Kurt In your feedback (thank you!) you state that pollution degree 1 is for conditions with NO pollution at all like a potted epoxy environment. This is the impression I got from UL and other sources. Help me out here please. >From my memory the definition in EN61010-1 (same as in IEC 664) Pollution degree 1 is for non conductive dust environments - no condensation. Pollution degree 2 is for non conductive dust environments - occasional condensation Pollution degree 3 is for conductive dust environments.
The definition for pollution degree 1 implies that this is a standard office like environment. Am I missing something here? Do most PCB spacings get evaluated to pollution degree 2? in ITE? in Automation equipment like Programmable Logic Controllers ? Thanks . Chris Wells Senior Design Eng Cutler-Hammer Pittsburgh Pa [email protected] Original Message----- From: Andrews, Kurt [mailto:[email protected]] Sent: Monday, January 10, 2000 12:14 PM To: Price, Ed; '[email protected]' Cc: 'Chris Wells' Subject: RE: Pollution degree help Ed, Chris, Normally Pollution Degree 1 is used for items that receive no pollution at all. These are hermetically sealed or potted/encapsulated parts. However you can use pollution degree 1 for internal PCB layers. <snip> --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators).
