闡述保(bao)(bao)護(hu)(hu)用(yong)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)互感器(qi)(qi)（TA）主要與(yu)繼電(dian)(dian)(dian)(dian)(dian)保(bao)(bao)護(hu)(hu)裝置(zhi)配合使(shi)(shi)用(yong)。如(ru)果發生短路或(huo)線(xian)路過(guo)載(zai)，它會向繼電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)設備發出(chu)信號，以(yi)(yi)切斷故(gu)障電(dian)(dian)(dian)(dian)(dian)路，以(yi)(yi)保(bao)(bao)護(hu)(hu)電(dian)(dian)(dian)(dian)(dian)源系統的安全。工(gong)作(zuo)(zuo)條件與(yu)換能(neng)器(qi)(qi)根(gen)本不同。傳感器(qi)(qi)的正常初(chu)級(ji)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)工(gong)作(zuo)(zuo)范圍相(xiang)(xiang)當準確。如(ru)果故(gu)障短路電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)通過(guo)，則變壓器(qi)(qi)應盡(jin)快飽和，以(yi)(yi)保(bao)(bao)護(hu)(hu)儀表不受短路電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)的損害(hai)。前(qian)者僅在(zai)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)大于正常電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)幾倍或(huo)十倍并且(qie)其誤(wu)差(cha)(cha)(cha)(cha)（電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)和相(xiang)(xiang)位(wei)誤(wu)差(cha)(cha)(cha)(cha)）必(bi)須在(zai)誤(wu)差(cha)(cha)(cha)(cha)曲線(xian)范圍內(nei)時才開(kai)始(shi)工(gong)作(zuo)(zuo)。當同時評估電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)誤(wu)差(cha)(cha)(cha)(cha)和相(xiang)(xiang)位(wei)差(cha)(cha)(cha)(cha)時，將(jiang)使(shi)(shi)用(yong)復(fu)合誤(wu)差(cha)(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(bao)護是多個繼電器具有不同的功(gong)能。然后，不同的繼電器在電路中發揮各自的保(bao)護功(gong)能。

負(fu)荷開(kai)關(guan)(guan)：負(fu)荷開(kai)關(guan)(guan)具(ju)有簡(jian)單(dan)的滅弧裝置。滅弧介質(zhi)通常是空氣，它(ta)可(ke)以產生并中斷(duan)(duan)(duan)某些電(dian)流(liu)和過電(dian)流(liu)，但不能中斷(duan)(duan)(duan)短路(lu)(lu)電(dian)流(liu)，也不能用(yong)(yong)于消除短路(lu)(lu)故障。因此，不允許(xu)簡(jian)單(dan)地使(shi)用(yong)(yong)負(fu)載(zai)(zai)開(kai)關(guan)(guan)來替(ti)代(dai)斷(duan)(duan)(duan)路(lu)(lu)器(qi)(qi)。如果要使(shi)用(yong)(yong)斷(duan)(duan)(duan)路(lu)(lu)器(qi)(qi)，則必須(xu)將它(ta)們與上述高(gao)壓熔斷(duan)(duan)(duan)器(qi)(qi)結合使(shi)用(yong)(yong)（實際(ji)上，斷(duan)(duan)(duan)路(lu)(lu)器(qi)(qi)和斷(duan)(duan)(duan)路(lu)(lu)器(qi)(qi)通常串(chuan)聯(lian)使(shi)用(yong)(yong)，以提供(gong)簡(jian)單(dan)的過載(zai)(zai)保(bao)護(hu)。以降低(di)項目成本）。負(fu)載(zai)(zai)開(kai)關(guan)(guan)類(lei)似于隔離刀，并且有明顯的隔離間隙，很容易判(pan)斷(duan)(duan)(duan)電(dian)路(lu)(lu)是打開(kai)還(huan)是關(guan)(guan)閉(bi)。