请高手指点：60950中III类设备的开孔问题
III类设备由一个满足LPS的电源供电，设备内PCB的防火是V-1以上，这样设备的外壳只需HB即可，那开孔要满足4.6的要求吗？ 没人碰到过这种问题吗？ 还是需要满足4.6规定的开孔要求。 电源已经满足了LPS外壳的材质就已经满足了防火外壳的要求了 开孔也不需要满足里面的要求看你把你的产品定义为是什么设备要是定义为transportable equipment 里面有TNV线路的话你就要考量了
transportable equipment你就按照4.6.2 The risk of ignition caused by small metallic objects, such as paper clips or staples, moving
around inside TRANSPORTABLE EQUIPMENT during transportation shall be reduced by measures to
minimize the likelihood of such objects entering the equipment and bridging bare conductive
parts that may result in a fire hazard. Except as required in 4.6.4.3, provision of such measures
is not required for bare conductive parts between which the power is limited in accordance with
2.5.
NOTE The above requirement only applies to bare conductive parts. Conductive parts covered with conformal or other coatings are not
considered to be bare conductive parts.
Compliance is checked according to 4.6.4.1, 4.6.4.2 and 4.6.4.3 as appropriate. During the
inspection and tests, all doors or covers are closed or in place and peripheral devices or
assemblies, such as disk drives, batteries, etc., are installed as intended.
202 CAN/CSA-C22.2 NO. 60950-1-07 ♦ UL 60950-1 MARCH 27, 2007 楼上说的为什么便携式设备里有TNV电路就要考虑?标准中没有这样说过吧?
另外关于开孔问题,大家有不同意见,我很困惑,到底是怎样判定的呢
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