電機保(bao)護(hu)器(qi)主要是斷線保(bao)護(hu)，三(san)相(xiang)電動(dong)機正常情況是三(san)相(xiang)具備(bei)平衡(heng)的，如果缺相(xiang)，另外兩相(xiang)電流(liu)增大(da)，很快就會(hui)燒(shao)毀線圈(quan)。有了電機保(bao)護(hu)器(qi)，當(dang)三(san)相(xiang)電流(liu)不平衡(heng)時到一定程度時，零序保(bao)護(hu)就會(hui)動(dong)作，讓電動(dong)機停止(zhi)運(yun)行，避免燒(shao)毀線圈(quan)。

一． 產品概述

1.產品特點

本產品是(shi)一(yi)種(zhong)智(zhi)能(neng)型電源(yuan)保(bao)護器件，采用微控(kong)制器和(he)數字(zi)處理技術，集電壓顯示、過欠壓保(bao)護、缺(que)相保(bao)護、相序保(bao)護和(he)計時計次功能(neng)于一(yi)體，中文(wen)液晶顯示，具有操作簡便、體積小巧、可靠性(xing)高等(deng)特(te)點。

2.適用范圍

本產品可廣泛(fan)應用于各(ge)種低壓(ya)電器(qi)(qi)控制系統，替代傳統的相序繼電器(qi)(qi)和過(guo)欠(qian)壓(ya)保(bao)護器(qi)(qi)。

電(dian)動(dong)機綜(zong)合(he)保(bao)護器原理

·電動機綜合保(bao)護器原理過流(liu)(liu)和(he)過壓。綜合保(bao)護器配合交流(liu)(liu)接觸器使用(yong)，【在正(zheng)常(chang)工作(zuo)的(de)線(xian)路中】保(bao)護器有四個接線(xian)柱，1，2是電源與接觸器線(xian)圈并(bing)聯(lian)，3，4是開關，串聯(lian)在控制(zhi)回路中即可。再用(yong)表測(ce)額定電流(liu)(liu)，調適保(bao)護器檢測(ce)電流(liu)(liu)，已達(da)到預期的(de)效(xiao)果

；過載倍數小，動(dong)作(zuo)時限長(chang))進入保(bao)(bao)護狀態，結束(shu)則(ze)通過交流接觸器(qi)斷開電動(dong)機(ji)(ji)(ji)電源，保(bao)(bao)護電動(dong)機(ji)(ji)(ji)的(de)安(an)全。 一、工作(zuo)原理 　　電動(dong)機(ji)(ji)(ji)綜合保(bao)(bao)護器(qi)的(de)電氣原理圖(tu)見(jian)圖(tu)l，與電動(dong)機(ji)(ji)(ji)的(de)配合接線(xian)見(jian)圖(tu)2。圖(tu)l中，變壓器(qi)T二次側的(de)15V電壓，

.電(dian)(dian)動(dong)(dong)(dong)(dong)機綜(zong)合(he)保護(hu)(hu)器(qi)原(yuan)(yuan)理與(yu)故障檢(jian)驗電(dian)(dian)路圖(tu)(tu)(tu)；過(guo)載倍(bei)數小，軟啟動(dong)(dong)(dong)(dong)器(qi)FT-PR-450KW接線(xian)方法，動(dong)(dong)(dong)(dong)作時限(xian)長)進進保護(hu)(hu)狀態，結束則(ze)通過(guo)交流(liu)接觸器(qi)斷開電(dian)(dian)動(dong)(dong)(dong)(dong)機電(dian)(dian)源，保護(hu)(hu)電(dian)(dian)動(dong)(dong)(dong)(dong)機的(de)安全。 一、工作原(yuan)(yuan)理　　電(dian)(dian)動(dong)(dong)(dong)(dong)機綜(zong)合(he)保護(hu)(hu)器(qi)的(de)電(dian)(dian)氣(qi)原(yuan)(yuan)理圖(tu)(tu)(tu)見(jian)圖(tu)(tu)(tu)l，與(yu)電(dian)(dian)動(dong)(dong)(dong)(dong)機的(de)配(pei)合(he)接線(xian)見(jian)圖(tu)(tu)(tu)2。圖(tu)(tu)(tu)l中(zhong)，

·電(dian)(dian)(dian)動(dong)機(ji)(ji)綜合(he)保(bao)護(hu)(hu)器(qi)（電(dian)(dian)(dian)動(dong)機(ji)(ji)保(bao)護(hu)(hu)器(qi)）電(dian)(dian)(dian)動(dong)機(ji)(ji)綜合(he)保(bao)護(hu)(hu)器(qi)（電(dian)(dian)(dian)動(dong)機(ji)(ji)保(bao)護(hu)(hu)器(qi)）是(shi)以金屬(shu)電(dian)(dian)(dian)阻電(dian)(dian)(dian)壓效應(ying)原(yuan)理實(shi)現電(dian)(dian)(dian)動(dong)機(ji)(ji)各種保(bao)護(hu)(hu)的，區(qu)別于(yu)熱(re)繼電(dian)(dian)(dian)器(qi)的金屬(shu)電(dian)(dian)(dian)阻熱(re)效應(ying)原(yuan)理，也(ye)區(qu)別于(yu)穿芯(xin)式電(dian)(dian)(dian)動(dong)機(ji)(ji)綜合(he)保(bao)護(hu)(hu)器(qi)（電(dian)(dian)(dian)動(dong)機(ji)(ji)保(bao)護(hu)(hu)器(qi)）電(dian)(dian)(dian)流互感(gan)器(qi)磁效應(ying)原(yuan)理。其優點是(shi)1、體積(ji)少，方(fang)便實(shi)現與(yu)熱(re)繼電(dian)(dian)(dian)器(qi)互換。

·電動(dong)機(ji)(ji)保(bao)護(hu)器工作原理電動(dong)機(ji)(ji)保(bao)護(hu)器設計(ji)原理 電子式(shi)電動(dong)機(ji)(ji)保(bao)護(hu)器采(cai)用的(de)軟(ruan)件算法(fa)和(he)可靠的(de)硬(ying)件設計(ji)，對電動(dong)機(ji)(ji)的(de)過載(zai)、斷相...淺談(tan)電動(dong)機(ji)(ji)保(bao)護(hu)器設計(ji)原理 電子式(shi)電動(dong)機(ji)(ji)保(bao)護(hu)器采(cai)用的(de)軟(ruan)件算法(fa)和(he)可靠的(de)硬(ying)件

電(dian)(dian)子式電(dian)(dian)動機(ji)保(bao)護器（電(dian)(dian)機(ji)保(bao)護器）解決了熱繼電(dian)(dian)器功能(neng)單一的問題，新(xin)產(chan)生了需工(gong)作電(dian)(dian)源的弊端。雖然

電(dian)(dian)子線路(lu)放大、驅(qu)動需工(gong)作電(dian)(dian)源的要求在情理之中，但是(shi)對電(dian)(dian)動機(ji)保護器（電(dian)(dian)機(ji)保護器）的應用帶(dai)來了一

系列的問題，如(ru)用戶使用前必須認準電源接線端子，了(le)解(jie)電源電壓等(deng)級等(deng)諸(zhu)多不便(bian)。另外，由于電動機保

護器（電機保護器）需要(yao)連(lian)續工(gong)作，這樣因(yin)電網電壓(ya)的(de)波(bo)動、干擾、自身的(de)發熱等因(yin)素，使其的(de)故障率也(ye)

很高。據我廠曾對使用過的(de)電(dian)(dian)子式(shi)電(dian)(dian)動(dong)(dong)機保(bao)(bao)(bao)護器(qi)（電(dian)(dian)機保(bao)(bao)(bao)護器(qi)）的(de)不(bu)完全統計，電(dian)(dian)動(dong)(dong)機保(bao)(bao)(bao)護器(qi)（電(dian)(dian)機保(bao)(bao)(bao)護

器）的(de)自(zi)身故障一半以(yi)上均出自(zi)電(dian)源部分，這大(da)大(da)挫傷了電(dian)氣工作(zuo)者使用電(dian)子式電(dian)動機(ji)保護(hu)器（電(dian)機(ji)保護(hu)

器）的熱情