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UPS rating vs. facility's power rating

APC UPS Data Center & Enterprise Solutions Forum

Schneider Electric support forum for our Data Center and Business Power UPS, UPS Accessories, Software, Services, and associated commercial products designed to share knowledge, installation, and configuration.

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badkuk_apc
Cadet
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2
137

UPS rating vs. facility's power rating

This was originally posted on APC forums on 5/27/2011


Hello,

Sorry for being such a noob, but we're currently building a proposal for a client which involves UPSes for AIX midrange servers. They want something that can supply 30 minutes of backup power to these servers; i used APC's product selector(by load), and presented a list of models that are rated at 5kVA.

Problem is, the client did mention that their power facilities can only handle 3kVA, at 240V and 13A. Does this mean i can't use the 5kVA products?

What's a possible workaround for this? Can i possibly use two 3kVA UPSes and attach each redundant PSU to each of these units(redundant PSUs are supposed to share the load 50-50 right?)?

tia


Accepted Solutions
BillP
Administrator Administrator
Administrator
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0
137

Re: UPS rating vs. facility's power rating

This reply was originally posted by Bernard on APC forums on 5/27/2011


One more thing, not all redundant PSUs draw half and half from where they are connected,
some act like backups for when one of the PSUs fail.

See Answer In Context

2 Replies 2
BillP
Administrator Administrator
Administrator
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0
137

Re: UPS rating vs. facility's power rating

This reply was originally posted by Bernard on APC forums on 5/27/2011


Good day!

Yes you can go with two (2) 3kVA units, APC has SURTD units that can work with your client's 240V site voltage
(check the tech specs first and you should see Other Input Voltage just above Batteries and Runtime,
but you still need to take into consideration the input requirements of the units that you are going to get like the input
plug that the UPS requires.

For a complete list of the SURTD units you can check [this page|http://www.apc.com/products/family/index.cfm?id=163] and look under 208V Output / 208V Input

BillP
Administrator Administrator
Administrator
0 Likes
0
138

Re: UPS rating vs. facility's power rating

This reply was originally posted by Bernard on APC forums on 5/27/2011


One more thing, not all redundant PSUs draw half and half from where they are connected,
some act like backups for when one of the PSUs fail.