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标题: UL1993 对于PCB的间隙要求 [打印本页]
作者: jsspace    时间: 2011-6-16 14:07
标题: UL1993 对于PCB的间隙要求
UL1993对于PCB的间隙没有要求，满足耐压测试即可？
作者: babyliss    时间: 2011-6-16 14:49
有呀9 i" T* q/ f  i! z
in primary circuits,1.5mm minimum spacing are maintained through air and 3.0mm minimum spacing are maintained over surfaces between the current-acrrying parts of opposite polarity on PCB of power unit.And 1.2mm minimum spacing are maintained through air and over surfaces of insulating material between current-carrying parts of opposite polarity and between such current-acrrying parts and dead-metal prats or low voltage isolated circuits.
作者: jsspace    时间: 2011-6-16 15:58
引用第1楼babyliss于2011-06-16 14:49发表的  :
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in primary circuits,1.5mm minimum spacing are maintained through air and 3.0mm minimum spacing are maintained over surfaces between the current-acrrying parts of opposite polarity on PCB of power unit.And 1.2mm minimum spacing are maintained through air and over surfaces of insulating material between current-carrying parts of opposite polarity and between such current-acrrying parts and dead-metal prats or low voltage isolated circuits.
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是啊，我就觉得奇怪啊，我是在以份培训资料里看到说满足耐压就可以了
作者: shideyuan    时间: 2011-6-21 11:03
有要求，电气间隙，和爬电距离都有要求，不只是满足耐压
作者: ethan    时间: 2011-9-24 23:08
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作者: ethan    时间: 2011-9-24 23:11
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作者: hzj101988    时间: 2013-5-23 17:27
babyliss 发表于 2011-6-16 14:49
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in primary circuits,1.5mm minimum spacing are maintained through air and 3.0mm minimum spacing  ...
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这个是哪个标准的啊
作者: jsspace    时间: 2013-5-23 22:08
hzj101988 发表于 2013-5-23 17:27 3 M$ K" ^! n2 f# b* H
这个是哪个标准的啊

  G( B  }% `2 _9 G7 f1 {' G% }服了你，这个也被你翻出来了
& @! v  m4 V0 E. q7 f. m- Q9 qLED灯泡的PCB没有距离要求，满足耐压即可
作者: zhangtaooo    时间: 2013-5-24 08:39
UL 1993 8 k1 y$ D& Q# ?: ~6 h: R
A ballast for high-intensity discharge lamps shall comply with the% F( o2 R+ a9 T/ ^( D: `
requirements of UL 1029 and UL 935.: X7 q) g! X* Z. b+ }
6.4.2 A ballast not previously investigated as described in Clause 6.4.1 shall be evaluated in the device.2 S/ |1 F! d, \1 ?9 _! r
The construction requirements of UL 935 or CSA C22.2 No. 74 or NOM-058-SCFI shall apply. See the* S5 I9 r; Y3 A; D8 r" c
appropriate standard for details on coil insulation materials, thermal and overcurrent protective# G& U( H3 U. Q7 H
components, printed wiring boards, and spacing of electrical parts on the printed wiring board.5 A/ a/ \4 g1 n5 A4 }) Q
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clause 6.6 and table 6.1. ! c/ a8 v  D/ C6 r: M& H% X+ ]
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and LED lamp for ul 8750  clause 7.7 and table 7.4。
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