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一、熔斷器是什么東西

熔(rong)(rong)(rong)(rong)斷(duan)(duan)器(qi)(qi)(qi)是一種電(dian)(dian)路的(de)安(an)全保護(hu)(hu)裝(zhuang)置，當電(dian)(dian)流超過規定值時，通過本(ben)身發熱使熔(rong)(rong)(rong)(rong)體(ti)熔(rong)(rong)(rong)(rong)斷(duan)(duan)，從而斷(duan)(duan)開(kai)電(dian)(dian)路，廣泛應用(yong)于高(gao)低壓配(pei)電(dian)(dian)系(xi)統(tong)和(he)控(kong)制系(xi)統(tong)以及用(yong)電(dian)(dian)設(she)備中，作為(wei)短路和(he)過電(dian)(dian)流的(de)保護(hu)(hu)器(qi)(qi)(qi)，是應用(yong)比較普遍的(de)保護(hu)(hu)器(qi)(qi)(qi)件之一，具有(you)(you)價格便(bian)宜、體(ti)積小、短路分(fen)斷(duan)(duan)能力較強(qiang)、切斷(duan)(duan)短路更(geng)為(wei)安(an)全等諸多特點(dian)。熔(rong)(rong)(rong)(rong)斷(duan)(duan)器(qi)(qi)(qi)種類眾多，常用(yong)的(de)主要有(you)(you)插入式熔(rong)(rong)(rong)(rong)斷(duan)(duan)器(qi)(qi)(qi)、螺旋式熔(rong)(rong)(rong)(rong)斷(duan)(duan)器(qi)(qi)(qi)、封閉式熔(rong)(rong)(rong)(rong)斷(duan)(duan)器(qi)(qi)(qi)、快速熔(rong)(rong)(rong)(rong)斷(duan)(duan)器(qi)(qi)(qi)、自復熔(rong)(rong)(rong)(rong)斷(duan)(duan)器(qi)(qi)(qi)等。

二、熔斷器有什么用

熔斷器俗稱保(bao)險絲，是配電(dian)(dian)(dian)(dian)系統(tong)、控制系統(tong)和用(yong)電(dian)(dian)(dian)(dian)設備中(zhong)常(chang)用(yong)的保(bao)護(hu)器件(jian)，它的作(zuo)用(yong)主要(yao)是在電(dian)(dian)(dian)(dian)路(lu)(lu)發(fa)生故障或異常(chang)時(shi)，由于線路(lu)(lu)內電(dian)(dian)(dian)(dian)流劇增，導(dao)線溫(wen)度升高，熔斷器會在高溫(wen)下自身熔斷，從而切(qie)斷電(dian)(dian)(dian)(dian)流，起到保(bao)護(hu)電(dian)(dian)(dian)(dian)路(lu)(lu)安(an)全運行，避免(mian)發(fa)生燒毀電(dian)(dian)(dian)(dian)路(lu)(lu)、燒壞元器件(jian)、發(fa)生火災等事故的作(zuo)用(yong)。

三、熔斷器的型號含義

熔(rong)(rong)斷(duan)(duan)(duan)(duan)器(qi)(qi)的(de)(de)型(xing)號一(yi)般是(shi)有固定(ding)規則的(de)(de)，它(ta)的(de)(de)型(xing)號標(biao)識由字(zi)母(mu)和數字(zi)組(zu)成，第(di)一(yi)位(wei)(wei)一(yi)般都是(shi)R，這(zhe)是(shi)熔(rong)(rong)斷(duan)(duan)(duan)(duan)器(qi)(qi)的(de)(de)代號；第(di)二位(wei)(wei)則是(shi)熔(rong)(rong)斷(duan)(duan)(duan)(duan)器(qi)(qi)的(de)(de)型(xing)式(shi)(shi)(shi)代號，由字(zi)母(mu)組(zu)成，C表(biao)(biao)(biao)(biao)示(shi)插(cha)入式(shi)(shi)(shi)、L表(biao)(biao)(biao)(biao)示(shi)螺旋(xuan)式(shi)(shi)(shi)、M表(biao)(biao)(biao)(biao)示(shi)無填料(liao)(liao)封閉(bi)(bi)管(guan)式(shi)(shi)(shi)、L表(biao)(biao)(biao)(biao)示(shi)有填料(liao)(liao)封閉(bi)(bi)管(guan)式(shi)(shi)(shi)；S表(biao)(biao)(biao)(biao)示(shi)快速式(shi)(shi)(shi)；第(di)三位(wei)(wei)是(shi)數字(zi)，表(biao)(biao)(biao)(biao)示(shi)熔(rong)(rong)斷(duan)(duan)(duan)(duan)器(qi)(qi)的(de)(de)設計代號；第(di)四位(wei)(wei)表(biao)(biao)(biao)(biao)示(shi)的(de)(de)是(shi)熔(rong)(rong)斷(duan)(duan)(duan)(duan)器(qi)(qi)的(de)(de)額定(ding)電流（有的(de)(de)還會(hui)標(biao)注(zhu)熔(rong)(rong)體的(de)(de)額定(ding)電流）。比如RL6-25就表(biao)(biao)(biao)(biao)示(shi)熔(rong)(rong)斷(duan)(duan)(duan)(duan)器(qi)(qi)額定(ding)電流為(wei)25A的(de)(de)螺旋(xuan)式(shi)(shi)(shi)熔(rong)(rong)斷(duan)(duan)(duan)(duan)器(qi)(qi)。

四、熔斷器選型方法

熔斷器型號的選擇一般包括熔斷器類型選擇和熔體額定電流確定兩個方面：1、熔斷器類型的選擇：在選擇熔斷器類型時，應根據負載的保護特性和短路電流大小來選擇。2、熔體與熔斷器額定電流的確定：熔體額定電流大小與負載大小、負載性質有關。除了型號以外，還要注意所選擇的熔斷器品牌，畢竟關系到電路安全，一定要選擇正規的(de)產(chan)品。

五、熔斷器工作原理介紹

熔(rong)(rong)斷器(qi)在(zai)正常工作(zuo)情況下(xia)，電流(liu)(liu)從(cong)引線端子A進入，由出線端子B引出，正常工作(zuo)，當出現短路故障時(shi)，短路電流(liu)(liu)通(tong)過(guo)熔(rong)(rong)斷器(qi)，根(gen)據焦耳定(ding)律，通(tong)過(guo)的(de)(de)電流(liu)(liu)越(yue)大，產生的(de)(de)熱(re)量也越(yue)大，在(zai)高溫下(xia)，熔(rong)(rong)斷器(qi)內部(bu)的(de)(de)熔(rong)(rong)體受熱(re)熔(rong)(rong)斷，從(cong)而(er)斷開電流(liu)(liu)，起到保護電路的(de)(de)作(zuo)用。