闡述保(bao)護用電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)互感(gan)器(qi)（TA）主要與(yu)繼電(dian)(dian)(dian)(dian)(dian)(dian)(dian)保(bao)護裝置配合使用。如(ru)果發生短路或(huo)線路過(guo)載(zai)，它會向繼電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)設備發出信號，以切斷故障電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路，以保(bao)護電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源系統的安全。工(gong)作條件與(yu)換能(neng)器(qi)根本不同(tong)。傳感(gan)器(qi)的正(zheng)常(chang)初級電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)工(gong)作范圍(wei)相當準確。如(ru)果故障短路電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)通過(guo)，則變壓(ya)器(qi)應盡快飽和，以保(bao)護儀表(biao)不受(shou)短路電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)的損害。前者僅在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)大于正(zheng)常(chang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)幾倍或(huo)十倍并且(qie)其誤差(cha)(cha)(cha)（電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)和相位(wei)(wei)誤差(cha)(cha)(cha)）必須在(zai)誤差(cha)(cha)(cha)曲線范圍(wei)內時才(cai)開始工(gong)作。當同(tong)時評估電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)誤差(cha)(cha)(cha)和相位(wei)(wei)差(cha)(cha)(cha)時，將使用復(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）。生產廠家一開始的(de)保護是多(duo)個繼(ji)電器(qi)具有不(bu)同的(de)功能。然后，不(bu)同的(de)繼(ji)電器(qi)在電路(lu)中發揮各(ge)自的(de)保護功能。

負(fu)(fu)荷(he)開(kai)(kai)關(guan)(guan)(guan)：負(fu)(fu)荷(he)開(kai)(kai)關(guan)(guan)(guan)具(ju)有簡(jian)單的滅弧(hu)裝置。滅弧(hu)介質通(tong)常是(shi)空氣，它(ta)可以(yi)產生并中(zhong)斷(duan)(duan)(duan)某些電(dian)流和(he)(he)過電(dian)流，但不能中(zhong)斷(duan)(duan)(duan)短路(lu)電(dian)流，也(ye)不能用(yong)(yong)于消除短路(lu)故(gu)障。因此，不允許簡(jian)單地使(shi)用(yong)(yong)負(fu)(fu)載開(kai)(kai)關(guan)(guan)(guan)來替代斷(duan)(duan)(duan)路(lu)器(qi)。如(ru)果要(yao)使(shi)用(yong)(yong)斷(duan)(duan)(duan)路(lu)器(qi)，則必須將它(ta)們與上述高壓熔斷(duan)(duan)(duan)器(qi)結合使(shi)用(yong)(yong)（實(shi)際上，斷(duan)(duan)(duan)路(lu)器(qi)和(he)(he)斷(duan)(duan)(duan)路(lu)器(qi)通(tong)常串聯使(shi)用(yong)(yong)，以(yi)提供簡(jian)單的過載保護(hu)。以(yi)降低項目成本）。負(fu)(fu)載開(kai)(kai)關(guan)(guan)(guan)類似(si)于隔離刀，并且(qie)有明(ming)顯的隔離間隙，很(hen)容易判斷(duan)(duan)(duan)電(dian)路(lu)是(shi)打(da)開(kai)(kai)還是(shi)關(guan)(guan)(guan)閉。