關于RM22TG20繼電器的主要參數，你了解多少？

　　RM22TG20繼電器一般由鐵芯、線圈、銜鐵、觸點簧片等組成的。只要在線圈兩端加上一定的電壓，線圈中就會流過一定的電流，從而產生電磁效應，銜鐵就會在電磁力吸引的作用下克服返回彈簧的拉力吸向鐵芯，從而帶動銜鐵的動觸點與靜觸點結合。
　　
　　當線(xian)圈斷電(dian)(dian)后，電(dian)(dian)磁的(de)(de)吸力(li)也(ye)隨(sui)之消失，銜鐵就會在(zai)(zai)彈簧的(de)(de)作(zuo)用下恢復到原來(lai)的(de)(de)位置，使動觸點與(yu)原來(lai)的(de)(de)靜觸點斷開。從而達到了在(zai)(zai)電(dian)(dian)路中的(de)(de)導通、切斷的(de)(de)目的(de)(de)。
　　
　　繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)一般配置有輔助(zhu)觸點(dian)(dian)(dian)，所(suo)謂常(chang)開(kai)(kai)觸點(dian)(dian)(dian)，就(jiu)是繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)線(xian)(xian)圈(quan)未通電(dian)(dian)(dian)(dian)(dian)(dian)時(shi)處于斷開(kai)(kai)狀態的觸點(dian)(dian)(dian)；所(suo)謂常(chang)閉觸點(dian)(dian)(dian)，就(jiu)是線(xian)(xian)圈(quan)未通電(dian)(dian)(dian)(dian)(dian)(dian)時(shi)處于導通狀態的觸點(dian)(dian)(dian)。繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)線(xian)(xian)圈(quan)得(de)電(dian)(dian)(dian)(dian)(dian)(dian)動作，常(chang)開(kai)(kai)觸點(dian)(dian)(dian)會閉合，常(chang)閉觸點(dian)(dian)(dian)會斷開(kai)(kai)。繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)從本質上講就(jiu)是以小電(dian)(dian)(dian)(dian)(dian)(dian)流控制大電(dian)(dian)(dian)(dian)(dian)(dian)流，這一點(dian)(dian)(dian)與接觸器(qi)類似。
　　
　　RM22TG20繼電器的主要參(can)數：
　　
　　額定(ding)工(gong)作(zuo)電(dian)壓：是指(zhi)繼電(dian)器正(zheng)常工(gong)作(zuo)時線(xian)圈所需要的電(dian)壓。根據繼電(dian)器的型號不同，可以(yi)是交(jiao)流電(dian)壓，也可以(yi)是直流電(dian)壓。
　　
　　吸(xi)(xi)合(he)電壓：使繼電器觸點吸(xi)(xi)合(he)的zui小(xiao)線(xian)圈電壓（從(cong)小(xiao)到(dao)大(da)測(ce)試）。
　　
　　釋放(fang)電(dian)壓(ya)：保證(zheng)繼電(dian)器觸點釋放(fang)的zui大(da)線圈電(dian)壓(ya)（從大(da)到小(xiao)測試）。
　　
　　吸合(he)電(dian)(dian)流：是指(zhi)繼電(dian)(dian)器能夠產生(sheng)吸合(he)動作的(de)zui小(xiao)電(dian)(dian)流。在正常使用時，給定(ding)的(de)電(dian)(dian)流必(bi)須略大(da)于(yu)吸合(he)電(dian)(dian)流，這樣繼電(dian)(dian)器才能穩定(ding)地工作。而對于(yu)線圈(quan)所(suo)加的(de)工作電(dian)(dian)壓(ya)，不要超過額(e)定(ding)工作電(dian)(dian)壓(ya)的(de)1.5倍，否則會產生(sheng)較大(da)的(de)電(dian)(dian)流而把線圈(quan)燒毀。
　　
　　釋放電(dian)(dian)流：是指繼電(dian)(dian)器產生釋放動作的(de)(de)zui大電(dian)(dian)流。當繼電(dian)(dian)器吸合狀(zhuang)態(tai)的(de)(de)電(dian)(dian)流減小(xiao)到(dao)一定程度時(shi)，繼電(dian)(dian)器就會恢復到(dao)未通電(dian)(dian)的(de)(de)釋放狀(zhuang)態(tai)。這時(shi)的(de)(de)電(dian)(dian)流遠遠小(xiao)于吸合電(dian)(dian)流
　　
　　接觸電(dian)阻(zu)(zu)：是(shi)指繼(ji)電(dian)器(qi)中接點(dian)接觸后的電(dian)阻(zu)(zu)值，可以通過萬用表測量。對于許多繼(ji)電(dian)器(qi)來說，接觸電(dian)阻(zu)(zu)無窮大或者不穩(wen)定是(shi)zui大的問題(ti)。