闡(chan)述保(bao)(bao)護用(yong)電(dian)(dian)(dian)(dian)(dian)流(liu)互感器(qi)(qi)（TA）主要與繼電(dian)(dian)(dian)(dian)(dian)保(bao)(bao)護裝置(zhi)配(pei)合使(shi)用(yong)。如(ru)果發生短(duan)路(lu)或(huo)線路(lu)過(guo)(guo)載，它會向繼電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)設備發出(chu)信號，以切斷故(gu)障(zhang)電(dian)(dian)(dian)(dian)(dian)路(lu)，以保(bao)(bao)護電(dian)(dian)(dian)(dian)(dian)源系(xi)統的安全。工(gong)作條(tiao)件與換能器(qi)(qi)根本不同(tong)。傳感器(qi)(qi)的正常初級電(dian)(dian)(dian)(dian)(dian)流(liu)工(gong)作范圍相(xiang)當(dang)準確(que)。如(ru)果故(gu)障(zhang)短(duan)路(lu)電(dian)(dian)(dian)(dian)(dian)流(liu)通過(guo)(guo)，則變(bian)壓器(qi)(qi)應(ying)盡快(kuai)飽(bao)和，以保(bao)(bao)護儀(yi)表不受短(duan)路(lu)電(dian)(dian)(dian)(dian)(dian)流(liu)的損害。前者僅在(zai)(zai)電(dian)(dian)(dian)(dian)(dian)流(liu)大于正常電(dian)(dian)(dian)(dian)(dian)流(liu)幾倍或(huo)十倍并且其誤差(cha)(cha)（電(dian)(dian)(dian)(dian)(dian)流(liu)和相(xiang)位(wei)誤差(cha)(cha)）必(bi)須在(zai)(zai)誤差(cha)(cha)曲線范圍內時才開始工(gong)作。當(dang)同(tong)時評估電(dian)(dian)(dian)(dian)(dian)流(liu)誤差(cha)(cha)和相(xiang)位(wei)差(cha)(cha)時，將使(shi)用(yong)復合誤差(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)始的保護(hu)是多個(ge)繼(ji)電器具有不同(tong)的功(gong)能。然后(hou)，不同(tong)的繼(ji)電器在(zai)電路中(zhong)發揮(hui)各(ge)自(zi)的保護(hu)功(gong)能。

負荷開關(guan)(guan)：負荷開關(guan)(guan)具有(you)簡(jian)(jian)單的(de)滅(mie)弧裝置。滅(mie)弧介(jie)質(zhi)通常是(shi)空氣，它可以產生(sheng)并(bing)中(zhong)斷(duan)(duan)某些(xie)電(dian)流和過(guo)電(dian)流，但不(bu)能中(zhong)斷(duan)(duan)短路(lu)(lu)電(dian)流，也不(bu)能用(yong)于消除(chu)短路(lu)(lu)故障。因此，不(bu)允許簡(jian)(jian)單地使(shi)用(yong)負載開關(guan)(guan)來替代斷(duan)(duan)路(lu)(lu)器(qi)。如果(guo)要使(shi)用(yong)斷(duan)(duan)路(lu)(lu)器(qi)，則必須(xu)將它們(men)與上述(shu)高壓(ya)熔斷(duan)(duan)器(qi)結合(he)使(shi)用(yong)（實際上，斷(duan)(duan)路(lu)(lu)器(qi)和斷(duan)(duan)路(lu)(lu)器(qi)通常串聯(lian)使(shi)用(yong)，以提供簡(jian)(jian)單的(de)過(guo)載保護。以降低項目(mu)成本）。負載開關(guan)(guan)類似于隔離刀(dao)，并(bing)且有(you)明(ming)顯的(de)隔離間隙，很(hen)容(rong)易判斷(duan)(duan)電(dian)路(lu)(lu)是(shi)打開還是(shi)關(guan)(guan)閉。