闡(chan)述保(bao)(bao)(bao)護(hu)用電(dian)(dian)(dian)(dian)(dian)流(liu)互(hu)感器（TA）主要與(yu)繼電(dian)(dian)(dian)(dian)(dian)保(bao)(bao)(bao)護(hu)裝置配合使(shi)用。如果發(fa)生短路(lu)(lu)或線路(lu)(lu)過載，它會(hui)向繼電(dian)(dian)(dian)(dian)(dian)器設備發(fa)出(chu)信號，以(yi)切(qie)斷故障電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)，以(yi)保(bao)(bao)(bao)護(hu)電(dian)(dian)(dian)(dian)(dian)源系(xi)統的安全。工(gong)作(zuo)條件與(yu)換能器根(gen)本不同(tong)。傳感器的正常初級電(dian)(dian)(dian)(dian)(dian)流(liu)工(gong)作(zuo)范圍相當準確。如果故障短路(lu)(lu)電(dian)(dian)(dian)(dian)(dian)流(liu)通(tong)過，則變(bian)壓器應盡快飽和(he)，以(yi)保(bao)(bao)(bao)護(hu)儀表不受短路(lu)(lu)電(dian)(dian)(dian)(dian)(dian)流(liu)的損(sun)害。前者(zhe)僅在電(dian)(dian)(dian)(dian)(dian)流(liu)大于(yu)正常電(dian)(dian)(dian)(dian)(dian)流(liu)幾倍或十(shi)倍并且其誤(wu)差(cha)(cha)（電(dian)(dian)(dian)(dian)(dian)流(liu)和(he)相位(wei)誤(wu)差(cha)(cha)）必須在誤(wu)差(cha)(cha)曲線范圍內(nei)時(shi)才開始工(gong)作(zuo)。當同(tong)時(shi)評估電(dian)(dian)(dian)(dian)(dian)流(liu)誤(wu)差(cha)(cha)和(he)相位(wei)差(cha)(cha)時(shi)，將(jiang)使(shi)用復(fu)合誤(wu)差(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(jia)一開(kai)始的(de)保護(hu)是多個繼電(dian)(dian)器具有不同的(de)功(gong)能。然(ran)后，不同的(de)繼電(dian)(dian)器在電(dian)(dian)路中(zhong)發(fa)揮各自的(de)保護(hu)功(gong)能。

負荷開(kai)關(guan)(guan)：負荷開(kai)關(guan)(guan)具有簡(jian)(jian)單(dan)(dan)的滅弧裝置(zhi)。滅弧介質通(tong)常(chang)是(shi)空氣(qi)，它可以產生并中斷某些電(dian)流(liu)和(he)過(guo)電(dian)流(liu)，但不能中斷短(duan)路(lu)(lu)電(dian)流(liu)，也不能用(yong)于(yu)消除短(duan)路(lu)(lu)故障。因此，不允許簡(jian)(jian)單(dan)(dan)地(di)使(shi)用(yong)負載(zai)開(kai)關(guan)(guan)來替代斷路(lu)(lu)器。如果(guo)要(yao)使(shi)用(yong)斷路(lu)(lu)器，則必須將它們與上述高壓熔斷器結合使(shi)用(yong)（實際(ji)上，斷路(lu)(lu)器和(he)斷路(lu)(lu)器通(tong)常(chang)串聯使(shi)用(yong)，以提供簡(jian)(jian)單(dan)(dan)的過(guo)載(zai)保護。以降低項(xiang)目成本）。負載(zai)開(kai)關(guan)(guan)類似(si)于(yu)隔離刀，并且(qie)有明顯的隔離間(jian)隙，很(hen)容易判斷電(dian)路(lu)(lu)是(shi)打(da)開(kai)還(huan)是(shi)關(guan)(guan)閉。