裝置(2稱(chēng)重顯示器,1溫控顯示器)燒壞~!
  當時(shí)小弟并不當班,而值班那位哥們是剛來(lái)的,上班才一個(gè)禮拜,基本不清楚當時(shí)的狀況。但是根據我們車(chē)間主任的描述,當時(shí)的電壓達到430V,我想問(wèn)問(wèn)是不是跟這個(gè)有關(guān)?給控制回路裝上隔離變壓器能夠解決問(wèn)題么?要是不行,那我應該咋辦?
  請哪位大俠指點(diǎn)一下迷津~~~感激不盡!
[ 此帖被250557508在2009-10-17 21:30重新編輯 ]
waxiao88
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1樓  發(fā)表于: 2009-10-17 21:41
朋友,據你所述,定是零線(xiàn)的問(wèn)題,并且你司的供電是三相四線(xiàn)式.零地共用的.當出現總零線(xiàn)處有問(wèn)題(接觸不良)就會(huì )出現三相電壓不穩.單相負荷處電壓最高可達相電壓所以220V的東西會(huì )燒.電機燒呢,也就是三相太不平衡了.

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