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xingyu003
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樓主  發(fā)表于: 2019-09-19 14:37
37KW風(fēng)機采用星三角啟動(dòng),熱過(guò)載繼電器采用施耐得LRE359N 48-65A,接觸器采用施耐得2個(gè) LC1N65M5N 1個(gè)LC1N40M5N。轉換時(shí)間13S。電源電壓400V,這種控制方式做過(guò)不下幾十套,最近有一套轉換時(shí)經(jīng)常出現過(guò)載報警,開(kāi)始懷疑風(fēng)機有問(wèn)題,全部更換后情況仍然出現。接線(xiàn)也檢查過(guò)沒(méi)問(wèn)題,說(shuō)明一點(diǎn)工廠(chǎng)無(wú)地線(xiàn),自已在鋼結構柱里打了一根。不知會(huì )不會(huì )影響到。
生產(chǎn)技術(shù)李鋼
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1樓  發(fā)表于: 2020-03-07 12:05
將從啟動(dòng)到電流回落穩定這段時(shí)間作為星形連接運行時(shí)間,在這段時(shí)間結束后進(jìn)入角形連接運行。注意星接與角接時(shí)的電機旋轉方向必須一致。
生產(chǎn)技術(shù)李鋼
級別: 網(wǎng)絡(luò )英雄
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發(fā)帖數量: 412 個(gè)
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2樓  發(fā)表于: 2020-04-26 11:20
延長(cháng)星接時(shí)間,直到星接運轉穩定后再切換成角接,看看行不行。

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