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)火災(zai)報(bao)警系統又名電(dian)(dian)氣火災(zai)監控報(bao)警系統，也(ye)可叫(jiao)做剩余電(dian)(dian)量報(bao)警系統。
漏(lou)電火(huo)災(zai)報(bao)警系(xi)(xi)統(tong)是(shi)一種(zhong)基于(yu)計算機技術的數字化監控網絡系(xi)(xi)統(tong)，其負責監控終端(duan)電氣故障，實(shi)現遠傳遠控和(he)報(bao)警顯示功能(neng)。漏(lou)電火(huo)災(zai)報(bao)警系(xi)(xi)統(tong)本身是(shi)一個聯網的整(zheng)體裝置，是(shi)一個完(wan)整(zheng)系(xi)(xi)統(tong)，應滿足《電氣火(huo)災(zai)監控系(xi)(xi)統(tong)》（GB14287-2005）的要求，而不(bu)是(shi)以(yi)往分散設置的單個漏(lou)電流報(bao)警器或傳統(tong)漏(lou)電開關。
二、漏電火災報警系統的原理介紹
原理：通(tong)過探測線(xian)路中的漏(lou)電(dian)流(liu)的大小來(lai)判斷火災發生的可能性，漏(lou)電(dian)是通(tong)過探測電(dian)氣線(xian)路三相電(dian)流(liu)瞬(shun)時值的矢量(liang)和。
漏電火災報警系統中(zhong)(zhong)的(de)(de)(de)(de)探(tan)測(ce)(ce)器(qi)(qi)使用的(de)(de)(de)(de)傳感(gan)(gan)元件為零(ling)(ling)序(xu)(xu)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)互(hu)感(gan)(gan)器(qi)(qi)，零(ling)(ling)序(xu)(xu)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)互(hu)感(gan)(gan)器(qi)(qi)探(tan)測(ce)(ce)剩余(yu)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)的(de)(de)(de)(de)基(ji)本原(yuan)理是基(ji)于(yu)基(ji)爾(er)霍夫電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)定(ding)律即(ji)流(liu)(liu)入電(dian)(dian)(dian)(dian)(dian)(dian)路中(zhong)(zhong)任(ren)一漏(lou)電(dian)(dian)(dian)(dian)(dian)(dian)火災報警系(xi)統節點(dian)的(de)(de)(de)(de)復電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)的(de)(de)(de)(de)代數(shu)和等(deng)于(yu)零(ling)(ling)，即(ji)ΣI=0。在(zai)測(ce)(ce)量(liang)時，三相(xiang)線A、B、C與中(zhong)(zhong)性線N一起穿過(guo)零(ling)(ling)序(xu)(xu)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)互(hu)感(gan)(gan)器(qi)(qi)，通(tong)過(guo)檢測(ce)(ce)三相(xiang)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)矢量(liang)和，即(ji)零(ling)(ling)序(xu)(xu)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)Io，Io=IA+IB+IC。在(zai)線路與電(dian)(dian)(dian)(dian)(dian)(dian)氣設備正常(chang)的(de)(de)(de)(de)情況(kuang)下（對零(ling)(ling)序(xu)(xu)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)保護假定(ding)不考慮不平衡(heng)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)，無接(jie)地(di)故障，且不考慮線路、電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)設備正常(chang)工作的(de)(de)(de)(de)泄(xie)漏(lou)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)），理論上各(ge)相(xiang)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)的(de)(de)(de)(de)矢量(liang)和等(deng)于(yu)零(ling)(ling)，零(ling)(ling)序(xu)(xu)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)互(hu)感(gan)(gan)器(qi)(qi)二次側繞組無電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)信(xin)號(hao)輸出。當發生(sheng)絕緣(yuan)下降(jiang)或接(jie)地(di)故障時的(de)(de)(de)(de)各(ge)相(xiang)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)的(de)(de)(de)(de)矢量(liang)和不為零(ling)(ling)，故障電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)使零(ling)(ling)序(xu)(xu)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)互(hu)感(gan)(gan)器(qi)(qi)的(de)(de)(de)(de)環形鐵芯中(zhong)(zhong)產生(sheng)磁通(tong)，二次側繞組感(gan)(gan)應電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)并輸出電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)信(xin)號(hao)，從而測(ce)(ce)出剩余(yu)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)。
考(kao)慮(lv)電(dian)(dian)(dian)氣線路的(de)(de)不平衡電(dian)(dian)(dian)流、線路和電(dian)(dian)(dian)氣設備正常的(de)(de)泄(xie)漏電(dian)(dian)(dian)流，實際的(de)(de)電(dian)(dian)(dian)氣線路都存在正常的(de)(de)剩余(yu)電(dian)(dian)(dian)流，只有檢測到(dao)剩余(yu)電(dian)(dian)(dian)流達(da)到(dao)報(bao)警(jing)值時才報(bao)警(jing)。
