Yes exactly! But it seems like the breakers for the internal circuits were turned back on repeatedly by whatever system was doing a "reprise automatique du cour

Yes exactly! But it seems like the breakers for the internal circuits were turned back on repeatedly by whatever system was doing a "reprise automatique du courant".I guess that means UPS power back ups, but why would those not be shut off automatically either by the fire alarm or just the breakers? Maybe they weren't, it's not really clear, but it's surprising to me that the breakers would not cut all current if they are damaged? Do fire-safe breakers exist?