High Household Voltage Fluctuations: Experiences & Changes in Polish Power Grid Since 2013

Question

This topic has already been discussed, but in 2013 and since then, a lot has changed in the Polish power grid. In October I had a reconstruction of the low voltage power grid on the street. Constant power outages prompted me to buy a UPS. Until then, I was convinced that the mains voltage should...

jharlan · Answer

The permissible deviation is +/- 10%, i.e. from 207V to 253V. Not And what is the accuracy of the measurement?

retrofood · Answer

Report the topic of the energy supplier, maybe it is enough to regulate the voltage with taps on the transformer.

opornik7 · Answer

But what is he supposed to report? That his voltage is normal?

CYRUS2 · Answer

For something to be damaged, the voltage must exceed 270V AC.

In terms of equipment damage, the standard does not guarantee safety.
There is no record that 253V is a limit that cannot be exceeded even for a time, e.g. 0.1sec.
253V is just the average of the measurements over time.
If the voltage in the network exceeds 350V for 0.1 sec, this average will be approx

Near the transformer, the voltage is probably overestimated so that at the end of the line there is approx
In such a situation, I would advise to protect valuable receivers - against the effects such as the voltage "jumps higher". There are no protections against the voltages of 300V-400V in the installation.

Anonymous · Answer

What is your installation in the apartment? Is it three-phase? Significantly inflated voltages are sometimes caused by a stuck-badly contacting zero.

barytek · Answer

The installation is three-phase.

retrofood · Answer

That he suspects the tension goes beyond the standard. He does not report to the prosecutor either committing by someone a crime, but suspicion of committing . The consumer is not authorized to judge whether the voltage is normal or not. It is up to the experts to investigate it.

jharlan · Answer

When N gets hot to the end it will be 400V ? 10%

retrofood · Answer

It will or it will not. It depends on the degree of load unbalance.

DJ ANNUS · Answer

At my previous location there was 250V nonstop and it is still used today. And it was the 3rd pole from a large 400kVA transformer. in the countryside. The upside is that the mower on the extension cord still had a lot of power and I could do something for myself, e.g. aluminum rims or other delicacies. I have not noticed any heat damage to the equipment. But the voltage was stable at 250V.

jharlan · Answer

Rather, it will be closer to 400 than 270.

retrofood · Answer

Rather not necessarily.

BILGO · Answer

Quite normal, the load on the network dropped quickly as people disconnected their loads before the storm and the voltage had to increase as a result People in the area said the thunderstorm was gone, so they turned on most of the receivers that were operating before the storm came. Normal. The one closest to the transformer is the worst In general, there are voltage fluctuations in the network, it cannot be avoided ...

jharlan · Answer

This is a logical explanation, but let N check it. There is also the question of the accuracy of the measurement.

BILGO · Answer

An overhaul of the installation won't hurt. Knowing life, an electrician recently saw the installation as he made it ... this is the reality in the construction of single-family houses

tom_bart1 · Answer

It is more likely to disconnect another MV line supplied from the same substation, or to disconnect one of the HV lines supplying this substation. ARN automation works with a certain delay.

CYRUS2 · Answer

PEN burnout within the network is the asymmetry of many receivers - this is averaged. The PEN break for a single object is worst. Because then the asymmetry is not averaged, you can expect 400V on the receiver. Varistors in equipment cause chain reactions. The varistor gets a short and gives clean phase to another receiver.

bizon_126 · Answer

I would like to have such a supply voltage, because Saturday evening at my place is 190 V, sometimes not even all of it
There was a conversation with the energy industry but I didn't hear anything concrete - they have it in ...

opornik7 · Answer

Advice for the future, do not talk, just write a letter with a request to provide energy with parameters in accordance with the contract.

DJ ANNUS · Answer

I reported it, situation as above. they arrived, measured at the pole around 11.00 when the consumption was the lowest and they went, apparently it was normal. You can dream that they will come for the measurement at 7-8 am or around 5-20 pm. But still, at 15kW, I have a 199V phase in the hourly interval as above. At 32A it drops to 160V. And each compressor included causes such a load.

Darom · Answer

Apply for an analyzer. They will have a 24/7 cross-section regarding stresses and loads. kisses - GIFT-

bizon_126 · Answer

They came exactly at noon with the meter at the meter and said that it was ok and they did not see the problem, sat down and went
Let someone prove himself and make a measurement Saturday evening as in every other house, a 2.0 kw heater heats the water often densely to the oven and not to mention the street light
When I once welded a sheet metal, it started to weld well after 23 - everyone is asleep and when the street ones turned off it was quite a fairy tale

zbich70 · Answer

But who is to prove himself? Forum readers are to prove themselves - come to Olkusz and install a recorder? Can he write a letter to the supplier for you?

bizon_126 · Answer

The management is probably Będzin, I don't even know exactly A neighbor wrote letters and they were twice during office hours, i.e. at noon, and they found no groundless accusations

zbich70 · Answer

Then write a letter stating that the problem only occurs in the evenings on public holidays. The energy emergency works 24/7 so it shouldn't be a problem. But if you write as carelessly as here on the forum, be aware that you will be treated as carelessly.

bizon_126 · Answer

I work from 7 am to 5 pm so I do not have much time for such dealing with officials

zbich70 · Answer

So what? You can't do it until 5 p.m. because you are working. Not after 5 pm either, because then you rest. So, in your letter to the supplier, state what hours you are satisfied with.

bizon_126 · Answer

After 5 p.m. I have other duties
The truth is that it would be best to throw the transformer closer or, if such an option is an option, put a strand through the village instead of 30-year-old lines
I have a kilometer to the transformer, maybe not all, and I do not have a tip

DJ ANNUS · Answer

Buddy, if you want to do something, e.g. an autotransformer on some pole, then you need to talk to someone who can do something. Or, with the neighbors, make a harassing and polished attack on the PGE hotline or whatever you have there, because if they have a report, they must react. This was also the case with street lighting, I called 7 or 10 times and they came and finally they discovered that one lamp short-circuited after some time and extinguishes the entire street.

High Household Voltage Fluctuations: Experiences & Changes in Polish Power Grid Since 2013

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