Upgrading to 3-Phase Power for Boiler, Cooker, Heater in Old Building

Hello. He is renovating an apartment in an old building. All electrics have been replaced. The problem begins with connecting it to the network. The power industry ordered to make a 1-phase connection to 5kw because it was there. The electrician said that it was not enough because the apartment was to have a boiler, electric cooker, electric heater, washing machine etc. connected. I will add that a 4-wire cable enters the apartment.
The installation in the staircase is old. I am asking for a hint if the electrician is right?
and whether the power industry will agree to 3 phases, if not, I am asking for suggestions on how to connect the installations to the network so that it does not catch fire. Thank you and best regards

Hello!
Col. Electrician is right.
Report to the Power Plant for new connection conditions, three-phase io
increasing the power allocation.
best regards

Ps.
(I will add that a 4-wire cable enters the apartment.)
And why not 5-wire

You can apply priority attachment. Ie. when e.g. you turn on the stove, it disconnects the boiler ultimately a cheaper solution because you pay more for a 3-phase meter and higher power allocation.

A colleague of Keshan is right.
You go to the nearest utility company or energy region and submit an application for the issue of grid connection conditions. In the application, you write what type of power supply system (single or three-phase) you want to have and the value of the power you want to have installed, and the power plant on the basis of this application will issue connection conditions, in which the scope of work that the recipient must perform at his own expense will be given, as well as the scope of work that will be performed by ZE.
According to the regulations issued by the Energy Regulatory Office, the plant has 14 days to issue the conditions for connecting to the grid and there is no question of any plant.
Conditions have to be issued even if the power had to be pulled directly from the transformer station
Of course, it will hurt a bit (read costly).
For now, I propose to stay with a single-phase power supply, but the meter and distribution box should be mounted as for the three-phase power supply. An electrician will know how to do it if it is necessary to change the system to a three-phase one.

And what regulations were issued by the Energy Regulatory Office? I have always thought that in Poland the regulations are issued by the Parliament and the Council of Ministers. Has the constitution changed recently?

Are you working for Kaczorek at ZE? Your advice is to the detriment of the questioner. What the founder of the thread mentioned can work freely on a 5kW connection. Today I watched the production of "professionals" of your type. They installed a 200kVar capacitor bank for the client and the client pays for reactive power anyway.
Why am I writing this? You won't understand anyway.

I can be wrong, but if not, add the power that your devices have and multiply it by 0.4 you should get the actual power requirement

Added after 3 [minutes]:

and besides, in my opinion, a single-phase installation should be enough for you, if you now have main 25A (max for a single-phase installation) is an increase in power to a minimum reasonable protection 3 x 25A will cost you about PLN 1000 plus ASX plus security sockets etc.

ADAMUS1978 wrote:

and besides, in my opinion, a single-phase installation should be enough for you, if you now have main 25A (max for a single-phase installation) is an increase in power to a minimum reasonable protection 3 x 25A will cost you about PLN 1000 plus ASX plus security sockets etc.

max. for a single-phase installation it is 7.5 kW (35 A) in our ZE.
like a colleague sylany he wanted to apply for new connection conditions for a 3-phase power supply, for 25 A it is already 13 kW and then a fee of about PLN 1,200 would have to be paid. this connection fee includes the replacement of the connection by power-up to 3-phase. the performance of the installation from the operating limit is already the responsibility of the recipient.

And what is the shape of a colleague marek_ka that gives such a rating?
I know people who can judge everyone in advance, but they do not see themselves very much anymore.
Maybe you had to read the post to the end or read about three times to read that I was proposing to stay with single-phase power.

Sciema with this 3-phase installation on 5 wires. ZE demands (without legal grounds) such an exit from the house to the plot border, but they connect their installation only on 4 wires.
As for the fees for increasing the power, you pay for the difference, not for the whole. So if I have 8 kW and I want to increase it to, for example, 14 kW, I only pay for 6 kW, now we have something about PLN 115 per 1 kW. Only what makes sense, it is only stuffing the ZE cabbage and so they are not able to limit your power to the one allocated to you. If you have an installation from the border with an appropriate cross-section on your side, then in the case of increased consumption, their cables will fry, not yours.

And yet they limit. Enea in gorzów uses TSO-type power limiters manufactured by ETI. They don't have a short circuit, and the sensitive overload is like hell. It is sealed and cannot exceed the power allocated. Power is assigned with specific values, e.g. 5, 12, 16 kW. It is impossible to order 13 kW and have 25 A security. Such a number is certainly passed in Wrocław, maybe in other plants as well.

And referring to the electrical equipment in the apartment, it is quite a burden to do with it and you would have to know the power of individual devices to express yourself, whether 3 phases needed, or not. It might work for one room, but not necessarily for a standard two-room apartment with a kitchen and a bathroom.

pit455 wrote:

max. for a single-phase installation it is 7.5 kW (35 A) in our ZE.

I was slightly confused by the given value of 35 A. If it is to be a fuse current, 32 A is usually given in the series. Or maybe something has changed?

Such limiters can be installed on new lines and new estates - a fact. However, if someone writes that he has a single-phase installation and in the house he changed (renovated) the old installation, it means that he has to connect as old as the house is and on such installations the power supply does not assume any limiters because and where, on the poles? If they wanted to use these limiters everywhere, then each EV would go bankrupt.

Yes, they do. In the conditions, the provision states that the measurement system should be prepared for the new power supply conditions, using the TSO, etc., and for sealing.
You have a meter in the apartment, you buy it yourself. You have a plot, they will put you a measuring cabinet with OSP in ene and you will not buy it. And in old construction, if you want to have 3 phases, you do a new WLZ from the connector. The main thing is to sift as many problems as possible onto the recipient.

oneill wrote:

And in old construction, if you want to have 3 phases, you do a new WLZ from the connector. The main thing is to sift as many problems as possible onto the recipient.

And this, apart from the higher costs, speaks in favor of keeping the current connection. However, you need to use a priority relay for the boiler (the stove and washing machine probably fit in 5kW, and if not, the second one for a washing machine), e.g.

Link

I corrected the broken link. [Luke]

brofran wrote:

I was slightly confused by the given value of 35 A. If it is to be a fuse current, 32 A is usually given in the series. Or maybe something has changed?

As a bull in the application for the definition of connection conditions, there is a table with security values for individual connection capacities. For a single-phase system and a protection value of 32 A, the maximum power value is 6.8 kW, and for 35 A -7.5 kW.