變頻螺(luo)桿式冷水機(ji)運(yun)行(xing)前(qian)(qian)的(de)(de)檢(jian)查(cha)(cha)(cha)項(xiang)目，電(dian)源(yuan)及(ji)電(dian)控儀表系統(tong)的(de)(de)檢(jian)查(cha)(cha)(cha)。開(kai)機(ji)前(qian)(qian)檢(jian)查(cha)(cha)(cha)配電(dian)容(rong)量是(shi)否(fou)(fou)(fou)(fou)與(yu)機(ji)組(zu)功率一(yi)致，選(xuan)擇(ze)的(de)(de)電(dian)纜(lan)線(xian)(xian)徑是(shi)否(fou)(fou)(fou)(fou)能承受主(zhu)機(ji)的(de)(de)大工作電(dian)流。檢(jian)查(cha)(cha)(cha)電(dian)氣(qi)(qi)系統(tong)是(shi)否(fou)(fou)(fou)(fou)與(yu)機(ji)組(zu)一(yi)致。機(ji)組(zu)電(dian)氣(qi)(qi)系統(tong)為三(san)相五線(xian)(xian)制（三(san)相線(xian)(xian)，一(yi)根零線(xian)(xian)，一(yi)根地線(xian)(xian)，380V±10%）。檢(jian)查(cha)(cha)(cha)壓(ya)縮(suo)(suo)機(ji)電(dian)源(yuan)線(xian)(xian)是(shi)否(fou)(fou)(fou)(fou)連接(jie)(jie)良好。如果松動，請(qing)重新擰緊。壓(ya)縮(suo)(suo)機(ji)接(jie)(jie)線(xian)(xian)處使用的(de)(de)扭(niu)矩為500kg cm。由于主(zhu)機(ji)的(de)(de)長途運(yun)輸和吊裝，螺(luo)釘可(ke)能會松動。否(fou)(fou)(fou)(fou)則可(ke)能會損壞主(zhu)機(ji)控制柜和壓(ya)縮(suo)(suo)機(ji)內的(de)(de)電(dian)氣(qi)(qi)元件（如空氣(qi)(qi)開(kai)關(guan)、交流接(jie)(jie)觸(chu)器等）。用萬用表仔細檢(jian)查(cha)(cha)(cha)所有(you)電(dian)路(lu)，看(kan)接(jie)(jie)線(xian)(xian)是(shi)否(fou)(fou)(fou)(fou)正確(que)；用兆歐測量，確(que)保外殼沒有(you)短路(lu)；檢(jian)查(cha)(cha)(cha)接(jie)(jie)地線(xian)(xian)是(shi)否(fou)(fou)(fou)(fou)正確(que)安(an)裝，對地絕緣(yuan)電(dian)阻(zu)是(shi)否(fou)(fou)(fou)(fou)大于2MΩ；檢(jian)查(cha)(cha)(cha)電(dian)源(yuan)線(xian)(xian)是(shi)否(fou)(fou)(fou)(fou)滿足(zu)容(rong)量要求(qiu)。檢(jian)查(cha)(cha)(cha)是(shi)否(fou)(fou)(fou)(fou)在設備的(de)(de)電(dian)源(yuan)線(xian)(xian)上安(an)裝了斷路(lu)器。

    控(kong)(kong)(kong)制(zhi)(zhi)(zhi)柜內主電(dian)(dian)路的所有接線(xian)(xian)和控(kong)(kong)(kong)制(zhi)(zhi)(zhi)電(dian)(dian)路的外(wai)部接線(xian)(xian)在(zai)通(tong)電(dian)(dian)前(qian)都應對照接線(xian)(xian)圖進行全面檢(jian)(jian)查(cha)（如曲(qu)軸箱油加(jia)熱(re)器接線(xian)(xian)、壓縮機電(dian)(dian)子保(bao)(bao)護(hu)器、循(xun)環(huan)水(shui)溫度傳感(gan)器、目(mu)標(biao)流量開關(guan)(guan)、水(shui)泵(beng)聯合(he)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)等）；檢(jian)(jian)查(cha)端子螺栓(shuan)是(shi)否(fou)緊固(gu)無松動(dong)。檢(jian)(jian)查(cha)電(dian)(dian)控(kong)(kong)(kong)儀表(biao)、電(dian)(dian)器是(shi)否(fou)安裝(zhuang)正確(que)、完整(zheng)、有效，電(dian)(dian)控(kong)(kong)(kong)柜內外(wai)，特別是(shi)各(ge)點接線(xian)(xian)口(kou)是(shi)否(fou)清潔、無雜(za)物。檢(jian)(jian)查(cha)以上各(ge)項后，當控(kong)(kong)(kong)制(zhi)(zhi)(zhi)柜通(tong)電(dian)(dian)時，電(dian)(dian)源指示燈亮。這時，油加(jia)熱(re)器開始工作。觀察相序保(bao)(bao)護(hu)器是(shi)否(fou)正常(chang)。如果相序保(bao)(bao)護(hu)器正常(chang)（綠燈亮），閉合(he)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)柜內的單*開關(guan)(guan)（QF2），控(kong)(kong)(kong)制(zhi)(zhi)(zhi)電(dian)(dian)路開始工作。觸(chu)摸屏（文字顯示）和PLC控(kong)(kong)(kong)制(zhi)(zhi)(zhi)器全部投入運行。