如何挑選(xuan)合(he)適(shi)的繼電器 繼電器選(xuan)購指南(nan)

選(xuan)購(gou)(gou)好(hao)(hao)的繼(ji)(ji)電(dian)(dian)(dian)器(qi)(qi)需(xu)求留意(yi)事項(xiang)。繼(ji)(ji)電(dian)(dian)(dian)器(qi)(qi)線(xian)圈(quan)(quan)在(zai)電(dian)(dian)(dian)路中用一個(ge)長(chang)方(fang)框符(fu)(fu)號表示，假如繼(ji)(ji)電(dian)(dian)(dian)器(qi)(qi)有兩個(ge)圈(quan)(quan)，就畫兩個(ge)并列的長(chang)方(fang)框。同時在(zai)長(chang)方(fang)框內或長(chang)方(fang)框旁(pang)標上繼(ji)(ji)電(dian)(dian)(dian)器(qi)(qi)的文字符(fu)(fu)號“J”。選(xuan)購(gou)(gou)好(hao)(hao)的繼(ji)(ji)電(dian)(dian)(dian)器(qi)(qi)需(xu)求留意(yi)事項(xiang)有哪些？

1、選擇電磁式繼電器接點類型及接點負荷：

同一種(zhong)型號的繼(ji)電器通常有多種(zhong)接(jie)點的方(fang)式可供(gong)選(xuan)用（電磁繼(ji)電器有：單組(zu)接(jie)點、雙組(zu)接(jie)點、多組(zu)接(jie)點及常開式接(jie)點、常閉式接(jie)點等），應(ying)選(xuan)用合適應(ying)用電路的接(jie)點類型。

2、選擇電磁式繼電器線圈的額定工作電流：

用(yong)晶體管或集成(cheng)電(dian)(dian)(dian)路(lu)驅動的直流(liu)(liu)電(dian)(dian)(dian)磁繼(ji)電(dian)(dian)(dian)器，其(qi)線(xian)圈額定工作電(dian)(dian)(dian)流(liu)(liu)（普(pu)通為吸(xi)合電(dian)(dian)(dian)流(liu)(liu)的2倍）在驅動電(dian)(dian)(dian)路(lu)的輸出電(dian)(dian)(dian)流(liu)(liu)范圍之內。

3、選擇電磁式繼電器適宜的體積：

繼電(dian)器(qi)體積的(de)(de)大小通常與(yu)繼電(dian)器(qi)接點負荷的(de)(de)大小有(you)關(guan)，選用(yong)多大致積的(de)(de)繼電(dian)器(qi)，還(huan)應依據應用(yong)電(dian)路的(de)(de)請(qing)求而定。

4、選擇電磁式繼電器線圈電源電壓：

選用電磁式繼電器時，首先應選擇繼電器線圈電(dian)(dian)(dian)源電(dian)(dian)(dian)壓是交流還是直流。繼(ji)電(dian)(dian)(dian)器的額定工(gong)(gong)作(zuo)電(dian)(dian)(dian)壓普通應小于(yu)或等于(yu)其控制電(dian)(dian)(dian)路的工(gong)(gong)作(zuo)電(dian)(dian)(dian)壓。