AFDD（Arc Fault Detection Devices電(dian)(dian)(dian)弧(hu)(hu)故(gu)障保護(hu)電(dian)(dian)(dian)器(qi)(qi)）是一種新型電(dian)(dian)(dian)氣防(fang)火(huo)(huo) 保護(hu)裝置(zhi)，它(ta)(ta)可以避免因電(dian)(dian)(dian)路短(duan)路、電(dian)(dian)(dian)線老化、負載過重、接觸不良、電(dian)(dian)(dian)器(qi)(qi) 產品故(gu)障等引發的火(huo)(huo)災。AFDD內置(zhi)電(dian)(dian)(dian)腦芯片(pian)，實時(shi)自(zi)動控制。它(ta)(ta)的工作原 理是將檢測到(dao)的電(dian)(dian)(dian)弧(hu)(hu)脈沖(chong)通過電(dian)(dian)(dian)子電(dian)(dian)(dian)路和MCU（單片(pian)機(ji)）進(jin)行處(chu)理、比(bi)較、 鑒別(bie)，一旦(dan)檢測到(dao)容易(yi)產生火(huo)(huo)災的故(gu)障電(dian)(dian)(dian)弧(hu)(hu)脈沖(chong)后，輸出一信號驅動脫扣(kou)裝置(zhi)， 將負載電(dian)(dian)(dian)源切斷，從而防(fang)止火(huo)(huo)災發生。
