Bob, The quickest way to determine the need for output fusing is to do the test. That is a short to the output should not result in a hazard such as spread of fire, electric shock, ejecting of parts, lifted circuit traces, melted insulation, etc. You use the word small, but 4 x 24= 816 watts. By the reckoning of most safety standards âthis is not low energy, meaning you can achieve ignition. Thanks, - doug Douglas Powell http://www.linkedin.com/in/dougp01
Greetings, I am curious to know what guidelines to use when fusing power supplies. I have a machine with some small 4amp 24v power supplies. I have placed breakers on the input side of supplies. I donât know if the current limit circuits within
the power supply can be expected to protect output wiring. I am mainly concerned with NFPA 7 & NEC, but I would like to hear UL or IEC thoughts on the subject. The power supply manufacturers I have asked donât seem to know â that struck me as very odd. Many years ago I worked for a manufacturer of motor drives. We developed a software implementation of a motor overload relay and got UL 508 blessing. I am looking for similar arrangement. Thank you and Merry Christmas. Bob N9NEO ---------------------------------------------------------------- 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/ For help, send mail to the list administrators: For policy questions, send mail to: ---------------------------------------------------------------- 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/ For help, send mail to the list administrators: For policy questions, send mail to: |
- [PSES] fusing outputs of small power supplies Bob LaFrance
- Re: [PSES] fusing outputs of small power supplies Doug Powell
- Re: [PSES] fusing outputs of small power supplies Doug Powell
- Re: [PSES] fusing outputs of small power suppl... Scott Aldous
- Re: [PSES] fusing outputs of small power supplies John Woodgate
- Re: [PSES] fusing outputs of small power supplies Richard Nute
- Re: [PSES] fusing outputs of small power supplies Brian Oconnell