聯(lian)系電(dian)話：13917768445
聯(lian)系電(dian)話：13917768445
熱保護(hu)(hu)和(he)過載保護(hu)(hu)是常見電動機(ji)保護(hu)(hu)器中兩(liang)(liang)項基本功能，那么這兩(liang)(liang)種功能有(you)什么區(qu)別呢(ni)，接(jie)下來小編為大家做一個介紹。
1、熱(re)(re)保護：熱(re)(re)保護是(shi)反(fan)應(ying)溫度(du)高低(di)的(de)保護，電動機的(de)保護方(fang)式是(shi)以絕(jue)緣(yuan)發熱(re)(re)溫度(du)為依據的(de)，例如過載保護雖然反(fan)應(ying)的(de)物(wu)理量是(shi)電流，但實(shi)(shi)質上是(shi)熱(re)(re)量限(xian)制，在電機運行中，有這樣(yang)一種情況 即電動機的(de)實(shi)(shi)際(ji)運行電流未超過額(e)定值，但由(you)于(yu)通(tong)風不良，環(huan)境溫度(du)高等原(yuan)因，電動機往往已過熱(re)(re)，達(da)到了危險程度(du)，還應(ying)實(shi)(shi)施(shi)溫度(du)保護。
熱(re)(re)保護是直(zhi)接(jie)裝(zhuang)(zhuang)在電(dian)(dian)動(dong)機(ji)本體上，直(zhi)接(jie)感(gan)受其溫(wen)度(du)。通常由(you)電(dian)(dian)機(ji)制造商完成，將其裝(zhuang)(zhuang)于繞組(zu)端部(bu)或(huo)定子(zi)鐵(tie)芯槽(cao)中，也(ye)可以裝(zhuang)(zhuang)在軸承(cheng)室檢測軸承(cheng)溫(wen)度(du)。常用pTc熱(re)(re)敏電(dian)(dian)阻(zu)(zu)作(zuo)報警和(he)跳(tiao)閘(zha)，用pt100鉑熱(re)(re)電(dian)(dian)阻(zu)(zu)測量溫(wen)度(du)。
2、過(guo)(guo)(guo)載保(bao)(bao)護(hu)(hu)：作(zuo)(zuo)(zuo)為電(dian)(dian)(dian)(dian)機保(bao)(bao)護(hu)(hu)的(de)一項重要(yao)措(cuo)施(shi)，過(guo)(guo)(guo)載保(bao)(bao)護(hu)(hu)應用廣泛，它的(de)原理是(shi)(shi)電(dian)(dian)(dian)(dian)動(dong)(dong)機過(guo)(guo)(guo)載運行時(shi)，電(dian)(dian)(dian)(dian)流(liu)增加，繞組(zu)過(guo)(guo)(guo)熱，若時(shi)間過(guo)(guo)(guo)長就會損壞絕緣。過(guo)(guo)(guo)載保(bao)(bao)護(hu)(hu)的(de)功(gong)能(neng)(neng)是(shi)(shi)及時(shi)切斷(duan)電(dian)(dian)(dian)(dian)源，限制電(dian)(dian)(dian)(dian)動(dong)(dong)機過(guo)(guo)(guo)熱時(shi)間，以防絕緣損壞。它分為兩種(zhong)方(fang)式(shi)，一種(zhong)是(shi)(shi)熱效應元(yuan)件動(dong)(dong)作(zuo)(zuo)(zuo)控(kong)制觸點的(de)接通(tong)和斷(duan)開，其典(dian)型代表(biao)是(shi)(shi)使(shi)用雙(shuang)金(jin)屬片動(dong)(dong)作(zuo)(zuo)(zuo)的(de)普通(tong)熱繼電(dian)(dian)(dian)(dian)器(qi)(qi)(qi)。另外一種(zhong)是(shi)(shi)使(shi)用過(guo)(guo)(guo)電(dian)(dian)(dian)(dian)流(liu)檢(jian)測電(dian)(dian)(dian)(dian)路直(zhi)接檢(jian)測電(dian)(dian)(dian)(dian)流(liu)大小，最終驅動(dong)(dong)電(dian)(dian)(dian)(dian)磁繼電(dian)(dian)(dian)(dian)器(qi)(qi)(qi)或(huo)固(gu)態繼電(dian)(dian)(dian)(dian)器(qi)(qi)(qi)斷(duan)開電(dian)(dian)(dian)(dian)源其典(dian)型代表(biao)是(shi)(shi)過(guo)(guo)(guo)電(dian)(dian)(dian)(dian)流(liu)繼電(dian)(dian)(dian)(dian)器(qi)(qi)(qi)和各(ge)種(zhong)類型的(de)電(dian)(dian)(dian)(dian)動(dong)(dong)機保(bao)(bao)護(hu)(hu)器(qi)(qi)(qi)，它也具(ju)有短路保(bao)(bao)護(hu)(hu)功(gong)能(neng)(neng)。
除此之外，電(dian)動(dong)機(ji)保(bao)護(hu)(hu)器(qi)還有啟動(dong)保(bao)護(hu)(hu)、過壓保(bao)護(hu)(hu)、斷相(xiang)保(bao)護(hu)(hu)、堵(du)轉保(bao)護(hu)(hu)、短(duan)路保(bao)護(hu)(hu)等不(bu)同形(xing)式的(de)保(bao)護(hu)(hu)形(xing)勢，用戶在選擇電(dian)動(dong)機(ji)保(bao)護(hu)(hu)器(qi)的(de)時候可以(yi)根(gen)據(ju)自身實際情(qing)況(kuang)進行選擇。
