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楼主 |
发表于 2011-3-21 14:55
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引用第6楼Liu于2011-03-18 22:01发表的 :; f6 t+ c* n$ i8 j! A, x
24.5 As an alternative to the spacing requirements of Table 24.1 or Table 24.2, as appropriate, the
3 T& v* Q( P9 z) U: X0 e7 _spacing requirements in the Standard for Insulation Coordination Including Clearances and Creepage/ S0 W$ M/ c E
Distances For Electrical Equipment, UL 840, may be used. The spacing requirements of UL 840 shall not
# Q f8 `3 j4 {be used for output wiring terminals and spacings to a dead metal enclosure.$ M. w( @ h, F: ~) r
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谢谢大家的积极帮助,其实我要问的问题就是:给LED模块供电的驱动器(电源),它的间隙和距离是否需要测量变压器两端的工作电压来定距离,还是直接查看额定电压,然后对照UL1310表格24.2电压来判定距离呢?像60950/60065光耦两端和Y电容两端的距离跟变压器两端距离要求都不一样的.
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F! ?& L+ w$ t251-600(353.6-848.5)基本绝缘距离为6.4mm,加强绝缘还要乘以2.: Z% v2 l7 G* H5 T( }5 G0 a4 Q
0 _( Y5 @2 p ?" F" X* }如果真要这样的话,Y电容和光耦怎么去满足啊? |
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