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  2. MIDRANGE-L
  3. May 2006

Re: Redundant Power

*WARNING* *WARNING* *WARNING*
In this configuration you *MUST* be certain that the UPS is never over 50% load! If it's at even 51% when the power fails and the UPS must carry all of the load instead of only half it caries now it will drop like a stone leaving you completely unprotected and of course unpowered as well!!.
The only way to test this for sure is to unplug all the power supplies that go into the wall and see if the UPS can stand it! 

- Larry

Chris Bipes wrote:

This was a small 1.4kva 110v UPS with only the 520 plugged in.  I just
plugged one power supply in to utility and one in to the UPS.  Hey if
power failed, the 520 should keep running on one power supply, they are
redundant.

Later I added 3 Dell 1850 servers, all with redundant power, one in to
utility and one into UPS.


Christopher Bipes
Information Services Director
CrossCheck, Inc.

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