Luminaires 60598 has 1 degree per hour, just to add another variant.
John C _____ From: Mick Maytum [mailto:m.j.may...@ieee.org] Sent: 12 January 2012 10:47 To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Steady State Conditions - née thermal equilibrium The IEC offers several definitions of thermal equilibrium in its Glossary. thermal equilibrium conditions stable temperature conditions indicated by temperature changes of no more than 3 K (5 °F) or 1 % of the absolute operating temperature, whichever is higher between two readings 15 min apart IEC 62282-2, ed. 1.0 (2004-07) thermal equilibrium variation of less than 1 K between any two out of three consecutive measurements made at an interval of 5 min IEC 61810-7, ed. 2.0 (2006-03) thermal equilibrium state reached when the observed temperature rise of any part of the welding equipment does not exceed 2 K/h IEC 62135-1, ed. 1.0 (2008-07) thermal equilibrium the state reached when the temperature rises of the several parts of the machine do not vary by more than a gradient of 2 K per hour NOTE Thermal equilibrium may be determined from the time-temperature rise plot when the straight lines between points at the beginning and end of two successive reasonable intervals each have a gradient of less than 2 K per hour. IEC 60034-1, ed. 12.0 (2010-02) Nice to see a harmonised approach from the various IEC TCs Regards Mick - ---------------------------------------------------------------- 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 <emc-p...@ieee.org> 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 <emcp...@radiusnorth.net> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher <j.bac...@ieee.org> David Heald <dhe...@gmail.com> - ---------------------------------------------------------------- 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 <emc-p...@ieee.org> 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 <emcp...@radiusnorth.net> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
