電動機作為一種拖動機械因具有結構簡單、價格低廉、使用維護方便等優點，在國民經濟各個方面被廣泛采用。在當代，隨著電子技術的發展和智能電動機保護器技術的成熟而普及率越來越高。智能電動機保護器采用了微處理器技術，不僅解決了傳統的熱繼整定粗糙、不能實現斷相保護，重復性差、測量參數誤差大的缺點。保護器通過電流來判斷斷相故障，軟件模擬熱積累過程的方法來實現過載保護等方法保證了電機的可靠運行，而微處理器強大的擴展性包括開關量輸入、繼電器輸出，4~20mA變送輸出、RS485通訊等很好的滿足了控制系統的“四遙”功能。電動機保護器提高了電動機運行的可靠性和系統智能化要求，因此保護器的可靠運行起著舉足輕重的作用，同時也對保護器抗外界干擾提出了比較現實的要求。

電動(dong)機(ji)保(bao)護器的工作原理(li)

電(dian)(dian)(dian)(dian)(dian)動(dong)(dong)機保(bao)護器(qi)(qi)由三相(xiang)電(dian)(dian)(dian)(dian)(dian)流互感器(qi)(qi)、檢測(ce)(ce)、放(fang)(fang)大(da)、、調(diao)(diao)整電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)和執行繼(ji)電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)組成。檢測(ce)(ce)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)檢測(ce)(ce)到電(dian)(dian)(dian)(dian)(dian)流互感器(qi)(qi)感應的電(dian)(dian)(dian)(dian)(dian)流缺相(xiang)或大(da)于(yu)設定值(zhi)時，經放(fang)(fang)大(da)器(qi)(qi)放(fang)(fang)大(da)，使繼(ji)電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)動(dong)(dong)作。繼(ji)電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)觸頭(tou)串接(jie)于(yu)接(jie)觸器(qi)(qi)線圈(quan)供電(dian)(dian)(dian)(dian)(dian)回路(lu)(lu)中，繼(ji)電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)動(dong)(dong)作后使接(jie)觸器(qi)(qi)斷電(dian)(dian)(dian)(dian)(dian)，起到保(bao)護電(dian)(dian)(dian)(dian)(dian)機作用(yong)。電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)用(yong)于(yu)避開電(dian)(dian)(dian)(dian)(dian)機起動(dong)(dong)電(dian)(dian)(dian)(dian)(dian)流，軟(ruan)啟動(dong)(dong)器(qi)(qi)FT-PR-400KW接(jie)線方法(fa)，其時長可調(diao)(diao)。調(diao)(diao)整電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)用(yong)于(yu)根據被保(bao)護電(dian)(dian)(dian)(dian)(dian)機工(gong)作電(dian)(dian)(dian)(dian)(dian)流設置動(dong)(dong)作電(dian)(dian)(dian)(dian)(dian)流。

馬達保(bao)護(hu)器(qi)（又名(ming)電(dian)動(dong)(dong)(dong)機保(bao)護(hu)器(qi)）的作用(yong)是給電(dian)動(dong)(dong)(dong)機的保(bao)護(hu)，在(zai)電(dian)動(dong)(dong)(dong)機出現超(chao)時(shi)啟(qi)動(dong)(dong)(dong)、過(guo)流、欠流、斷相(xiang)、堵轉、短路(lu)、過(guo)壓、欠壓、漏電(dian)（接地(di)）、三相(xiang)不平衡(heng)、過(guo)熱(re)、軸承磨損、定轉子偏(pian)心、外部故障、來電(dian)自啟(qi)動(dong)(dong)(dong)、反時(shi)，予(yu)以(yi)報(bao)警或(huo)保(bao)護(hu)的裝(zhuang)置。

電(dian)動(dong)機保護(hu)(hu)器（電(dian)機保護(hu)(hu)器）的(de)(de)電(dian)流整定(ding)用刻(ke)度(du)盤表(biao)示(shi)，非常醒目方(fang)便(bian)，使(shi)用時只需(xu)把刻(ke)度(du)調節到與電(dian)動(dong)機額定(ding)電(dian)流相對應的(de)(de)值(zhi)。克服了(le)目前國內同類產品需(xu)滿載(zai)調試的(de)(de)困難。這樣(yang)使(shi)用電(dian)動(dong)機保護(hu)(hu)器（電(dian)機保護(hu)(hu)器）后，既能(neng)使(shi)電(dian)動(dong)機充分發揮過載(zai)能(neng)力，又能(neng)使(shi)電(dian)動(dong)機得到可(ke)靠的(de)(de)保護(hu)(hu)

該電動(dong)機(ji)保護器(qi)（電機(ji)保護器(qi)）具有智能(neng)特性，保護器(qi)不(bu)但能(neng)直接串接于控制回路，還能(neng)自(zi)動(dong)識別手

動(dong)控制回(hui)路(lu)和自動(dong)控制回(hui)路(lu)。使用時無需象熱繼電器那樣調節復位方(fang)式(shi)。保護器動(dong)作后，對(dui)于手動(dong)控制回(hui)

路，能(neng)自動(dong)復(fu)位，而對于(yu)自動(dong)控制回路，又能(neng)己憶自鎖，避免(mian)電動(dong)機(ji)在故障狀態(tai)，重復(fu)起動(dong)，加(jia)劇(ju)電動(dong)機(ji)

的損壞。

富田-軟啟動器FT-PR-400KW接線方法由秦皇島富田電氣設備有限公司提供。秦皇島富田電氣設備有限公司在儀器儀表這一領域傾注了諸多的熱忱和熱情，富田電氣一直以客戶為中心、為客戶創造價值的理念、以品質、服務來贏得市場，衷心希望能與社會各界合作，共創成功，共創輝煌。相關業務歡迎垂詢，聯系人：付先生。