UPS & Conditioned Power

[XBarbarian]

Greetings,

here in scenic Tampabay, Progress Energy loves it's brown outs and flash burps to power.

New Rig is ordered.. Maingear F131 1k psu, 6700 oc'd, 2 x raptors + 3rd drive for data, 8800gtx... and getting a dell 24" lcd... price is down again!...

So, instead of cheese UPS, I realized I should invest in something that not only provides some time to shut down..or just keep me up during a flash brown out..but something that provides a nicely conditioned signal, preferably a nice sine

Seems APC is really the only choice? br1500...cheaper ..ok..but "stepped" conditioning..like 250.. or the nicer Smart ups sua 1500 that provides significantly cleaner output.. pure Sine..but..8cough* 550$..

Anything else I should be looking at.. and am I being over the top here?

*waves*

[jonnyGURU]

I don't know why you would need true sine output. Your 1kW PSU is going to have APFC, so by the time the switching part of the PSU sees the input voltage, the waveform is going to be modified regardless.

I just use a good quality Line Interactive UPS with AVR myself.

[XBarbarian]

Thx for the feedback jonny.. good to know..yea..the sua is probably overkill .. at half the price, the br1500 should be more then enough....

[EsaT]

I don't know why you would need true sine output. Your 1kW PSU is going to have APFC, so by the time the switching part of the PSU sees the input voltage, the waveform is going to be modified regardless.But active PFC circuitry itself might not like squarewave, or at least work so well with it.

This is what "modified sinewave (http://koti.mbnet.fi/tuunaes/Test_protocol_for_ES_C__en_.pdf)" practically means.
How much that looks like sinewave?

It would be definitely interesting to see test results how much input waveform differences affect to PSUs.
I would expect normal squarewave without long zero voltage gaps to be better for APFC PSUs than this modified squarewave.


I just use a good quality Line Interactive UPS with AVR myself.Type of UPS itself doesn't limit outputted waveform...
Only except that practically all on-line UPSes produce sinewave because every electric device is practically designed for sine wave input.

[jonnyGURU]

Type of UPS itself doesn't limit outputted waveform...
Only except that practically all on-line UPSes produce sinewave because every electric device is practically designed for sine wave input.

No, it doesn't. That wasn't my point. I'm well aware that you can get line interactive with true sine and square wave.

My point is that you don't have to go crazy. Line Interactive PSU's are relatively cheap. They provide better "protection" than stand by without being as expensive as online. But I have to point out that you should make sure the UPS has AVR because not all of them do.

Just a suggestion.

[XBarbarian]

jonny, and others...

with a 6700 o/c, 3 hdd's including 2 raptors, and 8800gtx, and 1k psu, and 37" Westy LCD, ..what size for a AVR type power back up do you recommend?

And the AVR feature actually regulates live power it supplies through it's receptacles ( not just when the batteries have kicked in.. correct? )

[XBarbarian]

errr...

sorry..read a little deeper on the site and found this

Dai Yi Shing 0~260VAC variac that gets it's power from a 2000VA Powercom AVR.

here
(http://www.jonnyguru.com/forums/showthread.php?t=579)

*summons Elvis* "thank you very much*

[Spectre]

jonny, and others...

with a 6700 o/c, 3 hdd's including 2 raptors, and 8800gtx, and 1k psu, and 37" Westy LCD, ..what size for a AVR type power back up do you recommend?

And the AVR feature actually regulates live power it supplies through it's receptacles ( not just when the batteries have kicked in.. correct? )

Yes AVR works all the time.

Do you want a UPS or an AVR only?

[jonnyGURU]

Even a 1000VA would give you enough time to shut down in a brown out.

I'd say a good 15 minutes w/ your build.