题目内容
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[判断题]
总配电箱中漏电保护器的额定漏电动作电流应大于30m对,额定漏电动作时间应大于0.1s,但其额定漏电动作电流与额定漏电动作时间的乘积不应大于30m对•s。()
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总配电箱中漏电保护器的额定漏电动作电流应大于15mA,额定漏电动作时间应大于0.1s。()
A.0.1
B.0.2
C.0.3
D.0.4
A.0.1
B.0.2
C.0.3
D.0.4
A.0.1
B.0.2
C.0.3
D.0.4
A.30mA、0.1s、30mA、0.1s、30mA
B.35mA、0.1s、30mA、0.1s、40mA
C.30mA、0.1s、30mA、0.1s、40mA
D.35mA、0.1s、35mA、0.1s、40mA
A.IΔ>30mA,TΔ=0.1s
B.IΔ=30mA,TΔ>0.1s
C.IΔ>30mA,TΔ>0.1s,IΔ•TΔ≯30mA •0.1s
D.IΔ>30mA,TΔ>0.1s
A.IΔ大于30mA,TΔ=0.1s
B.IΔ=30mA,TΔ 大于0.1s
C.IΔ大于30mA,TΔ大于0.1s
D.IΔ大于30mA,TΔ大于0.1s,IΔ·TΔ≯30mA ·0.1s
A.总配电箱中漏保的额定动作电流应大于30mA,额定漏电动作时间应大于0.1s,但其乘机不应大于30mA·s
B.总配电箱中漏保的额定动作电流应小于30mA,额定漏电动作时间应大于0.1s,但其乘机不应大于30mA·s
C.现场用电必须采用TN-S系统,符合三级配电两级保护
D.施工现场开关箱与用电设备距离不应大于30m