闡述保護用(yong)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)互感器(qi)(qi)（TA）主要與繼(ji)電(dian)(dian)(dian)(dian)(dian)保護裝置配合使(shi)用(yong)。如(ru)(ru)果(guo)發(fa)生短路或(huo)線路過載，它(ta)會向(xiang)繼(ji)電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)設備發(fa)出(chu)信號(hao)，以切斷故障(zhang)電(dian)(dian)(dian)(dian)(dian)路，以保護電(dian)(dian)(dian)(dian)(dian)源系統的安全。工(gong)作(zuo)(zuo)條件與換能器(qi)(qi)根本不(bu)(bu)同。傳感器(qi)(qi)的正常初級電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)工(gong)作(zuo)(zuo)范圍相當準(zhun)確(que)。如(ru)(ru)果(guo)故障(zhang)短路電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)通過，則(ze)變壓(ya)器(qi)(qi)應盡快(kuai)飽和，以保護儀表(biao)不(bu)(bu)受短路電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)的損害(hai)。前者僅在(zai)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)大于正常電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)幾倍或(huo)十倍并且其誤差(cha)（電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)和相位誤差(cha)）必須在(zai)誤差(cha)曲線范圍內時(shi)才開始工(gong)作(zuo)(zuo)。當同時(shi)評估電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)誤差(cha)和相位差(cha)時(shi)，將(jiang)使(shi)用(yong)復合誤差(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(sheng)產廠(chang)家一開始的保(bao)護是多個繼(ji)電(dian)器具有不(bu)同的功能。然后，不(bu)同的繼(ji)電(dian)器在電(dian)路中發揮(hui)各自的保(bao)護功能。

負荷開(kai)關(guan)：負荷開(kai)關(guan)具有(you)簡單(dan)的(de)(de)滅弧(hu)裝置。滅弧(hu)介質通(tong)常是(shi)(shi)空(kong)氣，它(ta)可以產生并中(zhong)斷(duan)(duan)某些電(dian)(dian)流(liu)(liu)和(he)過(guo)電(dian)(dian)流(liu)(liu)，但不(bu)能(neng)中(zhong)斷(duan)(duan)短路電(dian)(dian)流(liu)(liu)，也不(bu)能(neng)用(yong)于消除短路故(gu)障。因此，不(bu)允(yun)許簡單(dan)地使(shi)(shi)用(yong)負載(zai)開(kai)關(guan)來替代斷(duan)(duan)路器。如果要(yao)使(shi)(shi)用(yong)斷(duan)(duan)路器，則(ze)必須將(jiang)它(ta)們與上述高壓(ya)熔(rong)斷(duan)(duan)器結合使(shi)(shi)用(yong)（實際上，斷(duan)(duan)路器和(he)斷(duan)(duan)路器通(tong)常串聯(lian)使(shi)(shi)用(yong)，以提(ti)供簡單(dan)的(de)(de)過(guo)載(zai)保護(hu)。以降低項目成本）。負載(zai)開(kai)關(guan)類似于隔離刀，并且有(you)明顯的(de)(de)隔離間隙，很容易判斷(duan)(duan)電(dian)(dian)路是(shi)(shi)打開(kai)還是(shi)(shi)關(guan)閉。