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熔斷器行業簡介

一、熔斷器是什么東西

熔(rong)(rong)(rong)斷(duan)(duan)(duan)器(qi)(qi)(qi)是一(yi)種電(dian)路的(de)安(an)全(quan)保(bao)護裝(zhuang)置，當(dang)電(dian)流(liu)超過(guo)(guo)規定(ding)值時(shi)，通過(guo)(guo)本身發(fa)熱使熔(rong)(rong)(rong)體熔(rong)(rong)(rong)斷(duan)(duan)(duan)，從(cong)而(er)斷(duan)(duan)(duan)開電(dian)路，廣泛應(ying)用(yong)于(yu)高低(di)壓配(pei)電(dian)系統(tong)和控制系統(tong)以及用(yong)電(dian)設備(bei)中，作為短路和過(guo)(guo)電(dian)流(liu)的(de)保(bao)護器(qi)(qi)(qi)，是應(ying)用(yong)比較普遍的(de)保(bao)護器(qi)(qi)(qi)件之一(yi)，具有價格便宜(yi)、體積小(xiao)、短路分斷(duan)(duan)(duan)能力較強、切斷(duan)(duan)(duan)短路更(geng)為安(an)全(quan)等諸多特點。熔(rong)(rong)(rong)斷(duan)(duan)(duan)器(qi)(qi)(qi)種類眾多，常用(yong)的(de)主要有插(cha)入(ru)式(shi)(shi)熔(rong)(rong)(rong)斷(duan)(duan)(duan)器(qi)(qi)(qi)、螺旋式(shi)(shi)熔(rong)(rong)(rong)斷(duan)(duan)(duan)器(qi)(qi)(qi)、封閉(bi)式(shi)(shi)熔(rong)(rong)(rong)斷(duan)(duan)(duan)器(qi)(qi)(qi)、快速熔(rong)(rong)(rong)斷(duan)(duan)(duan)器(qi)(qi)(qi)、自復熔(rong)(rong)(rong)斷(duan)(duan)(duan)器(qi)(qi)(qi)等。

二、熔斷器有什么用

熔(rong)斷(duan)(duan)器俗稱保險(xian)絲，是(shi)配電(dian)(dian)系(xi)統(tong)、控(kong)制系(xi)統(tong)和(he)用(yong)(yong)電(dian)(dian)設備(bei)中常用(yong)(yong)的(de)保護器件(jian)，它的(de)作用(yong)(yong)主要(yao)是(shi)在電(dian)(dian)路發(fa)生故(gu)障或異常時，由于(yu)線(xian)路內電(dian)(dian)流劇增，導線(xian)溫度(du)升(sheng)高，熔(rong)斷(duan)(duan)器會在高溫下自身熔(rong)斷(duan)(duan)，從(cong)而切斷(duan)(duan)電(dian)(dian)流，起到(dao)保護電(dian)(dian)路安(an)全運(yun)行，避免(mian)發(fa)生燒毀電(dian)(dian)路、燒壞元器件(jian)、發(fa)生火災等(deng)事故(gu)的(de)作用(yong)(yong)。

三、熔斷器的型號含義

熔(rong)(rong)斷(duan)(duan)器(qi)(qi)的(de)(de)型號(hao)(hao)一(yi)般是(shi)(shi)有(you)(you)固定規則的(de)(de)，它的(de)(de)型號(hao)(hao)標識由字母和數字組成，第(di)一(yi)位(wei)一(yi)般都是(shi)(shi)R，這是(shi)(shi)熔(rong)(rong)斷(duan)(duan)器(qi)(qi)的(de)(de)代(dai)號(hao)(hao)；第(di)二位(wei)則是(shi)(shi)熔(rong)(rong)斷(duan)(duan)器(qi)(qi)的(de)(de)型式(shi)(shi)(shi)代(dai)號(hao)(hao)，由字母組成，C表(biao)示插入式(shi)(shi)(shi)、L表(biao)示螺旋(xuan)式(shi)(shi)(shi)、M表(biao)示無填(tian)(tian)料(liao)封閉管式(shi)(shi)(shi)、L表(biao)示有(you)(you)填(tian)(tian)料(liao)封閉管式(shi)(shi)(shi)；S表(biao)示快速式(shi)(shi)(shi)；第(di)三(san)位(wei)是(shi)(shi)數字，表(biao)示熔(rong)(rong)斷(duan)(duan)器(qi)(qi)的(de)(de)設計代(dai)號(hao)(hao)；第(di)四位(wei)表(biao)示的(de)(de)是(shi)(shi)熔(rong)(rong)斷(duan)(duan)器(qi)(qi)的(de)(de)額(e)定電流（有(you)(you)的(de)(de)還會標注熔(rong)(rong)體的(de)(de)額(e)定電流）。比如(ru)RL6-25就表(biao)示熔(rong)(rong)斷(duan)(duan)器(qi)(qi)額(e)定電流為25A的(de)(de)螺旋(xuan)式(shi)(shi)(shi)熔(rong)(rong)斷(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(xi)到電路(lu)安全，一(yi)定要選(xuan)擇正規(gui)的產(chan)品(pin)。

五、熔斷器工作原理介紹

熔(rong)斷(duan)器在正常(chang)工(gong)作(zuo)(zuo)情況下(xia)，電(dian)(dian)流從引線(xian)端(duan)(duan)子A進入，由出(chu)線(xian)端(duan)(duan)子B引出(chu)，正常(chang)工(gong)作(zuo)(zuo)，當出(chu)現短(duan)路(lu)故障時，短(duan)路(lu)電(dian)(dian)流通(tong)過熔(rong)斷(duan)器，根據焦耳定律，通(tong)過的電(dian)(dian)流越大，產生(sheng)的熱量也越大，在高溫下(xia)，熔(rong)斷(duan)器內部的熔(rong)體受(shou)熱熔(rong)斷(duan)，從而斷(duan)開(kai)電(dian)(dian)流，起(qi)到保護(hu)電(dian)(dian)路(lu)的作(zuo)(zuo)用。