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)(dian)火(huo)災(zai)報警系統又名電(dian)(dian)氣火(huo)災(zai)監(jian)控(kong)報警系統，也可(ke)叫做剩余電(dian)(dian)量報警系統。
漏電(dian)火(huo)災(zai)報(bao)警(jing)(jing)系(xi)(xi)統(tong)是一(yi)種基于(yu)計算機技術的數字化監(jian)控(kong)網絡系(xi)(xi)統(tong)，其負(fu)責監(jian)控(kong)終端電(dian)氣故(gu)障(zhang)，實現遠(yuan)傳遠(yuan)控(kong)和報(bao)警(jing)(jing)顯示功(gong)能。漏電(dian)火(huo)災(zai)報(bao)警(jing)(jing)系(xi)(xi)統(tong)本身是一(yi)個聯網的整體裝(zhuang)置，是一(yi)個完(wan)整系(xi)(xi)統(tong)，應滿(man)足(zu)《電(dian)氣火(huo)災(zai)監(jian)控(kong)系(xi)(xi)統(tong)》（GB14287-2005）的要求，而不是以往(wang)分(fen)散設置的單個漏電(dian)流報(bao)警(jing)(jing)器(qi)或傳統(tong)漏電(dian)開關。
二、漏電火災報警系統的原理介紹
原理：通過(guo)探測線路(lu)中的(de)漏(lou)電(dian)流(liu)的(de)大小(xiao)來判斷火(huo)災發生的(de)可能性，漏(lou)電(dian)是通過(guo)探測電(dian)氣線路(lu)三相電(dian)流(liu)瞬(shun)時(shi)值的(de)矢量和(he)。
漏電火災報警系統中的(de)探測(ce)(ce)器(qi)使用(yong)的(de)傳感(gan)(gan)(gan)元(yuan)件為(wei)(wei)零(ling)序(xu)電(dian)(dian)(dian)流(liu)互(hu)感(gan)(gan)(gan)器(qi)，零(ling)序(xu)電(dian)(dian)(dian)流(liu)互(hu)感(gan)(gan)(gan)器(qi)探測(ce)(ce)剩余(yu)電(dian)(dian)(dian)流(liu)的(de)基本原理是基于(yu)基爾霍夫電(dian)(dian)(dian)流(liu)定律(lv)即(ji)流(liu)入電(dian)(dian)(dian)路(lu)(lu)中任一漏(lou)電(dian)(dian)(dian)火災報警系統(tong)節點的(de)復電(dian)(dian)(dian)流(liu)的(de)代(dai)數和(he)等于(yu)零(ling)，即(ji)ΣI=0。在測(ce)(ce)量(liang)時(shi)，三(san)相(xiang)線(xian)A、B、C與(yu)中性線(xian)N一起穿過零(ling)序(xu)電(dian)(dian)(dian)流(liu)互(hu)感(gan)(gan)(gan)器(qi)，通過檢測(ce)(ce)三(san)相(xiang)的(de)電(dian)(dian)(dian)流(liu)矢量(liang)和(he)，即(ji)零(ling)序(xu)電(dian)(dian)(dian)流(liu)Io，Io=IA+IB+IC。在線(xian)路(lu)(lu)與(yu)電(dian)(dian)(dian)氣設備(bei)正常的(de)情(qing)況下(xia)（對(dui)零(ling)序(xu)電(dian)(dian)(dian)流(liu)保護假定不(bu)考慮不(bu)平(ping)衡電(dian)(dian)(dian)流(liu)，無接(jie)地故障(zhang)，且不(bu)考慮線(xian)路(lu)(lu)、電(dian)(dian)(dian)器(qi)設備(bei)正常工作的(de)泄漏(lou)電(dian)(dian)(dian)流(liu)），理論上各相(xiang)電(dian)(dian)(dian)流(liu)的(de)矢量(liang)和(he)等于(yu)零(ling)，零(ling)序(xu)電(dian)(dian)(dian)流(liu)互(hu)感(gan)(gan)(gan)器(qi)二次側繞組(zu)無電(dian)(dian)(dian)壓信(xin)號輸(shu)出。當發生(sheng)絕緣下(xia)降或(huo)接(jie)地故障(zhang)時(shi)的(de)各相(xiang)電(dian)(dian)(dian)流(liu)的(de)矢量(liang)和(he)不(bu)為(wei)(wei)零(ling)，故障(zhang)電(dian)(dian)(dian)流(liu)使零(ling)序(xu)電(dian)(dian)(dian)流(liu)互(hu)感(gan)(gan)(gan)器(qi)的(de)環形鐵(tie)芯中產生(sheng)磁通，二次側繞組(zu)感(gan)(gan)(gan)應電(dian)(dian)(dian)壓并輸(shu)出電(dian)(dian)(dian)壓信(xin)號，從而測(ce)(ce)出剩余(yu)電(dian)(dian)(dian)流(liu)。
考慮(lv)電(dian)(dian)(dian)氣線(xian)路的不(bu)平衡(heng)電(dian)(dian)(dian)流(liu)(liu)、線(xian)路和(he)電(dian)(dian)(dian)氣設備正(zheng)常的泄漏電(dian)(dian)(dian)流(liu)(liu)，實際(ji)的電(dian)(dian)(dian)氣線(xian)路都(dou)存在正(zheng)常的剩(sheng)余(yu)電(dian)(dian)(dian)流(liu)(liu)，只有(you)檢測(ce)到剩(sheng)余(yu)電(dian)(dian)(dian)流(liu)(liu)達到報(bao)(bao)警(jing)值時才(cai)報(bao)(bao)警(jing)。
