用來保護線路和(he)風機的過載及短(duan)路。
本電(dian)(dian)(dian)控(kong)(kong)箱(xiang)電(dian)(dian)(dian)源(yuan)為三相五線制供電(dian)(dian)(dian),三相電(dian)(dian)(dian)源(yuan)可(ke)(ke)上進(jin),也可(ke)(ke)下進(jin)。接(jie)至電(dian)(dian)(dian)控(kong)(kong)箱(xiang)底部的端子排中,裝設的自動空氣開(kai)關QF作雙速(su)風機短路保護(hu),熱繼(ji)電(dian)(dian)(dian)器FR用(yong)作低速(su)過載保護(hu)。
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