雙(shuang)電(dian)(dian)源(yuan)配電(dian)(dian)箱是一種特殊的配電(dian)(dian)設備，它具有兩個(ge)獨立(li)的電(dian)(dian)源(yuan)輸入端(duan)(duan)口和一個(ge)共同(tong)的輸出端(duan)(duan)口。這種配電(dian)(dian)箱可(ke)以(yi)實現雙(shuang)電(dian)(dian)源(yuan)供(gong)電(dian)(dian)，確保負載的正常運行(xing)。當其(qi)(qi)中一個(ge)電(dian)(dian)源(yuan)發生故(gu)障或斷電(dian)(dian)時，系統能夠自動切(qie)換到備用(yong)電(dian)(dian)源(yuan)進行(xing)供(gong)電(dian)(dian)。其(qi)(qi)工作原理如下：

在主(zhu)電(dian)源(yuan)(yuan)供電(dian)狀態下(xia)，主(zhu)電(dian)源(yuan)(yuan)接通，備用電(dian)源(yuan)(yuan)關閉，負載由主(zhu)電(dian)源(yuan)(yuan)供電(dian)。

當主電(dian)源斷電(dian)或異常時，備用(yong)電(dian)源供電(dian)線路自動切(qie)換(huan)至主線路，負(fu)載由備用(yong)電(dian)源供電(dian)，其切(qie)換(huan)時間不超過20ms。

當主電(dian)源恢復(fu)正常后(hou)，備(bei)用(yong)電(dian)源切換回備(bei)用(yong)狀態，等(deng)待下一次故障發(fa)生。

雙電(dian)(dian)(dian)(dian)源(yuan)配電(dian)(dian)(dian)(dian)箱的一(yi)個重要元器(qi)件是雙電(dian)(dian)(dian)(dian)源(yuan)自動(dong)切換(huan)開關(guan)，這(zhe)(zhe)是一(yi)種由微處(chu)理器(qi)控制，用于(yu)電(dian)(dian)(dian)(dian)網(wang)系統中網(wang)電(dian)(dian)(dian)(dian)與網(wang)電(dian)(dian)(dian)(dian)或網(wang)電(dian)(dian)(dian)(dian)與發電(dian)(dian)(dian)(dian)機電(dian)(dian)(dian)(dian)源(yuan)啟動(dong)切換(huan)的裝置，可使(shi)電(dian)(dian)(dian)(dian)源(yuan)連續源(yuan)供(gong)電(dian)(dian)(dian)(dian)。這(zhe)(zhe)種配電(dian)(dian)(dian)(dian)箱的適(shi)用范圍非(fei)常廣，常見的有電(dian)(dian)(dian)(dian)梯、消防、監控、建筑(zhu)等領(ling)域。