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Re: [datacenter] Flywheel ups



That said, you probably don't need 10 minutes of ride through either..

When a generator doesn't kick on, it takes facilities guys at least 30 minutes to have the >courage< to start flipping breakers when you are dealing with a 2MW monster (or several). I suspect with a 1000 sq ft data center, it'll still take at least 10 minutes to start flipping switches.
:)

DJ

Howard Marks wrote:
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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