Hi Brian:
(An equipment d.c. bus is not likely to have high-voltage transients.) AC mains input to this equipment, so must assume the box will see at least 2500V The transient overvoltage is not likely to appear on the d.c. Conduct a test by applying the 1.2x50 2500-volts peak pulse to the a.c. mains. If you don't have the pulse generator, use a 2500 volts peak hi-pot tester. This will prove whether you need the MOV. I'll bet you can take the MOV out. 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 <[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]>
