A stepped sine wave isn't really a sine wave. It's a multi-part set of square waves that somewhat approximate a since wave, and there are some electronic components that don't like them.
I don't know if MOVs are still used in surge protectors, or if they're sensitive to them, but it's plausible to me that this might be true... Kurt On Tue, Aug 3, 2010 at 10:31, Maglinger, Paul <[email protected]> wrote: > Interesting, but isn’t A/C power typically a sine wave? Or is it implying > that the UPS generates a “special” sine wave that is different than what the > utility company generates? 60Hz is the norm, is it not? Surge strips are > typically no more than some metal oxide varistors placed across hot, neutral > and ground. Some put torodial coils for noise reduction, but I don’t know > of anything in any of them that would damage the UPS or the surge strip. > > > > IMHO, I think the more accepted reason not to do it is because of the > temptation to plug in more devices than the UPS is designed to handle, and > thereby overload it. > > > > -Paul > > > > > > From: David Lum [mailto:[email protected]] > Sent: Tuesday, August 03, 2010 12:01 PM > To: NT System Admin Issues > Subject: Guilty, will change after reading this. > > > > - do not plug surge protectors into a UPS. If they UPS runs on batteries it > will usually generate a step sine wave which may destroy surge protectors > (in particular tricky to find power strips without surge protector) > > > > http://isc.sans.edu/diary.html?storyid=9319 > > > > David Lum // SYSTEMS ENGINEER > NORTHWEST EVALUATION ASSOCIATION > (Desk) 971.222.1025 // (Cell) 503.267.9764 > > > > > > > > > > ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~
