一、熔斷器是什么東西
熔(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)器(qi)(qi)是(shi)一種電(dian)路(lu)(lu)的(de)安全(quan)保護(hu)裝置,當電(dian)流超(chao)過規定值時(shi),通過本身發熱使熔(rong)(rong)(rong)體熔(rong)(rong)(rong)斷(duan)(duan)(duan)(duan),從而斷(duan)(duan)(duan)(duan)開電(dian)路(lu)(lu),廣泛(fan)應(ying)用于高低壓配電(dian)系統(tong)和(he)(he)控制系統(tong)以及用電(dian)設備中,作為短(duan)路(lu)(lu)和(he)(he)過電(dian)流的(de)保護(hu)器(qi)(qi),是(shi)應(ying)用比(bi)較(jiao)普遍(bian)的(de)保護(hu)器(qi)(qi)件之(zhi)一,具(ju)有(you)價格便宜(yi)、體積小(xiao)、短(duan)路(lu)(lu)分(fen)斷(duan)(duan)(duan)(duan)能(neng)力較(jiao)強、切斷(duan)(duan)(duan)(duan)短(duan)路(lu)(lu)更為安全(quan)等(deng)諸(zhu)多特點。熔(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)器(qi)(qi)種類眾多,常用的(de)主要有(you)插入式(shi)(shi)熔(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)器(qi)(qi)、螺旋式(shi)(shi)熔(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)器(qi)(qi)、封閉式(shi)(shi)熔(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)器(qi)(qi)、快速熔(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)器(qi)(qi)、自復熔(rong)(rong)(rong)斷(duan)(duan)(duan)(duan)器(qi)(qi)等(deng)。
二、熔斷器有什么用
熔斷器(qi)俗稱(cheng)保險絲(si),是配電(dian)系統(tong)、控(kong)制系統(tong)和用(yong)(yong)電(dian)設備中常用(yong)(yong)的保護(hu)器(qi)件,它的作(zuo)用(yong)(yong)主(zhu)要(yao)是在電(dian)路發生(sheng)故障或(huo)異常時,由(you)于線(xian)路內電(dian)流劇增,導線(xian)溫度升高(gao),熔斷器(qi)會在高(gao)溫下自(zi)身(shen)熔斷,從而切斷電(dian)流,起到保護(hu)電(dian)路安全(quan)運行,避免(mian)發生(sheng)燒毀電(dian)路、燒壞元器(qi)件、發生(sheng)火災(zai)等事(shi)故的作(zuo)用(yong)(yong)。
三、熔斷器的型號含義
熔斷(duan)(duan)器(qi)的型號(hao)一般(ban)是(shi)有(you)固定(ding)規則的,它的型號(hao)標(biao)識由字(zi)(zi)母和數(shu)字(zi)(zi)組(zu)成,第一位一般(ban)都是(shi)R,這是(shi)熔斷(duan)(duan)器(qi)的代(dai)號(hao);第二(er)位則是(shi)熔斷(duan)(duan)器(qi)的型式(shi)代(dai)號(hao),由字(zi)(zi)母組(zu)成,C表(biao)(biao)示(shi)插入式(shi)、L表(biao)(biao)示(shi)螺(luo)旋式(shi)、M表(biao)(biao)示(shi)無填料封(feng)閉(bi)管式(shi)、L表(biao)(biao)示(shi)有(you)填料封(feng)閉(bi)管式(shi);S表(biao)(biao)示(shi)快速式(shi);第三位是(shi)數(shu)字(zi)(zi),表(biao)(biao)示(shi)熔斷(duan)(duan)器(qi)的設計代(dai)號(hao);第四位表(biao)(biao)示(shi)的是(shi)熔斷(duan)(duan)器(qi)的額(e)定(ding)電(dian)流(有(you)的還會標(biao)注熔體的額(e)定(ding)電(dian)流)。比如RL6-25就表(biao)(biao)示(shi)熔斷(duan)(duan)器(qi)額(e)定(ding)電(dian)流為25A的螺(luo)旋式(shi)熔斷(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(jing)關系到電路安全,一(yi)定要選擇正規的產品。
五、熔斷器工作原理介紹
熔(rong)斷(duan)器(qi)在(zai)正(zheng)常(chang)工(gong)(gong)作情況下,電(dian)流(liu)(liu)從(cong)(cong)引線端子A進入(ru),由出線端子B引出,正(zheng)常(chang)工(gong)(gong)作,當出現短路(lu)故障時,短路(lu)電(dian)流(liu)(liu)通過熔(rong)斷(duan)器(qi),根(gen)據焦耳定律,通過的(de)電(dian)流(liu)(liu)越(yue)大,產生的(de)熱(re)量也越(yue)大,在(zai)高溫下,熔(rong)斷(duan)器(qi)內部的(de)熔(rong)體受熱(re)熔(rong)斷(duan),從(cong)(cong)而斷(duan)開電(dian)流(liu)(liu),起到保(bao)護電(dian)路(lu)的(de)作用。