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)火災報(bao)(bao)警(jing)系(xi)統(tong)又名電(dian)氣火災監(jian)控報(bao)(bao)警(jing)系(xi)統(tong)，也可叫做剩(sheng)余電(dian)量報(bao)(bao)警(jing)系(xi)統(tong)。
漏(lou)(lou)電火災(zai)報(bao)警(jing)系統(tong)是一種基于(yu)計算機技術的(de)(de)數字化監控(kong)(kong)網(wang)絡系統(tong)，其負(fu)責(ze)監控(kong)(kong)終端電氣故障，實現(xian)遠傳遠控(kong)(kong)和報(bao)警(jing)顯示功能(neng)。漏(lou)(lou)電火災(zai)報(bao)警(jing)系統(tong)本身是一個聯(lian)網(wang)的(de)(de)整體(ti)裝置，是一個完(wan)整系統(tong)，應滿足《電氣火災(zai)監控(kong)(kong)系統(tong)》（GB14287-2005）的(de)(de)要(yao)求，而不是以往分散(san)設置的(de)(de)單個漏(lou)(lou)電流報(bao)警(jing)器或傳統(tong)漏(lou)(lou)電開關。
二、漏電火災報警系統的原理介紹
原(yuan)理：通(tong)過探測線路(lu)中的漏電流(liu)的大小來判斷火災發(fa)生的可能性，漏電是通(tong)過探測電氣線路(lu)三相(xiang)電流(liu)瞬時值(zhi)的矢量和(he)。
漏電火災報警系統中的(de)(de)(de)探測器(qi)使用(yong)的(de)(de)(de)傳感(gan)元(yuan)件為零(ling)(ling)序(xu)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)互(hu)感(gan)器(qi)，零(ling)(ling)序(xu)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)互(hu)感(gan)器(qi)探測剩(sheng)余(yu)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)的(de)(de)(de)基本原理是基于(yu)基爾(er)霍夫電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)定律即(ji)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)入電(dian)(dian)(dian)(dian)(dian)(dian)路中任一(yi)漏電(dian)(dian)(dian)(dian)(dian)(dian)火災報警(jing)系統節點的(de)(de)(de)復(fu)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)的(de)(de)(de)代(dai)數和(he)等于(yu)零(ling)(ling)，即(ji)ΣI=0。在測量時，三相(xiang)線(xian)A、B、C與(yu)中性線(xian)N一(yi)起(qi)穿過零(ling)(ling)序(xu)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)互(hu)感(gan)器(qi)，通過檢測三相(xiang)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)矢量和(he)，即(ji)零(ling)(ling)序(xu)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)Io，Io=IA+IB+IC。在線(xian)路與(yu)電(dian)(dian)(dian)(dian)(dian)(dian)氣設備正常的(de)(de)(de)情況下（對零(ling)(ling)序(xu)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)保護假(jia)定不(bu)(bu)考慮不(bu)(bu)平(ping)衡電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)，無接(jie)(jie)地故障(zhang)(zhang)，且不(bu)(bu)考慮線(xian)路、電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)設備正常工作的(de)(de)(de)泄漏電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)），理論上各(ge)相(xiang)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)的(de)(de)(de)矢量和(he)等于(yu)零(ling)(ling)，零(ling)(ling)序(xu)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)互(hu)感(gan)器(qi)二次(ci)側(ce)(ce)繞(rao)(rao)組(zu)無電(dian)(dian)(dian)(dian)(dian)(dian)壓信(xin)號輸出。當(dang)發生絕(jue)緣下降或接(jie)(jie)地故障(zhang)(zhang)時的(de)(de)(de)各(ge)相(xiang)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)的(de)(de)(de)矢量和(he)不(bu)(bu)為零(ling)(ling)，故障(zhang)(zhang)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)使零(ling)(ling)序(xu)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)互(hu)感(gan)器(qi)的(de)(de)(de)環形鐵芯(xin)中產生磁通，二次(ci)側(ce)(ce)繞(rao)(rao)組(zu)感(gan)應電(dian)(dian)(dian)(dian)(dian)(dian)壓并(bing)輸出電(dian)(dian)(dian)(dian)(dian)(dian)壓信(xin)號，從而測出剩(sheng)余(yu)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)。
考慮電氣(qi)線路(lu)的(de)(de)不平(ping)衡(heng)電流(liu)(liu)、線路(lu)和電氣(qi)設備(bei)正(zheng)常的(de)(de)泄漏電流(liu)(liu)，實際的(de)(de)電氣(qi)線路(lu)都(dou)存在正(zheng)常的(de)(de)剩余(yu)電流(liu)(liu)，只有(you)檢測到(dao)剩余(yu)電流(liu)(liu)達到(dao)報警(jing)(jing)值(zhi)時才報警(jing)(jing)。
