Does Ups Damage Power Supplys With Pfc?

[crackhead2k]

Just something I have noticed around the internet.

I had my Antec trio 650 connected to my BackupUPS XS 1300(APC)
and now its make a squealing noise when loaded (blend on prime95q6600@3800)

I've ran the system with the UPS for about 1 month

[[Spectre]]

No a power supply wiht APFC works better with a battery backup.

[BenchZowner]

Check what kind of output your UPS has.
If your UPS output is not a true sine waveform then you have that squeal and "issues" that can 'kill' the PSU longterm.

[jonnyGURU]

Probably not.

An audible squeal is probably coming from a transformer in the PSU. By the time power gets to any transformer in a PSU, it's already been filtered for transients by caps and varistors, converted from AC to DC and then filtered by caps again.

Now, there's the chance that it's a leaking primary cap, that would be audible, but that rarely happens and the Trio has good caps. So it's highly unlikely that using a UPS would have any ill effect on your PSU.

[[XC] serlv]

Just something I have noticed around the internet.

I had my Antec trio 650 connected to my BackupUPS XS 1300(APC)
and now its make a squealing noise when loaded (blend on prime95q6600@3800)

I've ran the system with the UPS for about 1 month

references?

[[Spectre]]

Check what kind of output your UPS has.
If your UPS output is not a true sine waveform then you have that squeal and "issues" that can 'kill' the PSU longterm.

No.

[SparkyJJO]

I run a UPS, and I've had an APFC PSU (corsair HX620) for a year. No issues.

[crackhead2k]

http://forums.isxusergroups.com/thread.jspa?threadID=376&tstart=0
Quoting from that site....
The loud buzzing comes from the PSUs front end components. I don't agree with the wording "modified sinewave" because Back-UPSs' output is closer to modified square wave. Although uncommon there is simulated sinewave, which breaks down the climb into several steps.

http://img338.imageshack.us/img338/3759/waveformln6.gif
This is what the output of Back-UPS and majority of "modified sinewave" UPSs look like. In IT loads,this goes through an inductive filter (to keep RFI from power supply from getting into the power line) and turned into ~340v DC. The PSU then converts 340V DC into respective rails through a high frequency converter and an isolation transformer (so you won't have the slightest chance of seeing 340v at the output even in the event of a failure!)

The faster rise and fall jump rather than sloping up/down is causing the inductive filter to make an audible buzz.

My PSU IS an antec may not like the modified SQUARE sine wave......
The squealing is quite bad on full load even after removing it from the UPS, non of my other antec 650 have that....

I only started thinking about UPS and power supplies after visiting a forum which had a guy with mb or psu squealing problems...
http://www.asktheramguy.com/v3/showthread.php?t=63858

I only have a 8800gt and 3 HDs and 1 dvdwriter which i don't think would completely overload the PSU even at 3800..

[crackhead2k]

I run a UPS, and I've had an APFC PSU (corsair HX620) for a year. No issues.

What UPS is that?

[jonnyGURU]

http://forums.isxusergroups.com/thread.jspa?threadID=376&tstart=0
Quoting from that site...

The person from that post said BUZZ, not squeal. There's a difference their. You're reporting a squeal which is quite different from a buzz and caused by a different component.

And I'll still argue the "modified sinewave" is "damaging" to a power supply.

You're barking up the wrong tree. Just get an RMA from Antec and move on.

[SparkyJJO]

What UPS is that?

APC

[crackhead2k]

the "smart line" is real the BACK-UPs is modified im pretty sure... i got a PCP&COOLING SILENCER 750 :) exchanging the antec. What do those caps do anyways jonny? and secondly leaking what... im not an expert on power supplies.

Thanks :)

[Polizei]

Most caps, unless otherwise stated, use oil as a dielectric. A cap is 2 pieces of metal separated by a dielectric (something that doesnt conduct electricity), which allows them to store a charge. This storage of a charge allows a power supply to minimize ripple, which is the gap between the peaks of the AC sine wave.

Leaking? The oil within the cap. That would cause squeal.

[Symptom]

I also asked this question in "my own (http://www.xtremesystems.org/forums/showthread.php?p=2829727&posted=1#post2829727)" thread.. But ill post it here too..


I have and UPS..

Just a quick story.. My previous PSU had a buzz(the UPS also had a weak buzz), also when the PC was off.. One day, the UPS said "Overload", and turned off the power to the PC..

I then connected the PC directly to a power-outlet, and the PSU exploded.. gay..

I got an Back UPS from APC (http://www.apc.com/resource/include/techspec_index.cfm?base_sku=BR800I), and I just mailed them about the buzz sound I had from my previous PSU, and asked if an UPS could damage the PSU..

In this thread, someone said..
"If your UPS output is not a true sine waveform then you have that squeal and
"issues" that can 'kill' the PSU longterm."

I got an reply to my mail and they said:
"It is a sqware wave output UPS." (Not true sine waveform?)
and
"Power Factor correction powersuplly with Energy Star 4 compliance does not work
together with any backUPS."

And the Corsair hx620w has Power Factor Correction, but what is Energy Star 4?

Edit: If anyone is interested, I posted the same question on Corsair's forum.. (http://www.asktheramguy.com/forums/showthread.php?t=67537)

[C'DaleRider]

I also asked this question in "my own (http://www.xtremesystems.org/forums/showthread.php?p=2829727&posted=1#post2829727)" thread.. But ill post it here too..


I have and UPS..

Just a quick story.. My previous PSU had a buzz(the UPS also had a weak buzz), also when the PC was off.. One day, the UPS said "Overload", and turned off the power to the PC..

I then connected the PC directly to a power-outlet, and the PSU exploded.. gay..


Edit: If anyone is interested, I posted the same question on Corsair's forum.. (http://www.asktheramguy.com/forums/showthread.php?t=67537)



And in that thread you said you "accuse my UPS of killing the PSU.."

Now, correct me if I misunderstand, but your UPS shut down your power supply because it detected a short or overload condition or some fault coming from your power supply.....and you disconnected it from the UPS and plugged the ps directly into the wall socket and the ps blew up, right?

So, if I'm reading this correctly, the UPS was trying to SAVE your power supply from exploding/failing, yet you removed the UPS from the loop and when the ps got power, unfiltered power, it blew up.

So how did, exactly, the UPS kill your power supply? It sounds more to me like your UPS was doing its job and your power supply was about to fail catastrophically.....which it did when you plugged it into the wall socket.