闡(chan)述保護(hu)用電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)互感(gan)器(qi)（TA）主要與繼(ji)電(dian)(dian)(dian)(dian)(dian)保護(hu)裝(zhuang)置配合使(shi)用。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(qi)設備發出信號，以切斷故(gu)障(zhang)電(dian)(dian)(dian)(dian)(dian)路(lu)，以保護(hu)電(dian)(dian)(dian)(dian)(dian)源系(xi)統的安全。工作條(tiao)件與換能器(qi)根(gen)本不同。傳(chuan)感(gan)器(qi)的正常初級電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)工作范(fan)圍(wei)相當(dang)準確。如(ru)果故(gu)障(zhang)短路(lu)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)通過，則變(bian)壓器(qi)應盡快(kuai)飽和，以保護(hu)儀表不受短路(lu)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)的損害(hai)。前者僅在電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)大于正常電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)幾倍或十倍并且其誤(wu)(wu)(wu)差（電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)和相位誤(wu)(wu)(wu)差）必須在誤(wu)(wu)(wu)差曲線范(fan)圍(wei)內時才開始(shi)工作。當(dang)同時評(ping)估電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)誤(wu)(wu)(wu)差和相位差時，將使(shi)用復合誤(wu)(wu)(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）。生產廠(chang)家一開始的(de)保護是多個繼電器(qi)(qi)具(ju)有不同的(de)功能。然后(hou)，不同的(de)繼電器(qi)(qi)在電路中發揮各自的(de)保護功能。

負(fu)荷開(kai)關：負(fu)荷開(kai)關具有簡單(dan)的(de)(de)滅弧裝置。滅弧介(jie)質(zhi)通常(chang)是(shi)空(kong)氣，它可以(yi)產生并中(zhong)斷(duan)(duan)(duan)某些電流(liu)(liu)和過電流(liu)(liu)，但不能中(zhong)斷(duan)(duan)(duan)短路(lu)電流(liu)(liu)，也不能用(yong)于消除短路(lu)故障。因此(ci)，不允許簡單(dan)地(di)使(shi)用(yong)負(fu)載(zai)(zai)開(kai)關來(lai)替代斷(duan)(duan)(duan)路(lu)器(qi)(qi)。如(ru)果要(yao)使(shi)用(yong)斷(duan)(duan)(duan)路(lu)器(qi)(qi)，則(ze)必(bi)須將它們(men)與上述高壓(ya)熔斷(duan)(duan)(duan)器(qi)(qi)結(jie)合使(shi)用(yong)（實際(ji)上，斷(duan)(duan)(duan)路(lu)器(qi)(qi)和斷(duan)(duan)(duan)路(lu)器(qi)(qi)通常(chang)串聯使(shi)用(yong)，以(yi)提供簡單(dan)的(de)(de)過載(zai)(zai)保護。以(yi)降低項目成(cheng)本）。負(fu)載(zai)(zai)開(kai)關類(lei)似于隔離(li)刀，并且有明(ming)顯的(de)(de)隔離(li)間隙，很容易判斷(duan)(duan)(duan)電路(lu)是(shi)打開(kai)還(huan)是(shi)關閉。