Thank you for the details. I stand corrected on the power and maybe panel space. istm that 64 225A 3ph breakers would be a drop in the bucket on a project as seemingly large as this one is.
Just my 2 cents re: connecting any new loads to any UPS system, is to megohm the new feeds to the load bank, all the standard testing, etc. prior to energizing on any UPS system.
Reason's:
There could be something wrong with the load bank, if it's not serviced, certified and/or tested by a third party.
If it's a clients load-bank or yours, I would test the operation of the unit first on a non-UPS circuit.
When connecting any load bank to any UPS system, the clients requirements are typically, to take the UPS system into bypass or wrap the critical load out of the loop.
Without seeing the upstream diagram to clearly, you're also going to be limited to the individual sub panel/if applicable 225amp breaker's.
That includes adding new transformers that the subpanels etc. that are fed off of UPS critical power and go through either a statics which type system or a rotary type system.
The potential for inrush current is high, on any new connected device and could, "depending on the phase angle of the transformer or new connected load" create a significant enough inrush current to trip part of or your entire system if, you do not test prior on a utility circuit.
It's the same as adding a new PDU on a raised floor space or room, when the equipment purchased that you bought or borrowed has been sitting for a long time, the magnetic core of the xfmr will lose its phase shift and primary/secondary energy.
Good luck on the project!
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