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Windows 7: Advice Needed for UPS setup

30 Jul 2015   #11
GokAy

Windows 7 Ultimate x64 SP1
 
 

These are the surge protectors I use:
SurgePro 7-gang - Surge Protector | Surge Protectors | Surge Protectors | Products | Tuncmatik Pure Power - ?yi Elektrik
SurgePro 5-gang - Surge Protector | Surge Protectors | Surge Protectors | Products | Tuncmatik Pure Power - ?yi Elektrik

Both UPS are set up now, I tried the TV side today and it was alright.
Haven't tried the PC UPS yet.
Though the real test will be closing the breaker for the living room, sometime during the day.
Ultimate test will be during a black out.

Another question
Does the battery last longer if, say, only modem/router is running (everything else on standby or shut down)?
If UPS powers 1200W for ~10-15 minutes, will it power 120W for ~100-150 minutes?


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30 Jul 2015   #12
Barman58

Windows 10 Pro x64 x2 Windows 10 Enterprise x64, Ubuntu
 
 

If you do a search online for UPS calculator or UPS load calculator you should be able to check times etc, [of course UPS is also a major shipping company so you will have to filter these out ]

example here ... UPS System Load Calculator | Tripp Lite

you may find that the manufacturer of your devices have a bespoke calculator for their products on their sites
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30 Jul 2015   #13
GokAy

Windows 7 Ultimate x64 SP1
 
 

Couldn't find a good page (branded ones work with their own UPS models) but found this page How to calculate battery backup time & AH capacity against UPS KVA rating? | CrazyEngineers

Quote:
UPS Backup [in hours] = Battery Ah * Volts * Power Factor/Load

We need power in VA. (Load in watts)/pf gives VA.

Volts here representing the battery voltage and load in watts. If powerfactor is unknown, use 0.8 as a rule of third.
So for my TV (not sure if cable will work during a black out but anyway), UPS has 4 batteries:
UPS Backup [in hours] = Battery Ah (4x7) * Volts (12)* Power Factor (0.8)/Load (150) = 1.792 hours (if I am not doing any mistakes )
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30 Jul 2015   #14
Ranger4

Windows 7 Home Premium 64 bit sp1
 
 

I think you have made a mistake on your calculation on the total time you can run the UPS during a power failure.

You seem to have used the sum of the AH of the batteries. usually the batteries are wired in parallel so you still only have 7 AH, not 28 AH.

When the batteries are wired in parallel the current draw is spread over the 4 batteries in this case, so the while the amperage draw may be say 20 amps, one 7 AH battery would flatten fairly quickly, but with 4 the time to flatten them will take in theory 4 times longer. Effectively each battery in this case would have an amperage draw of 5 amps.

To test the TV after you set it up with the UPS etc. Just turn off the power at the wall switch & see how long it go until the UPS shuts down.
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30 Jul 2015   #15
GokAy

Windows 7 Ultimate x64 SP1
 
 

Hmm, yeah you are right, I guess. Please see the picture I took before removing the dead batteries (so I wouldn't forget how they were wired ). It seems the batteries are series of 2.

Advice Needed for UPS setup-20150724_161153120_ios.jpg

I will test the TV like that when I get the time.


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30 Jul 2015   #16
Lady Fitzgerald

Win 7 Ultimate 64 bit
 
 

A UPS isn't practical for long term power supply; a backup generator is far more practical (and I have thought about getting one). A UPS is primarily for, when the power goes out, keeping something running until there is time to safely shut the equipment down. It can also provide the transition from when the power first goes out and a generator can fire up and start providing replacement power.

I got mine after one summer we had frequent blackouts, often several times a day, over a two or three week period until an elusive, intermittent short in an improperly spliced underground cable was finally found and our el cheapo absentee slumlord could be convinced to shell out the shekels to do a proper repair (replaced the missing section of conduit and pull new cable). I got an oversized UPS, not so I can run a long time after an outage, but to ensure my computer would get properly shut down even if we get multiple outages in a day without time for the batteries to recharge between outages. I also wanted the extra capacity for future expansion (such as the three 24" monitors and powered HDMI splitter that recently replaced the single 22" monitor I had when I got the UPS). Even though I have 1 hr. 44 min. run time showing right now, my UPS is set to automatically shut down my computer five minutes after an outage first starts. That both allows the computer to keep running if I all I get are short power blips and provides enough time to get the computer automatically properly shut down (hibernated, actually, so I don't lose any unsaved work) unless I need a few extra minutes to finish something, in which case I can intervene, then manually shut down.
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30 Jul 2015   #17
Ranger4

Windows 7 Home Premium 64 bit sp1
 
 

That picture sure does clear up the issue. Yes it does seem they are wired in pairs so the effective voltage from them would be 24 volts, but the amp hourage is still 7 AH.

As the voltage is now 24 volts the amperage draw will be half what it would be with only 12 volts.
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30 Jul 2015   #18
GokAy

Windows 7 Ultimate x64 SP1
 
 

Jeannie, you are right. I am not planning on running the devices during an outage either, especially the PC (I don't leave it unattended for extended periods, and usually shutdown).

Now, I sleep in the living room, got used to the sound from TV it's my lullaby. I should get awake due to the warning beeps from the UPS, however in case I don't it will be nice to know it will run long enough.

For me the most important reason to using them is cleanly shutting down the devices and avoid unclean energy when it first comes back.
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30 Jul 2015   #19
Ranger4

Windows 7 Home Premium 64 bit sp1
 
 

You are correct Lady F. I have a back up generator, needed here because of power outages during storms etc. & I have used it on a number of occasions. I have it wired into the household system so I just change one switch, start the generator & I can run everything in the house very much as I usually do, except I do have to limit how many elements I use on the stove at any one time. It's 240 volt, 7.5 kilowatt petrol engined generator.
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30 Jul 2015   #20
GokAy

Windows 7 Ultimate x64 SP1
 
 

I am living in an apartment by the way, they would probably kick me out if I start a generator in the house

The next apartment has one to power elevator and lights and I can hear it running from 50meters with windows closed during blackouts.
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 Advice Needed for UPS setup




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