Using ups to protect my pc , can it handle my psu ?

[sam dan]

Hi , i have fsp hexa+ 500 watt psu
And i live in a place where i might suddenly lose electricity for couple of minutes , so i decided to use UPS to protect my pc from sudden lose of power .

Here is what is written on it :
Input :220-240vac.50/60hz,3.9a,1

Output:220-240vac.50/60hz,2.7a,1

600va/360w

My question is , when UPS is plugged to the wall , can it output more than 500 watt ? If so does the 360w means that it only deliver 360w when i lose electricty ?

Thanks

 

[George Mulligan]

Yes, the 360W rating means it can only deliver 360W when your power goes out.

However, your 500W PSU is very likely not drawing 500W...that is just its rating. Your system may only be drawing 200-250W (typical number for an average PC), in which case your 360W UPS is perfectly fine.

Can you tell us what CPU, hard drives, and GPU (if any) that your are using?

 

[Robert Cook]

if it claims 2.7A output at 22-240V then it should be able to output 600 or slightly more Watts. and if this is onlt for a few minutes then it should not be a big issue either way. what is in your computer(we can calculate an estimated power draw from there)? the power supply will probably not be using 500W (in fact, if it is ever pegged at 500W then your PSU is too small for your build)

just note that that power supply is on the low end, at some point in the future you might want to get a more solid power supply.

 

[Robert Cook]

the 600VA rating is bothering me, the power factor coming out of the UPS should be near perfect, so 600VA should equal pretty much 600W.

 

[George Mulligan]

The 600VA rating has to do with the battery capability of the UPS. The 2.7a output rating at 220V has to do with the electrical design of the components while power is going through it (while plugged in). When unplugged, the 360W rating is what the UPS can supply.

 

[sam dan]

Here is what i have :
Gtx asus dual 1060 6gb ( no oc )
I7-6700 (no oc )
8x2 ddr4 2166
Asus maximun v3 hero
hdd western digital green 1tb
Monitor says 22 watt

 

[Robert Cook]

it it were battery capacity then it should be 600VAhours?

 

[George Mulligan]

Not capacity (for which VAh would be the right metric), capability. UPS internal capacitance and battery can withstand 600VA...much like a surge protector rating.

 

[Robert Cook]

Hmm interesting to learn, thanks for explaining.

 

[George Mulligan]

Here is what i have :
Gtx asus dual 1060 6gb ( no oc )
I7-6700 (no oc )
8x2 ddr4 2166
Asus maximun v3 hero
hdd western digital green 1tb
Monitor says 22 watt

My quick estimate is about 250W. You're well under the 360W limit of the UPS, and in the sweet spot for efficiency of your PSU (about half of rating).

 

[Robert Cook]

yeah 250W at most 270.

 

[George Mulligan]

Hmm interesting to learn, thanks for explaining.

You earlier mentioned power factor. In fact, the typical power factor rating for this equipment is about 0.6 - 0.65 (not unity), which is consistent with the 600VA capability and the 360W output rating.

 

[Robert Cook]

really the power factor is that low? I always heard of using UPSes as cheap power factor correction options. but a power factor of .6 yes that would certainly explain the wattage. I guess I am around too many CFL ballasts with the 90+ PFR.

 

[sam dan]

So in a nutshell . When plugged there is no limit ( ofcourse there is the psu's limit ) .
When electricty goes off , it can deliver 360w which is above what my pc needs .
Though i am wondering can it deliver more than 360w by anymeans for like 1 minutes ? Just wondering

 

[Robert Cook]

So in a nutshell . When plugged there is no limit ( ofcourse there is the psu's limit ) .
When electricty goes off , it can deliver 360w which is above what my pc needs .
Though i am wondering can it deliver more than 360w by anymeans for like 1 minutes ? Just wondering

through the eyes of the components, it probably could, but there is probably a power limit which might trip if you draw more than 360W.

 

[George Mulligan]

So in a nutshell . When plugged there is no limit ( ofcourse there is the psu's limit ) .
When electricty goes off , it can deliver 360w which is above what my pc needs .
Though i am wondering can it deliver more than 360w by anymeans for like 1 minutes ? Just wondering

Close...

When plugged in, there is a limit of 2.7a, or approximately 600W.

When electricity goes out, the supply limit is 360W.

You will not be able to exceed 360W for any amount of time. If a larger current draw is demanded, voltage will sag, which will cause equipment to trip itself off. This does not consider the fact that there may be a small margin in the ratings provided.

 

[sam dan]

@George Mulligan , @Robert Cook
Thanks for both of you