Equipment needed to tackle a typical low voltage fluctuation

Xampp Apache
July 24, 2017 at 10:49:20
Specs: Windows 7
Please suggest an equipment for my home problem:

A very small low voltage fluctuation (visible only on my room's tube-light) causes my PC (attached to an UPS with transfer time 4 to 8 millisecond) to reboot.

This low voltage fluctuation is such that it does not allow my UPS to kick in. So I need a circuit breaker (i guess) which detects this low voltage/current and trips the circuit real fast.


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#1
July 24, 2017 at 13:35:51
If the UPS isn't working as intended it may be defective. Do you know what is causing the low voltage condition? I have a Kensington Masterpiece Plus Surge/voltage protector under my monitor. Have had this device for close to 20 years. When Edison turns to voltage down the Kensington has a Red low voltage light and an audible tow to let you know the voltage is low. I have measured the voltage at these time and it can go down as low as 108V. Even then, my PC doesn't shut off. I don't use a UPS at all.

So, either your computer power supply is providing dirty power or the PSU is bad. Either way, your solution is not the way to go, IMHO.

Post the model and specs of your power supply.


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#2
July 24, 2017 at 14:30:34
Very much agree with OtH... Identify and resolve the cause of the problem, rather than simply apply what is in effect a fudge...

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#3
July 24, 2017 at 14:49:49
Side note, but your PC should be just about as robust as any other modern computer controlled tech plugged into your home. If it's more sensitive than the surrounding equipment, it may be a sign that the PSU is beginning to fail.

How To Ask Questions The Smart Way


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#4
July 24, 2017 at 17:49:37
Your "UPS" is a Backup type, not the online UPS type, hence the switching time.
http://www.apc.com/us/en/faqs/FA157...

Small voltage Fluctuations should not cause a reboot. However some BIOS features (Surge protection) could act on that.

Any idea what causes the voltage fluctuations? Any heavy machinery in your neighborhood?


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#5
July 24, 2017 at 20:21:56
Have you had an electrician look at it?

--Yes but it's a dry heat.


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#6
July 24, 2017 at 21:20:06
I would point to BOTH the power supply as being worn out or poor quality and needs replacing AND the UPS being inferior and poor quality and not up to protecting your system.
Aside form that are you really sure that it is a power fluctuation that is causing your problem and not something else hardware or software related?

You have to be a little bit crazy to keep you from going insane.


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#7
July 25, 2017 at 08:52:42
Ok, here are the specs:

UPS: APC BX600C-IN [ http://www.apc.com/shop/in/en/produ... ]

PSU: Corsair VS 450 [ 1 year old still under warranty ]

APC has already changed the PCB of UPS and according to them this model provides TRANSFER TIME in the range of 4 to 8 ms.

Hence, this typical low voltage fluctuation lasts < = ~ 4 ms and the UPS never kicks in.

The only thing that comes to my mind is FAILURE of the primary CAP of PSU (holding time is now very low) is causing the reboot.

I will RMA my PSU , actually i want TO DETECT WHAT IS CAUSING THIS TYPICAL LOW VOLTAGE FLUCTUATION ( may be <= 4 ms and is only visible on the tube-light of my room).

Yes, I have already called an electrician he has checked all the loose wire fitting but was not able to detect the reason. No, there is no HEAVY MACHINERY @ MY HOUSE OR IN NEIGHBORHOOD.

There is HIGH PROBABILITY OF SOMEONE PLAYING PRANK as we live in apartment with power lines, meter , and main supply switch, is in common area of the building and accessible to all.

Thanks for your efforts and quick reply.


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#8
July 25, 2017 at 10:18:04
How often does this happen? If practical, try running the computer without the UPS in the mix to see if the computer still drops out.

Your PSU is a good unit. Post the remainder of your specs.

I don't know how anyone could cause a low voltage condition that on;y lasts that short a time.

I have run into this before. The service entrance cables to the meter and from the meter to the breaker panel are usually Aluminum. The proper installation requires a special paste be applied to the ends when installing them. This wasn't always done. At any rate, the lugs may need tightening because the Aluminum is malleable resulting in a loosened connection. If this happens, any surge from equipment starting can cause a temporary drop in voltage.

Edison recently checked my connections and found them to be quite loose.

DO NOT try tightening them yourself.


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#9
July 25, 2017 at 10:56:05
2 to 3 times daily and sometimes no reboots. I mean I can notice the fluctuation on my room's tube-light when the reboot occurs and do not hear any UPS transfer sound.

There were also some reboots when I was not near my PC.

Specs:
Windows 7 (UPDATED TILL TODAY) and event Manager shows KERNEL POWER ERROR 41(63).

Processor: Intel Pentium G3220
RAM: Corsair Vengeance 4x2=8 GB DDR3
HDD: 1 TB Seagate Barracuda 7200 RPM SATA 2
Optical Drive: Asus Blu Ray writer.
Graphics: MSI GTX 750 Ti
Monitor AOC 15 inch LED (uses 2 USB 3.0 for POWER)
Keyboard and Mouse: 2 USB 2.0
Network Adapter: TP-link TL-WN722N USB 2.0
Motherboard: Gigabyte-H81M-S1
Cabinet: Cool Master 311 Elite
PSU: Corsair VS 450

You MEAN I SHOULD GET ALL aluminium wires checked and paste be applied to the ends before tightening them.

message edited by ls_milkyway


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#10
July 25, 2017 at 11:10:32
At this point in time, just have your electrician check them for tightness, if they haven't already done so.

Are you overclocking?

I hadn't heard of monitors that are powered from USB controllers.

Does the shut down occur at idle, or under power?


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#11
July 25, 2017 at 13:11:26
Aluminum wiring... Never been high on my list for reliability - only cheapness.. Copper is much better but of course is more money...

I'd be seriously looking at quality, the state of connections all round at the very least; ideally the actual wiring too... And if you have to have any wiring replaced - use copper. Remembering too that you have to use specific boxes/sockets/switches for aluminum or copper. I seem to recall they are not to be mixed up; copper with copper spec'd sockets, swtiches, aluminum with aluminum spec'd sockets etc.

Loose connections somewhere can cause voltage fluctuations - as the way N.Am wires homes etc, requires a balanced load across the neutral cct at the box. An imbalance - even momentarily (due to loose/poor connections at least) can produce fluctuations in one leg or the other of the house ccts. - volts might go up - or down slightly briefly... - depending on the nature of the imbalance.

If you have a less than purrfekt PSU, and/or UPS - then they likely will not be happy with the situation...

Anyone who has had to provide power to tv/film productions on the road will know all about load balancing the power ccts they provide for lighting and associated tv kit... Be that source of the power a generator or "house/local supplies... And if filming in a location which requires stable mains distribution (e.g. hospital, care homes etc.) any professional lighting type (lighting cameraman, gaffer or whatever) would opt for a generator first. If having to use local supplies they would negotiate with the local house electricals to provide a stable, no threat and ideally isolated from any critical areas, bus-bar output; which would then enable/allow the film/tv unit to connect its own disconnects boxes to that mains feed - knowing they were no risk to anyone in critical areas.

Besides checking "all" accessible wiring connections around the house, not the least on the distribution box (fuse/mcb box), I'd ask a knowledgeable electrician to check the load balance - the neutral current flowing in the system at the box (He'll use a Fluke or similar to read the neutral current - it goes/clamps around the neutral cable).

http://www.cromptonusa.com/Neutral%...

https://en.wikipedia.org/wiki/Elect...

https://en.wikipedia.org/wiki/Split...

https://diy.stackexchange.com/quest...

Canada/USA (and some other countries) use the split phase system of mains distribution around the home; the +ve half cycle is one leg of distribution - occupies one side of the fuse/mcb box; the -ve half is the other side. When the two sides are equally loaded there is no current in the neutral at the box... In the UK and most of Europe they use a single phase fed around the property


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#12
July 25, 2017 at 14:58:22
It could not hurt to purchase a plug in tester to check if the outlets are properly polarized and grounded unless the electrician is coming anyway,th en he would have one available.

You have to be a little bit crazy to keep you from going insane.


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#13
July 26, 2017 at 02:43:53
Nope, I am not overclocking my processor or gtx 750 ti.

USB powered monitor: http://www.aocmonitorap.com/ph/prod...

My PC is never idle (i mean there is a download task or mining monero is in progress or video encoding etc..) when ON and there is no shutdown but it's reboot.

There is no software glitch the same thing was working well 2 months ago and possibility of any kind of malware infection is 0.

Thanks for your responses (specially trvlr and onthehill). I guess I need to hire a professional to get all the wirings checked and then later I will select the best answer.


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