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I wonder what is needed to reduce a PD3 (pollution degree 3) environment to PD2?

It seems that IP54 housing could do it, but I have not found this clearly written in text (there is some vague mentioning of it in IEC 60664-1 Annex B, attached). However, I found this link where it is written "IP 54 rated enclosure alone does not provide a pollution degree 2 environment". How come I wonder?

https://www.iecex.com/dmsdocument/67

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warpi
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    I don't have a full answer. Last time I did it we ended up with hermetically sealed and thus PD1. How's your cooling situation? Do you need airflow? – winny Apr 13 '23 at 13:18
  • @winny Thanks for feedback! Currently, yes, we need aircooling. – warpi Apr 14 '23 at 18:20

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We had the same issue. The standard that specifies this is IEC 61010-1.

You have to follow the indications in table E.2 - Reduction of pollution degree. If your macro-environment is p.d. 3 then you could reduce the micro-environment to 2 by using an enclosure at least IPx7 (see the disclosure on maintenance conditions).

Greenonline
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LuCASTORO
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