芒果视频

一、熔斷器是什么東西

熔(rong)斷(duan)(duan)(duan)(duan)器(qi)(qi)(qi)是一種(zhong)電路的(de)安全保(bao)護裝置，當(dang)電流超過規定值時，通過本身發熱(re)使熔(rong)體(ti)熔(rong)斷(duan)(duan)(duan)(duan)，從而斷(duan)(duan)(duan)(duan)開(kai)電路，廣泛應(ying)用于高低壓配(pei)電系統和(he)控(kong)制系統以及用電設(she)備(bei)中，作為(wei)短(duan)路和(he)過電流的(de)保(bao)護器(qi)(qi)(qi)，是應(ying)用比較普遍的(de)保(bao)護器(qi)(qi)(qi)件(jian)之一，具(ju)有價格便宜、體(ti)積小、短(duan)路分(fen)斷(duan)(duan)(duan)(duan)能力較強、切斷(duan)(duan)(duan)(duan)短(duan)路更(geng)為(wei)安全等(deng)諸多特點。熔(rong)斷(duan)(duan)(duan)(duan)器(qi)(qi)(qi)種(zhong)類(lei)眾多，常用的(de)主(zhu)要有插入式(shi)(shi)熔(rong)斷(duan)(duan)(duan)(duan)器(qi)(qi)(qi)、螺(luo)旋式(shi)(shi)熔(rong)斷(duan)(duan)(duan)(duan)器(qi)(qi)(qi)、封閉式(shi)(shi)熔(rong)斷(duan)(duan)(duan)(duan)器(qi)(qi)(qi)、快速熔(rong)斷(duan)(duan)(duan)(duan)器(qi)(qi)(qi)、自復(fu)熔(rong)斷(duan)(duan)(duan)(duan)器(qi)(qi)(qi)等(deng)。

二、熔斷器有什么用

熔(rong)斷(duan)(duan)器俗稱保險絲，是配(pei)電(dian)(dian)系(xi)統、控制(zhi)系(xi)統和用(yong)(yong)電(dian)(dian)設(she)備中常用(yong)(yong)的保護(hu)器件，它的作用(yong)(yong)主要(yao)是在(zai)電(dian)(dian)路發(fa)生故障或異常時，由于(yu)線(xian)路內電(dian)(dian)流劇增，導線(xian)溫度升高，熔(rong)斷(duan)(duan)器會在(zai)高溫下自身(shen)熔(rong)斷(duan)(duan)，從而(er)切斷(duan)(duan)電(dian)(dian)流，起到保護(hu)電(dian)(dian)路安(an)全運行，避免發(fa)生燒毀(hui)電(dian)(dian)路、燒壞元器件、發(fa)生火災等事故的作用(yong)(yong)。

三、熔斷器的型號含義

熔(rong)(rong)(rong)斷(duan)(duan)器(qi)(qi)(qi)的(de)(de)(de)型(xing)號一般是(shi)有固(gu)定(ding)規(gui)則(ze)的(de)(de)(de)，它的(de)(de)(de)型(xing)號標識由(you)(you)字(zi)(zi)母(mu)和數(shu)字(zi)(zi)組成，第(di)一位(wei)一般都(dou)是(shi)R，這是(shi)熔(rong)(rong)(rong)斷(duan)(duan)器(qi)(qi)(qi)的(de)(de)(de)代號；第(di)二(er)位(wei)則(ze)是(shi)熔(rong)(rong)(rong)斷(duan)(duan)器(qi)(qi)(qi)的(de)(de)(de)型(xing)式(shi)代號，由(you)(you)字(zi)(zi)母(mu)組成，C表(biao)(biao)示(shi)插入式(shi)、L表(biao)(biao)示(shi)螺旋式(shi)、M表(biao)(biao)示(shi)無填(tian)料封閉管(guan)式(shi)、L表(biao)(biao)示(shi)有填(tian)料封閉管(guan)式(shi)；S表(biao)(biao)示(shi)快速式(shi)；第(di)三位(wei)是(shi)數(shu)字(zi)(zi)，表(biao)(biao)示(shi)熔(rong)(rong)(rong)斷(duan)(duan)器(qi)(qi)(qi)的(de)(de)(de)設計代號；第(di)四(si)位(wei)表(biao)(biao)示(shi)的(de)(de)(de)是(shi)熔(rong)(rong)(rong)斷(duan)(duan)器(qi)(qi)(qi)的(de)(de)(de)額定(ding)電(dian)流（有的(de)(de)(de)還會標注熔(rong)(rong)(rong)體的(de)(de)(de)額定(ding)電(dian)流）。比如(ru)RL6-25就表(biao)(biao)示(shi)熔(rong)(rong)(rong)斷(duan)(duan)器(qi)(qi)(qi)額定(ding)電(dian)流為25A的(de)(de)(de)螺旋式(shi)熔(rong)(rong)(rong)斷(duan)(duan)器(qi)(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(bi)竟關(guan)系到電路(lu)安全(quan)，一定(ding)要選(xuan)擇正(zheng)規的產品。

五、熔斷器工作原理介紹

熔(rong)斷(duan)器在(zai)正常(chang)(chang)工作情況下，電(dian)(dian)流(liu)從(cong)引線端子A進入，由出(chu)線端子B引出(chu)，正常(chang)(chang)工作，當出(chu)現(xian)短路故(gu)障時，短路電(dian)(dian)流(liu)通過(guo)熔(rong)斷(duan)器，根據焦耳定律，通過(guo)的(de)電(dian)(dian)流(liu)越大，產生的(de)熱量也(ye)越大，在(zai)高溫(wen)下，熔(rong)斷(duan)器內部的(de)熔(rong)體受熱熔(rong)斷(duan)，從(cong)而斷(duan)開電(dian)(dian)流(liu)，起到(dao)保護(hu)電(dian)(dian)路的(de)作用。