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29.1 部分节选:if the construction is such that the distances could be affected by wear, by! u7 ?+ w" \7 W9 N c
distortion, by movement of the parts or during assembly, the clearances for rated impulse1 [$ F; D( m; y" D. S# b
voltages of 1 500 V and above are increased by 0,5 mm and the impulse voltage test is not; M6 Z( \' @ Q7 D$ D- l
applicable.3 m( ^# h& i5 J6 c0 S
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- g3 h3 M. V1 U9 }- t' C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。
8 |) k c( E) U% y在实际操作中,大家如何定义"距离受磨损、变形、装配等影响".
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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?
9 q$ h0 t! }$ L; B' U注 PCB线路板整体灌胶.& t4 j/ R0 r2 g; `3 }' I1 C
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