用來保護線路和風(feng)機的過載及(ji)短(duan)路。
本電(dian)(dian)控箱(xiang)電(dian)(dian)源(yuan)為三相(xiang)五線制供(gong)電(dian)(dian),三相(xiang)電(dian)(dian)源(yuan)可上進,也(ye)可下進。接至(zhi)電(dian)(dian)控箱(xiang)底(di)部的(de)端子排中,裝設(she)的(de)自動空氣開關(guan)QF作雙(shuang)速(su)風(feng)機短路保(bao)護(hu),熱繼(ji)電(dian)(dian)器(qi)FR用作低速(su)過載保(bao)護(hu)。
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