觸點常開常閉要(yao)如何區分？
如何區分常(chang)(chang)開常(chang)(chang)閉觸(chu)點(dian)。繼(ji)電(dian)器其實分為常(chang)(chang)開和常(chang)(chang)閉觸(chu)點(dian)，常(chang)(chang)閉觸(chu)點(dian)就(jiu)是(shi)就(jiu)是(shi)阻值為零時候的兩(liang)端，不(bu)過這個值一般都會(hui)有幾歐姆，可用萬用表來測量，測量電(dian)阻即可。
選(xuan)用(yong)電(dian)流(liu)繼(ji)電(dian)器時(shi)候(hou)(hou)要考慮輸(shu)入的(de)電(dian)壓(ya)是多(duo)少(shao)，電(dian)流(liu)是多(duo)少(shao)，輸(shu)出負(fu)載(zai)有多(duo)大(da)電(dian)流(liu)，峰值電(dian)壓(ya)有多(duo)大(da)，如(ru)下(xia)圖(tu)是直流(liu)輸(shu)入12V控制交流(liu)負(fu)載(zai)，這時(shi)候(hou)(hou)如(ru)果輸(shu)出是220V，一般電(dian)流(liu)選(xuan)用(yong)50%即可(ke)，保(bao)守(shou)一點一點可(ke)以(yi)用(yong)到70%，也就是5A和(he)7A。
電流繼電器觸點(dian)有電常(chang)開變常(chang)閉，沒電常(chang)閉變常(chang)開
電(dian)(dian)(dian)(dian)流繼電(dian)(dian)(dian)(dian)器(qi)(qi)接(jie)通電(dian)(dian)(dian)(dian)源后(hou)，常開(kai)閉(bi)合，常閉(bi)斷開(kai)。而不(bu)是你所說的(de)“只要一直有(you)電(dian)(dian)(dian)(dian)流，電(dian)(dian)(dian)(dian)流繼電(dian)(dian)(dian)(dian)器(qi)(qi)常閉(bi)點(dian)(dian)應該不(bu)會斷開(kai)變成常開(kai)點(dian)(dian)。”常開(kai)和(he)常閉(bi)是指(zhi)電(dian)(dian)(dian)(dian)流繼電(dian)(dian)(dian)(dian)器(qi)(qi)線圈(quan)不(bu)通電(dian)(dian)(dian)(dian)時(shi)(shi)觸(chu)(chu)(chu)(chu)(chu)點(dian)(dian)的(de)狀態。至于常閉(bi)接(jie)成保護(hu)電(dian)(dian)(dian)(dian)路(lu)，比如電(dian)(dian)(dian)(dian)機正(zheng)(zheng)反(fan)轉(zhuan)(zhuan)控(kong)制(zhi)電(dian)(dian)(dian)(dian)路(lu)是不(bu)允許正(zheng)(zheng)轉(zhuan)(zhuan)接(jie)觸(chu)(chu)(chu)(chu)(chu)器(qi)(qi)和(he)反(fan)轉(zhuan)(zhuan)接(jie)觸(chu)(chu)(chu)(chu)(chu)器(qi)(qi)同時(shi)(shi)吸合的(de)情況出現。就要把正(zheng)(zheng)轉(zhuan)(zhuan)接(jie)觸(chu)(chu)(chu)(chu)(chu)器(qi)(qi)的(de)常閉(bi)輔(fu)(fu)助(zhu)觸(chu)(chu)(chu)(chu)(chu)點(dian)(dian)串(chuan)到反(fan)轉(zhuan)(zhuan)接(jie)觸(chu)(chu)(chu)(chu)(chu)器(qi)(qi)線圈(quan)回(hui)路(lu)，把反(fan)轉(zhuan)(zhuan)接(jie)觸(chu)(chu)(chu)(chu)(chu)器(qi)(qi)的(de)常閉(bi)輔(fu)(fu)助(zhu)觸(chu)(chu)(chu)(chu)(chu)點(dian)(dian)串(chuan)到正(zheng)(zheng)轉(zhuan)(zhuan)接(jie)觸(chu)(chu)(chu)(chu)(chu)器(qi)(qi)線圈(quan)回(hui)路(lu)。這(zhe)樣，正(zheng)(zheng)轉(zhuan)(zhuan)接(jie)觸(chu)(chu)(chu)(chu)(chu)器(qi)(qi)吸合時(shi)(shi)常閉(bi)輔(fu)(fu)助(zhu)觸(chu)(chu)(chu)(chu)(chu)點(dian)(dian)斷開(kai)，使反(fan)轉(zhuan)(zhuan)接(jie)觸(chu)(chu)(chu)(chu)(chu)器(qi)(qi)線圈(quan)回(hui)路(lu)開(kai)路(lu)不(bu)能接(jie)通。反(fan)之亦然(ran)。這(zhe)就起到保護(hu)作用。
把正轉接(jie)觸(chu)器(qi)(qi)的常閉(bi)(bi)輔(fu)助(zhu)觸(chu)點串到反轉接(jie)觸(chu)器(qi)(qi)線(xian)圈(quan)回(hui)路，把反轉接(jie)觸(chu)器(qi)(qi)的常閉(bi)(bi)輔(fu)助(zhu)觸(chu)點串到正轉接(jie)觸(chu)器(qi)(qi)線(xian)圈(quan)回(hui)路。這樣(yang)，正轉接(jie)觸(chu)器(qi)(qi)吸(xi)合(he)時常閉(bi)(bi)輔(fu)助(zhu)觸(chu)點斷開，使反轉接(jie)觸(chu)器(qi)(qi)線(xian)圈(quan)回(hui)路開路不能接(jie)通。反之亦(yi)然。這就(jiu)起到保護作用。
