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RE: [datacenter] Flywheel ups



Also you say you need 10 MIN of ride through.  Powerware's flywheel
system has 120 SEC (2MIN) of ride through and an MG set isn't going to
give you 5 times the ride through if you have 1/5th the load like a UPS.

-----Original Message-----
From: Deepak Jain [mailto:[email protected]] 
Sent: Friday, December 02, 2005 4:32 PM
To: Krzysztof Adamski
Cc: [email protected]
Subject: Re: [datacenter] Flywheel ups

You probably also realize that the maintenance (lubrication, bearings, 
etc) on a flywheel easily exceed the amount of maintenance on a sealed 
battery system.

The difference (mainly) is that you have relatively uniform maintenance 
costs instead of the jagged-saw tooth (with battery replacement) that 
UPS systems have.

Deepak Jain
AiNET

Krzysztof Adamski wrote:
> I'm starting to design a new 1000sqf datacenter in a building that has
> reliable generator backup. So I will only need about 10-15 mins of UPS
> power (if the generator won't start in that time, it won't start for a
> long time :-). I will only need AC power.
> 
> I was wondering what peoples opinion was of the flywheel type UPS?
> The plus I see is that there is no battery bank to worry about.
> 
> K
> 
> 
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