What Determines UPS Battery Autonomy Time for Critical Systems?

[asya04]

If bidder applies one UPS (Dual redundant type) system for DCS, ESD, FGS and Telecom in CCB, Satellite rack room and Substation as company recommended, what is the UPS battery autonomy time among 1 hour and 4 hours?
how to calculate it?

 

[CalcNerd]

Please define autonomy time? Are you looking for a reliability calc or just a load calc?

 

[dlgoff]

It depends on what battery chemistry is involved. Lead-Acid maybe?

Anyway, check out this fine reference: http://batteryuniversity.com/learn/