電流繼電器的(de)分類及用途

從結構類型，電(dian)流繼(ji)電(dian)器分為：電(dian)磁式(shi)電(dian)流繼(ji)電(dian)器，靜態電(dian)流繼(ji)電(dian)器 電(dian)流繼(ji)電(dian)器

從安裝方式，電(dian)(dian)流(liu)(liu)繼(ji)(ji)電(dian)(dian)器分為(wei)：導軌電(dian)(dian)流(liu)(liu)繼(ji)(ji)電(dian)(dian)器，固定式電(dian)(dian)流(liu)(liu)繼(ji)(ji)電(dian)(dian)器 從電(dian)(dian)流(liu)(liu)動作，電(dian)(dian)流(liu)(liu)繼(ji)(ji)電(dian)(dian)器分為(wei) ：過電(dian)(dian)流(liu)(liu)繼(ji)(ji)電(dian)(dian)器，欠電(dian)(dian)流(liu)(liu)繼(ji)(ji)電(dian)(dian)器 從時(shi)性曲線，電(dian)(dian)流(liu)(liu)繼(ji)(ji)電(dian)(dian)器分為(wei)：定時(shi)限電(dian)(dian)流(liu)(liu)繼(ji)(ji)電(dian)(dian)器，反時(shi)限電(dian)(dian)流(liu)(liu)繼(ji)(ji)電(dian)(dian)器 從使用方面，電(dian)(dian)流(liu)(liu)繼(ji)(ji)電(dian)(dian)器分為(wei)：小型控(kong)制類(lei)繼(ji)(ji)電(dian)(dian)器，二(er)次回路保護繼(ji)(ji)電(dian)(dian)器電(dian)(dian)磁式電(dian)(dian)流(liu)(liu)繼(ji)(ji)電(dian)(dian)器

用途

電(dian)磁(ci)式(shi)電(dian)流繼電(dian)器(qi)，為(wei)電(dian)磁(ci)式(shi)瞬動過(guo)電(dian)流繼電(dian)器(qi)，它(ta)廣泛用于電(dian)力(li)系(xi)統二次回路繼電(dian)保(bao)護裝(zhuang)置(zhi)線路中，作為(wei)過(guo)電(dian)流啟動元件。

結構原理

1. 繼電(dian)(dian)器系電(dian)(dian)磁式，瞬時(shi)動作，磁系統有兩(liang)個線(xian)圈(quan)，線(xian)圈(quan)出頭接(jie)在底座端子上，用戶可以根據需要串并(bing)聯，因而(er)可使繼電(dian)(dian)器整(zheng)定變化一倍。

2. 繼電(dian)器名牌的刻(ke)度(du)值(zhi)及額定值(zhi)對于(yu)電(dian)流繼電(dian)器是線圈串聯的(以(yi)安(an)培為單位(wei))轉動刻(ke)度(du)盤(pan)上(shang)的指針、以(yi)改(gai)變(bian)游(you)絲的反作(zuo)用力矩，從而可以(yi)改(gai)變(bian)繼電(dian)器的動作(zuo)值(zhi)。

3. 繼電(dian)器(qi)的動(dong)(dong)(dong)(dong)作(zuo)：電(dian)流(liu)升至整(zheng)定(ding)值(zhi)或大(da)于整(zheng)定(ding)值(zhi)時，繼電(dian)器(qi)就動(dong)(dong)(dong)(dong)作(zuo)，動(dong)(dong)(dong)(dong)合觸(chu)(chu)點閉合，動(dong)(dong)(dong)(dong)斷觸(chu)(chu)點斷開(kai)。當電(dian)流(liu)降低到0.8倍整(zheng)定(ding)值(zhi)時，繼電(dian)器(qi)就返回，動(dong)(dong)(dong)(dong)合觸(chu)(chu)點斷開(kai)，動(dong)(dong)(dong)(dong)斷觸(chu)(chu)點閉合。

工作原理和特性

電(dian)(dian)磁(ci)(ci)繼(ji)電(dian)(dian)器(qi)的(de)(de)工作原理(li)和特性(xing)：電(dian)(dian)磁(ci)(ci)式繼(ji)電(dian)(dian)器(qi)一般由鐵(tie)(tie)芯(xin)、線(xian)圈(quan)、銜鐵(tie)(tie)、觸(chu)點(dian)(dian)簧片(pian)等組(zu)成(cheng)的(de)(de)。只要在(zai)線(xian)圈(quan)兩端加上一定的(de)(de)電(dian)(dian)壓，線(xian)圈(quan)中(zhong)就(jiu)(jiu)(jiu)會流過一定的(de)(de)電(dian)(dian)流，從(cong)而產(chan)生電(dian)(dian)磁(ci)(ci)效(xiao)應，銜鐵(tie)(tie)就(jiu)(jiu)(jiu)會在(zai)電(dian)(dian)磁(ci)(ci)力(li)吸(xi)引(yin)的(de)(de)作用(yong)下(xia)克服(fu)返(fan)回彈(dan)簧的(de)(de)拉(la)力(li)吸(xi)向鐵(tie)(tie)芯(xin)，從(cong)而帶動銜鐵(tie)(tie)的(de)(de)動觸(chu)點(dian)(dian)與靜(jing)(jing)觸(chu)點(dian)(dian)(常(chang)開觸(chu)點(dian)(dian))吸(xi)合(he)。當線(xian)圈(quan)斷(duan)電(dian)(dian)后，電(dian)(dian)磁(ci)(ci)的(de)(de)吸(xi)力(li)也隨(sui)之(zhi)消失(shi)，銜鐵(tie)(tie)就(jiu)(jiu)(jiu)會在(zai)彈(dan)簧的(de)(de)反作用(yong)力(li)返(fan)回原來(lai)的(de)(de)位置，使動觸(chu)點(dian)(dian)與原來(lai)的(de)(de)靜(jing)(jing)觸(chu)點(dian)(dian)(常(chang)閉(bi)(bi)觸(chu)點(dian)(dian))吸(xi)合(he)。這樣吸(xi)合(he)、釋放，從(cong)而達到了在(zai)電(dian)(dian)路中(zhong)的(de)(de)導通(tong)、切斷(duan)的(de)(de)目的(de)(de)。對于(yu)繼(ji)電(dian)(dian)器(qi)的(de)(de)“常(chang)開、常(chang)閉(bi)(bi)”觸(chu)點(dian)(dian)，可(ke)以這樣來(lai)區分(fen)：繼(ji)電(dian)(dian)器(qi)線(xian)圈(quan)未通(tong)電(dian)(dian)時(shi)處于(yu)斷(duan)開狀(zhuang)態的(de)(de)靜(jing)(jing)觸(chu)點(dian)(dian)，稱(cheng)為“常(chang)開觸(chu)點(dian)(dian)”;處于(yu)接(jie)通(tong)狀(zhuang)態的(de)(de)靜(jing)(jing)觸(chu)點(dian)(dian)稱(cheng)為“常(chang)閉(bi)(bi)觸(chu)點(dian)(dian)”。