adding a second UPS

[BillP]

Hello,

I have some servers + other equipment protected by a UP MGE EX 11 RT 3:1. (I think that MGE was now buyed by APC...). It's a very good UPS and it's 3 years old.
We are building a new computer room,
With most of the servers, we have redundant alimentation...
Actually the 2 alimentations of the servers are on different PDU but on the same UPS.
So, in case of problem on the UPS, I think that the server are badly down.
If we plug the second alim directly to the AC without UPS, we aren't protected agains surge, ...

So, we are looking to a second UPS. This UPS is only for the time of the servers shutdown when there is a problem on main UPS (because of money, we (the boss) don't want to buy a complete second set of UPS).
So we are looking for a good, easy and cheaper UPS.
Actually the UPs is charged at 27 % (not much) for approx 2200W of charge. The charge of servers is approx 1500 W (2000 W for future use).

What is possible to do ?

Thx

[BillP]

okay so you need a three phase UPS? what is the input voltage you are using?

[is this what we are talking about?|http://www.mgeops.com/index.php/products__1/230v_products/ups/comet_ex_rt]

[BillP]

Yes, It's what I have.
For the second UPs, not necessary to have a three phase UPS.
I can have input voltage 230V (single phase) or 400 V (three phase)

[BillP]

a couple questions..

do you need this to be rackmountable or is a tower okay?
how much runtime are you looking for?

[BillP]

I want a rack solution

And for the time, 10 minutes is ok (just for the time to shutdown the servers)

[BillP · Accepted solution]

this is the closest unit I could come across for your application: [SUA3000RMI2U|http://www.apc.com/resource/include/techspec_index.cfm?base_sku=SUA3000RMI2U]