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29.1 部分节选:if the construction is such that the distances could be affected by wear, by
+ }; G' \0 _. b% E" Ldistortion, by movement of the parts or during assembly, the clearances for rated impulse, p) ^4 t8 N3 X' I) T; G% B" _- G6 W
voltages of 1 500 V and above are increased by 0,5 mm and the impulse voltage test is not$ p5 K+ j' v L9 `9 c
applicable.
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9 b5 @9 p# z; s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。
& v6 K# I$ b7 W+ u9 v在实际操作中,大家如何定义"距离受磨损、变形、装配等影响".+ J0 s K0 F1 f
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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?
! F: M; Q( b' Y7 l注 PCB线路板整体灌胶.
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