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1. 章节应是4.2.
; r: ~: j9 b. f, T" r2. 如果电气间隙只有0.5mm<3mm,X取0.5mm/3,所以是可以测量.
3 u: u: T: l8 t) E' |3 U3 |( h L3. cl 29.1 of IEC 60335-1有这么一段话:However, if the construction is such that the distances could be affected by wear, by distrotion, by movement of the parts or during assembly, the clearances for rated impulse voltages of 1500V and above are increased by 0,5mm and the impulse voltage test is not applicable.
0 U; S- X; ~* a8 J$ c1 k% R因为实际上你的器具一般会在移动或装配过程中会受到磨损、变形等影响,表16中对应1500V一般应在0,5mm上加0,5mm,即取1mm. |
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