闡述保(bao)(bao)(bao)(bao)護(hu)用電(dian)(dian)(dian)(dian)(dian)流(liu)互感(gan)器(qi)(qi)(qi)（TA）主要與繼電(dian)(dian)(dian)(dian)(dian)保(bao)(bao)(bao)(bao)護(hu)裝置(zhi)配(pei)合(he)使用。如(ru)果發(fa)生短路(lu)或線路(lu)過(guo)載，它會(hui)向繼電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)設備發(fa)出信號，以切斷(duan)故障電(dian)(dian)(dian)(dian)(dian)路(lu)，以保(bao)(bao)(bao)(bao)護(hu)電(dian)(dian)(dian)(dian)(dian)源系統的安全。工(gong)作條(tiao)件與換能器(qi)(qi)(qi)根本不同(tong)。傳感(gan)器(qi)(qi)(qi)的正常初級電(dian)(dian)(dian)(dian)(dian)流(liu)工(gong)作范圍相(xiang)當準確。如(ru)果故障短路(lu)電(dian)(dian)(dian)(dian)(dian)流(liu)通過(guo)，則變壓(ya)器(qi)(qi)(qi)應盡快(kuai)飽和(he)，以保(bao)(bao)(bao)(bao)護(hu)儀表不受短路(lu)電(dian)(dian)(dian)(dian)(dian)流(liu)的損害。前者僅在(zai)電(dian)(dian)(dian)(dian)(dian)流(liu)大于正常電(dian)(dian)(dian)(dian)(dian)流(liu)幾(ji)倍或十倍并且其誤(wu)差(cha)(cha)(cha)（電(dian)(dian)(dian)(dian)(dian)流(liu)和(he)相(xiang)位誤(wu)差(cha)(cha)(cha)）必須在(zai)誤(wu)差(cha)(cha)(cha)曲線范圍內(nei)時(shi)才開始工(gong)作。當同(tong)時(shi)評估電(dian)(dian)(dian)(dian)(dian)流(liu)誤(wu)差(cha)(cha)(cha)和(he)相(xiang)位差(cha)(cha)(cha)時(shi)，將(jiang)使用復(fu)合(he)誤(wu)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(kai)始的保護(hu)是多個繼(ji)(ji)電器(qi)具有不同(tong)的功能。然后，不同(tong)的繼(ji)(ji)電器(qi)在(zai)電路中發揮(hui)各(ge)自的保護(hu)功能。

負荷開(kai)(kai)關：負荷開(kai)(kai)關具有簡(jian)單的滅弧裝置。滅弧介質通常是(shi)空氣，它可以(yi)(yi)產(chan)生并中斷(duan)某些電(dian)流(liu)(liu)和過(guo)電(dian)流(liu)(liu)，但不(bu)能(neng)中斷(duan)短(duan)(duan)路(lu)(lu)電(dian)流(liu)(liu)，也不(bu)能(neng)用(yong)于(yu)消(xiao)除短(duan)(duan)路(lu)(lu)故障。因此，不(bu)允(yun)許(xu)簡(jian)單地使用(yong)負載開(kai)(kai)關來替代斷(duan)路(lu)(lu)器(qi)(qi)。如果(guo)要使用(yong)斷(duan)路(lu)(lu)器(qi)(qi)，則(ze)必須將它們與(yu)上述高壓熔斷(duan)器(qi)(qi)結合使用(yong)（實際(ji)上，斷(duan)路(lu)(lu)器(qi)(qi)和斷(duan)路(lu)(lu)器(qi)(qi)通常串聯使用(yong)，以(yi)(yi)提(ti)供簡(jian)單的過(guo)載保護。以(yi)(yi)降低項目成(cheng)本）。負載開(kai)(kai)關類似于(yu)隔(ge)離(li)刀(dao)，并且有明顯的隔(ge)離(li)間隙，很容(rong)易判斷(duan)電(dian)路(lu)(lu)是(shi)打開(kai)(kai)還是(shi)關閉。