闡述保護用(yong)(yong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)互感器(qi)（TA）主要與繼電(dian)(dian)(dian)(dian)(dian)(dian)(dian)保護裝置配合(he)使用(yong)(yong)。如(ru)(ru)果發(fa)生短路(lu)或線路(lu)過載，它會(hui)向(xiang)繼電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)設備發(fa)出信號，以切斷故(gu)障電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)，以保護電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源系統的(de)安全。工作(zuo)條件與換能器(qi)根本不(bu)同。傳(chuan)感器(qi)的(de)正(zheng)(zheng)常(chang)初級(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)工作(zuo)范圍相當(dang)準確。如(ru)(ru)果故(gu)障短路(lu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)通過，則變壓器(qi)應盡快飽和，以保護儀表不(bu)受短路(lu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)的(de)損害(hai)。前(qian)者僅在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)大于正(zheng)(zheng)常(chang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)幾倍(bei)或十倍(bei)并且其誤(wu)(wu)差（電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)和相位誤(wu)(wu)差）必須在(zai)誤(wu)(wu)差曲線范圍內時(shi)才開始工作(zuo)。當(dang)同時(shi)評估電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)誤(wu)(wu)差和相位差時(shi)，將(jiang)使用(yong)(yong)復合(he)誤(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）。生產廠家一(yi)開始的(de)(de)(de)保護是多個繼(ji)電(dian)器具有不同(tong)的(de)(de)(de)功(gong)能。然后(hou)，不同(tong)的(de)(de)(de)繼(ji)電(dian)器在電(dian)路中發(fa)揮各(ge)自(zi)的(de)(de)(de)保護功(gong)能。

負(fu)荷開關(guan)：負(fu)荷開關(guan)具有(you)(you)簡單(dan)(dan)的滅(mie)弧裝置。滅(mie)弧介(jie)質(zhi)通常(chang)是空(kong)氣，它(ta)可以(yi)產生并(bing)中斷(duan)(duan)(duan)某(mou)些電流(liu)和過電流(liu)，但不能中斷(duan)(duan)(duan)短路(lu)電流(liu)，也不能用(yong)于消除短路(lu)故障。因此，不允許簡單(dan)(dan)地使(shi)用(yong)負(fu)載(zai)開關(guan)來替代(dai)斷(duan)(duan)(duan)路(lu)器(qi)。如(ru)果要(yao)使(shi)用(yong)斷(duan)(duan)(duan)路(lu)器(qi)，則必須將它(ta)們與上述高(gao)壓熔(rong)斷(duan)(duan)(duan)器(qi)結合使(shi)用(yong)（實際(ji)上，斷(duan)(duan)(duan)路(lu)器(qi)和斷(duan)(duan)(duan)路(lu)器(qi)通常(chang)串聯(lian)使(shi)用(yong)，以(yi)提(ti)供簡單(dan)(dan)的過載(zai)保護(hu)。以(yi)降(jiang)低項目成(cheng)本）。負(fu)載(zai)開關(guan)類似于隔離刀(dao)，并(bing)且有(you)(you)明顯的隔離間隙，很容易判斷(duan)(duan)(duan)電路(lu)是打開還是關(guan)閉。