闡述保(bao)(bao)(bao)護(hu)用電(dian)(dian)(dian)(dian)流互感器(qi)(qi)（TA）主要與(yu)繼電(dian)(dian)(dian)(dian)保(bao)(bao)(bao)護(hu)裝置配合(he)使用。如(ru)果發生短(duan)路或(huo)(huo)線路過載(zai)，它會向繼電(dian)(dian)(dian)(dian)器(qi)(qi)設(she)備發出信號，以切斷故(gu)障電(dian)(dian)(dian)(dian)路，以保(bao)(bao)(bao)護(hu)電(dian)(dian)(dian)(dian)源(yuan)系(xi)統的安(an)全(quan)。工(gong)作條(tiao)件(jian)與(yu)換能器(qi)(qi)根本不(bu)(bu)同(tong)。傳感器(qi)(qi)的正常(chang)初級電(dian)(dian)(dian)(dian)流工(gong)作范(fan)(fan)圍相當(dang)準確。如(ru)果故(gu)障短(duan)路電(dian)(dian)(dian)(dian)流通過，則變(bian)壓器(qi)(qi)應盡快飽(bao)和，以保(bao)(bao)(bao)護(hu)儀表不(bu)(bu)受(shou)短(duan)路電(dian)(dian)(dian)(dian)流的損害。前者(zhe)僅在電(dian)(dian)(dian)(dian)流大于正常(chang)電(dian)(dian)(dian)(dian)流幾倍或(huo)(huo)十(shi)倍并且(qie)其誤差（電(dian)(dian)(dian)(dian)流和相位誤差）必(bi)須在誤差曲線范(fan)(fan)圍內(nei)時(shi)才(cai)開(kai)始工(gong)作。當(dang)同(tong)時(shi)評估(gu)電(dian)(dian)(dian)(dian)流誤差和相位差時(shi)，將使用復合(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(chan)廠家(jia)一開始的保(bao)護是(shi)多個繼(ji)電(dian)器具有(you)不同(tong)的功能(neng)。然后，不同(tong)的繼(ji)電(dian)器在電(dian)路(lu)中發揮各自的保(bao)護功能(neng)。

負(fu)(fu)荷(he)開(kai)(kai)關(guan)：負(fu)(fu)荷(he)開(kai)(kai)關(guan)具有簡單的(de)滅(mie)弧裝(zhuang)置。滅(mie)弧介質(zhi)通常(chang)是(shi)空氣，它可(ke)以產(chan)生并中斷某些電(dian)流(liu)和過(guo)電(dian)流(liu)，但不(bu)能中斷短(duan)路(lu)(lu)電(dian)流(liu)，也不(bu)能用(yong)于消除短(duan)路(lu)(lu)故障。因此，不(bu)允(yun)許簡單地使(shi)用(yong)負(fu)(fu)載(zai)開(kai)(kai)關(guan)來替代斷路(lu)(lu)器。如(ru)果要使(shi)用(yong)斷路(lu)(lu)器，則必(bi)須(xu)將它們與上述高壓熔(rong)斷器結合使(shi)用(yong)（實(shi)際上，斷路(lu)(lu)器和斷路(lu)(lu)器通常(chang)串(chuan)聯使(shi)用(yong)，以提供簡單的(de)過(guo)載(zai)保護。以降低項目成本）。負(fu)(fu)載(zai)開(kai)(kai)關(guan)類似于隔離(li)刀，并且有明顯的(de)隔離(li)間(jian)隙，很容易判斷電(dian)路(lu)(lu)是(shi)打開(kai)(kai)還是(shi)關(guan)閉。