What version/edition of the standard is being referenced ? Brian
> -----Original Message----- > From: [email protected] [mailto:[email protected]]On Behalf > Of Mark Hone > Sent: Thursday, December 03, 2009 4:32 AM > To: [email protected] > Subject: Short circuit testing transformers > > 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]>
