Upgrading to 3-Phase for 5.5kW Induction Plate: Connection Power and Fuse Calculation Examples

Hello

I am in the process of changing the installation from 1-phase to 3-phase (due to the planned 5.5kW induction plate)
Some time ago, when I asked what Connection Power to provide in the EV application, someone gave me a link to the calculator on the Vattenfall website.

I had a demand for about 8.3kW, so I gave 9kW in the application.
It has a 16A fuse in the connection conditions.

Recently, an electrician who watched what was to be done said that it was not enough and I should have 13kW, so that I have 16A fuses in the premises, not 10A.
He said that the total load is taken on the pre-meter fuse.

Could someone explain me briefly on an example where let's assume an indium album. consumes 5.5kW from 1.2 phases, and the oven from 3 phases consumes 3.4kW = 9kW in total, which translates into the value of security.

The 3.4 kW oven consumes 14.8 A on one phase, which means that the protection of this circuit should be 16 A. The electrician is right.

In this topic, you will find a table with the connection powers and required protections. https://www.elektroda.pl/rtvforum/topic1827860-30.html#8794091 The file named direct_do_stand_ukl_pom.pdf

Hello!

The primary collateral in a household with less than 25A is paranoia due to greed.
Regardless of whether the farm is powered by one or three phases.

Greggy77 wrote:

let's assume the indium album. consumes 5.5kW from 1.2 phases, and the oven from 3 phases consumes 3.4kW = 9kW in total, which translates into the value of security.

Assuming that you do not have anything electric in the apartment except a stove, it is 5.5 + 3.4 = 8.9 kW and you

Greggy77 wrote:

I had a demand for about 8.3kW, so I gave 9kW in the application.
It has a 16A fuse in the connection conditions.

Don't you see any error in assumptions here?
And then people cry that their pre-meter fuse is out and why you have to pay for sealing.

To the user zdzisiek1979 .

Thanks for the tip.
On page 5 of the guidelines in the table I read that for 3-phase 9kW the pre-meter current is 25A. I am from Łódź, so I have the connection conditions issued by the same ŁZE Dystrybucja which the guidelines apply to.
So why did they give me 16A (which corresponds to 3-phase 1kW in the table) instead of 25A?
Is there any mistake on their part? Can I advertise it somehow referring to the guidelines?
They made a mistake once, because when I went to them to collect the conditions, the request was prepared for my wife's registration address (second apartment on the same floor).

To the user dent .
I wanted to simplify the example as much as possible so that it was 3-phase = 9kW in total.

There is something wrong with this chart. In my region (Świętokrzyskie), the value of pre-meter collateral is selected differently. Alone at home, I have 18 kW 3-phase connection power and 32A protection. Besides, I do not agree with single-phase protections. Eg 35A at 4kW ?!

I do not know, gentlemen, what is wrong with it, but once someone gave it to me, I would read it and that's it and I kept it on the disk because it may be useful for something
Since they gave a colleague in the guidelines protection from 16A to 9kW, then, counting for a 3-phase network, the current will be around 13.6A, so 16A is enough with a tiny margin.
There is always a sheet of paper, a pen, a calculator and a pattern