centos-bounces@xxxxxxxxxx wrote:
> Brunner, Brian T. wrote:
>> centos-bounces@xxxxxxxxxx wrote:
>>
>>> And the APC Smart-UPS 750 units are not all that expensive
>>> either. Even the 1500VA units are a lot less expensive then they
>>> were 5-10 years ago. $250-$300 to protect $2000-$6000 worth
> of hardware is worth it in my book.
>>
>> To what extent does a UPS *protect* the hardware?
>> Maintaining up-time during brief brown-outs is one thing I expect of
>> a UPS,Orderly shutdown is another thing I expect of a UPS.
>>
>> *protection* of the PC from irregularity in the AC Mains by a UPS,
>> however, I question. Rather, it seems, any power irregularity that
>> would kill a PC by propagating through the PSU will also propagate
>> through the UPS.
>>
>> NO UPS MADE TODAY (according to my reading of the stats on
>> advertisements) eats lightning strikes and asks for more.
>>
>> So per your experiences and greater technical savvy: What PSU/PC kill
>> power irregularities will be stopped by which UPS?
>
> Really? That's what you read in the specs?
Yes. Compare the joules rating (as being stopped by a UPS with surge
suppression)
to the joules required to damage the computer on the other side of a
PSU.
So per your experiences and greater technical savvy: What PSU/PC kill
power irregularities will be stopped by which UPS?
Robert Heller suggested that UPS architecture matters:
AC->DC::DC Batteries::DC->AC
Where input AC is electrically decoupled from output AC.
Not many adverts for UPS's explain whether this is the case with their
UPS.
> Here, I thought that good quality surge protectors would do that,
> and my UPS does says surge protection as well as UPS. IIRC, UPSs, and
better surge
> protectors, offer a multi-thousand dollar warranty if it doesn't stop
a large
> surge and your system's fried.
Have you tried collecting on said warranties?
Be prepared to prove that the surge that fried your hardware did not
exceed the joules rating on the surge suppressor.
Insert spiffy .sig here:
Life is complex: it has both real and imaginary parts.
Life is not measured by the number of breaths we take, but by the
moments that take our breath away.
//me
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