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'[EE] Source for no drop out UPS'
2008\01\02@174630 by Marcel Duchamp

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I have a one-off need for a light duty UPS, say about 100W-200W or so,
that is constantly on.  Thus, it would have zero drop out going from
loss of AC to battery backup.  The load will not tolerate more than
maybe 1mS switchover time.

This appears not to be specified in most data sheets I've seen so far.
Does anyone have a suggestion of brands to look at for this feature?

If I can't find one, I'll probably punt and get a gel-cell float
charger, a gel-cell and an inverter.

Thanks!

2008\01\02@175817 by Rob Robson

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I don't know whether they make anything in that size range, but Liebert make
some very good always-on units.

RR

{Original Message removed}

2008\01\02@193321 by Herbert Graf

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On Wed, 2008-01-02 at 14:45 -0800, Marcel Duchamp wrote:
> I have a one-off need for a light duty UPS, say about 100W-200W or so,
> that is constantly on.  Thus, it would have zero drop out going from
> loss of AC to battery backup.  The load will not tolerate more than
> maybe 1mS switchover time.
>
> This appears not to be specified in most data sheets I've seen so far.
> Does anyone have a suggestion of brands to look at for this feature?
>
> If I can't find one, I'll probably punt and get a gel-cell float
> charger, a gel-cell and an inverter.

What you are looking for is an "online" UPS. They are actually more
common then in days past, however I doubt you'll find such a small one.

Ignoring the size, they'll be more expensive then "normal" UPSs.

TTYL

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