3 ms·
> The problem with water in the same place with high power equipment […] Most high-end UPSes have a relay where you can run an active-high or active-low emerge
by throw0101a 6y ago
> The problem with water in the same place with high power equipment […]
Most high-end UPSes have a relay where you can run an active-high or active-low emergency power off (EPO) signal. The EPO can either be a button that is pressed manually by the staff, automatically via fire suppression system, or both/either.
Schneider-APC white paper (PDF)
* https://download.schneider-electric.com/files?p_File_Name=ASTE-5T3TTT_R5_EN.pdf https://download.schneider-electric.com/files?p_File_Name=AS...
The EPO can also cut-off the HVAC so oxygen is no longer fed into the area, and smoke isn't (re-)circulated.
In the US, this is probably covered in NFPA 75, "Standard for the Fire Protection of Information Technology Equipment":
* https://www.nfpa.org/codes-and-standards/all-codes-and-standards/list-of-codes-and-standards/detail?code=75 https://www.nfpa.org/codes-and-standards/all-codes-and-stand...
- gmueckl 6y agoSuch a switch doesn't make any remaining battery charge in the UPS go away magically. If the UPS housing gets breached (e.g. ingress of impure water or bending/melting from heat), you're back to square one.
- throw0101a 6y agoBatteries can be held in a different room than the IT equipment and UPS inverters--up to 200m per the manual of the APC Galaxy VX. So can have the more common water fire suppression in the day-to-day areas where people are more likely to be in, and have have non-water solutions. Water mist instead of 'traditional' sprinklers is also a thing in many places: * https://res.mdpi.com/d_attachment/energies/energies-13-05117/article_deploy/energies-13-05117-v2.pdf https://res.mdpi.com/d_attachment/energies/energies-13-05117...