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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 :
$ A0 w0 b/ W4 s0 [24.5 As an alternative to the spacing requirements of Table 24.1 or Table 24.2, as appropriate, the0 R* ~7 `2 z- N/ t& |: S7 h
spacing requirements in the Standard for Insulation Coordination Including Clearances and Creepage: U4 W- @$ u( m' u# I, ^$ }" I
Distances For Electrical Equipment, UL 840, may be used. The spacing requirements of UL 840 shall not
~* c/ c& L! V: ~, a, c$ Lbe used for output wiring terminals and spacings to a dead metal enclosure.
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$ i; `. O( @. W0 ^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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( m5 M2 ~* S: [% t3 E" t E251-600(353.6-848.5)基本绝缘距离为6.4mm,加强绝缘还要乘以2.9 d, U5 p4 t3 e& X& n9 W' _
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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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