UPSs

[Keith Morse]

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.
>
> Will be looking at this hard.  Have lost too much gear to these kinds of spikes.
>
>   
Indirectly.  I was stationed on SSN-607 from 1978 to 1983.  The boat had
two 300KW Motor/Generators to either charge the ships batteries or to
power the 480V AC bus when both the reactor plant or diesel generator
were not available.  Worked rather well, but the electricians did spend
quite a bit of time with maintenance.