一、熔斷器是什么東西
熔(rong)(rong)(rong)斷(duan)(duan)(duan)器(qi)(qi)(qi)是(shi)一種電(dian)(dian)路(lu)的(de)安全保(bao)護裝(zhuang)置(zhi),當電(dian)(dian)流(liu)(liu)超(chao)過規定(ding)值時,通過本(ben)身發熱(re)使熔(rong)(rong)(rong)體熔(rong)(rong)(rong)斷(duan)(duan)(duan),從而斷(duan)(duan)(duan)開(kai)電(dian)(dian)路(lu),廣泛應(ying)用(yong)于高(gao)低壓配電(dian)(dian)系(xi)統和控制(zhi)系(xi)統以及(ji)用(yong)電(dian)(dian)設備中(zhong),作為(wei)短(duan)路(lu)和過電(dian)(dian)流(liu)(liu)的(de)保(bao)護器(qi)(qi)(qi),是(shi)應(ying)用(yong)比較普遍的(de)保(bao)護器(qi)(qi)(qi)件之一,具有(you)價格(ge)便宜、體積(ji)小、短(duan)路(lu)分斷(duan)(duan)(duan)能(neng)力較強(qiang)、切斷(duan)(duan)(duan)短(duan)路(lu)更為(wei)安全等諸多(duo)特(te)點(dian)。熔(rong)(rong)(rong)斷(duan)(duan)(duan)器(qi)(qi)(qi)種類眾多(duo),常用(yong)的(de)主(zhu)要有(you)插入式(shi)熔(rong)(rong)(rong)斷(duan)(duan)(duan)器(qi)(qi)(qi)、螺旋式(shi)熔(rong)(rong)(rong)斷(duan)(duan)(duan)器(qi)(qi)(qi)、封閉式(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
熔斷器(qi)(qi)俗稱保(bao)(bao)險(xian)絲,是(shi)配電系統、控(kong)制系統和用電設備中(zhong)常用的保(bao)(bao)護器(qi)(qi)件,它的作用主要(yao)是(shi)在電路(lu)發(fa)生故(gu)障或異常時(shi),由于線路(lu)內電流劇增,導線溫度升高,熔斷器(qi)(qi)會在高溫下自身熔斷,從而(er)切斷電流,起(qi)到保(bao)(bao)護電路(lu)安全運(yun)行,避(bi)免發(fa)生燒毀電路(lu)、燒壞(huai)元器(qi)(qi)件、發(fa)生火(huo)災等事故(gu)的作用。
三、熔斷器的型號含義
熔(rong)斷(duan)器(qi)的(de)(de)(de)型號(hao)一(yi)般(ban)(ban)是(shi)(shi)有(you)固定(ding)規則的(de)(de)(de),它的(de)(de)(de)型號(hao)標識(shi)由(you)字母和數字組(zu)成(cheng),第(di)一(yi)位(wei)一(yi)般(ban)(ban)都是(shi)(shi)R,這是(shi)(shi)熔(rong)斷(duan)器(qi)的(de)(de)(de)代(dai)(dai)號(hao);第(di)二位(wei)則是(shi)(shi)熔(rong)斷(duan)器(qi)的(de)(de)(de)型式(shi)代(dai)(dai)號(hao),由(you)字母組(zu)成(cheng),C表(biao)(biao)(biao)示插入式(shi)、L表(biao)(biao)(biao)示螺旋(xuan)式(shi)、M表(biao)(biao)(biao)示無(wu)填(tian)料(liao)封(feng)閉管式(shi)、L表(biao)(biao)(biao)示有(you)填(tian)料(liao)封(feng)閉管式(shi);S表(biao)(biao)(biao)示快速式(shi);第(di)三位(wei)是(shi)(shi)數字,表(biao)(biao)(biao)示熔(rong)斷(duan)器(qi)的(de)(de)(de)設計代(dai)(dai)號(hao);第(di)四(si)位(wei)表(biao)(biao)(biao)示的(de)(de)(de)是(shi)(shi)熔(rong)斷(duan)器(qi)的(de)(de)(de)額定(ding)電流(有(you)的(de)(de)(de)還會標注熔(rong)體的(de)(de)(de)額定(ding)電流)。比如RL6-25就表(biao)(biao)(biao)示熔(rong)斷(duan)器(qi)額定(ding)電流為25A的(de)(de)(de)螺旋(xuan)式(shi)熔(rong)斷(duan)器(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(lu)安全,一(yi)定(ding)要選擇正規的產品(pin)。
五、熔斷器工作原理介紹
熔(rong)斷(duan)器在正(zheng)常工(gong)作情況下,電(dian)流(liu)從引線端(duan)子(zi)A進入,由出(chu)線端(duan)子(zi)B引出(chu),正(zheng)常工(gong)作,當出(chu)現(xian)短(duan)路(lu)故(gu)障時,短(duan)路(lu)電(dian)流(liu)通(tong)過(guo)熔(rong)斷(duan)器,根據焦(jiao)耳定律,通(tong)過(guo)的電(dian)流(liu)越(yue)大,產(chan)生的熱(re)量也越(yue)大,在高溫下,熔(rong)斷(duan)器內部的熔(rong)體受熱(re)熔(rong)斷(duan),從而斷(duan)開電(dian)流(liu),起(qi)到(dao)保護電(dian)路(lu)的作用。