【填空题】
熔断器串入被保护电路中，能在电路发生___或严重___时自动熔断。从而切断___，起到保护作用。
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答案
短路|过负荷|电源
解析
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【填空题】
规程规定母线着色的颜色标准为：1.直流母线的正极涂___色，负极涂___色。2.交流母线的U相涂___色、V相涂___色、W相涂___色。3.中性线不接地涂___色、接地涂___色。
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