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引用第3楼特级工程师于2011-02-21 15:54发表的 :9 t3 J$ i# h5 P! i+ N$ i
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?; F4 o g# d. i# `0 Q& F
(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:0 O( T) u4 A7 T% o) i! N
if 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.
' N9 D2 H9 B+ u, G9 E: _所以是3.0加0.5. 不知是这样否? |
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