Connecting the UPS in the switchgear - Where the difference and why

Hello,

I have a question about the system security as in the attachment. I mean the correct selection and location of the residual current device (s).
The situation looks like this: The UPS is in the switchgear room and by default the devices work with the UPS. However, I want to be able to switch in case of any problems with the UPS directly to the mains using the I-0-II modular switch in the switchgear. The receivers are computers and monitors.

Where and what differentials should I put (points 1,2,3 in the diagram). Please take into account the situation when the receivers are working on power supply from UPS batteries.

I am asking for factual answers or possibly another easy-to-use solution.
greetings
T

UPS - APC2200xl
Receivers: standard workstations 6 pcs. (Comp + monitor)
Redundant: B16

tomczy wrote:

The receivers are computers and monitors.

Lack of information. What, how much, what power consumption, which redundant protection, etc.

Peasant reason is none of the above, you have no situation in which one and the same power supply you have protection for two circuits, the one with the UPS and the one without it. By the way, the question is a little pointless, because you do not plug the UPS directly into protection, you do it with the help of a socket and plug the same way computers and since you protect as much as ordinary circuits. Of course, the RCD can give different characteristics.

I skip the matter of connecting the UPS in the switchgear because it will be implemented in the right way. I was thinking about a solution: A type differential in the UPS supply circuit - position 2 in the figure, AC type differential - position 1 in the figure. But what does protection look like when there is no power supply and the UPS is operating "from a battery"?

Don't you notice my post? [Retrofood]

Added after 23 [minutes]:

I noticed and added missing info. I will add here:
UPS - APC2200xl
Receivers: standard workstations 6 pcs. (Comp + monitor)
excess: B16

The best questions are to ask who will allow this installation to use.

Cyrus2 - your answer adds little - unfortunately - to the question ...

Hello, I would solve it this way.

Thanks Marcin. I think your way is worth considering and I will consider it.

Added after 3 [hours] 34 [minutes]:

I just have to add that in this case there would have to be an additional UPS secondary circuit breaker which rather - unfortunately - is not an option ...

Hello- I'm sorry I couldn't see and analyze this connection before.