點(diǎn)擊圖片查看大圖BN624A857H02
BN624A857H02
GYS751DC1-SA ZD5
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(hào)正榮潤(rùn)園一號(hào)樓1205室
大量現(xiàn)貨abb,施耐德等國(guó)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(jī)界面。
電話：15506917382 0591-62182535
傳真：0591-22989937 QQ：583745937 聯(lián)系人：王工
歡迎來(lái)電咨詢
努力造就實(shí)力，態(tài)度決定高度。
電動(dòng)機(jī)在運(yùn)行中經(jīng)常會(huì)出現(xiàn)一些不正運(yùn)行現(xiàn)象，如：電動(dòng)機(jī)振動(dòng)、電動(dòng)機(jī)過(guò)負(fù)荷、電動(dòng)機(jī)聲音異常、軸承和線圓溫度升高、電流增大及轉(zhuǎn)速變化等，這些異常雖然不會(huì)使電動(dòng)機(jī)保護(hù)動(dòng)作跳閘，但已影響到電動(dòng)機(jī)的安全運(yùn)行。某些異常運(yùn)行的重要電動(dòng)機(jī)，如不及時(shí)處理，不但會(huì)造成電動(dòng)機(jī)本身故障，還會(huì)引起停機(jī)、停爐等重大事故。
1、電動(dòng)機(jī)缺相運(yùn)行
現(xiàn)象：電流表指示上升或?yàn)榱悖浑妱?dòng)機(jī)本體溫度升高，同時(shí)振動(dòng)增加，聲音異常。
處理：電動(dòng)機(jī)的缺相運(yùn)行就是三相電動(dòng)機(jī)因某種原因造成回路一相斷開(kāi)時(shí)的運(yùn)行方式。首先檢查是電源缺相還是電動(dòng)機(jī)定子回路的故障。防止電動(dòng)機(jī)缺相運(yùn)行的方法之一就是靠值班員的判斷，發(fā)現(xiàn)后及時(shí)處理；二就是在電動(dòng)機(jī)回路中加裝缺相保護(hù)器。
2、電動(dòng)機(jī)本體發(fā)熱
現(xiàn)象：電動(dòng)機(jī)在運(yùn)行中本體溫度和溫升比正常運(yùn)行時(shí)顯著升高，而且電流增加。
處理：
?、贆z查所帶機(jī)械負(fù)荷是否有摩擦或卡澀現(xiàn)象。
?、跈z查機(jī)械負(fù)荷是否增大，若是，應(yīng)減少負(fù)荷，至溫度穩(wěn)定。
?、蹤z查電動(dòng)機(jī)通風(fēng)系統(tǒng)是否有故障，同時(shí)應(yīng)降低負(fù)荷。
④檢查電動(dòng)機(jī)各相電流是否平衡，判斷定子繞組故障還是缺相運(yùn)行。
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