SJD25數(shu)字式(shi)熱繼(ji)電(dian)(dian)(dian)(dian)(dian)器(qi)是(shi)一款智能型(xing)電(dian)(dian)(dian)(dian)(dian)動(dong)機(ji)(ji)綜合保護器(qi),是(shi)傳統熱繼(ji)電(dian)(dian)(dian)(dian)(dian)器(qi)的(de)(de)升級(ji)換代產(chan)品。該(gai)產(chan)品采用數(shu)字處理技術,液晶顯(xian)示,通過內(nei)置的(de)(de)電(dian)(dian)(dian)(dian)(dian)流(liu)互感器(qi)檢測電(dian)(dian)(dian)(dian)(dian)動(dong)機(ji)(ji)的(de)(de)三相(xiang)負載電(dian)(dian)(dian)(dian)(dian)流(liu),可(ke)以顯(xian)示三相(xiang)電(dian)(dian)(dian)(dian)(dian)流(liu)并根據電(dian)(dian)(dian)(dian)(dian)流(liu)判斷(duan)(duan)是(shi)否存在(zai)過載或缺相(xiang)故(gu)障。當電(dian)(dian)(dian)(dian)(dian)動(dong)機(ji)(ji)發生故(gu)障時,內(nei)部繼(ji)電(dian)(dian)(dian)(dian)(dian)器(qi)觸(chu)點斷(duan)(duan)開,切斷(duan)(duan)電(dian)(dian)(dian)(dian)(dian)動(dong)機(ji)(ji)電(dian)(dian)(dian)(dian)(dian)源。
SJD25數(shu)字式熱繼電器/電動(dong)機綜合保護(hu)器2-25A(定(ding)時限)
一、產品概述
SJD25數字(zi)式熱繼電器 是(shi)一(yi)款智(zhi)能型電動機綜合保護器(qi),是(shi)傳(chuan)統熱繼電器(qi)的升級換代產(chan)品。 SJD25數(shu)字式熱(re)繼電(dian)器 采(cai)用數(shu)字處(chu)理技術,液晶顯示,通過內置的(de)電(dian)流(liu)互感器檢測電(dian)動(dong)(dong)機的(de)三(san)相(xiang)負載電(dian)流(liu),可以顯示三(san)相(xiang)電(dian)流(liu)并根據電(dian)流(liu)判斷是否(fou)存在(zai)過載或缺相(xiang)故(gu)障。當電(dian)動(dong)(dong)機發生故(gu)障時,內部(bu)繼電(dian)器觸點斷開,切(qie)斷電(dian)動(dong)(dong)機電(dian)源(yuan)。
二、主要功能
三、主要技術指標
指 標 |
規 格 |
額定電流設定范圍 |
2~25A |
電流測量精(jing)度 |
±1% |
電(dian)源電(dian)壓 |
AC 220V(以產(chan)品標簽為準) |
觸(chu)點容量 |
3A/440VAC(純阻性負(fu)載) |
正常工作時顯示三相平均電流,按 “ Sel ”鍵可以切換顯示 A 、 B 、 C 三(san)相(xiang)電(dian)流。發(fa)(fa)生過載、缺(que)相(xiang)故障(zhang)時(shi)顯示電(dian)流閃爍,表示這(zhe)是鎖定在(zai)發(fa)(fa)生故障(zhang)那一(yi)刻的電(dian)流(這(zhe)時(shi)電(dian)動機(ji)已(yi)斷(duan)電(dian),實際電(dian)流為 0 )。
長按 “ Sel ”鍵 2 秒,顯示(shi)“設定”,用“ 5 ”或(huo)“ 6 ”鍵改變設定值(按住“ 5 ”或“ 6 ”鍵不放可連發),設置好后按“ Sel ”鍵(jian)退出設置狀態。
發生(sheng)故障告(gao)警時(shi),會在(zai)顯示屏上閃爍顯示故障原(yuan)因(yin),此時(shi)繼電器斷開,并且鎖(suo)定在(zai)斷開狀(zhuang)態。這時(shi)只要按 “ 5 ”或“ 6 ”鍵即可從保護鎖定狀態恢(hui)復。也可給保護器重新上電(dian)來恢(hui)復。
NO 為內部(bu)繼電器常(chang)開點, NC 為常閉點(dian), CO 為公共(gong)點(dian)。保護器(qi)在斷電狀(zhuang)態下(xia),內部繼電器(qi)是在釋放狀(zhuang)態, 1 、 3 斷, 2 、 3 通(tong)(tong)。通(tong)(tong)電后,繼電器立即吸合, 1 、 3 通, 2 、 3 斷,控制接通電(dian)(dian)(dian)動機(ji)(ji)電(dian)(dian)(dian)源。當檢測(ce)到電(dian)(dian)(dian)動機(ji)(ji)出現故障時,繼(ji)電(dian)(dian)(dian)器釋(shi)放,斷開電(dian)(dian)(dian)動機(ji)(ji)電(dian)(dian)(dian)源。