Re: [PSES] input current rating
Dear Bostjan: One of the uses of current rating on equipment is to determine that the equipment, with all of the other equipment, would not overload the mains circuit. If the actual current exceeds the marked current, then the equipment, with all of the other equipment, can overload the mains but there is no means to identify the culprit equipment. Note, however, that there is no limit on lower current than rated current. I suspect this is because much equipment has an idle mode during which the input current is minimum. Best regards, Rich - 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://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas sdoug...@ieee.org Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com
Re: [PSES] input current rating
In message fe454ecafb4cfe4a89dd78f78ef9e38fa03...@ser-ex01.siq.si, dated Sun, 17 May 2015, =?iso-8859-2?Q?Bo=B9tjan_Glavi=E8?= bostjan.gla...@siq.si writes: Does anyone know what is behind the requirement, that measured input current of the unit can exceed the rated current by 10%? Where this 10% come from? It's an estimate of the variation in actual input current between samples, due to component tolerances. Why 10 %? It's based on experience that no-one complains that the allowance is neither insufficient or too large. -- OOO - Own Opinions Only. With best wishes. See www.jmwa.demon.co.uk When I turn my back on the sun, it's to look for a rainbow John Woodgate, J M Woodgate and Associates, Rayleigh, Essex 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 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://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas sdoug...@ieee.org Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com
Re: [PSES] input current rating
In message fe454ecafb4cfe4a89dd78f78ef9e38fa03...@ser-ex01.siq.si, dated Sun, 17 May 2015, =?utf-8?B?Qm/FoXRqYW4gR2xhdmnEjQ==?= bostjan.gla...@siq.si writes: Thank you. But for example if I measure 10% more than rated, it is still pass by the standard and I test only one sample. So in real production it can be more than 110% considering tolerances. 'Rated' is the value stated by the manufacturer. So if you measure 110% of 'rated' on your one sample, you have set the 'rated' value too low. -- OOO - Own Opinions Only. With best wishes. See www.jmwa.demon.co.uk When I turn my back on the sun, it's to look for a rainbow John Woodgate, J M Woodgate and Associates, Rayleigh, Essex 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 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://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas sdoug...@ieee.org Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com
Re: [PSES] input current rating
Hi Bostjan! I had heard (and perhaps this is apocryphal) that the 10% was intended to allow for manufacturing tolerances in the final product. I don't know how the number was arrived at. -Ken On Sun, May 17, 2015 at 12:13 AM, Boštjan Glavič bostjan.gla...@siq.si wrote: Dear experts, Does anyone know what is behind the requirement, that measured input current of the unit can exceed the rated current by 10%? Where this 10% come from? Best regards, Bostjan - 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 LT; emc-p...@ieee.orgGT; 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://www.ieee-pses.org/list.html (including how to unsubscribe) http://www.ieee-pses.org/list.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas LT;sdoug...@ieee.orgGT; Mike Cantwell LT;mcantw...@ieee.orgGT; For policy questions, send mail to: Jim Bacher LT;j.bac...@ieee.orgGT; David Heald LT;dhe...@gmail.comGT; - 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://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas sdoug...@ieee.org Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com
Re: [PSES] input current rating
Hi Ken, Thank you. But for example if I measure 10% more than rated, it is still pass by the standard and I test only one sample. So in real production it can be more than 110% considering tolerances. Best regards, Bostjan From: IBM Ken [mailto:ibm...@gmail.com] Sent: Sunday, May 17, 2015 6:24 AM To: Boštjan Glavič Cc: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] input current rating Hi Bostjan! I had heard (and perhaps this is apocryphal) that the 10% was intended to allow for manufacturing tolerances in the final product. I don't know how the number was arrived at. -Ken On Sun, May 17, 2015 at 12:13 AM, Boštjan Glavič bostjan.gla...@siq.simailto:bostjan.gla...@siq.si wrote: Dear experts, Does anyone know what is behind the requirement, that measured input current of the unit can exceed the rated current by 10%? Where this 10% come from? Best regards, Bostjan - 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 LT;emc-p...@ieee.orgmailto:emc-p...@ieee.orgGT; 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://www.ieee-pses.org/list.html (including how to unsubscribe)http://www.ieee-pses.org/list.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas LT;sdoug...@ieee.orgmailto:sdoug...@ieee.orgGT; Mike Cantwell LT;mcantw...@ieee.orgmailto:mcantw...@ieee.orgGT; For policy questions, send mail to: Jim Bacher LT;j.bac...@ieee.orgmailto:j.bac...@ieee.orgGT; David Heald LT;dhe...@gmail.commailto:dhe...@gmail.comGT; - 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://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas sdoug...@ieee.org Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com
