标题: LED Lamp [打印本页] 作者: aillafeng 时间: 2011-6-23 14:27 标题: LED Lamp 有的LED lamp 要满足environmental pollution degree 0 \# L: _! i a8 c但是我只知道有IP code ) J5 x3 @+ K7 c7 a- m0 f
请问environmental pollution degree 有何标准验证作者: 依然 时间: 2011-6-23 14:41
environmental pollution degree 是在UL840里对PCB板上电气间距要求的一个分级，LED 灯泡可以参考UL1993中的这段条款： 1 P. u8 g, W$ e1 O/ V9.8 When applying the requirements specified in UL 840 to determine environmental pollution, the device# `1 _9 Z# J% b
can be evaluated with different environmental pollution degrees. The following conditions apply:0 |5 e. Z7 C8 X( D3 v7 C: u
a) A device marked for damp or wet use shall be exposed to environmental pollution degree 3. ) \: [3 u I; Db) A device intended for dry locations shall be exposed to environmental pollution degree 2.( b( R0 O" H/ Q& s5 d% ]
c) The portion of a printed wiring board covered with a potting compound or a conformal ! T' v- ^ A) M k7 Y1 r3 Ecoating that complies with the requirements in Conformal-Coating Tests, Section 32, shall be 2 K; E8 U9 j# [exposed to environmental pollution degree 1.作者: Nezof 时间: 2011-6-23 15:39
是不是光污染？