闡述保(bao)護用(yong)(yong)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)互感器（TA）主要與繼(ji)電(dian)(dian)(dian)(dian)(dian)保(bao)護裝置(zhi)配(pei)合(he)使(shi)用(yong)(yong)。如果發生(sheng)短路(lu)或線(xian)路(lu)過(guo)(guo)載(zai)，它會(hui)向繼(ji)電(dian)(dian)(dian)(dian)(dian)器設備發出信號，以切斷故(gu)障電(dian)(dian)(dian)(dian)(dian)路(lu)，以保(bao)護電(dian)(dian)(dian)(dian)(dian)源系(xi)統的安全。工作(zuo)(zuo)條件與換能器根(gen)本(ben)不同(tong)。傳感器的正(zheng)常(chang)初級(ji)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)工作(zuo)(zuo)范(fan)圍相(xiang)當準確(que)。如果故(gu)障短路(lu)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)通(tong)過(guo)(guo)，則(ze)變壓器應(ying)盡快飽和，以保(bao)護儀表(biao)不受(shou)短路(lu)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)的損害。前者僅在(zai)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)大于正(zheng)常(chang)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)幾倍或十倍并(bing)且其誤差（電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)和相(xiang)位(wei)誤差）必須在(zai)誤差曲線(xian)范(fan)圍內時才開始工作(zuo)(zuo)。當同(tong)時評估電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)誤差和相(xiang)位(wei)差時，將使(shi)用(yong)(yong)復(fu)合(he)誤差。

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(sheng)產廠家一開(kai)始(shi)的(de)保護是(shi)多個繼電(dian)器具(ju)有不(bu)同的(de)功(gong)能(neng)。然后，不(bu)同的(de)繼電(dian)器在(zai)電(dian)路(lu)中發(fa)揮(hui)各自的(de)保護功(gong)能(neng)。

負荷(he)開關(guan)：負荷(he)開關(guan)具有簡單的滅弧裝(zhuang)置。滅弧介(jie)質通常(chang)是(shi)空氣，它可以產(chan)生(sheng)并中(zhong)(zhong)斷(duan)某些電(dian)流和(he)過電(dian)流，但不能(neng)中(zhong)(zhong)斷(duan)短路(lu)電(dian)流，也不能(neng)用于(yu)(yu)消除短路(lu)故障。因此(ci)，不允許簡單地(di)使(shi)(shi)用負載(zai)(zai)開關(guan)來替代斷(duan)路(lu)器(qi)。如果要使(shi)(shi)用斷(duan)路(lu)器(qi)，則(ze)必須將它們與上(shang)述高壓熔斷(duan)器(qi)結合(he)使(shi)(shi)用（實(shi)際上(shang)，斷(duan)路(lu)器(qi)和(he)斷(duan)路(lu)器(qi)通常(chang)串聯使(shi)(shi)用，以提供簡單的過載(zai)(zai)保(bao)護。以降低(di)項(xiang)目成本）。負載(zai)(zai)開關(guan)類似于(yu)(yu)隔離(li)刀(dao)，并且(qie)有明顯的隔離(li)間隙，很容(rong)易判斷(duan)電(dian)路(lu)是(shi)打(da)開還(huan)是(shi)關(guan)閉。