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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 :8 U6 k+ W; | e y3 J, k
24.5 As an alternative to the spacing requirements of Table 24.1 or Table 24.2, as appropriate, the, f! l" o" M, Q/ M# H5 X
spacing requirements in the Standard for Insulation Coordination Including Clearances and Creepage
# P! z# o6 L& L: JDistances For Electrical Equipment, UL 840, may be used. The spacing requirements of UL 840 shall not/ `, m: s1 X/ }; o! ]& M9 [
be used for output wiring terminals and spacings to a dead metal enclosure.( b( i, Z, Z7 d. Y/ N7 f
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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.9 E+ ^& H: }) Z
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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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如果真要这样的话,Y电容和光耦怎么去满足啊? |
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