闡述保(bao)護(hu)用(yong)電(dian)(dian)(dian)(dian)(dian)(dian)流互感(gan)器(qi)(qi)（TA）主(zhu)要與繼電(dian)(dian)(dian)(dian)(dian)(dian)保(bao)護(hu)裝(zhuang)置配合使(shi)用(yong)。如(ru)(ru)果發(fa)生(sheng)短(duan)路或線(xian)路過載，它(ta)會向繼電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)設備發(fa)出(chu)信號，以(yi)切斷故(gu)障電(dian)(dian)(dian)(dian)(dian)(dian)路，以(yi)保(bao)護(hu)電(dian)(dian)(dian)(dian)(dian)(dian)源系統的(de)安全。工(gong)作(zuo)條(tiao)件與換能器(qi)(qi)根(gen)本不同。傳感(gan)器(qi)(qi)的(de)正(zheng)常(chang)初(chu)級電(dian)(dian)(dian)(dian)(dian)(dian)流工(gong)作(zuo)范圍相當(dang)準確。如(ru)(ru)果故(gu)障短(duan)路電(dian)(dian)(dian)(dian)(dian)(dian)流通過，則變(bian)壓器(qi)(qi)應盡快飽和(he)(he)，以(yi)保(bao)護(hu)儀表(biao)不受短(duan)路電(dian)(dian)(dian)(dian)(dian)(dian)流的(de)損害。前(qian)者僅在電(dian)(dian)(dian)(dian)(dian)(dian)流大于正(zheng)常(chang)電(dian)(dian)(dian)(dian)(dian)(dian)流幾倍或十(shi)倍并(bing)且其誤(wu)差(cha)（電(dian)(dian)(dian)(dian)(dian)(dian)流和(he)(he)相位誤(wu)差(cha)）必(bi)須在誤(wu)差(cha)曲線(xian)范圍內時才開始工(gong)作(zuo)。當(dang)同時評估電(dian)(dian)(dian)(dian)(dian)(dian)流誤(wu)差(cha)和(he)(he)相位差(cha)時，將使(shi)用(yong)復合誤(wu)差(cha)。

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）。生產廠家一開始的(de)保護是(shi)多(duo)個繼電(dian)器具(ju)有不同的(de)功能(neng)。然后，不同的(de)繼電(dian)器在電(dian)路中發揮各自的(de)保護功能(neng)。

負荷開(kai)關(guan)：負荷開(kai)關(guan)具(ju)有簡單的滅(mie)弧(hu)裝置。滅(mie)弧(hu)介質通常是空氣(qi)，它可以(yi)產生并中(zhong)斷(duan)(duan)某(mou)些(xie)電流和(he)過電流，但不(bu)能中(zhong)斷(duan)(duan)短路(lu)(lu)電流，也不(bu)能用(yong)于消除短路(lu)(lu)故障。因此，不(bu)允許簡單地使(shi)(shi)用(yong)負載(zai)開(kai)關(guan)來替(ti)代斷(duan)(duan)路(lu)(lu)器。如果要(yao)使(shi)(shi)用(yong)斷(duan)(duan)路(lu)(lu)器，則(ze)必(bi)須將它們(men)與上述高(gao)壓熔斷(duan)(duan)器結合使(shi)(shi)用(yong)（實際上，斷(duan)(duan)路(lu)(lu)器和(he)斷(duan)(duan)路(lu)(lu)器通常串聯使(shi)(shi)用(yong)，以(yi)提(ti)供簡單的過載(zai)保護。以(yi)降低項目成本(ben)）。負載(zai)開(kai)關(guan)類似(si)于隔離刀，并且(qie)有明顯的隔離間隙，很容易判斷(duan)(duan)電路(lu)(lu)是打開(kai)還是關(guan)閉(bi)。