Voltage fluctuations in the 240V network and acceptable standards

Hello.
I think the thread has already been here, but I can't find it.
For about a month, I have been noticing the dimming of lamps, microwave fans, LED lighting, etc.
Today I decided to take measurements with the Sanwa PC5000a meter - I think it is sufficient for reliable measurements.
Finally, I measured 3 phases just at the output of the meter in the main distribution box and it turned out that at the time of measuring the voltage they were respectively 200, 215 and 215v
My question is, is this acceptable?
Because an employee at 911 said that 10-15% is acceptable, which means that this fluctuation would be within the norm.

I would like to add that the whole problem began when the construction of a large housing estate was completed several meters away.
I have heard that they have to put up a transformer and so far they cannot connect the housing estate (they cannot connect it to the main street line, but they have to draw electricity from another ...
But I see that some residents somehow have electricity in their apartments.
Recently, I have lost quite expensive electronic equipment and I wonder if it is not for this ...
I will be grateful for your advice.

Best regards.

This is specified in the relevant provision: http://www.ure.gov.pl/ftp/prawo/rozporzadzenia/rozp-dzu93poz623_29-05-2007.pdf chapter 10 par. 38 point 3.

I understand +/- 10% from 240V? So if I note that there is 205 V on one phase, for example, can they say that it is temporary and ignore it?

Dude +/- 10% and yes, but in Poland the voltage is 230 volts.

Well, that's how it is on the border.

Well, if even -15% is acceptable, then I suspect that everything is normal. You have to get used to dimming lights, slowing fans etc ...
I just hope that it does not destroy the led lighting under 230 V because it rains quite often and I have to replace it.
I am surprised then that they even accepted the application.

Thank you, Maciej, for the information, I just wanted to point out that the measurement error can be excluded.
I just recorded a quick jump from 205 to 195 and back again. Generally, I recorded a short film with tensions in case they said tomorrow that everything is ok because it is around 220.

Can I pick it up with an oscilloscope?

We'll see what the gentlemen from Eneia will say. I bet that the transformer does not work through the new housing estate and hence such things.

aksel_pl wrote:

We'll see what the gentlemen from Eneia will say.

If I know life, they will measure it with an ordinary multimeter, see 208V and say that it is good, nothing for them.

Well, that's what I'm afraid of too ... any ideas ...?

Request a network analyzer, because your equipment is damaged, you have epilepsy and you cannot stay in rooms where the light is blinking. In general, the more persistent and resolute you are, the more seriously they will take you.

Thanks a lot, that's something
Currently, I have a constant 204v also great ... I am curious if this quality corresponds to the losses in power transmission and energy consumption or are they too low values?

PS
Is it allowed to record a conversation with energy workers with a camera?

masonry wrote:

In general, the more persistent and resolute you are, the more seriously they will take you.

Even the most annoying client who shows signs of a layman will be treated with bulldozer. Better results are obtained when neighbors are joined together and a "collective" complaint - although this is sometimes impossible, it is worth asking whether someone has similar symptoms (preferably from different places in the area supplied by a given transformer station).

I am planning to visit two neighbors tomorrow and measure the tensions on the phases. The question is simply if there is any reason to do so. Is what I have described really should be "fixed"? Or is it such a small problem that it's not worth worrying about?

I suppose that he will not agree to the recording and he has the right to do so.
If it is only a temporary voltage drop and it doesn't happen all the time, you can get used to it and give it up. What you describe is not some wolf hello again. From your posts it appears that it is a multi-family building, so any damage does not have to be on the ZE side. Something may be happening at the building's WLZcie, and this already belongs to the owner, not to ZE.

[quote = "aksel_pl" I am allowed to record a conversation with energy workers with my camera? [/ quote]
As far as I know, they are not office workers or public figures. They do not have to speak at all in front of the camera, that's why they have "spokesmen".

aksel_pl wrote:

Is what I have described really should be "fixed"?

First of all, you need to determine what is the cause. Voltage fluctuations and fired electronics may indicate a PEN burnout. It can be in the provider's network but also ... at your place. Voltage fluctuations in your neighbors are one thing, but reliable measurements of your installation from the boundary of ownership are another.

I carried out the measurements at the meter output, so there are only the power plant cables in front of it. It seems to me that at this point I can not have too much influence on the voltage, especially if no welders are connected.
Of course, I do not have enough knowledge here, so I can be wrong, or in the case of a month ago everything was ok, that is, before the commissioning on the estate began. I am not 100% sure that the estate has a connection with it, but I remember that a year ago no one was supposed to have an electricity permit because there was no transformer, and suddenly over 100 apartments were built, and the transformer will be put up ... hence my guesses.
I would like to remind you that the problem occurs in all three phases, but it is not the same. I know that the house is definitely connected with two phases, but as I have a 3-phase control in the box, I suspect that all 3 are connected.
I also made measurements in sockets and in the home section, and the voltages there are the same, because with fluctuations it is difficult to say whether they are exactly the same if one person does it :)

Generally, this hesitation is more and more noticeable, it didn't bother me before, but now it's starting to irritate me. I have a fan that runs once as if it was in 1st speed and once as if it was in 2nd speed, although I do not change anything.
However, the problem with incident led "bulbs" lasts longer.
I remember that half a year ago I left the RGB strip turned on for the night, the alledrogo one and in the morning here and there the red chips did not glow anymore and the red ones are the most susceptible to fluctuations.
Even now I remembered that very often I have to replace the usual small 12v bulbs that I have in the spider chandelier. There are still some burnouts. - Of course, it does not necessarily have to do with the quality of the electricity.

I'll stock up on this invention, but not right now
In general, I am very grateful to everyone for their help, because people here are not always so willing to share their knowledge

but if your devices burned down, the power plant would pay, wouldn't it?

aksel_pl wrote:

but if your devices burned down, the power plant would pay, wouldn't it?

He would have to prove it first. And how can you prove it without some kind of failure like a blown PEN?