闡述保護(hu)用(yong)電(dian)(dian)(dian)(dian)流(liu)互感器(qi)(qi)(qi)（TA）主(zhu)要與繼電(dian)(dian)(dian)(dian)保護(hu)裝置配合使用(yong)。如果發生短路或線(xian)路過載，它會向(xiang)繼電(dian)(dian)(dian)(dian)器(qi)(qi)(qi)設備發出(chu)信號，以切(qie)斷故(gu)障電(dian)(dian)(dian)(dian)路，以保護(hu)電(dian)(dian)(dian)(dian)源系(xi)統的(de)安全。工(gong)作條件(jian)與換能器(qi)(qi)(qi)根本不同。傳感器(qi)(qi)(qi)的(de)正常初級(ji)電(dian)(dian)(dian)(dian)流(liu)工(gong)作范(fan)圍相(xiang)(xiang)當準確。如果故(gu)障短路電(dian)(dian)(dian)(dian)流(liu)通過，則變壓(ya)器(qi)(qi)(qi)應盡(jin)快飽(bao)和，以保護(hu)儀表不受短路電(dian)(dian)(dian)(dian)流(liu)的(de)損害(hai)。前者僅(jin)在(zai)(zai)電(dian)(dian)(dian)(dian)流(liu)大于(yu)正常電(dian)(dian)(dian)(dian)流(liu)幾倍或十倍并且其(qi)誤差（電(dian)(dian)(dian)(dian)流(liu)和相(xiang)(xiang)位(wei)誤差）必須在(zai)(zai)誤差曲線(xian)范(fan)圍內時(shi)(shi)才開(kai)始工(gong)作。當同時(shi)(shi)評估(gu)電(dian)(dian)(dian)(dian)流(liu)誤差和相(xiang)(xiang)位(wei)差時(shi)(shi)，將使用(yong)復合誤差。

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）。生產(chan)廠家一開(kai)始(shi)的(de)保(bao)護是多個(ge)繼電器具有不(bu)同(tong)的(de)功能。然后，不(bu)同(tong)的(de)繼電器在電路中發(fa)揮各自的(de)保(bao)護功能。

負(fu)荷開(kai)關(guan)(guan)：負(fu)荷開(kai)關(guan)(guan)具有(you)簡(jian)單(dan)的(de)(de)滅(mie)弧(hu)裝置。滅(mie)弧(hu)介質(zhi)通常是空氣，它可以產生并(bing)中斷(duan)(duan)(duan)某些電流(liu)和過電流(liu)，但(dan)不(bu)能中斷(duan)(duan)(duan)短路(lu)電流(liu)，也不(bu)能用(yong)于消除短路(lu)故(gu)障。因此，不(bu)允許簡(jian)單(dan)地使用(yong)負(fu)載(zai)開(kai)關(guan)(guan)來替代斷(duan)(duan)(duan)路(lu)器(qi)(qi)。如果要使用(yong)斷(duan)(duan)(duan)路(lu)器(qi)(qi)，則(ze)必須將它們與(yu)上述(shu)高壓熔(rong)斷(duan)(duan)(duan)器(qi)(qi)結合使用(yong)（實際上，斷(duan)(duan)(duan)路(lu)器(qi)(qi)和斷(duan)(duan)(duan)路(lu)器(qi)(qi)通常串聯(lian)使用(yong)，以提供簡(jian)單(dan)的(de)(de)過載(zai)保護。以降低項目(mu)成本）。負(fu)載(zai)開(kai)關(guan)(guan)類似于隔離刀，并(bing)且有(you)明顯的(de)(de)隔離間隙，很容易判斷(duan)(duan)(duan)電路(lu)是打(da)開(kai)還是關(guan)(guan)閉。