A few points, which may, or may not, be useful:
1) Annex E is only informative, not normative 2) From what you have described, the equipment is operated in an uncontrolled environment, but is not opened in that environment during installation or maintenance (at least the PCB, which is the bit you are concerned about). We aren't worried about deposition on the outside, the enclosure, only on the PCB and other components inside. 3) You then need to know the pollution degree of the macro environment, basically whether or not it's in a dirty dusty damp environment or whatever. 4) That together takes you into the table, and you can see where it comes out, it might be that X5 or X6 would do. 5) The IP figures don't make much sense to me, because it seems odd to only consider the water ingress value, and not also bother with the solid objects one. Surely dust ingress is as important, and maybe more important, than just moisture ingress? John C _____ From: Ian White (SXS UK) [mailto:[email protected]] Sent: 31 October 2012 14:49 To: [email protected] Subject: [PSES] LVD Standard EN61010-1:2010 and Annex E Can l have your comments on this please. EN61010-1:2010 Annex E deals with the guidelines for the reduction of pollution degrees due to the micro-environment created by the enclosure. Is it really saying that any product in a uncontrolled environment must have a IPX7 or IPX8 enclosure rating before the reduction can take place. See table below : 7 Immersion up to 1 m Ingress of water in harmful quantity shall not be possible when the enclosure is immersed in water under defined conditions of pressure and time (up to 1 m of submersion). Test duration: 30 minutes Immersion at depth of 1m 8 Immersion beyond 1 m The equipment is suitable for continuous immersion in water under conditions which shall be specified by the manufacturer. Normally, this will mean that the equipment is hermetically sealed. However, with certain types of equipment, it can mean that water can enter but only in such a manner that it produces no harmful effects. Test duration: continuous immersion in water Depth specified by manufacturer As l have read Annex E if a controller (which has a IP65 facia keypad but IP4X case) which is designed to be fitted into a panel would really require a IPX7 or IPX8 case (if a pollution reduction was allowed to take place at the pcb level) as the controller enclosure (not the pcb) would be exposed to uncontrolled environmental conditions during installation or maintenance. This does seem a little extreme as these times are very small compared to the life of the controller and the actual pcb will never be exposed. Do l understand Annex E correctly ? Thanks Ian White Compliance and Reliability _____________________________________________________________________ Spirax-Sarco Engineering Plc. This e-mail has been scanned for viruses by Verizon Business Internet Managed Scanning Services - powered by MessageLabs. For further information visit http://www.verizonbusiness.com/uk - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher <[email protected]> David Heald <[email protected]> - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
