Colleagues - I hope you'll excuse what might be a dumb question, but in BSEN61010-1 Clause 4.4.2.6 regarding short circuit testing transformers, it says "Short-circuits shall be made on the load side of any current limiting impedance or over-current protective device which is connected directly to the winding." - my question relates to the meaning of "directly".
Does "directly" mean for instance a limiting impedance/fuse that is part of the transformer's construction? Or can "directly" mean an adjacent fuse (three inches away, say) that has direct wiring between transformer terminals and the fuse holder? Or for that arrangement do I need to do a risk assessment of the likelihood of a short occurring between the output of the transformer and that adjacent fuse, to decide if it may be considered to be "directly" connected? (To allow me to justifiably short circuit test on the load side of the fuse.) All comments will be gratefully received, even if they hurt. Regards, Mark - 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.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. 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]>
