UPS Output Current?

Gessler

New Member
I have a APC Smart-UPS SUA1500I-IND which is powering my PSU through a 6A-to-16A converter plug (because my PSU came with a larger 15/16A plug and the UPS only has 6A sockets).

Anyway, I live in a country with a 240V grid so my 1000W 80+ Platinum PSU would have to be drawing over 1400W for the current to cross 6A so I went ahead with it and have been operating without a problem for over 5 months now.

I just noticed that there's a 'Output Current' reading for my UPS under its section in HWiNFO64 (which shows up to a 3.4A current when I put the system in a OCCT stress test which represents a worst-case scenario for power draw and my current rig draws about 730W max). That amperage roughly comes up to what is expected given the watts & voltage.

I want to know, in case my 6A-16A converter begins to burn/melt in the future (in case it was badly made or whatever) would I be able to tell by keeping an eye on this output current reading? Not an electrical expert but increased heat should increase resistance & increase the current right?

How & at what point is this output current even measured?
 
The output current of the UPS is measured by its scheme, and if it exceeds the permissible, then the UPS will work on the current and turn off the load. But, your load takes not 6A -7A but a little more because It has a reactive (inductive and capacitive) component of the input resistance. Look in the description of your PSU whether there is a node called PFC (Power Factor Corrector) in it - it can be active - APFC or passive (PPFC, PFC) if it is, then for APFS psu current will be approximately 1.15 * measured (assessment current ), for PPFC, about 1.3 * measured (evaluative current), if it is not (usually in budget PSU, this scheme is not put - they save), then 1.7 * measured (estimated current). And from this assessment you can choose an UPS, but not in power in W - this parameter characterizes them little, but in terms of power in V*A and the permissible reactive load of the load that will be approximately 15% (0.15) from the nominal power of the PSU, For PPFC, approximately 35% (0.35) from the rated power of the PSU, and for PSU without PFC 70% (0.7) from the rated power of the PSU. These parameters manufacturers of the UPS usually indicate in its specifications, if not - it is worth asking them to work with the PSU with such parameters and whether the UPS will turn off when the voltage jumps in the supply network, because if the reactive load exceeds the permissible for the UPS, then with a sharp The input voltage jump will instantly turn off.
 
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