接地線根據工作要求可分為哪些
system · 瀏覽 241 · 點贊 0 · 評論 0 · 1年前 (2023-07-06)
地線是接地裝置的簡稱。接地線從外形(xing)上(shang)(shang)可分(fen)為接(jie)(jie)(jie)地(di)(di)(di)(di)圓線(xian)、接(jie)(jie)(jie)地(di)(di)(di)(di)扁線(xian)、接(jie)(jie)(jie)地(di)(di)(di)(di)絞線(xian)等等,材質上(shang)(shang)又有(you)鋅(xin)包鋼(gang)、銅包鋼(gang)、純銅等分(fen)類(lei)。而(er)在(zai)使(shi)用(yong)上(shang)(shang)接(jie)(jie)(jie)地(di)(di)(di)(di)線(xian)又分(fen)為工作接(jie)(jie)(jie)地(di)(di)(di)(di)和安(an)全性接(jie)(jie)(jie)地(di)(di)(di)(di)。為防止人們在(zai)使(shi)用(yong)家(jia)電(dian)及(ji)辦公等電(dian)子設備(bei)時發生觸電(dian)事故而(er)采取的(de)保護接(jie)(jie)(jie)地(di)(di)(di)(di),就是一種安(an)全性接(jie)(jie)(jie)地(di)(di)(di)(di)護線(xian)。安(an)全性接(jie)(jie)(jie)地(di)(di)(di)(di)一般包括是防雷(lei)擊接(jie)(jie)(jie)地(di)(di)(di)(di)和防電(dian)磁輻(fu)射接(jie)(jie)(jie)地(di)(di)(di)(di)。對(dui)此電(dian)器(qi)就從使(shi)用(yong)上(shang)(shang)來為大家(jia)詳細介紹一下(xia)關于接(jie)(jie)(jie)地(di)(di)(di)(di)線(xian)的(de)分(fen)類(lei)。
一、工作接地
工作接地(di)(di)是把金屬導體銅(tong)塊埋在土壤里,再把它(ta)的(de)一點用(yong)導線(xian)引出地(di)(di)面,用(yong)它(ta)完成回路使(shi)設備達到(dao)性能(neng)要求(qiu)的(de)接地(di)(di)線(xian)。地(di)(di)線(xian)要求(qiu)接地(di)(di)電阻≤4Ω。如六(liu)七十年代農村(cun)家家戶(hu)戶(hu)使(shi)用(yong)的(de)廣播有一根地(di)(di)線(xian),并且在接地(di)(di)處要經常(chang)用(yong)水淋濕。
二、安全性接地線
用電(dian)(dian)規(gui)程規(gui)定保護(hu)接(jie)地(di)電(dian)(dian)阻(zu)應(ying)≤4Ω,而(er)人(ren)體的電(dian)(dian)阻(zu)一(yi)般(ban)大于2000Ω,根據歐姆定律(lv),絕(jue)緣損(sun)壞時通過人(ren)體的電(dian)(dian)流(liu)僅(jin)為總電(dian)(dian)流(liu)的1/500,進而(er)起到保護(hu)作用。家(jia)用電(dian)(dian)器和辦公設(she)備(bei)的金屬外(wai)(wai)殼都設(she)有(you)接(jie)地(di)線(xian),如(ru)其絕(jue)緣損(sun)壞外(wai)(wai)殼帶電(dian)(dian),則電(dian)(dian)流(liu)沿(yan)著安(an)裝的接(jie)地(di)線(xian)泄(xie)入大地(di),以達到安(an)全的目的,否則會給(gei)人(ren)身安(an)全造(zao)成危害。
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