[ale] AMD300 Watt PS

[jeff hubbs]

I used to run a dual-PPro/200 NT server in an old Government building 
and thank goodness I had an APC Smart-UPS on it because when people 
would cut on those infernal 1200-watt space heaters on that wing, it 
would drop the mains voltage to about 90VAC.  The UPS would run juice 
through its inverter (dunno if it used a tapped xfmr or not) to run the 
box at a nice 110VAC.

- Jeff

Jim Popovitch wrote:

> I suspect that once the UPS(s) switch to battery (due to voltage drop on the
> overloaded line) there is an instant load reduction on the line.  More than
> likely the UPS(s) tests the line for a few seconds before returning to
> normal, inadvertently balancing the overall load on the circuit breaker.
> I'm sure there is a pressure point at which this think could oscillate.  At
> that point I would recommend evacuating the house. :)
> 
> -Jim P.
> 
> -----Original Message-----
> From: esoteric at denali.atlnet.com [mailto:esoteric at denali.atlnet.com]On
> 
>>Robert Heaven wrote:
>>
>>>No, the breaker doesn't pop (ever). Not even when my wife cranks up
>>>her little porable foot heater. (we just get a brown out)
>>>
>>Interesting, so how is it that the ups makes a difference?  The breaker
>>is still pulling the same current through.  The ups is conditioning the
>>current?
>>
> 
> 
> 
> 
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