In message
<64D32EE8B9CBDD44963ACB076A5F6ABB02716FA6@Mailbox-Tech.lecotech.local>,
dated Thu, 17 Sep 2015, "Kunde, Brian" <[email protected]> writes:
This lab area has surge protection, so again, we believe the problem is
some kind of low voltage transient, voltage dropout, or waveform
distortion that we have been unable to detect and simulate.
There really isn't enough energy in any of those, if they are so far
undetected, to cause the destruction you describe. Something is dumping
probably hundreds of joules into the parts between the mains inlet and
the rectifier, including the latter. I think you said that the diodes
are short-circuit, but at least they were not vaporized, like the other
parts. So the energy seems to enter from the mains, which still points
me towards that high-current filter.
I know you can't create the fault, but can you take the mains feed for
the power supply from upstream of the high-current filter, so it is much
less likely to cause anything?
--
OOO - Own Opinions Only. With best wishes. See www.jmwa.demon.co.uk
When I turn my back on the sun, it's to look for a rainbow
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
-
----------------------------------------------------------------
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]>
