1. According to the constant power algorithm formula:
W:Power provided by each battery W
P: UPS rated power, VA
F: load power factor, 0.8
η: inverter efficiency, 0.95
N: UPS rated number of cells per battery pack
Calculation
Capacity is 225KVA UPS single battery section number is 64, each section 6 single battery.
According to the UPS actual carrying rate will not be higher than 80% of the rated power, so the selected battery discharge power should be greater than 493.42 * 80%, that is, greater than 394.73w can be.
According to the LIRIS 12V200AH battery discharge constant power table can be derived, 60 minutes discharge power is 212.0w, choose 2 groups of batteries, that is, the discharge power is 424.0w, to meet and greater than the actual backup time requirements.
AH: capacity of each battery
P: UPS rated power, KVA
h: Discharge time, in hours
N: UPS rated number of sections per battery pack