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引用第3楼特级工程师于2011-02-21 15:54发表的 :& s" j0 N3 n, @! x9 w; E3 d/ S( f9 B
山炮什么都不懂,怎会出题?那我出一道题吧:GB4706.1问题,山炮查阅一份3C报告时发现:加强绝缘的电气间隙要求是3.5mm,为什么?
& |4 {& l- n" K(请将答案的威望限制设为50,答中重赏,答错也赏) 用IEC的话来回答:
8 V9 ]5 Z8 h$ X& W* Cif the construction is such that the distances could be affected by wear, by distortion, by movement of the parts or during assembly, the clearances for rated impulse voltages of 1 500 V and above are increased by 0,5 mm and the impulse voltage test is not applicable.7 F4 A) j5 q V; i5 C
所以是3.0加0.5. 不知是这样否? |
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