闡述保(bao)護(hu)用(yong)電(dian)(dian)(dian)(dian)(dian)流(liu)互感器(qi)（TA）主要與繼(ji)電(dian)(dian)(dian)(dian)(dian)保(bao)護(hu)裝置配合使(shi)用(yong)。如果(guo)(guo)發生短(duan)路或線(xian)路過載，它會向繼(ji)電(dian)(dian)(dian)(dian)(dian)器(qi)設備(bei)發出(chu)信號，以(yi)(yi)切斷故障電(dian)(dian)(dian)(dian)(dian)路，以(yi)(yi)保(bao)護(hu)電(dian)(dian)(dian)(dian)(dian)源系(xi)統(tong)的安全。工作(zuo)條件與換能器(qi)根本不(bu)同。傳感器(qi)的正(zheng)常(chang)初級電(dian)(dian)(dian)(dian)(dian)流(liu)工作(zuo)范圍(wei)相(xiang)(xiang)當準確。如果(guo)(guo)故障短(duan)路電(dian)(dian)(dian)(dian)(dian)流(liu)通過，則變壓器(qi)應(ying)盡(jin)快飽(bao)和(he)，以(yi)(yi)保(bao)護(hu)儀表不(bu)受短(duan)路電(dian)(dian)(dian)(dian)(dian)流(liu)的損害。前者僅(jin)在電(dian)(dian)(dian)(dian)(dian)流(liu)大于正(zheng)常(chang)電(dian)(dian)(dian)(dian)(dian)流(liu)幾倍或十倍并(bing)且其誤(wu)(wu)差(cha)（電(dian)(dian)(dian)(dian)(dian)流(liu)和(he)相(xiang)(xiang)位誤(wu)(wu)差(cha)）必須(xu)在誤(wu)(wu)差(cha)曲線(xian)范圍(wei)內時才開始工作(zuo)。當同時評估(gu)電(dian)(dian)(dian)(dian)(dian)流(liu)誤(wu)(wu)差(cha)和(he)相(xiang)(xiang)位差(cha)時，將使(shi)用(yong)復合誤(wu)(wu)差(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)開始的(de)保護是多個繼電(dian)器具(ju)有不同的(de)功(gong)能(neng)。然(ran)后，不同的(de)繼電(dian)器在(zai)電(dian)路中發揮各自的(de)保護功(gong)能(neng)。

負荷(he)開(kai)(kai)(kai)關(guan)(guan)：負荷(he)開(kai)(kai)(kai)關(guan)(guan)具有(you)簡(jian)單的滅弧裝置。滅弧介質通常是(shi)空氣，它(ta)(ta)可以產(chan)生并中(zhong)斷(duan)(duan)某些(xie)電(dian)流和過(guo)電(dian)流，但不(bu)能中(zhong)斷(duan)(duan)短(duan)路(lu)電(dian)流，也不(bu)能用(yong)于(yu)消除(chu)短(duan)路(lu)故障。因此(ci)，不(bu)允許簡(jian)單地(di)使用(yong)負載開(kai)(kai)(kai)關(guan)(guan)來替代斷(duan)(duan)路(lu)器(qi)。如果要使用(yong)斷(duan)(duan)路(lu)器(qi)，則必須將(jiang)它(ta)(ta)們與上述高(gao)壓熔斷(duan)(duan)器(qi)結合使用(yong)（實際上，斷(duan)(duan)路(lu)器(qi)和斷(duan)(duan)路(lu)器(qi)通常串(chuan)聯(lian)使用(yong)，以提供簡(jian)單的過(guo)載保護。以降(jiang)低項目成本）。負載開(kai)(kai)(kai)關(guan)(guan)類(lei)似于(yu)隔離(li)刀，并且(qie)有(you)明(ming)顯的隔離(li)間隙，很容(rong)易判斷(duan)(duan)電(dian)路(lu)是(shi)打(da)開(kai)(kai)(kai)還(huan)是(shi)關(guan)(guan)閉(bi)。