固态(tai)继(ji)电(dian)(dian)器(qi)(qi)(qi)这种工业上常(chang)见的(de)一(yi)(yi)种电(dian)(dian)器(qi)(qi)(qi)，我(wo)们都知道(dao)固态(tai)继(ji)电(dian)(dian)器(qi)(qi)(qi)是一(yi)(yi)种根据特定输入信号而(er)动(dong)作(zuo)的(de)自动(dong)控制电(dian)(dian)器(qi)(qi)(qi)，其(qi)种类(lei)很多，有中(zhong)间继(ji)电(dian)(dian)器(qi)(qi)(qi)、热继(ji)电(dian)(dian)器(qi)(qi)(qi)、时(shi)间继(ji)电(dian)(dian)器(qi)(qi)(qi)等类(lei)型。

KM中(zhong)间(jian)(jian)继(ji)电器(qi)通常用(yong)(yong)来传递(di)信号和同时控制多个电路，也可用(yong)(yong)来直接控制小(xiao)容量(liang)电动(dong)机或(huo)其他(ta)电气(qi)执行(xing)元(yuan)件(jian)。中(zhong)间(jian)(jian)继(ji)电器(qi)的(de)结构和工(gong)作原理与交(jiao)流接触(chu)(chu)器(qi)基本(ben)相同，与交(jiao)流接触(chu)(chu)器(qi)的(de)主(zhu)要(yao)区别是触(chu)(chu)点(dian)数(shu)目多些，且触(chu)(chu)点(dian)容量(liang)小(xiao)，只允许通过(guo)小(xiao)电流。在选(xuan)用(yong)(yong)中(zhong)间(jian)(jian)继(ji)电器(qi)时，主(zhu)要(yao)是考虑电压等(deng)级和触(chu)(chu)点(dian)数(shu)目。

FR热继电(dian)(dian)(dian)器下层金(jin)(jin)属膨胀(zhang)(zhang)系数(shu)大，上层的膨胀(zhang)(zhang)系数(shu)小。当主电(dian)(dian)(dian)路(lu)中电(dian)(dian)(dian)流超过容许值而使(shi)双(shuang)金(jin)(jin)属片受热时，双(shuang)金(jin)(jin)属片的自(zi)由端便(bian)向(xiang)上弯曲超出扣(kou)板，扣(kou)板在(zai)(zai)弹簧的拉力下将常闭触点断(duan)开。触点是(shi)接在(zai)(zai)电(dian)(dian)(dian)动机的控制(zhi)电(dian)(dian)(dian)路(lu)中的，控制(zhi)电(dian)(dian)(dian)路(lu)断(duan)开便(bian)使(shi)接触器的线(xian)圈(quan)断(duan)电(dian)(dian)(dian)，从而断(duan)开电(dian)(dian)(dian)动机的主电(dian)(dian)(dian)路(lu)。

KT时(shi)间(jian)继电器通(tong)电延时(shi)空(kong)(kong)气(qi)(qi)式时(shi)间(jian)继电器利用空(kong)(kong)气(qi)(qi)的(de)阻尼作(zuo)用达到(dao)(dao)动(dong)作(zuo)延时(shi)的(de)目的(de)。吸(xi)引(yin)线圈(quan)通(tong)电后将衔铁(tie)(tie)吸(xi)下(xia)，使(shi)衔铁(tie)(tie)与活(huo)(huo)(huo)(huo)塞(sai)(sai)杆之(zhi)间(jian)有(you)一段距离。在释放弹簧(huang)作(zuo)用下(xia)，活(huo)(huo)(huo)(huo)塞(sai)(sai)杆向(xiang)下(xia)移(yi)(yi)动(dong)。在伞形(xing)活(huo)(huo)(huo)(huo)塞(sai)(sai)的(de)表面固定(ding)有(you)一层橡皮膜(mo)，活(huo)(huo)(huo)(huo)塞(sai)(sai)向(xiang)下(xia)移(yi)(yi)动(dong)时(shi)，膜(mo)上面会造成(cheng)空(kong)(kong)气(qi)(qi)稀薄的(de)空(kong)(kong)间(jian)，活(huo)(huo)(huo)(huo)塞(sai)(sai)受到(dao)(dao)下(xia)面空(kong)(kong)气(qi)(qi)的(de)压力，不(bu)能(neng)迅速下(xia)移(yi)(yi)。当(dang)空(kong)(kong)气(qi)(qi)由(you)进(jin)气(qi)(qi)孔(kong)进(jin)入时(shi)，活(huo)(huo)(huo)(huo)塞(sai)(sai)才逐渐下(xia)移(yi)(yi)。移(yi)(yi)动(dong)到(dao)(dao)最后位置(zhi)时(shi)，杠杆使(shi)微动(dong)开(kai)关动(dong)作(zuo)。延时(shi)时(shi)间(jian)即为从(cong)电磁铁(tie)(tie)吸(xi)引(yin)线圈(quan)通(tong)电时(shi)刻起到(dao)(dao)微动(dong)开(kai)关动(dong)作(zuo)时(shi)为止的(de)这段时(shi)间(jian)。通(tong)过(guo)调(diao)节(jie)螺钉调(diao)节(jie)进(jin)气(qi)(qi)孔(kong)的(de)大小就可调(diao)节(jie)延时(shi)时(shi)间(jian)。

吸引线圈断电后，依靠复位(wei)弹簧的作用(yong)而复原。空气经出气孔被迅速排出。此固态(tai)继(ji)电器有两(liang)个(ge)延(yan)(yan)时(shi)触点：一个(ge)是延(yan)(yan)时(shi)断开的常(chang)闭(bi)触点，—个(ge)是延(yan)(yan)时(shi)闭(bi)合的常(chang)开触点，此外(wai)还有两(liang)个(ge)瞬动(dong)触点。