[ale] OT need 600-1000W power protection for 3 minutes - cheap

[gcs8]

Always fill out the APC card that says they will insure your stuff? Though
weather they ever pay up is another issue. Also remember that when
selecting batteries to run inside the house to get a SLA / AGM so you are
not releasing hydrogen into your house from the overcharge the unit will
normally put on the batteries. Depending on how hackie you want to get on
the APC you can always mod a 13.8VDC fan on it off of the 12V leg or off
the backup side just snag a old 12V power brick and hardwire it to a
120-140mm case fan, that should help with heat issues, as far as getting to
the VA issue, well, sorta hosed there, if it was just current draw I would
just say move to a 240V line and that would cut your amperage in half, you
could get really creative and go above 120VDC then turn that into a full
wave maybe, you would have to charge the batteries / have power flowing
into the DC side but if the power went out it would not have to switch.


On Tue, Jul 9, 2013 at 9:06 PM, Ron Frazier (ALE) <
atllinuxenthinfo at techstarship.com> wrote:

>
>
> Alex Carver <agcarver+ale at acarver.net> wrote:
>
> >On 7/9/2013 13:13, Ron Frazier (ALE) wrote:
> >> PS, these ups's only have about 300 joules of surge protection.  I've
> >> never understood why.  I would recommend putting a good media room
> >surge
> >> protector first in line, with a 2000 - 3000 joule surge protection
> >> rating, then the ups.
> >
> >Because when the voltage exceeds the setpoint it disconnects the load
> >from the incoming power and switches to battery.  The low surge
> >suppression is to handle surges that stay within the switching limits.
> >
> >
>
> I understand what you're saying, but I'm not totally convinced that's
> enough.  I doubt a 500V 20us transient would trigger a switch over.  Even
> if it did, it takes 10 mS for the switch.  The transient probably will have
> already gone through.  But, it could still harm the pc.  The response time
> of a varister in a surge protector is in nanoseconds so it will trap it.
>  But, these are cumulative over time and destroy the surge protector.
>  Since GA has the 2nd highest incidence of lightning in the country, I
> still like the idea of a big 3000 joule surge  protector sitting there.
>
> Sincerely,
>
> Ron
>
>
> --
>
> Sent from my Android Acer A500 tablet with bluetooth keyboard and K-9 Mail.
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>
> (PS - If you email me and don't get a quick response, you might want to
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> quickly.)
>
> Ron Frazier
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-- 
Charles Selfridge

PBYC  IT director

(404) 910-3409
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