闡述保護(hu)用(yong)(yong)電(dian)(dian)(dian)(dian)流(liu)(liu)互(hu)感器（TA）主要與繼電(dian)(dian)(dian)(dian)保護(hu)裝(zhuang)置配合使(shi)用(yong)(yong)。如果(guo)發(fa)生短(duan)路或線路過載，它會(hui)向(xiang)繼電(dian)(dian)(dian)(dian)器設備發(fa)出信號，以(yi)切(qie)斷(duan)故障電(dian)(dian)(dian)(dian)路，以(yi)保護(hu)電(dian)(dian)(dian)(dian)源系(xi)統的(de)安全。工(gong)(gong)作(zuo)(zuo)條件(jian)與換能(neng)器根本(ben)不同(tong)。傳(chuan)感器的(de)正(zheng)常初級電(dian)(dian)(dian)(dian)流(liu)(liu)工(gong)(gong)作(zuo)(zuo)范圍相(xiang)當準確。如果(guo)故障短(duan)路電(dian)(dian)(dian)(dian)流(liu)(liu)通(tong)過，則變壓器應盡快飽和，以(yi)保護(hu)儀(yi)表不受短(duan)路電(dian)(dian)(dian)(dian)流(liu)(liu)的(de)損害。前者僅在(zai)電(dian)(dian)(dian)(dian)流(liu)(liu)大于正(zheng)常電(dian)(dian)(dian)(dian)流(liu)(liu)幾倍或十倍并且其誤差(cha)(cha)(cha)（電(dian)(dian)(dian)(dian)流(liu)(liu)和相(xiang)位(wei)(wei)誤差(cha)(cha)(cha)）必須(xu)在(zai)誤差(cha)(cha)(cha)曲線范圍內時(shi)才開始工(gong)(gong)作(zuo)(zuo)。當同(tong)時(shi)評估(gu)電(dian)(dian)(dian)(dian)流(liu)(liu)誤差(cha)(cha)(cha)和相(xiang)位(wei)(wei)差(cha)(cha)(cha)時(shi)，將(jiang)使(shi)用(yong)(yong)復(fu)合誤差(cha)(cha)(cha)。

高壓柜的保護模式包括通過保險絲或繼電器保護（動作）關閉或報警電氣開關。如果保險絲燒斷，則斷路器跳閘的保護方法是機械跳閘保護。繼電保護是一種由各種繼電器組成的保護電路，當使用信號繼電器發出信號（或聲光信號）以完成警報時，會使繼電器跳閘。斷路器本身沒有保護功能，只能起到中斷電流和電弧的作用。高壓柜主要由斷路器，保護裝置和電路組成。高壓柜的保護由保護繼電器完成（常規保護方法或綜合保護方法）。生產廠(chang)家一(yi)開始(shi)的(de)保(bao)護(hu)是多個(ge)繼電器(qi)具有不(bu)同的(de)功(gong)能。然后，不(bu)同的(de)繼電器(qi)在電路中發揮各(ge)自(zi)的(de)保(bao)護(hu)功(gong)能。

負荷開(kai)(kai)關(guan)(guan)：負荷開(kai)(kai)關(guan)(guan)具有(you)簡(jian)單(dan)的(de)滅弧裝置。滅弧介質(zhi)通常(chang)是(shi)空(kong)氣，它可(ke)以產生并中斷(duan)(duan)(duan)(duan)某些電(dian)(dian)(dian)流和過電(dian)(dian)(dian)流，但不(bu)(bu)能中斷(duan)(duan)(duan)(duan)短路(lu)(lu)(lu)(lu)電(dian)(dian)(dian)流，也不(bu)(bu)能用(yong)(yong)(yong)于消除短路(lu)(lu)(lu)(lu)故障。因此，不(bu)(bu)允許簡(jian)單(dan)地(di)使(shi)用(yong)(yong)(yong)負載(zai)開(kai)(kai)關(guan)(guan)來替代斷(duan)(duan)(duan)(duan)路(lu)(lu)(lu)(lu)器(qi)(qi)。如果要使(shi)用(yong)(yong)(yong)斷(duan)(duan)(duan)(duan)路(lu)(lu)(lu)(lu)器(qi)(qi)，則必(bi)須將它們與上(shang)述高壓熔斷(duan)(duan)(duan)(duan)器(qi)(qi)結合使(shi)用(yong)(yong)(yong)（實際上(shang)，斷(duan)(duan)(duan)(duan)路(lu)(lu)(lu)(lu)器(qi)(qi)和斷(duan)(duan)(duan)(duan)路(lu)(lu)(lu)(lu)器(qi)(qi)通常(chang)串聯使(shi)用(yong)(yong)(yong)，以提供簡(jian)單(dan)的(de)過載(zai)保(bao)護。以降低項(xiang)目(mu)成(cheng)本）。負載(zai)開(kai)(kai)關(guan)(guan)類似(si)于隔(ge)離(li)刀，并且有(you)明(ming)顯的(de)隔(ge)離(li)間隙，很(hen)容(rong)易判斷(duan)(duan)(duan)(duan)電(dian)(dian)(dian)路(lu)(lu)(lu)(lu)是(shi)打(da)開(kai)(kai)還(huan)是(shi)關(guan)(guan)閉。