Urgent: Power Load

[Anonymous user]

Hi Everyone,

How can I tell how much power the UPS device is using to power my devices? It see load percentages, however, my HVAC guys want to know how much VDC or VAC is being drawn.

Thank you,
D

Message was edited by: ddasilva99

[Anonymous user]

External batteries do not affect the amount of load drawn by the UPS, they simply provide more runtime during a power failure.

[Anonymous user]

What is the VA capacity of the UPS and what is the load percentage being reported? This will tell us how much current in amps you are drawing from utility power. The AC voltage should remain the same regardless of the amount of devices being powered. It should be 120 VAC or 208 VAC depending on the feed to the UPS.

[Anonymous user]

I have two UPS systems:

2x- SU3000RMXL3U
6x- SU48R3XLBP

For each main unit (su3000) I have three external batteries connected (SU48). The load reported from UPS#1 is 57.2% and the load reported from UPS#2 is 63.9%

I hope this information helps.
D

[Anonymous user · Accepted solution]

3000 VA X 57.2% capacity = 1,710 VA
3000 VA X 63.9% capacity = 1,917 VA

The unit's themselves have a battery charger that is used when the battery has recently been used. The maximum the charger itself pulls is around 287 Watts. The unit operates at 120 VAC. This should be the information the electrician needs, but let me know if there is anything else.

[Anonymous user]

Hi Grenade,

Does your numbers emcompass the three external batteries or without the three external batteries?

Thank you,
D

[Anonymous user]

HVAC load is on APC site.
375.00 BTU/hr per unit.

http://www.apc.com/resource/include/techspec_index.cfm?base_sku=SU3000RMXL3U

The percent load on UPS is the watts. SU3000RMXL3U is scaled at 2.4kW = 100%, therefore with the values you provided, the connected loads totals 3kW, or 10250BTU (1kW x 3413 = BTU/hr). 10250 BTU + two x (375 BTU) =11,000

The UPSs + your current loads contribute to approximately 1-ton of load on the building HVAC system.