一、熔斷器是什么東西
熔(rong)斷(duan)(duan)(duan)器(qi)(qi)是一(yi)種電(dian)(dian)(dian)路的安全(quan)保(bao)護裝置,當(dang)電(dian)(dian)(dian)流(liu)超(chao)過規定值時,通過本身發熱使熔(rong)體(ti)熔(rong)斷(duan)(duan)(duan),從而斷(duan)(duan)(duan)開電(dian)(dian)(dian)路,廣(guang)泛應用于高低(di)壓配電(dian)(dian)(dian)系(xi)統和控制(zhi)系(xi)統以及用電(dian)(dian)(dian)設(she)備中(zhong),作為(wei)短(duan)路和過電(dian)(dian)(dian)流(liu)的保(bao)護器(qi)(qi),是應用比(bi)較普(pu)遍的保(bao)護器(qi)(qi)件之(zhi)一(yi),具有價格便宜(yi)、體(ti)積(ji)小、短(duan)路分斷(duan)(duan)(duan)能(neng)力(li)較強、切斷(duan)(duan)(duan)短(duan)路更(geng)為(wei)安全(quan)等諸多特點。熔(rong)斷(duan)(duan)(duan)器(qi)(qi)種類眾多,常用的主要有插(cha)入式熔(rong)斷(duan)(duan)(duan)器(qi)(qi)、螺旋式熔(rong)斷(duan)(duan)(duan)器(qi)(qi)、封閉式熔(rong)斷(duan)(duan)(duan)器(qi)(qi)、快速熔(rong)斷(duan)(duan)(duan)器(qi)(qi)、自復熔(rong)斷(duan)(duan)(duan)器(qi)(qi)等。
二、熔斷器有什么用
熔(rong)斷(duan)器(qi)俗稱保(bao)險絲(si),是配(pei)電(dian)系統、控制系統和用電(dian)設備中常(chang)用的保(bao)護器(qi)件(jian),它(ta)的作用主要是在(zai)(zai)電(dian)路發生故障或異常(chang)時(shi),由于(yu)線路內電(dian)流(liu)劇增(zeng),導線溫度升高(gao),熔(rong)斷(duan)器(qi)會在(zai)(zai)高(gao)溫下自身熔(rong)斷(duan),從而(er)切(qie)斷(duan)電(dian)流(liu),起(qi)到保(bao)護電(dian)路安全運行,避免發生燒毀電(dian)路、燒壞元(yuan)器(qi)件(jian)、發生火災等事故的作用。
三、熔斷器的型號含義
熔(rong)(rong)斷(duan)(duan)器(qi)的(de)(de)(de)(de)型(xing)(xing)號(hao)一般是(shi)有固(gu)定規則(ze)的(de)(de)(de)(de),它的(de)(de)(de)(de)型(xing)(xing)號(hao)標識由字母(mu)和數字組成(cheng),第(di)(di)一位一般都是(shi)R,這是(shi)熔(rong)(rong)斷(duan)(duan)器(qi)的(de)(de)(de)(de)代(dai)號(hao);第(di)(di)二位則(ze)是(shi)熔(rong)(rong)斷(duan)(duan)器(qi)的(de)(de)(de)(de)型(xing)(xing)式(shi)代(dai)號(hao),由字母(mu)組成(cheng),C表(biao)(biao)(biao)(biao)(biao)示(shi)(shi)(shi)(shi)插入式(shi)、L表(biao)(biao)(biao)(biao)(biao)示(shi)(shi)(shi)(shi)螺旋(xuan)式(shi)、M表(biao)(biao)(biao)(biao)(biao)示(shi)(shi)(shi)(shi)無填料封(feng)閉管(guan)式(shi)、L表(biao)(biao)(biao)(biao)(biao)示(shi)(shi)(shi)(shi)有填料封(feng)閉管(guan)式(shi);S表(biao)(biao)(biao)(biao)(biao)示(shi)(shi)(shi)(shi)快速式(shi);第(di)(di)三位是(shi)數字,表(biao)(biao)(biao)(biao)(biao)示(shi)(shi)(shi)(shi)熔(rong)(rong)斷(duan)(duan)器(qi)的(de)(de)(de)(de)設計代(dai)號(hao);第(di)(di)四位表(biao)(biao)(biao)(biao)(biao)示(shi)(shi)(shi)(shi)的(de)(de)(de)(de)是(shi)熔(rong)(rong)斷(duan)(duan)器(qi)的(de)(de)(de)(de)額(e)定電(dian)流(有的(de)(de)(de)(de)還會標注熔(rong)(rong)體(ti)的(de)(de)(de)(de)額(e)定電(dian)流)。比如RL6-25就表(biao)(biao)(biao)(biao)(biao)示(shi)(shi)(shi)(shi)熔(rong)(rong)斷(duan)(duan)器(qi)額(e)定電(dian)流為25A的(de)(de)(de)(de)螺旋(xuan)式(shi)熔(rong)(rong)斷(duan)(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(dian)路安全,一定要選擇正規的產品。
五、熔斷器工作原理介紹
熔斷器在正常(chang)工作情(qing)況下(xia),電(dian)(dian)流(liu)從引線(xian)端子A進入,由出線(xian)端子B引出,正常(chang)工作,當出現短路故(gu)障時,短路電(dian)(dian)流(liu)通(tong)過(guo)熔斷器,根(gen)據焦耳定(ding)律,通(tong)過(guo)的(de)電(dian)(dian)流(liu)越(yue)大(da),產生的(de)熱量也(ye)越(yue)大(da),在高溫下(xia),熔斷器內部的(de)熔體受熱熔斷,從而斷開電(dian)(dian)流(liu),起到保(bao)護電(dian)(dian)路的(de)作用。