聯系(xi)電話：13917768445
聯系(xi)電話：13917768445
原因如下：
1、電源電壓不穩定
電源(yuan)電壓低、電動(dong)機繞組電流增大(da)、溫(wen)度(du)升高(gao)對(dui)絕緣(yuan)有(you)(you)損(sun)壞，易發(fa)生故障(zhang)造(zao)成(cheng)電動(dong)機損(sun)壞，所以電動(dong)機應有(you)(you)欠壓保護裝置(zhi)。當供電線路上接(jie)有(you)(you)大(da)容量電動(dong)機頻繁啟動(dong)或多臺電焊機引弧時，都會使供電線路電壓瞬(shun)時急劇下降，造(zao)成(cheng)線路電壓不穩定。
2、熱繼電(dian)器私定(ding)電(dian)流值偏小
熱(re)元(yuan)件(jian)的(de)(de)(de)(de)額(e)(e)定電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)按負荷(he)傾定電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)的(de)(de)(de)(de)1.1～1.25倍(bei)選擇，選擇熱(re)繼(ji)電(dian)(dian)(dian)(dian)器的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)調橄(gan)范圍為熱(re)元(yuan)件(jian)額(e)(e)定電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)的(de)(de)(de)(de)60％～100%，一般(ban)的(de)(de)(de)(de)負荷(he)接電(dian)(dian)(dian)(dian)動(dong)(dong)機l倍(bei)額(e)(e)定電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)來稚定，若重載(zai)啟動(dong)(dong)，熱(re)繼(ji)電(dian)(dian)(dian)(dian)器按l倍(bei)或＜l倍(bei)額(e)(e)定電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)枯定時，電(dian)(dian)(dian)(dian)動(dong)(dong)機啟動(dong)(dong)時啟動(dong)(dong)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)將遠(yuan)遠(yuan)超過(guo)電(dian)(dian)(dian)(dian)動(dong)(dong)機的(de)(de)(de)(de)額(e)(e)定電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)所以電(dian)(dian)(dian)(dian)動(dong)(dong)機啟動(dong)(dong)時頻繁跳閘。故(gu)重載(zai)啟動(dong)(dong)設備熱(re)繼(ji)電(dian)(dian)(dian)(dian)器整定電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)應(ying)帷定≤1倍(bei)額(e)(e)定電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)值。
3、電磁線(xian)圈鐵芯端面有灰塵、油(you)垢(gou)及銹蝕
電(dian)磁線(xian)圈的鐵(tie)芯端有灰(hui)塵、油垢及銹蝕現(xian)象時．使(shi)鐵(tie)芯端面接觸(chu)不良(liang)．致(zhi)使(shi)銜鐵(tie)不能牢固吸合．造成(cheng)控制回路中的輔(fu)助觸(chu)點(dian)接觸(chu)不牢．導致(zhi)頻繁跳閘(zha)。
擴展資料：
1、電(dian)(dian)機(ji)(ji)(ji)保(bao)(bao)護(hu)(hu)就是(shi)給電(dian)(dian)機(ji)(ji)(ji)全面的(de)保(bao)(bao)護(hu)(hu)，即在電(dian)(dian)機(ji)(ji)(ji)出(chu)現過載、缺相、堵轉(zhuan)、短路(lu)、過壓、欠壓、漏電(dian)(dian)、三相不(bu)平(ping)衡、過熱(re)、軸承磨損(sun)、定轉(zhuan)子偏心時，予以報(bao)警或保(bao)(bao)護(hu)(hu)；為電(dian)(dian)動(dong)機(ji)(ji)(ji)提供(gong)保(bao)(bao)護(hu)(hu)的(de)裝(zhuang)置(zhi)是(shi)電(dian)(dian)機(ji)(ji)(ji)保(bao)(bao)護(hu)(hu)器，包括熱(re)繼(ji)電(dian)(dian)器、電(dian)(dian)子式保(bao)(bao)護(hu)(hu)器和智能型保(bao)(bao)護(hu)(hu)器，目前大(da)型和重要電(dian)(dian)機(ji)(ji)(ji)一般采用智能性(xing)保(bao)(bao)護(hu)(hu)裝(zhuang)置(zhi)。
2、目前電機(ji)保護器已由過(guo)去的(de)機(ji)械式發展為電子式和(he)智能型，可直接顯示電機(ji)的(de)電流、電壓(ya)、溫度等(deng)參數，靈敏度高，可靠(kao)性高，功能多，調(diao)試(shi)方便，保護動作(zuo)后(hou)故障(zhang)種類一目了然，既減少了電機(ji)的(de)損(sun)壞，又極大方便了故障(zhang)的(de)判斷，有利于(yu)生(sheng)產現場的(de)故障(zhang)處理和(he)縮短恢復(fu)生(sheng)產時間(jian)。
3、另(ling)外(wai)，利(li)用(yong)電機(ji)(ji)(ji)氣(qi)隙(xi)磁場(chang)進行電機(ji)(ji)(ji)偏心(xin)檢測(ce)技術，使電機(ji)(ji)(ji)磨損狀(zhuang)態(tai)在線監測(ce)成為可能(neng)，通過(guo)曲(qu)線顯示電機(ji)(ji)(ji)偏心(xin)程度的變化(hua)趨勢，可早(zao)(zao)(zao)期發(fa)現軸承磨損和走(zou)內圓(yuan)、走(zou)外(wai)圓(yuan)等故(gu)障，做(zuo)到早(zao)(zao)(zao)發(fa)現，早(zao)(zao)(zao)處理，避免掃膛事故(gu)發(fa)生。
