UPSs

[Bill Campbell]

On Tue, Nov 29, 2005, David Bandel wrote:
>On 11/29/05, Roger Oberholtzer <roger at opq.se> wrote:
>> On Tue, 2005-11-29 at 10:16 +0100, Roger Oberholtzer wrote:
>>
>> [UPS stuff deleted]
>>
>> Switch 'off-line' and 'on-line' my earlier text. Too early...
>>
>
>Had already done that in my head while reading.
>
>Well, I was curious if anyone had actually tried a motor -> steel
>shaft -> generator type of arrangement.  This would, of course isolate
>completely.  No spikes would ever get through.  Cost is around $700
>here, about the same as some of the other suggestions.

The last time I saw one of those critters was at a large satellite
installation (by large, they have a 30 meter dish that would track low-
orbit satellites) where there was a 3,000lb flywheel on the shaft to keep
the generator going until the diesel generators could kick in.

Bill
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