You have gone on repeatedly and in depth about the breakers possibly not having thermal properties. Yet the answer was easily found because the part number was given by the OP.
Originally Posted by Ingenieur
It has been a long thread, but I don't recall that the OP was able to tie a definitive external event, like a power loss or sag, to the tripping of the breakers.
Blindly turning up breaker Short Time and Instantaneous (magnetic) settings may be becoming 'frowned upon' in today's Arc Flash Incident Energy minded environment.
FWIW, I have a meeting, later today, where we will likely be discussing the risk to operations, and possible reduced equipment damage, from shutting down a data center rather than letting an arcing fault continue.
Just because you can, doesn't mean you should.