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It wasn't directly plugged into the grid but the report says: >Aucun organe de coupure externe Meaning there was no way to cut external power from going into
by mardifoufs 5y ago
It wasn't directly plugged into the grid but the report says:
>Aucun organe de coupure externe
Meaning there was no way to cut external power from going into the the DC. But the DC also had
>4 niveaux de reprise automatique de courant [very roughly translates to "4 layers of automatic power restart"]
Which I guess kept switching the power back on. So the only way to completely shut down power was by cutting off the building from the grid... with a switch that didn't exist. I don't know anything about data centers but that does not make a lot of sense to me, why would you want your safety systems to cycle back off automatically?
The report also states that the lack of main switch was due to "economic decisions made by the company", but does not give further details about that multi layered restart system
- Nextgrid 5y ago> Aucun organe de coupure externe My understanding of this is possibly that "externe" here means external as in external to the building. Presumably, there was a breaker - it was just in the same room as the fire.
- mardifoufs 5y agoYes 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?