Saw exactly this happen on flight deck of USS Midway during 1979. While troubleshooting APD10 radar, the hydraulics guy that was helping me shorted the 400Hz bus to the box containing the power supply, and a star washer vaporized because part of the converter was floated. The star washer was not authorized construction.
This was my first experience with 'compliance engineering' . Brian -----Original Message----- From: John Woodgate [mailto:[email protected]] Sent: Sunday, March 01, 2015 11:33 PM To: [email protected] Subject: Re: [PSES] Serrated head screws for grounding/bonding In message <[email protected]>, dated Sun, 1 Mar 2015, Richard Nute <[email protected]> writes: >OTOH, there is still that possibility of a heavy fault current blasting >away tiny point-contact conduction paths. I wonder whether that actually happens. It seems to me that the points might, instead, melt and weld to the substrate. That's how spot-welding works. An experiment or three is indicated. - ---------------------------------------------------------------- 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.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 <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
