一、熔斷器是什么東西
熔斷(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)是(shi)一種電(dian)(dian)(dian)路(lu)的(de)(de)安(an)全保護(hu)裝置,當電(dian)(dian)(dian)流超(chao)過(guo)規定值(zhi)時,通過(guo)本(ben)身發熱使(shi)熔體熔斷(duan)(duan)(duan)(duan)(duan),從而斷(duan)(duan)(duan)(duan)(duan)開(kai)電(dian)(dian)(dian)路(lu),廣泛(fan)應(ying)用(yong)(yong)于高低壓配電(dian)(dian)(dian)系統(tong)和控(kong)制系統(tong)以(yi)及用(yong)(yong)電(dian)(dian)(dian)設(she)備中,作(zuo)為短路(lu)和過(guo)電(dian)(dian)(dian)流的(de)(de)保護(hu)器(qi)(qi)(qi)(qi),是(shi)應(ying)用(yong)(yong)比較普遍的(de)(de)保護(hu)器(qi)(qi)(qi)(qi)件之一,具(ju)有(you)價格便宜、體積小、短路(lu)分斷(duan)(duan)(duan)(duan)(duan)能力(li)較強、切(qie)斷(duan)(duan)(duan)(duan)(duan)短路(lu)更為安(an)全等(deng)(deng)諸多特點(dian)。熔斷(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)種類(lei)眾多,常(chang)用(yong)(yong)的(de)(de)主要(yao)有(you)插入式熔斷(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)、螺旋式熔斷(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)、封閉式熔斷(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)、快(kuai)速熔斷(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)、自復熔斷(duan)(duan)(duan)(duan)(duan)器(qi)(qi)(qi)(qi)等(deng)(deng)。
二、熔斷器有什么用
熔斷器俗稱保險絲(si),是配電(dian)系(xi)統、控制系(xi)統和用(yong)(yong)電(dian)設備中常用(yong)(yong)的(de)保護器件,它的(de)作(zuo)用(yong)(yong)主要(yao)是在電(dian)路(lu)發生故(gu)障或異常時,由于線(xian)路(lu)內(nei)電(dian)流劇增,導線(xian)溫度升高,熔斷器會在高溫下(xia)自身熔斷,從(cong)而切斷電(dian)流,起到(dao)保護電(dian)路(lu)安全運行,避(bi)免發生燒毀電(dian)路(lu)、燒壞(huai)元器件、發生火災等事故(gu)的(de)作(zuo)用(yong)(yong)。
三、熔斷器的型號含義
熔(rong)斷(duan)(duan)器(qi)的(de)型(xing)號(hao)(hao)一般是(shi)(shi)(shi)有固定規則的(de),它(ta)的(de)型(xing)號(hao)(hao)標識(shi)由(you)字(zi)母(mu)和數字(zi)組成(cheng),第一位一般都(dou)是(shi)(shi)(shi)R,這是(shi)(shi)(shi)熔(rong)斷(duan)(duan)器(qi)的(de)代號(hao)(hao);第二(er)位則是(shi)(shi)(shi)熔(rong)斷(duan)(duan)器(qi)的(de)型(xing)式(shi)代號(hao)(hao),由(you)字(zi)母(mu)組成(cheng),C表示(shi)(shi)插(cha)入式(shi)、L表示(shi)(shi)螺旋式(shi)、M表示(shi)(shi)無填(tian)(tian)料封閉管(guan)式(shi)、L表示(shi)(shi)有填(tian)(tian)料封閉管(guan)式(shi);S表示(shi)(shi)快速式(shi);第三位是(shi)(shi)(shi)數字(zi),表示(shi)(shi)熔(rong)斷(duan)(duan)器(qi)的(de)設計(ji)代號(hao)(hao);第四(si)位表示(shi)(shi)的(de)是(shi)(shi)(shi)熔(rong)斷(duan)(duan)器(qi)的(de)額定電(dian)流(有的(de)還會標注熔(rong)體(ti)的(de)額定電(dian)流)。比如RL6-25就表示(shi)(shi)熔(rong)斷(duan)(duan)器(qi)額定電(dian)流為25A的(de)螺旋式(shi)熔(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(bi)竟關系到電路(lu)安全,一定要選擇正規的產品。
五、熔斷器工作原理介紹
熔(rong)斷(duan)(duan)(duan)(duan)器(qi)在(zai)正常工作情(qing)況下,電(dian)流從(cong)引線端(duan)子A進入,由出(chu)線端(duan)子B引出(chu),正常工作,當出(chu)現短路(lu)故障時,短路(lu)電(dian)流通(tong)過熔(rong)斷(duan)(duan)(duan)(duan)器(qi),根據焦耳(er)定(ding)律(lv),通(tong)過的電(dian)流越大,產生(sheng)的熱量(liang)也越大,在(zai)高溫下,熔(rong)斷(duan)(duan)(duan)(duan)器(qi)內部的熔(rong)體受熱熔(rong)斷(duan)(duan)(duan)(duan),從(cong)而(er)斷(duan)(duan)(duan)(duan)開電(dian)流,起到(dao)保護電(dian)路(lu)的作用。