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29.1 部分节选:if the construction is such that the distances could be affected by wear, by0 }- D9 M8 Q7 w2 z* r D" I
distortion, by movement of the parts or during assembly, the clearances for rated impulse( D" e, U4 K1 B! Z6 S1 v
voltages of 1 500 V and above are increased by 0,5 mm and the impulse voltage test is not
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7 q6 a9 ~2 O+ f! J z$ U/ 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。1 ]4 G- z- }3 [4 ?
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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0 `+ M: }* E7 Q$ A) I2 w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?/ @3 `) g0 u! B7 S+ R
注 PCB线路板整体灌胶.& e3 K m9 \9 B1 c- D+ ^
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