PC problems due to lack of grounding in the outlet
Hello, there is such a problem, the house is an old multi-unit, in the wiring only phase and zero (in the socket). Sometimes there are power surges from 200V to 230V, once a month the light disappears. A stationary PC was assembled, but due to problems with light, I had to buy a UPS. Power supply in a Seasonic focus plus 850w computer, UPS - logicpower 875w.
After a couple of months of use, problems with sound began, periodically when watching a movie, the sound began to lag behind the video, then it hung, a dialog box popped up later, saying that the audio jack is connected is disconnected, and later it turned out that hdd started to pour errors, and after some time to turn off altogether.
By the method of exclusion, I came to the conclusion that the problem is in the socket, due to the lack of grounding, the power supply issues 110v to the case, hdd dies due to the static and the audio jack on the case ends.
I decided to make the outlet neutral, but I want to protect myself and the computer as much as possible. I want to make grounding only in the 1st outlet, connect an extension cord from it, only a PC with peripherals will be connected to this extension cord.
I plan to cut the extension cord and connect some device between the ends that will allow the extension cord to be disconnected in case of phase inversion or something like that.
I was offered to put the RCD in phase and zero, and let the earth go around, it does not solve my problem, because if phase is zero, the current through the ground due to grounding will go to the buildings of the entire periphery, which means I need to turn off all 3 wires in the extension cable.
Somewhere on the forum I read about the circuit breaker + 3-pole contactor, but it is not entirely clear how to connect them and in general there may be a solution where only 1 device can be built into the extension cord.
I really need advice on how to do it right and which device to use
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Hello! They wrote so much, invented new terms about phase inversion, but the main question: if you do not have ground, through which earth will the current from zero go and where? “If the phase is zero” - if you have a two-wire system, what you wrote will not happen, the phase will be zero if the zero burns off at your input, and then the current will not go anywhere.
For 15 years of using and working with computers, I have never met the mythical statics of a killing HDD, can you turn off the torrent client more often and your HDD will not die like that?
It is also unclear what kind of contactor and circuit breaker are you talking about? What will the contactor be controlled from and how will the machine solve problems with it? Zeroing in the outlet will cause a phase on the PC case, in case of ZERO burning.
You don’t need to cut anything, buy a socket voltage relay and you will protect the computer from phase imbalance.
They suggested that you put the RCD if you have real land, and it goes, as you put it, "bypassing". It is unclear why and how do you want to do it?
Zeroing is done so that in case of a phase breakdown on the body, the machine is knocked out. It is like a way out of the situation if there is no grounding, but this will not solve the problem.
“The current will go to the enclosures”, it will go with you. You are going to nullify. The question is the potential for the case and WHAT phase will it be at zero? Is not yours? Read our article on phase imbalance.
It’s not at all clear what you want to remove the static or zero so that there is no potential on the case? Everyone doesn’t die hard, but do you die? Only this is how most computers work.
As for the three-pole contactor - it is clear that you need to hang all three wires of the extension cord on it, but why? You don’t turn it off automatically, you can power the contactor coil from the output of the voltage relay. Then, if there is a warp, all the extension cord wires should be disconnected from the network.
The HDD does not die because of the torrent, but because of the grounding in the PSU itself, the PC cases are almost completely conductive, and the unit in the circuit gives 110V voltage not only on the case but everything connected to it, I have ripples in my headphones, it turns on and off a keyboard with a mouse, yes, only a power supply unit that lacks grounding is to blame for this, it was advised that he would throw the grounding to 0 and in case of any malfunction (phase change, etc.), it would simply cut out the light in the house for security. You can solve the problem only by grounding no other way. I searched 3 days did not find anything
I’ll try to explain more specifically, I didn’t just start to die on the HDD, I also periodically began to notice that when watching a video, on the Internet or on a PC, the sound periodically began to lag behind the video, just once - twice a day it happens that when I listen to music I hear a crack in the columns.
I started to google, it came to the conclusion that this is all static due to the lack of grounding, there are capacitors in the power supply that, in the absence of grounding, divide the voltage by 2 and let 110v into the PC case.
I measured it with a multimeter between the case and zero in the outlet, it really was 110v.
I made a zeroing in the socket, the voltage on the case disappeared, hdd seems to be working without failures, though the tres in the columns still remains.
PS: Reinstalling windows drivers, etc. does not help, on the motherboard there are no bloated capacitors, most solid-state ones, of course there may be something with a PSU but the probability is small, it is high-quality in the first, and secondly for power supply lines 3,5,12v jumps or there are no voltage drops ..
In general, I won’t cut anything, and I won’t put any contactors and relays, I immediately have a UPS after the socket with grounding, a PC is connected to it through the extension cord, while everything works fine, it remains to deal with the periodic cracking in the speakers / headphones