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引用第3楼特级工程师于2011-02-21 15:54发表的 :
: T. D. U% O, M0 {- Z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?
* h5 m- n* D4 |1 Q(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:
2 _4 P' k- T' a- 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.5 k5 g- u2 ?! V! M0 T
所以是3.0加0.5. 不知是这样否? |
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