[Nut-upsuser] Slightly OT: Generators & UPS

[Dan Mahoney, System Admin]

On Fri, 1 Sep 2006, Basheer Noorgat wrote:

Actually we've been where I work of a similar but different issue.

Power goes out.  UPS catches load.  Generator spins up.  UPSes see 
generator power and accept it, go back into standby.

When the transfer switch kicks BACK (which is done WITHOUT a voltage 
drop as we are switching from good-power to good-power), the UPS sees it 
as a power LOSS situation and goes to battery, and subsequently dies.  Our 
powercom rep says that we need to upgrade because of this.  Has anyone 
else ever heard of an issue like this?

Also, is there a better list for the discussion of general UPS-related 
issues?

-Dan

> Hi,
>
> Can anyone shed some light on this:
>
> My PC's are on a separate power circuit. Each PC has its own UPS.
>
> I have an old Honda generator. When the power goes out, I fire up the
> generator. However, the UPS's still run on battery. If I connect the
> PC directly to the socket and bypass the UPS, the PC works.
>
> I was told by a UPS supplier, that the power output from the
> generator was "dirty" hence the UPS's preferred to remain on battery
> power.
>
> Recently, the power went out and fired up the generator.
> Surprisingly, all UPS worked and accepted the generator power.
>
> This time the only difference was that we also powered off some
> halogen spotlights and some energy saving compact flourescent
> lighting from the generator.
>
> Can anyone shed some light on what happened?
>
> When I get a chance, I will try and repeat what happened and see the
> outcome...
>
> Regards
>
>
>
>
> Basheer Noorgat
> NMC EXQUISITE
> 23 Bauhinia Rd., Stanger, 4450, South Africa
> P.O.Box 2449, Stanger, 4450, South Africa
> Ph: (032) 551 3300     Fax: (032) 551 4414
> Cell: 082 5510 227     Int. Code: +27 (32)
> Web Site: http://www.nmcexquisite.com
> Basheer Noorgat
> NMC EXQUISITE
> 23 Bauhinia Rd., Stanger, 4450, South Africa
> P.O.Box 2449, Stanger, 4450, South Africa
> Ph: (032) 551 3300     Fax: (032) 551 4414
> Cell: 082 5510 227     Int. Code: +27 (32)
> Web Site: http://www.nmcexquisite.com
>
>
>
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> Nut-upsuser at lists.alioth.debian.org
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>

--

"this is too stupid even for irc"

-mtreal, EFnet #macintosh, 09/15/2K, 12:33 AM

--------Dan Mahoney--------
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