A.操作和保護(hù)設(shè)備采用空氣開(kāi)關(guān)或刀開(kāi)關(guān)和熔斷器 B.屏內(nèi)母線可用銅的裸母線 C.直流系統(tǒng)能承受5~10kA的短路電流 D.每段直流母線上均設(shè)絕緣監(jiān)察和電壓監(jiān)察裝置
A.3 B.2 C.1 D.0.5
A.102~104,51~52 B.104~107,52~53 C.106~108,52~54 D.108~110,54~55