[Solved] Connecting HAGER SFT440 or Schneider I-0-II 1P 20A iSSW A9E18073 Switch in a 3L + N Installation

Hello, I'm planning to connect to the electrical system in the emergency generator building.
I am thinking of buying a HAGER SFT440 or Schneider I-0-II 1P 20A iSSW A9E18073 switch, some questions arise.

There is a 3L + N installation in the building, but the building only works on one phase, therefore this switch will be replaced by one switch, but the following question arises whether the neutral conductor of the aggregate is connected to the neutral conductor of the building, i.e. it is connected with a similar switch as the phase does he also have to be independent?

An additional question is it good to use any protection on the Aggregate - Switch line (e.g. Aggregate -> Fuse -> Phase lamp -> Overvoltage switch -> Differential -> Switch)?




As for obtaining appropriate consent, I have this fact and I'm in the process.

kanareczek89 wrote:

Schneider I-0-II 1P 20A iSSW A9E18073

You can't use it.

kanareczek89 wrote:

the building has only one phase

Hmm and the installation is 2 or 3 wires

On the electronic wholesale website, the iSSW Schneider switch is in the category of network switches - aggregate - hence my question.

The installation is under reconstruction but will be on 3 wires, L - N - PE.

I have the entire installation on Schneider components, therefore for aesthetic reasons the question arose about this switch.


Added after 2 [minutes]:

kanareczek89 wrote:

On the website of the electronic wholesaler the Schneider iSSW switch is in the category of network switches - aggregate

Various nonsense write ... this switch is single-track and you have to disconnect L and N from the network, so it must be 2P if the power supply is single-phase.
another matter is the rated current of this switch or the preceding protection is not higher than 20A

kanareczek89 wrote:

The installation is under reconstruction

You are renovating and leaving the entire building on one phase

kanareczek89 wrote:

phase lamp -> Overvoltage switch -> Differential

You should have all these devices in the switchboard regardless of whether you are planning a generator.

So the switch for L and N -> So it would be best if I bought a 3P + N switch immediately (e.g. Hager STF440) - in the event that a 3-phase aggregate should be used?

Alternatively, can two Schneider switches be used, one for L and N? (still aesthetic considerations)
So the whole building stays on one phase - the use of a phase replacement, the other two supply other buildings with much higher power consumption.

It is about the Aggregate - Distribution line itself (cable 5 x 5 ^ 2). There is already a B + C surge protector in the building, and each room has its own set of type disconnector, control lamps and differential

kanareczek89 wrote:

So it's best to buy a 3P + N switch right away (e.g. Hager STF440)

The thing is that Hager SFT440 is not a 3P + N disconnector and you can't use it, it's a 4P disconnector

kanareczek89 wrote:

Alternatively, can two Schneider switches be used, one for L and N? (still aesthetic considerations)

No, you can't and I don't see the reason for such stucco since there is a 2P switch -> https://sklep.elzap.pl/przelacznik-schneider-a9e18074,4,33480,23347

kanareczek89 wrote:

the other two supply other buildings with significantly higher power consumption.

So what is the protection against this switch I'm afraid the 20A switch won't stand the test of time.

there is a set of (and even more) protections in the switchgear, but the question was "Do you want to use any protection on the same line Generator - Switch?" and should the neutral of the aggregate be connected with the same switch to the neutral of the network?

How is the electric shock protection implemented in the building? From the statements I conclude that this is the TT system (cascade for this system made?) And the aggregate certainly not ...
Portable low power aggregates (which usually occur) are not suitable for connecting a collective home installation, but for powering a receiver equipped with a 230V or 400V plug. What does a colleague propose? How will it achieve the effectiveness of protection against electric shock? - because in this section we do not deal with the design of installations, and this is quite a serious matter.