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高壓(ya)(ya)(ya)隔(ge)(ge)離(li)(li)開關(guan)保證了(le)高壓(ya)(ya)(ya)電(dian)(dian)(dian)器(qi)及裝置(zhi)在檢修工(gong)(gong)作(zuo)(zuo)時的(de)(de)(de)(de)安(an)全(quan)，起隔(ge)(ge)離(li)(li)電(dian)(dian)(dian)壓(ya)(ya)(ya)的(de)(de)(de)(de)作(zuo)(zuo)用(yong)(yong)(yong)(yong)，不(bu)能(neng)用(yong)(yong)(yong)(yong)與切(qie)(qie)斷(duan)(duan)、投(tou)入負(fu)荷電(dian)(dian)(dian)流和開斷(duan)(duan)短(duan)(duan)路(lu)電(dian)(dian)(dian)流，僅(jin)可(ke)用(yong)(yong)(yong)(yong)于不(bu)產生(sheng)強大電(dian)(dian)(dian)弧(hu)(hu)的(de)(de)(de)(de)某些切(qie)(qie)換(huan)操(cao)作(zuo)(zuo)，即是說(shuo)它不(bu)具有(you)(you)(you)滅弧(hu)(hu)功(gong)能(neng)；按安(an)裝地點不(bu)同分為，屋(wu)內式(shi)和屋(wu)外(wai)式(shi)，按絕緣支柱(zhu)數目分為，單柱(zhu)式(shi)，雙柱(zhu)式(shi)和三(san)柱(zhu)式(shi)，各電(dian)(dian)(dian)壓(ya)(ya)(ya)等級都有(you)(you)(you)可(ke)選設備。還可(ke)將高壓(ya)(ya)(ya)配電(dian)(dian)(dian)裝置(zhi)中需要停電(dian)(dian)(dian)的(de)(de)(de)(de)部分與帶(dai)電(dian)(dian)(dian)部分可(ke)靠地隔(ge)(ge)離(li)(li)，以保證檢修工(gong)(gong)作(zuo)(zuo)的(de)(de)(de)(de)安(an)全(quan)。高壓(ya)(ya)(ya)隔(ge)(ge)離(li)(li)開關(guan)的(de)(de)(de)(de)觸頭全(quan)部敞露在空氣中，具有(you)(you)(you)明顯的(de)(de)(de)(de)斷(duan)(duan)開點，隔(ge)(ge)離(li)(li)開關(guan)沒有(you)(you)(you)滅弧(hu)(hu)裝置(zhi)，因此不(bu)能(neng)用(yong)(yong)(yong)(yong)來切(qie)(qie)斷(duan)(duan)負(fu)荷電(dian)(dian)(dian)流或(huo)短(duan)(duan)路(lu)電(dian)(dian)(dian)流，否則在高壓(ya)(ya)(ya)作(zuo)(zuo)用(yong)(yong)(yong)(yong)下，斷(duan)(duan)開點將產生(sheng)強烈電(dian)(dian)(dian)弧(hu)(hu)，并很難自(zi)行(xing)熄滅，甚至可(ke)能(neng)造(zao)成飛弧(hu)(hu)（相對地或(huo)相間短(duan)(duan)路(lu)），燒損設備，危及人(ren)身安(an)全(quan)，這(zhe)就(jiu)是所謂“帶(dai)負(fu)荷拉(la)隔(ge)(ge)離(li)(li)開關(guan)”的(de)(de)(de)(de)嚴(yan)重(zhong)事故。

高壓隔離(li)開關還可(ke)以用來(lai)進行某些電(dian)路(lu)的(de)切換(huan)操作(zuo)，以改(gai)變系統(tong)的(de)運(yun)行方式。例如(ru)：在雙母(mu)線(xian)電(dian)路(lu)中，可(ke)以用高壓隔離(li)開關將運(yun)行中的(de)電(dian)路(lu)從一條母(mu)線(xian)切換(huan)到另一條母(mu)線(xian)上。