闡述(shu)保(bao)護(hu)(hu)用(yong)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)互感器（TA）主(zhu)要與(yu)繼(ji)電(dian)(dian)(dian)(dian)(dian)保(bao)護(hu)(hu)裝置(zhi)配合使(shi)用(yong)。如(ru)果發生短路(lu)或線路(lu)過載，它會向繼(ji)電(dian)(dian)(dian)(dian)(dian)器設備發出(chu)信(xin)號，以切斷故障電(dian)(dian)(dian)(dian)(dian)路(lu)，以保(bao)護(hu)(hu)電(dian)(dian)(dian)(dian)(dian)源系統的安全(quan)。工(gong)作(zuo)條(tiao)件(jian)與(yu)換(huan)能器根(gen)本(ben)不同。傳感器的正(zheng)常(chang)初級電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)工(gong)作(zuo)范(fan)圍(wei)相當準確(que)。如(ru)果故障短路(lu)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)通(tong)過，則變壓器應盡快飽和，以保(bao)護(hu)(hu)儀(yi)表不受(shou)短路(lu)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)的損害(hai)。前者(zhe)僅在電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)大于(yu)正(zheng)常(chang)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)幾倍或十倍并且其誤差（電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)和相位誤差）必須(xu)在誤差曲線范(fan)圍(wei)內(nei)時(shi)才開始工(gong)作(zuo)。當同時(shi)評(ping)估電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)誤差和相位差時(shi)，將使(shi)用(yong)復(fu)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）。生產廠家(jia)一開始的(de)保(bao)護(hu)是多個繼電(dian)器具有不同的(de)功(gong)能(neng)。然后，不同的(de)繼電(dian)器在電(dian)路中發揮各自的(de)保(bao)護(hu)功(gong)能(neng)。

負(fu)(fu)荷開(kai)關(guan)(guan)(guan)：負(fu)(fu)荷開(kai)關(guan)(guan)(guan)具有簡(jian)(jian)單的(de)滅弧裝置。滅弧介質通(tong)常是(shi)空氣，它(ta)可(ke)以(yi)產(chan)生并(bing)中(zhong)斷(duan)某(mou)些電(dian)(dian)(dian)流(liu)(liu)和過(guo)電(dian)(dian)(dian)流(liu)(liu)，但不能中(zhong)斷(duan)短(duan)路電(dian)(dian)(dian)流(liu)(liu)，也不能用(yong)(yong)于消除短(duan)路故障。因(yin)此，不允(yun)許簡(jian)(jian)單地使用(yong)(yong)負(fu)(fu)載(zai)開(kai)關(guan)(guan)(guan)來替代(dai)斷(duan)路器。如果要使用(yong)(yong)斷(duan)路器，則必(bi)須(xu)將它(ta)們(men)與(yu)上述(shu)高壓熔斷(duan)器結合使用(yong)(yong)（實際上，斷(duan)路器和斷(duan)路器通(tong)常串聯使用(yong)(yong)，以(yi)提(ti)供簡(jian)(jian)單的(de)過(guo)載(zai)保護。以(yi)降(jiang)低項目(mu)成(cheng)本(ben)）。負(fu)(fu)載(zai)開(kai)關(guan)(guan)(guan)類似(si)于隔離(li)刀，并(bing)且有明顯的(de)隔離(li)間隙，很(hen)容易判(pan)斷(duan)電(dian)(dian)(dian)路是(shi)打開(kai)還是(shi)關(guan)(guan)(guan)閉。