闡(chan)述保護(hu)(hu)(hu)(hu)用(yong)電(dian)(dian)(dian)(dian)流(liu)互感器（TA）主(zhu)要(yao)與(yu)繼電(dian)(dian)(dian)(dian)保護(hu)(hu)(hu)(hu)裝(zhuang)置配(pei)合使(shi)(shi)用(yong)。如果發(fa)生短路或(huo)線路過載，它會向繼電(dian)(dian)(dian)(dian)器設備發(fa)出信(xin)號，以切斷故(gu)障電(dian)(dian)(dian)(dian)路，以保護(hu)(hu)(hu)(hu)電(dian)(dian)(dian)(dian)源系統的安(an)全(quan)。工作(zuo)條(tiao)件與(yu)換能器根本不同。傳感器的正常(chang)初級電(dian)(dian)(dian)(dian)流(liu)工作(zuo)范圍相(xiang)當(dang)準(zhun)確。如果故(gu)障短路電(dian)(dian)(dian)(dian)流(liu)通(tong)過，則(ze)變(bian)壓器應盡快(kuai)飽(bao)和，以保護(hu)(hu)(hu)(hu)儀表不受(shou)短路電(dian)(dian)(dian)(dian)流(liu)的損害。前者僅在電(dian)(dian)(dian)(dian)流(liu)大于(yu)正常(chang)電(dian)(dian)(dian)(dian)流(liu)幾(ji)倍或(huo)十(shi)倍并(bing)且其誤(wu)差（電(dian)(dian)(dian)(dian)流(liu)和相(xiang)位(wei)誤(wu)差）必須在誤(wu)差曲(qu)線范圍內(nei)時才開始(shi)工作(zuo)。當(dang)同時評估電(dian)(dian)(dian)(dian)流(liu)誤(wu)差和相(xiang)位(wei)差時，將使(shi)(shi)用(yong)復合誤(wu)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)廠家一開(kai)始的(de)保護是多個繼電(dian)(dian)器具有不同的(de)功能。然后(hou)，不同的(de)繼電(dian)(dian)器在(zai)電(dian)(dian)路中發揮各自的(de)保護功能。

負(fu)(fu)荷開關(guan)：負(fu)(fu)荷開關(guan)具有(you)簡(jian)單的(de)(de)滅(mie)弧裝置(zhi)。滅(mie)弧介質通(tong)常(chang)是(shi)空氣，它(ta)可以產生并中(zhong)斷(duan)(duan)某些電(dian)(dian)(dian)流和過(guo)電(dian)(dian)(dian)流，但(dan)不能中(zhong)斷(duan)(duan)短路(lu)電(dian)(dian)(dian)流，也(ye)不能用(yong)(yong)于消(xiao)除短路(lu)故障。因(yin)此，不允(yun)許(xu)簡(jian)單地使(shi)用(yong)(yong)負(fu)(fu)載(zai)開關(guan)來替(ti)代斷(duan)(duan)路(lu)器。如(ru)果(guo)要使(shi)用(yong)(yong)斷(duan)(duan)路(lu)器，則必須將它(ta)們(men)與上述高壓(ya)熔斷(duan)(duan)器結合使(shi)用(yong)(yong)（實際(ji)上，斷(duan)(duan)路(lu)器和斷(duan)(duan)路(lu)器通(tong)常(chang)串聯使(shi)用(yong)(yong)，以提供簡(jian)單的(de)(de)過(guo)載(zai)保護。以降(jiang)低項目(mu)成(cheng)本）。負(fu)(fu)載(zai)開關(guan)類似于隔離刀，并且有(you)明顯的(de)(de)隔離間隙(xi)，很容易判(pan)斷(duan)(duan)電(dian)(dian)(dian)路(lu)是(shi)打開還是(shi)關(guan)閉(bi)。