電動機保(bao)護器的工作原理

電(dian)(dian)(dian)動(dong)機保(bao)護(hu)(hu)器(qi)由三相(xiang)電(dian)(dian)(dian)流(liu)(liu)(liu)互感器(qi)、檢(jian)測、放大(da)(da)、、調整電(dian)(dian)(dian)路(lu)和執行繼電(dian)(dian)(dian)器(qi)組成。檢(jian)測電(dian)(dian)(dian)路(lu)檢(jian)測到(dao)電(dian)(dian)(dian)流(liu)(liu)(liu)互感器(qi)感應的電(dian)(dian)(dian)流(liu)(liu)(liu)缺相(xiang)或大(da)(da)于(yu)設定值時，經(jing)放大(da)(da)器(qi)放大(da)(da)，使(shi)繼電(dian)(dian)(dian)器(qi)動(dong)作(zuo)(zuo)。繼電(dian)(dian)(dian)器(qi)觸(chu)頭串接于(yu)接觸(chu)器(qi)線圈供(gong)電(dian)(dian)(dian)回路(lu)中，繼電(dian)(dian)(dian)器(qi)動(dong)作(zuo)(zuo)后使(shi)接觸(chu)器(qi)斷電(dian)(dian)(dian)，起(qi)到(dao)保(bao)護(hu)(hu)電(dian)(dian)(dian)機作(zuo)(zuo)用。電(dian)(dian)(dian)路(lu)用于(yu)避開電(dian)(dian)(dian)機起(qi)動(dong)電(dian)(dian)(dian)流(liu)(liu)(liu)，其時長可(ke)調。調整電(dian)(dian)(dian)路(lu)用于(yu)根據(ju)被保(bao)護(hu)(hu)電(dian)(dian)(dian)機工作(zuo)(zuo)電(dian)(dian)(dian)流(liu)(liu)(liu)設置(zhi)動(dong)作(zuo)(zuo)電(dian)(dian)(dian)流(liu)(liu)(liu)。

馬達保(bao)護器（又名(ming)電動(dong)(dong)機(ji)保(bao)護器）的作(zuo)用是(shi)給電動(dong)(dong)機(ji)的保(bao)護，在電動(dong)(dong)機(ji)出現超時(shi)啟動(dong)(dong)、過流、欠流、斷(duan)相(xiang)、堵轉、短(duan)路、過壓(ya)、欠壓(ya)、漏電（接地）、三相(xiang)不平衡(heng)、過熱、軸承(cheng)磨(mo)損、定轉子偏(pian)心、外部故(gu)障、來(lai)電自(zi)啟動(dong)(dong)、反時(shi)，予以報(bao)警或保(bao)護的裝置。

熱繼電器的(de)檢(jian)測(ce)元件是雙(shuang)金屬(shu)片，由于(yu)起(qi)動電流(liu)及(ji)過(guo)載等過(guo)流(liu)沖擊，很(hen)容易使雙(shuang)金屬(shu)片產生疲勞效應，造

成刻度(du)值偏移，變頻器FTB-8-5R5P接(jie)線方法，動作不(bu)穩定(ding)，且這在生產(chan)現場卻較(jiao)難發現，后造

成過載不動作。而電(dian)子(zi)式(shi)電(dian)機(ji)保護器(qi)由

于檢測元件采用電流(liu)互感器，不存在發熱問(wen)題，其動作(zuo)穩(wen)定(ding)性與熱繼電器相(xiang)比有了質的飛躍

保(bao)護器(qi)給(gei)予現金的(de)集成電(dian)(dian)路及(ji)微(wei)機(ji)技術，采用微(wei)處(chu)理芯(xin)片作(zuo)(zuo)(zuo)為(wei)運算單元，運作(zuo)(zuo)(zuo)速度快(kuai)。可靠(kao)性高，并具有(you)完善的(de)通訊功能(neng)和模(mo)擬變送輸出能(neng)力。對電(dian)(dian)機(ji)提供(gong)多方面完善的(de)綜(zong)合(he)保(bao)護，，操作(zuo)(zuo)(zuo)方便(bian)，卻便(bian)于(yu)安裝維護等優點。保(bao)護范圍(wei)和靈敏度都比熱(re)繼(ji)電(dian)(dian)器(qi)高，可以有(you)效避免(mian)以往常常是電(dian)(dian)機(ji)燒壞，熱(re)繼(ji)電(dian)(dian)器(qi)卻不(bu)動作(zuo)(zuo)(zuo)的(de)情況(kuang)，是熱(re)繼(ji)電(dian)(dian)器(qi)的(de)理想升級產品(pin)。

使(shi)用環(huan)境(jing)溫度(du)(du)：-20°~55°C，相對濕度(du)(du)：《90%，無腐蝕氣體、無劇烈震動，沖(chong)擊(ji)的場所。

智能電(dian)(dian)機(ji)保(bao)護器(qi)的分(fen)為常(chang)(chang)(chang)規型(xing)(xing)和(he)純(chun)保(bao)護型(xing)(xing)，常(chang)(chang)(chang)規繼電(dian)(dian)器(qi)裝置K1出口(kou)(kou)機(ji)電(dian)(dian)為常(chang)(chang)(chang)閉(bi)點(dian)，保(bao)護動(dong)作打開，節(jie)點(dian)可(ke)手(shou)動(dong)自(zi)動(dong)復歸(gui)莫邪(xie)可(ke)以做(zuo)自(zi)動(dong)復歸(gui)，直接替代熱繼電(dian)(dian)器(qi)使(shi)用(yong)。純(chun)保(bao)護型(xing)(xing)K1出口(kou)(kou)為常(chang)(chang)(chang)開點(dian)。