SRT8KRMXLI - bypass max. 16A?

[do1212]

TLDR: Is there a way to prevent the UPS to draw more than 16A even if in bypass mode?

yesterday i had some bigger trouble installing a new UPS

Note that this is a german installation, so the 8kVA online UPS is fed by 230VAC 3-phase 16A input

50Hz input, 50Hz output

I burned through two or three breakers wich caused a major unplanned downtime at our customer
I'm not an electrician so all the hardwiring was done by an external electrician.

1. The first mistake was, we overlooked the phase bridge was still mounted and that was when the first breaker burned through.
2. We then noticed that only one of the three outlet groups was delivering power. I restarted all outlet groups including the working one while there was a load attached (approx. 650VA) wich burned antother breaker. And i don't know why. Of course, restarting outlets with attached load is not ideal but the load was not so high it should cause events like this.
The UPS also wrote down an internal error wich caused it to switch to bypass mode, also not understanable for me. The next event said "switching to battery power due to distorted input" wich is expectable because one of the three pahses was down

The problem is the breaker design for the room. There are 6 circuits in the server room: F5.1.1 to F5.1.6.
F5.1.1, F5.1.2, F5.1.3 are the three phase input for the UPS, the other three are single phase normal input, each one 16A.
But that were not the breakers burning through.
F5.1.1 and F5.1.4 are both L1, .2 and .5 are L2, .3 and .6 are L3.
After those first breakers is a second row of breaker, for each phase a 35A-breaker. These ones got burned through. Don't know why.

The electrician assumed there was a too high current on L1. This with the fact that the UPS protocolled a temporary bypass made me think.
In normal operation the UPS does not draw moer than 16A from a single phae and we only have 16A-breakers as first instance (the 35A as second instance)
Is there a way to prevent the UPS to draw more than 16A even if in bypass mode? Or completely disable bypass mode if the load is too high?
Does the setting "Bypass Transfer Mode" have any infuence on this?
Does this kind of UPS usually go to bypass if the batteries are changed?