閉鎖繼電(dian)(dian)(dian)器具有獨(du)特的(de)(de)功能,可用(yong)于任何基本(ben)繼電(dian)(dian)(dian)器形式,SPST、SPDT或DPDT。大多(duo)數(shu)繼電(dian)(dian)(dian)器和接觸器都被認(ren)(ren)為(wei)是“故障安(an)全(quan)型(xing)(xing)”。故障安(an)全(quan)型(xing)(xing)繼電(dian)(dian)(dian)器需要(yao)(yao)持續施加線(xian)圈(quan)電(dian)(dian)(dian)源(yuan),以確保繼電(dian)(dian)(dian)器切換。一(yi)旦線(xian)圈(quan)電(dian)(dian)(dian)源(yuan)斷開,故障保護繼電(dian)(dian)(dian)器中的(de)(de)可移(yi)動(dong)(dong)觸點(dian)將返回到其(qi)默(mo)認(ren)(ren)位置。閉鎖繼電(dian)(dian)(dian)器需要(yao)(yao)一(yi)個瞬時線(xian)圈(quan)脈沖(chong)來改變可移(yi)動(dong)(dong)觸點(dian)的(de)(de)位置。不需要(yao)(yao)連續的(de)(de)線(xian)圈(quan)功率來保持繼電(dian)(dian)(dian)器處于特定(ding)的(de)(de)開關狀態。當應(ying)用(yong)電(dian)(dian)(dian)路(lu)需要(yao)(yao)切換閉鎖繼電(dian)(dian)(dian)器時,它會(hui)向線(xian)圈(quan)發送脈沖(chong)以改變可移(yi)動(dong)(dong)觸點(dian)的(de)(de)位置。