德(de)國賀德(de)克(ke)HYDAC產品(pin)的應用(yong)范圍十分廣(guang)泛，幾乎覆蓋各行各業，尤(you)其在(zai)冶(ye)金工(gong)業、汽車工(gong)業、電力設(she)備、化(hua)工(gong)、工(gong)程機械、造紙工(gong)業、造船工(gong)業以及機床制造等領域都得到廣(guang)泛應用(yong)。

繼電(dian)器(qi)目前已廣(guang)泛應用(yong)(yong)于計(ji)算機外圍接口設備、恒(heng)溫(wen)系(xi)統(tong)(tong)、調(diao)溫(wen)、電(dian)爐加(jia)溫(wen)控(kong)制(zhi)、電(dian)機控(kong)制(zhi)、數控(kong)機械，遙(yao)控(kong)系(xi)統(tong)(tong)、工業自動化裝(zhuang)置；信號燈(deng)、調(diao)光(guang)、閃(shan)爍器(qi)、照明舞臺燈(deng)光(guang)控(kong)制(zhi)系(xi)統(tong)(tong)；儀(yi)器(qi)儀(yi)表、醫療器(qi)械、復印機、自動洗(xi)衣機；自動消防(fang)(fang)，保(bao)安系(xi)統(tong)(tong)，以(yi)及作為電(dian)網功率(lv)因素補償的電(dian)力電(dian)容的切換開(kai)關等等，另外在(zai)化工、煤礦等需防(fang)(fang)爆、防(fang)(fang)潮、防(fang)(fang)腐(fu)蝕場合中都有大(da)量(liang)使用(yong)(yong)。

繼電器的技術參數：

①額定(ding)工作電(dian)(dian)(dian)壓(ya)：是(shi)指繼電(dian)(dian)(dian)器正常工作時(shi)線圈所需要的電(dian)(dian)(dian)壓(ya)。根據繼電(dian)(dian)(dian)器的型號不同可以是(shi)交流(liu)電(dian)(dian)(dian)壓(ya)，也可以是(shi)直流(liu)電(dian)(dian)(dian)壓(ya)。 

②直流(liu)電(dian)阻：是(shi)指繼電(dian)器中線圈的直流(liu)電(dian)阻，可以通(tong)過萬用表測量(liang)。

③吸(xi)合電(dian)(dian)流(liu)：是(shi)指繼電(dian)(dian)器能(neng)夠產生吸(xi)合動(dong)作(zuo)的最小電(dian)(dian)流(liu)。在正常使(shi)用(yong)時，給(gei)定(ding)(ding)的電(dian)(dian)流(liu)必須略大于吸(xi)合電(dian)(dian)流(liu)，這(zhe)樣繼電(dian)(dian)器才能(neng)穩定(ding)(ding)地工作(zuo)。而對于線(xian)圈所(suo)加的工作(zuo)電(dian)(dian)壓(ya)，一(yi)般(ban)不要超過額定(ding)(ding)工作(zuo)電(dian)(dian)壓(ya)的1.5倍，否則會產生較大的電(dian)(dian)流(liu)而把(ba)線(xian)圈燒毀(hui)。 

④釋放(fang)電(dian)(dian)流(liu)(liu)：是指繼(ji)電(dian)(dian)器(qi)產生釋放(fang)動(dong)作的(de)(de)最大電(dian)(dian)流(liu)(liu)。當繼(ji)電(dian)(dian)器(qi)吸合(he)狀(zhuang)(zhuang)態(tai)的(de)(de)電(dian)(dian)流(liu)(liu)減小(xiao)到定程度(du)時(shi)，繼(ji)電(dian)(dian)器(qi)就會恢復到未通(tong)電(dian)(dian)的(de)(de)釋放(fang)狀(zhuang)(zhuang)態(tai)，這時(shi)的(de)(de)電(dian)(dian)流(liu)(liu)遠遠小(xiao)于吸合(he)電(dian)(dian)流(liu)(liu)。

⑤觸點切換電(dian)(dian)(dian)壓(ya)(ya)和(he)電(dian)(dian)(dian)流：是指繼(ji)電(dian)(dian)(dian)器(qi)允許加載的電(dian)(dian)(dian)壓(ya)(ya)和(he)電(dian)(dian)(dian)流。它決定了繼(ji)電(dian)(dian)(dian)器(qi)能控制(zhi)電(dian)(dian)(dian)壓(ya)(ya)和(he)電(dian)(dian)(dian)流的大小，使(shi)用時(shi)不能超過此值，否則(ze)很(hen)容(rong)易損壞(huai)繼(ji)電(dian)(dian)(dian)器(qi)的觸點。