UPS guide for hp proliant ml350 g6

Hi,

I have a HP Proliant ML350 G6 server. It has a single power suppliy (there is a sticker with 460W indication), 1T hard, 4GB RAM with Windows server 2012.

I'm looking to purchase a UPS for this with following tentative specifications (230 V supply).

Operating mode - Line interactive

Rating - 1000VA

10 minutes running time with UPS is enough in case of power failures

Please advice if the above given rating and the mode of UPS is sufficent for this server. This is not hosted in a data center type location.it's a server palced in my office to run some small applications only.

Thanks Asela