描述

MERLIN GERIN 32570

籠型電機修理時未裝兩端蓋之前，繞組對機殼絕緣良好。裝上后，絕緣電阻降低。這種現(xiàn)象可判斷故障發(fā)生在繞組的兩端部。造成絕緣電阻降低的原因，可能是漆包線上漆膜有局部碰破或繞線模偏大使繞組端部伸出較長。因端蓋罩上后，端蓋內(nèi)壁靠近或接觸故障點，所以使繞組絕緣電阻降低。要排除這種故障，首先應判斷故障在電機哪一端。

判斷方法是：先裝一頭端蓋，用500V絕緣電阻表測繞組的絕緣電阻，如很低，則說明這端繞組有故障存在。然后，拆下這頭端蓋，再裝上另一頭端蓋，測量繞組的絕緣電阻，如也低，則說明另一端也有故障存在。在拆、裝端蓋的過程中，轉(zhuǎn)子可不裝。確定故障端后，一般對繞組端部稍微整形一下，并涂些絕緣漆即可，如未解決問題，則可在繞組端部外側(cè)容易與端蓋內(nèi)側(cè)接觸處墊上一層薄膜青殼紙，故障一般可消除。

尋找接地點的方法有如下幾點：

仔細檢查引出線和槽子兩端，發(fā)現(xiàn)引出線完好，槽子兩端槽口絕緣均無損壞，電機內(nèi)外很干凈，各處無灰塵及油污，這說明接地點在槽內(nèi)。

解開定子繞組的Y型連接點，分別測量各相對地絕緣電阻，查出有接地故障的相。

用一臺單相調(diào)壓器，其輸出端的相線接到有接地故障相的一端引出線上，零線接電機機殼，然后將調(diào)壓器從零開始升壓，至槽內(nèi)冒煙，這是立即將調(diào)壓器輸出電壓將為零并切斷電源，冒煙處就是接地點。整個操作過程都要注意安全，要將電機放在一塊絕緣墊上，切斷電源前人身不能接觸電機。處理方法是：把有接地槽的槽楔小心去除，然后將電機放入烘箱內(nèi)加熱，烘軟繞組，然后仔細將槽內(nèi)線匝取出，檢查各導線絕緣。絕緣被破壞的要涂漆、烘干，然后重新在槽內(nèi)放置槽絕緣紙，再將所取出的線匝放入槽內(nèi)，打入槽楔，繞組浸漆、烘干。如發(fā)現(xiàn)漆包線已被燒斷，要將兩根斷線頭分別拉到繞組的端部，然后找一根線徑相同的漆包線放入槽內(nèi)，在繞組兩端部接線。接頭要絞合錫焊、涂漆、烘干，再套上絕緣套管。捆扎端部時，要注意捆扎接頭。

產(chǎn)品承諾：
保?證?全新原裝進口,
保?證?安全準時發(fā)貨，
保?證售后服務質(zhì)量，
優(yōu)勢價格，大量現(xiàn)貨。

主營DCS系統(tǒng)配件
機器人系統(tǒng)配件
大型伺服系統(tǒng)配件
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MERLIN GERIN 32570

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