用(yong)來保(bao)護線(xian)路和風機的過載及短路。
本(ben)電(dian)(dian)控箱(xiang)電(dian)(dian)源(yuan)為三相(xiang)五線制供電(dian)(dian),三相(xiang)電(dian)(dian)源(yuan)可(ke)上(shang)進(jin),也可(ke)下進(jin)。接(jie)至電(dian)(dian)控箱(xiang)底部的(de)端子排中(zhong),裝設的(de)自動空氣開關QF作(zuo)雙(shuang)速風機短路保護(hu),熱(re)繼電(dian)(dian)器(qi)FR用作(zuo)低速過(guo)載保護(hu)。
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