SUA3000 3U 230VAC Power Input Requirements

[stevendt]

Hi,

I have just moved home and looking to relocate my server rack. I currently have 2xSUA 3000 UPSs that I need to supply with power in their new location. I plan on adding dedicated radial circuits for each UPS.

I have not been able to find anything in the APC documentation on what breaker and cable sizes that I need or even the input power requirements.

Simplistically, a 3000VA unit would require around 13A at 230V, leading me to put them on 16A MCBs (or RCBOs) and probably wire them with 1.5mm2 cable. Can someone advise whether this would be adequate?

In addition, although perhaps slightly out of the ordinary, this is a for domestic installation. I assume that the "worst case" maximum of 3000VA would be drawn when the UPSs were recovering from a power outage and starting to charge depleted batteries? In normal operation, is the current consumption going to be pretty much the same as that required by the connected server loads?

If that is the case, to even out the power requirements, I will probably put an extended delay on restart after power outage on one of the UPSs. How long after a power recovery would it take for the UPS to reduce it's input load to steady state? I think that I am asking how long it takes to charge the batteries with a connected load?

regards

Dave