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29.1 部分节选:if the construction is such that the distances could be affected by wear, by9 R0 H* C2 D# A8 A, W' [
distortion, by movement of the parts or during assembly, the clearances for rated impulse( m! N, ]0 E) d( t! |1 m3 ?' |
voltages of 1 500 V and above are increased by 0,5 mm and the impulse voltage test is not9 v/ E* C) P9 j8 D; |
applicable.
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" B5 \0 g9 f x% P2 }. q' y p标准中说假如距离受磨损、变形、装配等影响时,1500V脉冲电压或以上所对应的电气间隙需要增加0.5mm。" s3 T$ }6 X4 R8 l7 @4 L
在实际操作中,大家如何定义"距离受磨损、变形、装配等影响".% s5 j. g$ \1 k. ]8 [6 p
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7 ~. C2 G" a8 W3 I目前由于是宁可杀错不放过的态势,脉冲电压1500V以上都增加了0.5mm,我想听听大家是怎么操作的?
x4 e+ c2 n% e! T x X注 PCB线路板整体灌胶.& }) ~9 C+ T8 v
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