UPS Systems

[Mikeu]

Can anyone link a basic design guide for UPS systems?

It would be much appreciated.

Thanks.

 

[hmchi]

Try this

http://www.sandc.com/pdfs/600/653_453.pdf

 

[Mikeu]

How is this connected?

My building voltage is 277/480,3ph,4w and they need a panel which is UPS protected. So I can connect this like a transformer?

I'm not sure how to show this on a one-line. Just like a transformer?

I assume it would be like a generator with a transfer switch which would switch over to the UPS?

 

[hmchi]

[I assume it would be like a generator with a transfer switch which would switch over to the UPS?]

Yes, see page 3 of this link

http://www.sandc.com/pdfs/600/653_30.pdf

 

[Mikeu]

I saw that diagram.

Does the UPS have the isolation transformer integral to it? Does it also have the circuit breakers integral?

I only need one panel (computer loads) connected to a UPS. So, would I connect thru the UPS or have a transfer switch. I am assuming directly thru it.

 

[hmchi]

[Does the UPS have the isolation transformer integral to it?]

Yes

[Does it also have the circuit breakers integral?]

Yes, everything shown on the diagram is included, you only need to bring in the utility power source and the cables to the load.

[I only need one panel (computer loads) connected to a UPS. So, would I connect thru the UPS or have a transfer switch. I am assuming directly thru it.]

Then bring the cable from the panel originally destined to the computer loads to the UPS instead, and the output of the UPS to the loads.

 

[busbar]

Try IEEE Std 446, Recommended Practice for Emergency and Standby Power Systems for Industrial and Commercial Applications.

 

[BJC]

Mikeu
Heres a cheap one for you. I have noticed that some of the Army manuals are the same as the IEEE standards.

http://www.usace.army.mil/publications/armytm/tm5-693/toc.htm

 

[Mikeu]

Thanks to everyone.

 

[alehman]

This explains some of the basics.

http://www.liebert.com/support/whitepapers/documents/bsc_ups.asp