Redundancy

[Peter Granasy]

I see some good exchange on redundancy but I have still a question:
if I have 2(N+1) what level we consider temporary solution, I mean grid, diesel generator is a constant back-up but UPS runs out after a ceratin time. Is there any standard governs how long a solution should work to be considered a back-up?
Thx

[Robert Badar]

Hi Peter,

I'm afraid that there is no standardization for power supply backup time, all it depending on your needs. Battery UPS can supply power only to hours limited time, diesel generator several days without fuel refilling.

Best regards

Robert

[Peter Granasy]

Robert,

Thx. Can I ask you some further questions privately as I do not want to do on public domain?

Thx

Peter