固态继(ji)电器(qi)(qi)这种(zhong)(zhong)工业(ye)上常(chang)见(jian)的(de)一种(zhong)(zhong)电器(qi)(qi)，我们都知道固态继(ji)电器(qi)(qi)是一种(zhong)(zhong)根据特定输入信号而(er)动作的(de)自(zi)动控制电器(qi)(qi)，其种(zhong)(zhong)类(lei)很多，有中间继(ji)电器(qi)(qi)、热继(ji)电器(qi)(qi)、时间继(ji)电器(qi)(qi)等(deng)类(lei)型(xing)。

KM中间继电(dian)器通常用来传递(di)信号(hao)和(he)同时控(kong)(kong)制(zhi)多个电(dian)路，也可(ke)用来直接控(kong)(kong)制(zhi)小(xiao)容(rong)量(liang)电(dian)动机或其他电(dian)气执行(xing)元件。中间继电(dian)器的结构(gou)和(he)工(gong)作原理与交(jiao)流接触(chu)器基本相同，与交(jiao)流接触(chu)器的主要(yao)区(qu)别是触(chu)点(dian)数目多些，且(qie)触(chu)点(dian)容(rong)量(liang)小(xiao)，只允(yun)许通过(guo)小(xiao)电(dian)流。在(zai)选用中间继电(dian)器时，主要(yao)是考虑(lv)电(dian)压等级和(he)触(chu)点(dian)数目。

FR热继电(dian)(dian)(dian)器(qi)下(xia)层金属膨胀系数大，上层的(de)膨胀系数小。当主(zhu)电(dian)(dian)(dian)路(lu)中(zhong)电(dian)(dian)(dian)流超过容许值而使(shi)双金属片(pian)(pian)受热时，双金属片(pian)(pian)的(de)自(zi)由端便向(xiang)上弯曲(qu)超出扣(kou)板(ban)，扣(kou)板(ban)在弹簧(huang)的(de)拉力下(xia)将常闭触点(dian)断(duan)开(kai)(kai)。触点(dian)是接在电(dian)(dian)(dian)动机(ji)的(de)控制电(dian)(dian)(dian)路(lu)中(zhong)的(de)，控制电(dian)(dian)(dian)路(lu)断(duan)开(kai)(kai)便使(shi)接触器(qi)的(de)线(xian)圈断(duan)电(dian)(dian)(dian)，从而断(duan)开(kai)(kai)电(dian)(dian)(dian)动机(ji)的(de)主(zhu)电(dian)(dian)(dian)路(lu)。

KT时(shi)(shi)间(jian)(jian)继(ji)(ji)电(dian)(dian)(dian)器(qi)通(tong)(tong)电(dian)(dian)(dian)延时(shi)(shi)空(kong)(kong)气(qi)式时(shi)(shi)间(jian)(jian)继(ji)(ji)电(dian)(dian)(dian)器(qi)利用空(kong)(kong)气(qi)的(de)阻尼作用达到动(dong)(dong)作延时(shi)(shi)的(de)目的(de)。吸引线圈(quan)通(tong)(tong)电(dian)(dian)(dian)后将衔(xian)铁(tie)(tie)吸下(xia)(xia)，使衔(xian)铁(tie)(tie)与活(huo)塞杆(gan)之间(jian)(jian)有一(yi)段(duan)距离(li)。在释放弹(dan)簧作用下(xia)(xia)，活(huo)塞杆(gan)向下(xia)(xia)移(yi)动(dong)(dong)。在伞形活(huo)塞的(de)表面固(gu)定有一(yi)层橡皮膜(mo)，活(huo)塞向下(xia)(xia)移(yi)动(dong)(dong)时(shi)(shi)，膜(mo)上面会造(zao)成(cheng)空(kong)(kong)气(qi)稀薄(bo)的(de)空(kong)(kong)间(jian)(jian)，活(huo)塞受到下(xia)(xia)面空(kong)(kong)气(qi)的(de)压力，不能(neng)迅速(su)下(xia)(xia)移(yi)。当空(kong)(kong)气(qi)由进(jin)(jin)气(qi)孔进(jin)(jin)入时(shi)(shi)，活(huo)塞才逐渐下(xia)(xia)移(yi)。移(yi)动(dong)(dong)到最(zui)后位置时(shi)(shi)，杠杆(gan)使微动(dong)(dong)开(kai)关(guan)(guan)动(dong)(dong)作。延时(shi)(shi)时(shi)(shi)间(jian)(jian)即为从电(dian)(dian)(dian)磁铁(tie)(tie)吸引线圈(quan)通(tong)(tong)电(dian)(dian)(dian)时(shi)(shi)刻起到微动(dong)(dong)开(kai)关(guan)(guan)动(dong)(dong)作时(shi)(shi)为止的(de)这(zhei)段(duan)时(shi)(shi)间(jian)(jian)。通(tong)(tong)过调节(jie)螺钉调节(jie)进(jin)(jin)气(qi)孔的(de)大小就可调节(jie)延时(shi)(shi)时(shi)(shi)间(jian)(jian)。

吸引线(xian)圈(quan)断电后，依靠复位弹簧的(de)作用而复原。空气(qi)(qi)经出(chu)气(qi)(qi)孔被迅速(su)排出(chu)。此固态继电器有两(liang)个延(yan)时(shi)触(chu)(chu)点：一个是延(yan)时(shi)断开的(de)常(chang)闭(bi)触(chu)(chu)点，—个是延(yan)时(shi)闭(bi)合的(de)常(chang)开触(chu)(chu)点，此外还有两(liang)个瞬动触(chu)(chu)点。