一、熔斷器型號的字母含義是什么
熔斷器的型號一般是有固定規則的,它的型號標識由字母和數字組成,熔斷器型號含義(yi)可(ke)能(neng)很多朋(peng)友并不是(shi)很了解,下面為大家介(jie)紹一下。
熔(rong)斷(duan)(duan)器(qi)的(de)(de)(de)型號第一位一般都是(shi)(shi)R,這是(shi)(shi)熔(rong)斷(duan)(duan)器(qi)的(de)(de)(de)代(dai)(dai)號;第二(er)位則是(shi)(shi)熔(rong)斷(duan)(duan)器(qi)的(de)(de)(de)型式(shi)代(dai)(dai)號,由字(zi)母組成,C表(biao)示(shi)(shi)(shi)插(cha)入式(shi)、L表(biao)示(shi)(shi)(shi)螺(luo)(luo)旋式(shi)、M表(biao)示(shi)(shi)(shi)無填(tian)料封(feng)閉管式(shi)、L表(biao)示(shi)(shi)(shi)有填(tian)料封(feng)閉管式(shi);S表(biao)示(shi)(shi)(shi)快速式(shi);第三位是(shi)(shi)數字(zi),表(biao)示(shi)(shi)(shi)熔(rong)斷(duan)(duan)器(qi)的(de)(de)(de)設計代(dai)(dai)號;第四(si)位表(biao)示(shi)(shi)(shi)的(de)(de)(de)是(shi)(shi)熔(rong)斷(duan)(duan)器(qi)的(de)(de)(de)額定電流(有的(de)(de)(de)還會(hui)標注熔(rong)體的(de)(de)(de)額定電流)。比如RL6-25就表(biao)示(shi)(shi)(shi)熔(rong)斷(duan)(duan)器(qi)額定電流為(wei)25A的(de)(de)(de)螺(luo)(luo)旋式(shi)熔(rong)斷(duan)(duan)器(qi)。
二、熔斷器的性能參數主要有哪些
熔(rong)斷器的(de)(de)參(can)數直接影響到它的(de)(de)性能好壞,一般常(chang)用(yong)的(de)(de)參(can)數主要有(you):
1、額定電(dian)壓:保證(zheng)熔斷器能(neng)長期正常工作(zuo)的電(dian)壓。
2、額定電流(liu):保證熔(rong)斷器(qi)能長期正常工作的電流(liu)。
3、熔(rong)體的(de)(de)額定電流:是(shi)指在規定的(de)(de)工(gong)作條件下,長時間(jian)通過熔(rong)體而(er)熔(rong)體不(bu)熔(rong)斷時的(de)(de)最大(da)電流值(zhi)。熔(rong)體的(de)(de)額定電流要求不(bu)能大(da)于熔(rong)斷器(qi)的(de)(de)額定電流值(zhi)。
4、極限分(fen)斷(duan)(duan)電(dian)流:是指(zhi)熔斷(duan)(duan)器在額定電(dian)壓下所能斷(duan)(duan)開的最大短路電(dian)流。
5、時間(jian)—電流(liu)(liu)特性:在(zai)規定工作條(tiao)件下,表征流(liu)(liu)過熔(rong)體的(de)電流(liu)(liu)與(yu)熔(rong)體熔(rong)斷時間(jian)關(guan)系(xi)的(de)函數曲線。
三、熔斷器如何選型
熔斷器型號的選(xuan)擇一般包括熔斷器類型選(xuan)擇和(he)熔體額定電流確定兩個方面(mian):
1、熔斷器類型的選擇
在選(xuan)擇(ze)熔(rong)斷(duan)器類型時(shi)(shi),應根據(ju)負(fu)載(zai)的(de)(de)(de)保護(hu)特性和短(duan)路電流大小(xiao)來(lai)選(xuan)擇(ze):比如對于(yu)保護(hu)照明(ming)和電動(dong)機的(de)(de)(de)熔(rong)斷(duan)器,一般只考(kao)慮(lv)(lv)它們的(de)(de)(de)過載(zai)保護(hu),這時(shi)(shi),熔(rong)體的(de)(de)(de)熔(rong)化系數適(shi)當小(xiao)些(xie);而對于(yu)大容量的(de)(de)(de)照明(ming)線路和電動(dong)機,還(huan)需要(yao)考(kao)慮(lv)(lv)短(duan)路時(shi)(shi)分(fen)斷(duan)短(duan)路電流的(de)(de)(de)能力,這時(shi)(shi)則應選(xuan)擇(ze)具(ju)有(you)(you)高分(fen)斷(duan)能力的(de)(de)(de)熔(rong)斷(duan)器,有(you)(you)必要(yao)的(de)(de)(de)話還(huan)要(yao)考(kao)慮(lv)(lv)是否(fou)具(ju)有(you)(you)限(xian)流作(zuo)用。
2、熔體與熔斷器額定電流的確定
熔(rong)體額定(ding)(ding)電(dian)(dian)(dian)(dian)(dian)流(liu)大(da)小(xiao)與負(fu)(fu)載(zai)大(da)小(xiao)、負(fu)(fu)載(zai)性質有關。對于負(fu)(fu)載(zai)平穩、無(wu)沖擊電(dian)(dian)(dian)(dian)(dian)流(liu),如一般(ban)(ban)照明電(dian)(dian)(dian)(dian)(dian)路、電(dian)(dian)(dian)(dian)(dian)熱電(dian)(dian)(dian)(dian)(dian)路可按(an)負(fu)(fu)載(zai)電(dian)(dian)(dian)(dian)(dian)流(liu)大(da)小(xiao)來(lai)確定(ding)(ding)熔(rong)體的(de)(de)額定(ding)(ding)電(dian)(dian)(dian)(dian)(dian)流(liu)。如果是有沖擊電(dian)(dian)(dian)(dian)(dian)流(liu)的(de)(de)電(dian)(dian)(dian)(dian)(dian)動機,熔(rong)斷器的(de)(de)額定(ding)(ding)電(dian)(dian)(dian)(dian)(dian)流(liu)則一般(ban)(ban)為電(dian)(dian)(dian)(dian)(dian)動機額定(ding)(ding)電(dian)(dian)(dian)(dian)(dian)流(liu)的(de)(de)1.5-2.5倍。