|
29.1 部分节选:if the construction is such that the distances could be affected by wear, by
5 P# s, v" k8 G# f$ x9 _. ~distortion, by movement of the parts or during assembly, the clearances for rated impulse) A, {# a: @' D, i) O3 p
voltages of 1 500 V and above are increased by 0,5 mm and the impulse voltage test is not9 K, S- d: p9 {. r* |/ ]" F
applicable.3 V! Q% f- B( j$ d+ e
9 @2 S( d% ?6 L# @% K9 W( N/ Q* y7 |7 m n
( W1 T# v1 p! q; g5 W2 P7 S
* N5 i) |' i7 r& N7 \, z$ u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。- N7 Z/ m* r3 A- ~8 S
在实际操作中,大家如何定义"距离受磨损、变形、装配等影响".
; N. z. }( A7 m& I0 ]+ v( _( h+ a$ }
. \- {( z2 V) X
! R' ?& P$ X2 N( ^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?
+ z3 Z; {% @" {- H注 PCB线路板整体灌胶.
5 f5 Y. _8 c5 Z/ v$ N |
|