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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 :" l& ?0 M% X m: x' L
24.5 As an alternative to the spacing requirements of Table 24.1 or Table 24.2, as appropriate, the) L! x6 P) X/ P& |. z
spacing requirements in the Standard for Insulation Coordination Including Clearances and Creepage' Y4 V" a$ I6 A. M% ^7 q
Distances For Electrical Equipment, UL 840, may be used. The spacing requirements of UL 840 shall not
% t5 ^8 S7 R1 a0 M! Q+ Z5 C$ U/ |be used for output wiring terminals and spacings to a dead metal enclosure.
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% T2 P0 i: @; [ G, e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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. [* e5 A! k4 g! ^1 m$ ]% f251-600(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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如果真要这样的话,Y电容和光耦怎么去满足啊? |
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