大(da)連變壓(ya)器柜是本公(gong)司產品的其中一種，

而(er)大(da)連(lian)變頻控制箱 它的(de)空氣開(kai)關 一(yi)個(ge)總的(de)空氣開(kai)關，這個(ge)是整個(ge)柜體的(de)電源控制。相信每個(ge)柜子都必須(xu)要有(you)的(de)一(yi)個(ge)東西。 

大連PLC控制柜 這(zhe)個(ge)要根據工(gong)程需要選擇(ze)。打(da)個(ge)比(bi)方(fang)如果工(gong)程小可(ke)以直接就是一個(ge)一體化的(de)PLC但(dan)如果工(gong)程比(bi)較大可(ke)能就需要模(mo)塊、卡件式的(de)，同(tong)時還可(ke)能需要冗余（也就是兩(liang)套(tao)交替使用）。 

電源 ，一個24VDC的開(kai)關電源，大(da)多數(shu)的PLC都是自帶24VDC的電源，根據是否確(que)實需要來定是否要這個開(kai)關電源。 

繼(ji)電(dian)器(qi)(qi) 一般PLC是(shi)(shi)(shi)可(ke)以直接將指令發到(dao)控(kong)制回(hui)路里(li)，但(dan)也可(ke)能先由繼(ji)電(dian)器(qi)(qi)中轉。打個比方，如(ru)果你PLC的輸(shu)出口(kou)帶電(dian)是(shi)(shi)(shi)24VDC的，但(dan)是(shi)(shi)(shi)你的控(kong)制回(hui)路里(li)畫的圖需要(yao)PLC供的節(jie)點(dian)卻是(shi)(shi)(shi)220VAC的，那(nei)么你就必須在PLC輸(shu)出口(kou)加(jia)上一個繼(ji)電(dian)器(qi)(qi)，即指令發出時繼(ji)電(dian)器(qi)(qi)動作，但(dan)后(hou)讓(rang)控(kong)制回(hui)路的節(jie)點(dian)接到(dao)繼(ji)電(dian)器(qi)(qi)的常(chang)開或常(chang)閉(bi)點(dian)上。也是(shi)(shi)(shi)根據情況選擇(ze)是(shi)(shi)(shi)否使用繼(ji)電(dian)器(qi)(qi)。 

1.空氣斷路(lu)器(qi)是一(yi)種不(bu)僅能正(zheng)常(chang)接觸和(he)斷開電(dian)路(lu)，并能在(zai)過電(dian)流、逆電(dian)流、短路(lu)和(he)失（欠）電(dian)壓等非(fei)正(zheng)常(chang)情況下動(dong)作(zuo)的自動(dong)電(dian)器(qi)。其(qi)主要作(zuo)用是保護交、直(zhi)流電(dian)路(lu)內的電(dian)氣設備，也可以不(bu)頻(pin)繁地(di)操作(zuo)電(dian)路(lu)。在(zai)這里用來迅速切斷變頻(pin)器(qi)，防(fang)止變頻(pin)器(qi)及(ji)其(qi)線路(lu)故障導致電(dian)源故障。  

2.交流(liu)電(dian)(dian)抗器(qi)又叫AC電(dian)(dian)抗器(qi)、電(dian)(dian)源(yuan)協調(diao)用的(de)交流(liu)電(dian)(dian)抗器(qi)。其主要功(gong)能(neng)是(shi)防止(zhi)電(dian)(dian)源(yuan)電(dian)(dian)網的(de)諧波干(gan)擾(rao)。 

3.交(jiao)流接觸器簡稱(cheng)接觸器。它是(shi)用來頻繁遠距離(li)接通和分(fen)斷交(jiao)直流電(dian)(dian)路(lu)，或大(da)電(dian)(dian)容控制電(dian)(dian)路(lu)的自動(dong)(dong)(dong)電(dian)(dian)器。這(zhe)里主(zhu)要用于變(bian)頻器出現(xian)故障(zhang)時，自動(dong)(dong)(dong)切斷主(zhu)電(dian)(dian)源并(bing)防止掉電(dian)(dian)及故障(zhang)后再起動(dong)(dong)(dong)。 

大連電氣控制柜的控(kong)(kong)制(zhi)(zhi)(zhi)器(qi)(qi)形狀和尺寸(cun)取決于電(dian)氣(qi)(qi)控(kong)(kong)制(zhi)(zhi)(zhi)柜的控(kong)(kong)制(zhi)(zhi)(zhi)器(qi)(qi)上(shang)手(shou)(shou)或(huo)腳(jiao)使用(yong)部位尺寸(cun)和電(dian)氣(qi)(qi)控(kong)(kong)制(zhi)(zhi)(zhi)柜的控(kong)(kong)制(zhi)(zhi)(zhi)器(qi)(qi)操(cao)作時用(yong)力(li)方(fang)式。手(shou)(shou)用(yong)工具(ju)的設(she)計要使手(shou)(shou)或(huo)腳(jiao)的用(yong)力(li)部位與電(dian)氣(qi)(qi)控(kong)(kong)制(zhi)(zhi)(zhi)柜的控(kong)(kong)制(zhi)(zhi)(zhi)器(qi)(qi)重量分配相互匹配，同時采取一定(ding)的防誤(wu)操(cao)作措施(shi)，如電(dian)氣(qi)(qi)控(kong)(kong)制(zhi)(zhi)(zhi)柜的控(kong)(kong)制(zhi)(zhi)(zhi)器(qi)(qi)表(biao)面防滑、增加(jia)腳(jiao)踏板行程等。