福州卓凱電子科技有限公司

地址：福州市閩侯西江濱大道77號正榮潤園一號樓1205室

大量現(xiàn)貨abb,施耐德等國外多家品牌，產(chǎn)品涉及變頻器，儀器儀表，變送器，可編程控制器plc和人機界面。

電話：15506917382    0591-62182535 

傳真：0591-22989937   QQ：583745937  聯(lián)系人：王工

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努力造就實力，態(tài)度決定高度。

電動機在運行中經(jīng)常會出現(xiàn)一些不正運行現(xiàn)象，如：電動機振動、電動機過負荷、電動機聲音異常、軸承和線圓溫度升高、電流增大及轉速變化等，這些異常雖然不會使電動機保護動作跳閘，但已影響到電動機的安全運行。某些異常運行的重要電動機，如不及時處理，不但會造成電動機本身故障，還會引起停機、停爐等重大事故。

　　1、電動機缺相運行

　　現(xiàn)象：電流表指示上升或為零；電動機本體溫度升高，同時振動增加，聲音異常。

　　處理：電動機的缺相運行就是三相電動機因某種原因造成回路一相斷開時的運行方式。首先檢查是電源缺相還是電動機定子回路的故障。防止電動機缺相運行的方法之一就是靠值班員的判斷，發(fā)現(xiàn)后及時處理；二就是在電動機回路中加裝缺相保護器。

　　2、電動機本體發(fā)熱

　　現(xiàn)象：電動機在運行中本體溫度和溫升比正常運行時顯著升高，而且電流增加。

　　處理：

　?、贆z查所帶機械負荷是否有摩擦或卡澀現(xiàn)象。

　?、跈z查機械負荷是否增大，若是，應減少負荷，至溫度穩(wěn)定。

　?、蹤z查電動機通風系統(tǒng)是否有故障，同時應降低負荷。

　?、軝z查電動機各相電流是否平衡，判斷定子繞組故障還是缺相運行。

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