闡(chan)述保(bao)(bao)護(hu)(hu)用(yong)(yong)電(dian)(dian)(dian)(dian)流(liu)互(hu)感(gan)器(qi)（TA）主要與繼電(dian)(dian)(dian)(dian)保(bao)(bao)護(hu)(hu)裝置配合使(shi)用(yong)(yong)。如果(guo)發(fa)(fa)生短(duan)路或(huo)線(xian)(xian)路過載，它會(hui)向繼電(dian)(dian)(dian)(dian)器(qi)設備(bei)發(fa)(fa)出信號，以切(qie)斷故障電(dian)(dian)(dian)(dian)路，以保(bao)(bao)護(hu)(hu)電(dian)(dian)(dian)(dian)源系統(tong)的安全。工(gong)作(zuo)條件與換(huan)能器(qi)根(gen)本不同。傳感(gan)器(qi)的正常初(chu)級電(dian)(dian)(dian)(dian)流(liu)工(gong)作(zuo)范圍相(xiang)當準確。如果(guo)故障短(duan)路電(dian)(dian)(dian)(dian)流(liu)通(tong)過，則變(bian)壓器(qi)應盡快飽和，以保(bao)(bao)護(hu)(hu)儀(yi)表(biao)不受短(duan)路電(dian)(dian)(dian)(dian)流(liu)的損害(hai)。前(qian)者僅在電(dian)(dian)(dian)(dian)流(liu)大于正常電(dian)(dian)(dian)(dian)流(liu)幾倍(bei)或(huo)十(shi)倍(bei)并且其誤差（電(dian)(dian)(dian)(dian)流(liu)和相(xiang)位誤差）必須(xu)在誤差曲線(xian)(xian)范圍內時(shi)才開始(shi)工(gong)作(zuo)。當同時(shi)評(ping)估電(dian)(dian)(dian)(dian)流(liu)誤差和相(xiang)位差時(shi)，將使(shi)用(yong)(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）。生產廠(chang)家一開(kai)始的保(bao)護(hu)是(shi)多(duo)個(ge)繼電器具有不同的功能。然(ran)后，不同的繼電器在電路中(zhong)發揮(hui)各(ge)自的保(bao)護(hu)功能。

負荷開(kai)(kai)關(guan)：負荷開(kai)(kai)關(guan)具(ju)有(you)簡單(dan)的滅弧(hu)裝置。滅弧(hu)介質通常是空氣，它可以(yi)產生并中斷某(mou)些(xie)電流(liu)和過電流(liu)，但不能(neng)中斷短路電流(liu)，也不能(neng)用(yong)于(yu)消除短路故障。因此，不允許簡單(dan)地使(shi)(shi)用(yong)負載(zai)開(kai)(kai)關(guan)來替代(dai)斷路器。如果要(yao)使(shi)(shi)用(yong)斷路器，則必須將(jiang)它們與上述高壓(ya)熔斷器結合使(shi)(shi)用(yong)（實際上，斷路器和斷路器通常串聯使(shi)(shi)用(yong)，以(yi)提(ti)供簡單(dan)的過載(zai)保護。以(yi)降低項(xiang)目成本）。負載(zai)開(kai)(kai)關(guan)類似于(yu)隔(ge)離(li)刀(dao)，并且有(you)明顯的隔(ge)離(li)間隙(xi)，很容易判斷電路是打(da)開(kai)(kai)還是關(guan)閉。