依斯倍(bei)環(huan)保本(ben)著(zhu)管(guan)(guan)理(li)好客戶(hu)的(de)(de)每一滴水的(de)(de)原則，嚴(yan)格管(guan)(guan)理(li)公司，對(dui)公司所用設備都嚴(yan)謹選用，再小的(de)(de)制(zhi)作材料及元器件等也追求卓越的(de)(de)質量(liang)。熱繼(ji)電(dian)器是用于(yu)電動機或其它電氣設(she)備、電氣線路的(de)過載保護的(de)保護電器。

電(dian)(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)(ji)在(zai)實際運行中，如(ru)拖動(dong)(dong)(dong)生產機(ji)(ji)械(xie)進(jin)行工作過(guo)(guo)程(cheng)中，若(ruo)機(ji)(ji)械(xie)出現不(bu)正常的(de)(de)(de)情況(kuang)或(huo)電(dian)(dian)(dian)(dian)路異常使(shi)(shi)(shi)電(dian)(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)(ji)遇到(dao)過(guo)(guo)載(zai)(zai)(zai)，則電(dian)(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)(ji)轉速(su)下(xia)降、繞(rao)組(zu)中的(de)(de)(de)電(dian)(dian)(dian)(dian)流(liu)將增大(da)，使(shi)(shi)(shi)電(dian)(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)(ji)的(de)(de)(de)繞(rao)組(zu)溫度(du)升(sheng)高。若(ruo)過(guo)(guo)載(zai)(zai)(zai)電(dian)(dian)(dian)(dian)流(liu)不(bu)大(da)且(qie)過(guo)(guo)載(zai)(zai)(zai)的(de)(de)(de)時間(jian)較短(duan)，電(dian)(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)(ji)繞(rao)組(zu)不(bu)超過(guo)(guo)允許溫升(sheng)，這種過(guo)(guo)載(zai)(zai)(zai)是(shi)允許的(de)(de)(de)。但若(ruo)過(guo)(guo)載(zai)(zai)(zai)時間(jian)長，過(guo)(guo)載(zai)(zai)(zai)電(dian)(dian)(dian)(dian)流(liu)大(da)，電(dian)(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)(ji)繞(rao)組(zu)的(de)(de)(de)溫升(sheng)就會(hui)超過(guo)(guo)允許值(zhi)，使(shi)(shi)(shi)電(dian)(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)(ji)繞(rao)組(zu)老化，縮短(duan)電(dian)(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)(ji)的(de)(de)(de)使(shi)(shi)(shi)用壽命，嚴重(zhong)時甚至會(hui)使(shi)(shi)(shi)電(dian)(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)(ji)繞(rao)組(zu)燒毀。所以，這種過(guo)(guo)載(zai)(zai)(zai)是(shi)電(dian)(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)(ji)不(bu)能(neng)承(cheng)受的(de)(de)(de)。 [1]  熱繼電(dian)器(qi)就是(shi)利(li)用電(dian)流的熱效(xiao)應原理(li)，在出現(xian)電(dian)動(dong)機(ji)(ji)不能承受(shou)的過載時切(qie)斷電(dian)動(dong)機(ji)(ji)電(dian)路，為電(dian)動(dong)機(ji)(ji)提供過載保(bao)護的保(bao)護電(dian)器(qi)。

使用熱(re)(re)(re)繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)對電(dian)(dian)(dian)(dian)(dian)(dian)動機(ji)進行過載保(bao)護(hu)時(shi)，將熱(re)(re)(re)元件與(yu)電(dian)(dian)(dian)(dian)(dian)(dian)動機(ji)的定子(zi)繞(rao)組串聯，將熱(re)(re)(re)繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)的常閉(bi)觸(chu)(chu)頭串聯在(zai)交流(liu)(liu)接觸(chu)(chu)器(qi)的電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)線(xian)圈的控(kong)制(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)路中，并調(diao)節整定電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)調(diao)節旋(xuan)鈕，使人字形撥(bo)桿(gan)與(yu)推桿(gan)相距一適當距離。當電(dian)(dian)(dian)(dian)(dian)(dian)動機(ji)正(zheng)常工作時(shi)，通過熱(re)(re)(re)元件的電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)即為電(dian)(dian)(dian)(dian)(dian)(dian)動機(ji)的額定電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)，熱(re)(re)(re)元件發熱(re)(re)(re)，雙金屬(shu)片受熱(re)(re)(re)后彎曲，使推桿(gan)剛好(hao)與(yu)人字形撥(bo)桿(gan)接觸(chu)(chu)，而(er)又不(bu)能推動人字形撥(bo)桿(gan)。常閉(bi)觸(chu)(chu)頭處于閉(bi)合狀(zhuang)態，交流(liu)(liu)接觸(chu)(chu)器(qi)保(bao)持吸(xi)合，電(dian)(dian)(dian)(dian)(dian)(dian)動機(ji)正(zheng)常運行。

若電(dian)動(dong)機(ji)出現過載情況，繞組中電(dian)流(liu)增(zeng)大，通過熱繼電(dian)器(qi)元件中的(de)電(dian)流(liu)增(zeng)大使雙金屬片溫度升得更高，彎曲(qu)程度加大，推動(dong)人字形撥(bo)桿，人字形撥(bo)桿推動(dong)常閉觸(chu)(chu)頭(tou)，使觸(chu)(chu)頭(tou)斷(duan)(duan)開(kai)而斷(duan)(duan)開(kai)交流(liu)接(jie)觸(chu)(chu)器(qi)線圈電(dian)路，使接(jie)觸(chu)(chu)器(qi)釋(shi)放、切斷(duan)(duan)電(dian)動(dong)機(ji)的(de)電(dian)源，電(dian)動(dong)機(ji)停(ting)車而得到保護。

熱(re)(re)繼電(dian)器其它(ta)部分的(de)作(zuo)用如下：人字形撥桿(gan)的(de)左臂(bei)也用雙金屬(shu)片(pian)制(zhi)成，當(dang)環境(jing)溫度(du)(du)發生變(bian)化時，主電(dian)路(lu)中的(de)雙金屬(shu)片(pian)會產生一定的(de)變(bian)形彎(wan)曲，這時人字形撥桿(gan)的(de)左臂(bei)也會發生同方向的(de)變(bian)形彎(wan)曲，從而(er)使人字形撥桿(gan)與推桿(gan)之(zhi)間的(de)距(ju)離基本保(bao)持不變(bian)，保(bao)證(zheng)熱(re)(re)繼電(dian)器動作(zuo)的(de)準確性。這種(zhong)作(zuo)用稱(cheng)溫度(du)(du)補償作(zuo)用。

螺(luo)(luo)釘(ding)是常閉觸(chu)頭(tou)復(fu)(fu)位(wei)(wei)方(fang)(fang)(fang)式(shi)調(diao)(diao)節螺(luo)(luo)釘(ding)。當螺(luo)(luo)釘(ding)位(wei)(wei)置靠左時(shi)(shi)，電(dian)(dian)(dian)(dian)動(dong)(dong)機過載后，常閉觸(chu)頭(tou)斷開，電(dian)(dian)(dian)(dian)動(dong)(dong)機停車(che)后，熱(re)(re)繼(ji)(ji)電(dian)(dian)(dian)(dian)器(qi)雙金屬片冷卻復(fu)(fu)位(wei)(wei)。常閉觸(chu)頭(tou)的(de)動(dong)(dong)觸(chu)頭(tou)在(zai)彈簧的(de)作用下會自(zi)動(dong)(dong)復(fu)(fu)位(wei)(wei)。此時(shi)(shi)熱(re)(re)繼(ji)(ji)電(dian)(dian)(dian)(dian)器(qi)為(wei)自(zi)動(dong)(dong)復(fu)(fu)位(wei)(wei)狀態(tai)。將螺(luo)(luo)釘(ding)逆時(shi)(shi)針(zhen)旋轉(zhuan)向右(you)調(diao)(diao)到一定(ding)位(wei)(wei)置時(shi)(shi)，若這時(shi)(shi)電(dian)(dian)(dian)(dian)動(dong)(dong)機過載，熱(re)(re)繼(ji)(ji)電(dian)(dian)(dian)(dian)器(qi)的(de)常閉觸(chu)頭(tou)斷開。其動(dong)(dong)觸(chu)頭(tou)將擺到右(you)側一新的(de)平衡位(wei)(wei)置。電(dian)(dian)(dian)(dian)動(dong)(dong)機斷電(dian)(dian)(dian)(dian)停車(che)后，動(dong)(dong)觸(chu)頭(tou)不能復(fu)(fu)位(wei)(wei)。必須按(an)動(dong)(dong)復(fu)(fu)位(wei)(wei)按(an)鈕后動(dong)(dong)觸(chu)頭(tou)方(fang)(fang)(fang)能復(fu)(fu)位(wei)(wei)。此時(shi)(shi)熱(re)(re)繼(ji)(ji)電(dian)(dian)(dian)(dian)器(qi)為(wei)手(shou)動(dong)(dong)復(fu)(fu)位(wei)(wei)狀態(tai)。若電(dian)(dian)(dian)(dian)動(dong)(dong)機過載是故障性(xing)的(de)，為(wei)了避免再次輕易地起動(dong)(dong)電(dian)(dian)(dian)(dian)動(dong)(dong)機，熱(re)(re)繼(ji)(ji)電(dian)(dian)(dian)(dian)器(qi)宜采(cai)用手(shou)動(dong)(dong)復(fu)(fu)位(wei)(wei)方(fang)(fang)(fang)式(shi)。若要將熱(re)(re)繼(ji)(ji)電(dian)(dian)(dian)(dian)器(qi)由手(shou)動(dong)(dong)復(fu)(fu)位(wei)(wei)方(fang)(fang)(fang)式(shi)調(diao)(diao)至自(zi)動(dong)(dong)復(fu)(fu)位(wei)(wei)方(fang)(fang)(fang)式(shi)，只(zhi)需將復(fu)(fu)位(wei)(wei)調(diao)(diao)節螺(luo)(luo)釘(ding)順時(shi)(shi)針(zhen)旋進(jin)至適當位(wei)(wei)置即可。對于細節的(de)嚴(yan)格把控，源(yuan)于我(wo)們(men)依斯倍對客(ke)戶服務態(tai)度的(de)認真負責(ze)，也(ye)是我(wo)們(men)依斯倍人時(shi)(shi)刻嚴(yan)格遵循的(de)生產制(zhi)造理念(nian)。

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【文章來源：熱繼電器工作(zuo)(zuo)原理和基本作(zuo)(zuo)用】