海之未央 发表于 2011-3-18 09:52

个人理解也是污染等级2来处理,,,但是是否有权威标准出处呢???是否是UL840??

ok_hmh 发表于 2011-3-18 11:28

IEC62109标准中是有这个的

hdf590 发表于 2011-3-19 21:48

Table 2 – Examples of the provision of pollution degree environments
Reduction of Pollution Degree 3 to Pollution Degree 2
Control of the Pollution Degree 3 environment to Pollution Degree 2 can be
accomplished by either:
– providing continuous energization of the enclosed equipment; or
– providing separate climate conditioning which prevents condensation
within the OUTDOOR EQUIPMENT or OUTDOOR ENCLOSURE; or
– the use of an ENCLOSURE meeting IP54.

lele11 发表于 2017-5-22 10:17

hdf590 发表于 2011-3-19 21:48 static/image/common/back.gif
Table 2 – Examples of the provision of pollution degree environments
Reduction of Pollution Degree ...

请问这个信息出自于哪份标准?谢谢!

hdf590 发表于 2017-5-22 17:09

lele11 发表于 2017-5-22 10:17 static/image/common/back.gif
请问这个信息出自于哪份标准?谢谢!

UL60950

powerlg 发表于 2017-5-23 15:24

污染等级和IP等级没有必然关系。请查看60950-1中污染等级定义,2.10.10, 2.10.12章节。污染等级1通常是指封装元件。

火水晶 发表于 2022-9-9 14:13

ok_hmh 发表于 2011-2-16 17:57
附加防护                  从外部环境污染等级2到:       从外部环境污染等级3到:    降低污染等级的 ...

你这个内容是什么标准里看到的,盼复!
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查看完整版本: IP54防护等级下内部PCB板的污染等级确认?