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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 :% A/ D6 g- V# n5 |4 O% w! d: J7 a
24.5 As an alternative to the spacing requirements of Table 24.1 or Table 24.2, as appropriate, the' _0 G/ k9 N h3 w K- J: j1 Z) q
spacing requirements in the Standard for Insulation Coordination Including Clearances and Creepage; p% E, F! i+ [$ z
Distances For Electrical Equipment, UL 840, may be used. The spacing requirements of UL 840 shall not7 A3 T! }5 e1 e/ N9 Z; z" o
be used for output wiring terminals and spacings to a dead metal enclosure.6 S, ~7 d6 v, P `9 ?
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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." U/ j' [* G1 i# q6 K' N! _
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251-600(353.6-848.5)基本绝缘距离为6.4mm,加强绝缘还要乘以2.
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4 ^, h N9 L1 q# R如果真要这样的话,Y电容和光耦怎么去满足啊? |
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