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？
漏電火災報警系統(tong)又(you)名(ming)電氣(qi)火災監(jian)控報警系統(tong)，也可(ke)叫做剩余電量報警系統(tong)。
漏電(dian)(dian)火災(zai)(zai)報警系統(tong)(tong)(tong)是(shi)一(yi)(yi)種基于計(ji)算(suan)機技術的(de)數(shu)字(zi)化監(jian)控網絡(luo)系統(tong)(tong)(tong)，其(qi)負責監(jian)控終端電(dian)(dian)氣(qi)故(gu)障(zhang)，實現遠(yuan)傳(chuan)遠(yuan)控和報警顯示(shi)功(gong)能。漏電(dian)(dian)火災(zai)(zai)報警系統(tong)(tong)(tong)本身是(shi)一(yi)(yi)個聯網的(de)整體裝置(zhi)，是(shi)一(yi)(yi)個完(wan)整系統(tong)(tong)(tong)，應(ying)滿足《電(dian)(dian)氣(qi)火災(zai)(zai)監(jian)控系統(tong)(tong)(tong)》（GB14287-2005）的(de)要(yao)求，而不是(shi)以往分(fen)散設置(zhi)的(de)單個漏電(dian)(dian)流報警器或傳(chuan)統(tong)(tong)(tong)漏電(dian)(dian)開關。
二、漏電火災報警系統的原理介紹
原理(li)：通過(guo)探(tan)測線(xian)路中的漏電流的大(da)小(xiao)來判(pan)斷火災發生的可能性(xing)，漏電是通過(guo)探(tan)測電氣線(xian)路三相電流瞬(shun)時值的矢量和。
漏電火災報警系統中(zhong)(zhong)的(de)(de)(de)(de)(de)(de)探測器使(shi)用的(de)(de)(de)(de)(de)(de)傳(chuan)感(gan)元件為零(ling)(ling)(ling)序電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)互(hu)感(gan)器，零(ling)(ling)(ling)序電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)互(hu)感(gan)器探測剩余(yu)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)的(de)(de)(de)(de)(de)(de)基本原理是基于(yu)基爾霍(huo)夫電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)定(ding)律即流(liu)(liu)(liu)入電(dian)(dian)(dian)(dian)路(lu)(lu)中(zhong)(zhong)任一(yi)漏電(dian)(dian)(dian)(dian)火災報警系統節點的(de)(de)(de)(de)(de)(de)復電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)的(de)(de)(de)(de)(de)(de)代(dai)數(shu)和(he)等于(yu)零(ling)(ling)(ling)，即ΣI=0。在測量時(shi)，三相(xiang)(xiang)線A、B、C與中(zhong)(zhong)性線N一(yi)起穿過零(ling)(ling)(ling)序電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)互(hu)感(gan)器，通過檢測三相(xiang)(xiang)的(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)矢量和(he)，即零(ling)(ling)(ling)序電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)Io，Io=IA+IB+IC。在線路(lu)(lu)與電(dian)(dian)(dian)(dian)氣設(she)備正常(chang)的(de)(de)(de)(de)(de)(de)情況下（對(dui)零(ling)(ling)(ling)序電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)保(bao)護(hu)假定(ding)不(bu)考慮不(bu)平衡(heng)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)，無接(jie)地(di)故(gu)障，且不(bu)考慮線路(lu)(lu)、電(dian)(dian)(dian)(dian)器設(she)備正常(chang)工作(zuo)的(de)(de)(de)(de)(de)(de)泄漏電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)），理論上各(ge)相(xiang)(xiang)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)的(de)(de)(de)(de)(de)(de)矢量和(he)等于(yu)零(ling)(ling)(ling)，零(ling)(ling)(ling)序電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)互(hu)感(gan)器二次側繞(rao)組無電(dian)(dian)(dian)(dian)壓(ya)(ya)信(xin)號輸(shu)出(chu)(chu)。當(dang)發生絕緣(yuan)下降(jiang)或接(jie)地(di)故(gu)障時(shi)的(de)(de)(de)(de)(de)(de)各(ge)相(xiang)(xiang)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)的(de)(de)(de)(de)(de)(de)矢量和(he)不(bu)為零(ling)(ling)(ling)，故(gu)障電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)使(shi)零(ling)(ling)(ling)序電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)互(hu)感(gan)器的(de)(de)(de)(de)(de)(de)環形(xing)鐵芯(xin)中(zhong)(zhong)產生磁通，二次側繞(rao)組感(gan)應(ying)電(dian)(dian)(dian)(dian)壓(ya)(ya)并輸(shu)出(chu)(chu)電(dian)(dian)(dian)(dian)壓(ya)(ya)信(xin)號，從(cong)而(er)測出(chu)(chu)剩余(yu)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)。
考慮電氣(qi)線路(lu)的不(bu)平衡電流、線路(lu)和電氣(qi)設備(bei)正常的泄漏電流，實際的電氣(qi)線路(lu)都(dou)存在正常的剩余電流，只有(you)檢測(ce)到剩余電流達到報警(jing)值(zhi)時才報警(jing)。
