繼電器是一種電控制器件，它具有控制系統（又稱輸入回路）和被控制系統（又稱輸出回路）之間的互動關系。通常應用于自動化的控制電路中，它實際上是用小電流去控制大電流運作的一種“自動開關”。故在電路中起著自動調節、安全保護、轉換電路等作用。

電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)一(yi)(yi)般由鐵芯、線(xian)圈(quan)、銜鐵、觸(chu)(chu)(chu)點(dian)簧(huang)片(pian)等(deng)組(zu)成的(de)(de)(de)。只要在線(xian)圈(quan)兩端加上一(yi)(yi)定的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)，線(xian)圈(quan)中(zhong)就(jiu)會(hui)流過一(yi)(yi)定的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)流，從而產生電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)效應，銜鐵就(jiu)會(hui)在電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)力吸(xi)引(yin)的(de)(de)(de)作用下克服(fu)返回(hui)彈簧(huang)的(de)(de)(de)拉力吸(xi)向(xiang)鐵芯，從而帶(dai)動(dong)(dong)銜鐵的(de)(de)(de)動(dong)(dong)觸(chu)(chu)(chu)點(dian)與靜(jing)(jing)觸(chu)(chu)(chu)點(dian)（常開觸(chu)(chu)(chu)點(dian)）吸(xi)合(he)。當(dang)線(xian)圈(quan)斷電(dian)(dian)(dian)(dian)(dian)(dian)后(hou)，電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)的(de)(de)(de)吸(xi)力也(ye)隨之消(xiao)失，銜鐵就(jiu)會(hui)在彈簧(huang)的(de)(de)(de)反作用力返回(hui)原來(lai)(lai)的(de)(de)(de)位置，使動(dong)(dong)觸(chu)(chu)(chu)點(dian)與原來(lai)(lai)的(de)(de)(de)靜(jing)(jing)觸(chu)(chu)(chu)點(dian)（常閉觸(chu)(chu)(chu)點(dian)）釋放。這樣吸(xi)合(he)、釋放，從而達到(dao)了在電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)中(zhong)的(de)(de)(de)導通(tong)、切(qie)斷的(de)(de)(de)目的(de)(de)(de)。對(dui)于(yu)(yu)繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)的(de)(de)(de)“常開、常閉”觸(chu)(chu)(chu)點(dian)，可以這樣來(lai)(lai)區分：繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)線(xian)圈(quan)未(wei)通(tong)電(dian)(dian)(dian)(dian)(dian)(dian)時處于(yu)(yu)斷開狀態(tai)的(de)(de)(de)靜(jing)(jing)觸(chu)(chu)(chu)點(dian)，稱(cheng)為(wei)(wei)“常開觸(chu)(chu)(chu)點(dian)”；處于(yu)(yu)接通(tong)狀態(tai)的(de)(de)(de)靜(jing)(jing)觸(chu)(chu)(chu)點(dian)稱(cheng)為(wei)(wei)“常閉觸(chu)(chu)(chu)點(dian)”。繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)一(yi)(yi)般有兩股電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)，為(wei)(wei)低壓(ya)控制電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)和高壓(ya)工作電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)。

科瑪森在繼電器的選擇上，選用了日本原裝進口的耐久性強，形狀小，觸點的允許電流大的和泉薄型功率繼電器。該類繼電器具有高容量和卓越的耐久性等優勢！