高壓隔離開關的工作機理發布時間:2022/5/18 14:35:02 瀏覽次數:3258
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高壓(ya)隔(ge)離(li)開(kai)關(guan)(guan)(guan)保證了高壓(ya)電(dian)(dian)(dian)(dian)器及(ji)裝(zhuang)置在(zai)檢修工(gong)作(zuo)時的(de)(de)(de)安(an)(an)(an)全(quan),起(qi)隔(ge)離(li)電(dian)(dian)(dian)(dian)壓(ya)的(de)(de)(de)作(zuo)用(yong),不(bu)能(neng)用(yong)與切斷(duan)、投入負荷電(dian)(dian)(dian)(dian)流(liu)和(he)開(kai)斷(duan)短路(lu)電(dian)(dian)(dian)(dian)流(liu),僅可(ke)用(yong)于不(bu)產(chan)生強大(da)電(dian)(dian)(dian)(dian)弧(hu)的(de)(de)(de)某些切換操作(zuo),即是說它不(bu)具有滅弧(hu)功能(neng);按安(an)(an)(an)裝(zhuang)地(di)點不(bu)同分為,屋內(nei)式和(he)屋外式,按絕緣支柱(zhu)數目分為,單柱(zhu)式,雙柱(zhu)式和(he)三柱(zhu)式,各(ge)電(dian)(dian)(dian)(dian)壓(ya)等(deng)級(ji)都有可(ke)選設備(bei)(bei)。還可(ke)將高壓(ya)配電(dian)(dian)(dian)(dian)裝(zhuang)置中(zhong)需要停電(dian)(dian)(dian)(dian)的(de)(de)(de)部(bu)分與帶(dai)電(dian)(dian)(dian)(dian)部(bu)分可(ke)靠地(di)隔(ge)離(li),以保證檢修工(gong)作(zuo)的(de)(de)(de)安(an)(an)(an)全(quan)。高壓(ya)隔(ge)離(li)開(kai)關(guan)(guan)(guan)的(de)(de)(de)觸頭全(quan)部(bu)敞露在(zai)空氣中(zhong),具有明顯的(de)(de)(de)斷(duan)開(kai)點,隔(ge)離(li)開(kai)關(guan)(guan)(guan)沒有滅弧(hu)裝(zhuang)置,因此(ci)不(bu)能(neng)用(yong)來(lai)切斷(duan)負荷電(dian)(dian)(dian)(dian)流(liu)或短路(lu)電(dian)(dian)(dian)(dian)流(liu),否則在(zai)高壓(ya)作(zuo)用(yong)下,斷(duan)開(kai)點將產(chan)生強烈電(dian)(dian)(dian)(dian)弧(hu),并很難自行熄(xi)滅,甚至可(ke)能(neng)造(zao)成飛弧(hu)(相(xiang)對地(di)或相(xiang)間短路(lu)),燒損設備(bei)(bei),危及(ji)人(ren)身安(an)(an)(an)全(quan),這就是所謂“帶(dai)負荷拉隔(ge)離(li)開(kai)關(guan)(guan)(guan)”的(de)(de)(de)嚴重事故。 高壓(ya)隔離(li)開關還可以(yi)用(yong)來進(jin)行(xing)某些(xie)電路的(de)切(qie)換(huan)(huan)操作(zuo),以(yi)改變系統的(de)運行(xing)方(fang)式。例如:在雙母線(xian)電路中,可以(yi)用(yong)高壓(ya)隔離(li)開關將運行(xing)中的(de)電路從(cong)一條(tiao)(tiao)母線(xian)切(qie)換(huan)(huan)到另一條(tiao)(tiao)母線(xian)上。 |
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