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(huo)災報警系統又名電(dian)氣火(huo)災監控報警系統，也可叫做剩余電(dian)量報警系統。
漏電(dian)(dian)火(huo)(huo)災(zai)(zai)(zai)報(bao)(bao)警系統是一(yi)(yi)種基于(yu)計算機技術的(de)(de)數字化監(jian)控(kong)(kong)網絡系統，其負責監(jian)控(kong)(kong)終端電(dian)(dian)氣故(gu)障，實現遠傳遠控(kong)(kong)和(he)報(bao)(bao)警顯示功能(neng)。漏電(dian)(dian)火(huo)(huo)災(zai)(zai)(zai)報(bao)(bao)警系統本身是一(yi)(yi)個聯(lian)網的(de)(de)整(zheng)體裝置，是一(yi)(yi)個完整(zheng)系統，應滿足《電(dian)(dian)氣火(huo)(huo)災(zai)(zai)(zai)監(jian)控(kong)(kong)系統》（GB14287-2005）的(de)(de)要(yao)求，而不(bu)是以(yi)往分(fen)散設置的(de)(de)單(dan)個漏電(dian)(dian)流報(bao)(bao)警器(qi)或傳統漏電(dian)(dian)開關(guan)。
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)漏電(dian)流的(de)大小來判(pan)斷(duan)火災(zai)發生的(de)可能性，漏電(dian)是通過(guo)探測電(dian)氣線路(lu)三相電(dian)流瞬時值的(de)矢量和。
漏電火災報警系統中的(de)(de)探測(ce)器(qi)(qi)使用的(de)(de)傳感(gan)元件(jian)為(wei)零序(xu)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)互(hu)感(gan)器(qi)(qi)，零序(xu)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)互(hu)感(gan)器(qi)(qi)探測(ce)剩余(yu)(yu)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)的(de)(de)基本原理是基于(yu)基爾霍夫(fu)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)定(ding)(ding)律(lv)即流(liu)(liu)(liu)入電(dian)(dian)(dian)(dian)(dian)路中任一(yi)漏(lou)電(dian)(dian)(dian)(dian)(dian)火災(zai)報警系統節點的(de)(de)復電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)的(de)(de)代數和(he)等(deng)于(yu)零，即ΣI=0。在測(ce)量時，三(san)相(xiang)線A、B、C與中性線N一(yi)起(qi)穿過零序(xu)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)互(hu)感(gan)器(qi)(qi)，通過檢測(ce)三(san)相(xiang)的(de)(de)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)矢量和(he)，即零序(xu)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)Io，Io=IA+IB+IC。在線路與電(dian)(dian)(dian)(dian)(dian)氣設備正常(chang)的(de)(de)情況下（對零序(xu)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)保護假定(ding)(ding)不(bu)考慮不(bu)平衡電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)，無(wu)接地故障，且不(bu)考慮線路、電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)設備正常(chang)工(gong)作的(de)(de)泄漏(lou)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)），理論上各相(xiang)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)的(de)(de)矢量和(he)等(deng)于(yu)零，零序(xu)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)互(hu)感(gan)器(qi)(qi)二次側(ce)繞(rao)組(zu)無(wu)電(dian)(dian)(dian)(dian)(dian)壓(ya)信號輸出。當(dang)發(fa)生(sheng)絕(jue)緣下降或接地故障時的(de)(de)各相(xiang)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)的(de)(de)矢量和(he)不(bu)為(wei)零，故障電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)使零序(xu)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)互(hu)感(gan)器(qi)(qi)的(de)(de)環形(xing)鐵芯中產生(sheng)磁(ci)通，二次側(ce)繞(rao)組(zu)感(gan)應電(dian)(dian)(dian)(dian)(dian)壓(ya)并(bing)輸出電(dian)(dian)(dian)(dian)(dian)壓(ya)信號，從而(er)測(ce)出剩余(yu)(yu)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)。
考慮電(dian)(dian)(dian)氣(qi)線路的(de)不平衡電(dian)(dian)(dian)流、線路和電(dian)(dian)(dian)氣(qi)設備正(zheng)常(chang)的(de)泄(xie)漏(lou)電(dian)(dian)(dian)流，實(shi)際的(de)電(dian)(dian)(dian)氣(qi)線路都存在(zai)正(zheng)常(chang)的(de)剩余電(dian)(dian)(dian)流，只有檢測到(dao)(dao)剩余電(dian)(dian)(dian)流達到(dao)(dao)報(bao)警值時(shi)才報(bao)警。
