一、什么是接觸器
接觸器分為交流(liu)接觸(chu)器(電(dian)壓AC)和直(zhi)流(liu)接觸(chu)器(電(dian)壓DC),它應用(yong)于電(dian)力、配(pei)電(dian)與用(yong)電(dian)場合(he)。接觸(chu)器廣義上是指工業電(dian)中利用(yong)線(xian)圈(quan)流(liu)過電(dian)流(liu)產生磁(ci)場,使觸(chu)頭閉合(he),以達到控(kong)制負載的(de)電(dian)器。
二、什么是繼電器
繼(ji)電(dian)(dian)(dian)(dian)器是一(yi)種自動電(dian)(dian)(dian)(dian)器,它適用于遠(yuan)距離(li)接通和分斷交、直流小容量控制(zhi)電(dian)(dian)(dian)(dian)路,并在電(dian)(dian)(dian)(dian)力(li)驅動系(xi)統(tong)中供控制(zhi)、保護及(ji)信號(hao)轉換用。控制(zhi)繼(ji)電(dian)(dian)(dian)(dian)器的輸(shu)(shu)入量通常是電(dian)(dian)(dian)(dian)流、電(dian)(dian)(dian)(dian)壓等電(dian)(dian)(dian)(dian)量,也可以是溫度(du)、壓力(li)、速度(du)等非電(dian)(dian)(dian)(dian)量,輸(shu)(shu)出量則是觸點(dian)動作時發(fa)出的電(dian)(dian)(dian)(dian)信號(hao)或輸(shu)(shu)出電(dian)(dian)(dian)(dian)路的參(can)數變(bian)(bian)化(hua)。繼(ji)電(dian)(dian)(dian)(dian)器的特點(dian)是當其(qi)輸(shu)(shu)入量的變(bian)(bian)化(hua)達到一(yi)定程序時,輸(shu)(shu)出量才會(hui)發(fa)生階躍性的變(bian)(bian)化(hua)。
三、接觸器和繼電器的區別
1、觸點容量不同
接觸(chu)(chu)器(qi)的觸(chu)(chu)點容量大于(yu)繼電器(qi),接觸(chu)(chu)器(qi)的觸(chu)(chu)頭沒有低于(yu)10A的,而繼電器(qi)的容量則最高不會超過5A。
2、觸點數設計不同
接觸器(qi)的觸點數(shu)不是成對(dui)設計,三(san)組常(chang)(chang)開觸點為主觸點,再加上輔助(zhu)觸點常(chang)(chang)開和(he)常(chang)(chang)閉。繼(ji)電器(qi)的觸點數(shu)是成對(dui)設計,且沒有輔助(zhu)觸點的。
3、作用不同
繼電(dian)(dian)(dian)器的作(zuo)(zuo)用(yong)(yong)是起(qi)到(dao)信號的檢測、轉換以及傳送(song)等作(zuo)(zuo)用(yong)(yong),而且它的觸點通(tong)斷(duan)(duan)電(dian)(dian)(dian)流比較小(xiao),常(chang)用(yong)(yong)在控制電(dian)(dian)(dian)路(lu)中。接(jie)觸器的作(zuo)(zuo)用(yong)(yong)就是起(qi)到(dao)接(jie)通(tong)或是切斷(duan)(duan)主(zhu)電(dian)(dian)(dian)路(lu)的作(zuo)(zuo)用(yong)(yong),其通(tong)斷(duan)(duan)電(dian)(dian)(dian)流較大(da)常(chang)用(yong)(yong)在主(zhu)電(dian)(dian)(dian)路(lu)中,使大(da)功率(lv)負載得電(dian)(dian)(dian)或失電(dian)(dian)(dian)。
4、滅弧裝置不同
接(jie)觸器和繼電(dian)器一個最(zui)重要的區別就是接(jie)觸器都(dou)有滅弧裝置,而繼電(dian)器沒有的。
5、附加產品不同
繼(ji)電(dian)器衍生品(pin)多也就(jiu)是附加(jia)產(chan)品(pin)多,接觸(chu)器比較單一(yi)且(qie)沒有(you)(you)什么額(e)外附加(jia)產(chan)品(pin)。繼(ji)電(dian)器能設(she)計成時間繼(ji)電(dian)器、速度繼(ji)電(dian)器、計數器等,接觸(chu)器就(jiu)沒有(you)(you)。
6、使用不同
接觸器有時可以當繼電(dian)器(qi)使(shi)用,但繼電(dian)器(qi)往往不(bu)能(neng)當接觸器(qi)使(shi)用。