一、漏電火災報警系統是什么
近年來，隨著電氣火災起數的不斷上升，漏電火災報警系統已經逐漸成為建筑消防電氣設計中必須考慮的一個重要組成部分。但是還有很多人不是很了解，不知道漏電火災報警系統是什么？
漏電(dian)火災(zai)報(bao)警系(xi)統(tong)(tong)又(you)名電(dian)氣火災(zai)監控(kong)報(bao)警系(xi)統(tong)(tong)，也可叫做剩余電(dian)量報(bao)警系(xi)統(tong)(tong)。
漏電(dian)(dian)火(huo)災(zai)(zai)報警(jing)系(xi)統(tong)(tong)是(shi)(shi)一種基于計算機(ji)技術的(de)(de)數(shu)字(zi)化監控(kong)(kong)網(wang)絡系(xi)統(tong)(tong)，其負責監控(kong)(kong)終端(duan)電(dian)(dian)氣故障，實現遠(yuan)傳遠(yuan)控(kong)(kong)和報警(jing)顯示(shi)功能。漏電(dian)(dian)火(huo)災(zai)(zai)報警(jing)系(xi)統(tong)(tong)本身是(shi)(shi)一個(ge)(ge)(ge)聯網(wang)的(de)(de)整體裝(zhuang)置，是(shi)(shi)一個(ge)(ge)(ge)完整系(xi)統(tong)(tong)，應滿足《電(dian)(dian)氣火(huo)災(zai)(zai)監控(kong)(kong)系(xi)統(tong)(tong)》（GB14287-2005）的(de)(de)要求，而不是(shi)(shi)以往分散設置的(de)(de)單(dan)個(ge)(ge)(ge)漏電(dian)(dian)流(liu)報警(jing)器(qi)或傳統(tong)(tong)漏電(dian)(dian)開關。
二、漏電火災報警系統的原理介紹
原理：通過探測線路(lu)中(zhong)的(de)漏(lou)電流(liu)的(de)大小來判斷火災發生(sheng)的(de)可能(neng)性，漏(lou)電是(shi)通過探測電氣線路(lu)三相電流(liu)瞬時(shi)值(zhi)的(de)矢量和(he)。
漏電火災報警系統中的(de)(de)探(tan)(tan)測(ce)(ce)器使用的(de)(de)傳感(gan)元件為零(ling)序(xu)(xu)(xu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)互感(gan)器，零(ling)序(xu)(xu)(xu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)互感(gan)器探(tan)(tan)測(ce)(ce)剩(sheng)余電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)的(de)(de)基(ji)本原理是基(ji)于(yu)基(ji)爾霍夫電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)定律即(ji)流(liu)(liu)(liu)(liu)(liu)入(ru)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)中任一漏電(dian)(dian)(dian)(dian)(dian)(dian)(dian)火(huo)災報警(jing)系統(tong)節點(dian)的(de)(de)復電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)的(de)(de)代數(shu)和(he)等(deng)于(yu)零(ling)，即(ji)ΣI=0。在(zai)測(ce)(ce)量(liang)時，三相(xiang)線(xian)(xian)A、B、C與中性線(xian)(xian)N一起穿過零(ling)序(xu)(xu)(xu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)互感(gan)器，通(tong)過檢測(ce)(ce)三相(xiang)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)矢量(liang)和(he)，即(ji)零(ling)序(xu)(xu)(xu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)Io，Io=IA+IB+IC。在(zai)線(xian)(xian)路(lu)與電(dian)(dian)(dian)(dian)(dian)(dian)(dian)氣設備正常的(de)(de)情況下（對零(ling)序(xu)(xu)(xu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)保護假定不(bu)考慮不(bu)平(ping)衡電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)，無(wu)接地故(gu)(gu)障，且不(bu)考慮線(xian)(xian)路(lu)、電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器設備正常工作(zuo)的(de)(de)泄漏電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)），理論上(shang)各相(xiang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)的(de)(de)矢量(liang)和(he)等(deng)于(yu)零(ling)，零(ling)序(xu)(xu)(xu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)互感(gan)器二次側繞組無(wu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)信號(hao)輸出。當(dang)發生(sheng)絕緣下降或接地故(gu)(gu)障時的(de)(de)各相(xiang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)的(de)(de)矢量(liang)和(he)不(bu)為零(ling)，故(gu)(gu)障電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)使零(ling)序(xu)(xu)(xu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)互感(gan)器的(de)(de)環形鐵芯中產生(sheng)磁通(tong)，二次側繞組感(gan)應電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)并(bing)輸出電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)信號(hao)，從(cong)而(er)測(ce)(ce)出剩(sheng)余電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)。
考慮電(dian)(dian)(dian)氣線路的(de)不平衡電(dian)(dian)(dian)流(liu)、線路和電(dian)(dian)(dian)氣設備(bei)正常的(de)泄漏電(dian)(dian)(dian)流(liu)，實際(ji)的(de)電(dian)(dian)(dian)氣線路都存在正常的(de)剩余電(dian)(dian)(dian)流(liu)，只有(you)檢測到剩余電(dian)(dian)(dian)流(liu)達到報警(jing)值時才報警(jing)。
