真空(kong)接(jie)触(chu)器(qi)利(li)用(yong)(yong)真空(kong)灭(mie)弧室(shi)灭(mie)弧，用(yong)(yong)以频繁接(jie)通和切断正常工作(zuo)电流，在(zai)电机中有(you)(you)着广泛(fan)的(de)应用(yong)(yong)。用(yong)(yong)户在(zai)使用(yong)(yong)真空(kong)接(jie)触(chu)器(qi)时首先需要(yao)了(le)解的(de)知(zhi)识就是真空(kong)接(jie)触(chu)器(qi)的(de)原理(li)了(le)，这(zhei)对于用(yong)(yong)户的(de)使用(yong)(yong)有(you)(you)很大的(de)好处。
工作原理
真空(kong)接(jie)触器通常(chang)由绝缘隔电(dian)(dian)(dian)框(kuang)架、金属底座、传(chuan)动(dong)拐臂、电(dian)(dian)(dian)磁系统、辅助开关和真空(kong)开关管(guan)等部(bu)件组成。当电(dian)(dian)(dian)磁线(xian)圈(quan)通过控(kong)制电(dian)(dian)(dian)压时，衔(xian)铁带动(dong)拐臂转动(dong)，使(shi)真空(kong)开关管(guan)内(nei)主触头(tou)接(jie)通，电(dian)(dian)(dian)磁线(xian)圈(quan)断电(dian)(dian)(dian)后(hou)，由于分闸(zha)弹簧(huang)作用，使(shi)主触头(tou)分断。
真(zhen)(zhen)空开关(guan)(guan)(guan)管(guan)(guan)(guan)(guan)是以上封盖、下封盖、金属波(bo)纹(wen)管(guan)(guan)(guan)(guan)和(he)陶瓷管(guan)(guan)(guan)(guan)等组(zu)成，该(gai)真(zhen)(zhen)空开关(guan)(guan)(guan)管(guan)(guan)(guan)(guan)，外壳采(cai)用(yong)95瓷绝缘材(cai)料制成波(bo)纹(wen)式的(de)瓷管(guan)(guan)(guan)(guan)，它具有爬电距离(li)大、机(ji)械强度(du)高、耐热和(he)耐冲击的(de)特(te)点。真(zhen)(zhen)空开关(guan)(guan)(guan)管(guan)(guan)(guan)(guan)内封装一对(dui)动(dong)(dong)静触头(tou)，触头(tou)材(cai)料采(cai)用(yong)耐磨且低(di)截流值的(de)Cu-W-Wc，这样在满足开断性能的(de)条件(jian)下，减小开断过(guo)程(cheng)中由于(yu)截流引起的(de)过(guo)电压(ya)，提(ti)高了真(zhen)(zhen)空开关(guan)(guan)(guan)管(guan)(guan)(guan)(guan)的(de)使用(yong)电寿(shou)命(ming)。当金属波(bo)纹(wen)管(guan)(guan)(guan)(guan)轴(zhou)向运动(dong)(dong)时带(dai)动(dong)(dong)动(dong)(dong)触头(tou)做分合闸动(dong)(dong)作。
电(dian)磁(ci)系统考虑实际吸力(li)特(te)性和反(fan)力(li)特(te)性良(liang)好配(pei)合，以及发(fa)挥接触(chu)器运(yun)行时噪音低、节电(dian)的优点，采(cai)用滞留双线圈(quan)由起动(dong)和维持两绕组组成，通过辅助开关切换，为了便于用户进(jin)行交流电(dian)源(yuan)操作，接触(chu)器带(dai)有桥(qiao)式整(zheng)流装(zhuang)置。
机(ji)械锁(suo)(suo)扣(kou)：当闭(bi)合线圈(quan)通电(dian)时(shi)，接触(chu)(chu)器吸合，机(ji)械锁(suo)(suo)扣(kou)锁(suo)(suo)住(zhu)：当脱扣(kou)线圈(quan)通电(dian)时(shi)，机(ji)械锁(suo)(suo)扣(kou)脱扣(kou)，接触(chu)(chu)器释放，脱扣(kou)线圈(quan)在(zai)热(re)态时(shi)，其电(dian)压在(zai)Us85%-110%范围内使接触(chu)(chu)器可靠(kao)释放。
