一、產品用途及特點

     LLJ-□F（S）系列漏電(dian)繼電(dian)器（以(yi)下簡(jian)稱繼電(dian)器）適用于(yu)交(jiao)流電(dian)壓至(zhi)1140V，頻率為50Hz，該繼電(dian)(dian)器與(yu)分(fen)勵脫扣(kou)(kou)器或(huo)失壓脫扣(kou)(kou)器的斷路器、交流接觸器、磁力啟(qi)動器等組成(cheng)漏電(dian)(dian)保護裝置，作(zuo)漏電(dian)(dian)和觸電(dian)(dian)保護之(zhi)用，可配備蜂鳴(ming)器、信號等各種聲光器件結合(he)組成(cheng)漏電(dian)(dian)報警裝置。

    體積(ji)小，安(an)裝使用方便(bian)，動作(zuo)值固定分檔(dang)可調(diao)，動作(zuo)可靠，連續供(gong)電(dian)(dian)(dian)(dian)穩定，操作(zuo)簡易。能適應各地用戶(hu)，可以用來(lai)對線路進行(xing)接地故障保(bao)護，防止由于接地故障電(dian)(dian)(dian)(dian)流引起的設備(bei)事故或電(dian)(dian)(dian)(dian)氣火災(zai)，也可用來(lai)對人體觸電(dian)(dian)(dian)(dian)解除(chu)提供(gong)間接接觸保(bao)護。

     它(ta)適用于(yu)電(dian)(dian)源系統中(zhong)心點直接接地或不接地的(de)高、低壓配(pei)電(dian)(dian)系統。是安全使用的(de)網改(gai)產品(pin)。該繼電(dian)(dian)器的(de)動(dong)作(zuo)時間分快速(su)型(xing)和延時型(xing)，配(pei)合使用時對干線和支線進行分級選(xuan)擇保護，*可替代過去LLJ-□F（S）、LLJ-□H（S）、JD1及JD3系列漏電繼電器。

二、    ;         工(gong)作(zuo)原理(li)

    該(gai)繼(ji)電器(qi)是電子式電流(liu)動(dong)作型漏(lou)電繼(ji)電器(qi)，主要由零序電流(liu)互感器(qi)、電子線(xian)路、試驗回路及(ji)出口繼(ji)電器(qi)組成其(qi)工作原理如下：

    接(jie)線如圖（1），穿(chuan)入(ru)主(zhu)線(xian)路(lu)的零序互感(gan)器(qi)(qi)，在主(zhu)線(xian)路(lu)沒有漏(lou)電(dian)的情況下，矢量和(he)(he)等于零或極(ji)微，當主(zhu)線(xian)路(lu)上有漏(lou)電(dian)或人觸電(dian)時，零序互感(gan)器(qi)(qi)就感(gan)應到一(yi)個(ge)不平衡的電(dian)流矢量和(he)(he)信號，零序電(dian)流互感(gan)器(qi)(qi)的電(dian)路(lu)發(fa)生對地漏(lou)電(dian)時iA+iB+iC≠0。送入主機進行(xing)放大后，檢測(ce)漏(lou)電(dian)(dian)(dian)(dian)流(liu)是否超過整定值，并(bing)把結果送入執行(xing)機構來執行(xing)。此時零序電(dian)(dian)(dian)(dian)流(liu)互感(gan)器(qi)(qi)會產生一個(ge)感(gan)應信號(hao)，此信號(hao)經電(dian)(dian)(dian)(dian)子(zi)線(xian)路處理，當漏(lou)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流(liu)達到動(dong)作值時，使可控硅導通觸使繼電(dian)(dian)(dian)(dian)器(qi)(qi)動(dong)作，利用繼電(dian)(dian)(dian)(dian)器(qi)(qi)常開、閉點控制主線(xian)路斷路器(qi)(qi)或接觸器(qi)(qi)斷開，切(qie)除故障線(xian)路達到保護的(de)目的(de)。試(shi)驗(yan)回(hui)路由(you)電(dian)(dian)(dian)(dian)阻與按鈕等元件組成，按下試(shi)驗(yan)按鈕，有(you)一電(dian)(dian)(dian)(dian)流(liu)流(liu)過互感(gan)器(qi)(qi)，相當于主線(xian)路有(you)漏(lou)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流(liu)，指示(shi)燈亮，出口(kou)繼電(dian)(dian)(dian)(dian)器(qi)(qi)就應能動(dong)作。按下復(fu)歸(gui)按鈕，燈滅，出口(kou)繼電(dian)(dian)(dian)(dian)器(qi)(qi)返回(hui)。

三、型號含義及技術參數

四、繼電器外型及安裝外孔(kong)圖(tu)（mm）