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1. 激光加工(gong)設(she)備(bei)的電流(liu)繼電器

根據輸(shu)入(線(xian)圈)電(dian)(dian)(dian)流(liu)大小而動作的(de)(de)(de)激(ji)光加工設(she)備的(de)(de)(de)繼(ji)(ji)電(dian)(dian)(dian)器(qi)稱(cheng)為電(dian)(dian)(dian)流(liu)繼(ji)(ji)電(dian)(dian)(dian)器(qi)。電(dian)(dian)(dian)流(liu)繼(ji)(ji)電(dian)(dian)(dian)器(qi)線(xian)圈串聯(lian)接入主電(dian)(dian)(dian)路，用來感(gan)測主電(dian)(dian)(dian)路的(de)(de)(de)線(xian)路電(dian)(dian)(dian)流(liu)，觸頭接于控制電(dian)(dian)(dian)路，為執行元件。電(dian)(dian)(dian)流(liu)繼(ji)(ji)電(dian)(dian)(dian)器(qi)反(fan)映的(de)(de)(de)是(shi)電(dian)(dian)(dian)流(liu)信號(hao)，常用的(de)(de)(de)電(dian)(dian)(dian)流(liu)繼(ji)(ji)電(dian)(dian)(dian)器(qi)有過電(dian)(dian)(dian)流(liu)繼(ji)(ji)電(dian)(dian)(dian)器(qi)和欠電(dian)(dian)(dian)流(liu)繼(ji)(ji)電(dian)(dian)(dian)器(qi)。

(1)過(guo)電(dian)(dian)流繼(ji)電(dian)(dian)器(qi)的任(ren)務(wu)是當電(dian)(dian)路(lu)發生短路(lu)及過(guo)流時立即(ji)將(jiang)電(dian)(dian)路(lu)切(qie)斷，因此過(guo)電(dian)(dian)流繼(ji)電(dian)(dian)器(qi)線圈通(tong)過(guo)小于整定(ding)電(dian)(dian)流時不動(dong)作，只有超過(guo)整定(ding)電(dian)(dian)流時才動(dong)作。

(2)欠電(dian)(dian)流(liu)(liu)繼(ji)電(dian)(dian)器(qi)(qi)的(de)任務(wu)是當(dang)電(dian)(dian)路(lu)電(dian)(dian)流(liu)(liu)過(guo)低時立即將電(dian)(dian)路(lu)切斷，因此欠電(dian)(dian)流(liu)(liu)繼(ji)電(dian)(dian)器(qi)(qi)線圈通過(guo)的(de)電(dian)(dian)流(liu)(liu)大于或(huo)等于整定電(dian)(dian)流(liu)(liu)時，繼(ji)電(dian)(dian)器(qi)(qi)吸(xi)合，只有當(dang)電(dian)(dian)流(liu)(liu)低于整定電(dian)(dian)流(liu)(liu)時，繼(ji)電(dian)(dian)器(qi)(qi)才釋(shi)放。

2.激光加工設備(bei)的電(dian)壓繼電(dian)器(qi)

激光加(jia)工設(she)備的電(dian)(dian)(dian)壓(ya)繼(ji)電(dian)(dian)(dian)器(qi)(qi)(qi)(qi)是根據輸入電(dian)(dian)(dian)壓(ya)大小而動(dong)作的繼(ji)電(dian)(dian)(dian)器(qi)(qi)(qi)(qi)。電(dian)(dian)(dian)壓(ya)繼(ji)電(dian)(dian)(dian)器(qi)(qi)(qi)(qi)線圈并聯接(jie)入主電(dian)(dian)(dian)路(lu)，用來感測主電(dian)(dian)(dian)路(lu)的線路(lu)電(dian)(dian)(dian)壓(ya)，觸頭接(jie)于控(kong)制電(dian)(dian)(dian)路(lu)，為執(zhi)行(xing)元件(jian)。電(dian)(dian)(dian)壓(ya)繼(ji)電(dian)(dian)(dian)器(qi)(qi)(qi)(qi)也可(ke)分為過電(dian)(dian)(dian)壓(ya)繼(ji)電(dian)(dian)(dian)器(qi)(qi)(qi)(qi)和欠電(dian)(dian)(dian)壓(ya)繼(ji)電(dian)(dian)(dian)器(qi)(qi)(qi)(qi)。

(1)過電(dian)(dian)(dian)壓繼電(dian)(dian)(dian)器(qi)用于線(xian)路的過電(dian)(dian)(dian)壓保護(hu)(hu)，動(dong)作(zuo)(zuo)電(dian)(dian)(dian)壓整定范圍為(wei)(百(bai)分(fen)之(zhi)一百(bai)零五~百(bai)分(fen)之(zhi)一百(bai)二十)Un。當被保護(hu)(hu)的線(xian)路電(dian)(dian)(dian)壓正常時，銜(xian)(xian)鐵(tie)不動(dong)作(zuo)(zuo);當被保護(hu)(hu)的線(xian)路電(dian)(dian)(dian)壓高(gao)于額定值，達到(dao)過電(dian)(dian)(dian)壓繼電(dian)(dian)(dian)器(qi)的整定值時，銜(xian)(xian)鐵(tie)動(dong)作(zuo)(zuo)，觸頭(tou)機構動(dong)作(zuo)(zuo)。

(2)欠電(dian)壓(ya)繼電(dian)器用于線路的(de)欠電(dian)壓(ya)保(bao)護，釋放電(dian)壓(ya)整(zheng)定(ding)范圍為(wei)(百分之七~ 百分之二十) u當(dang)被保(bao)護的(de)線路電(dian)壓(ya)正(zheng)常時，銜鐵可靠吸合(he);當(dang)被保(bao)護的(de)線路電(dian)壓(ya)降至欠電(dian)壓(ya)繼電(dian)器的(de)釋加整(zheng)定(ding)值時，銜鐵釋放，觸(chu)頭機(ji)(ji)構復位;當(dang)被保(bao)護的(de)線路電(dian)壓(ya)高于額定(ding)值，達到過(guo)電(dian)壓(ya)繼電(dian)器的(de)整(zheng)定(ding)值時，銜鐵動(dong)作，觸(chu)頭機(ji)(ji)構動(dong)作。