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Calculation Sheet for-6 UPS:-1. No. Of Batteries and Size
Calculation for 6 kVA Online UPS with 30 min Backup:-i. Known
details (FYI mentioned on UPS Catalogue):a. Load of UPS: 6 kVAb.
Power Factor: 0.9c. Efficiency of UPS (in Eco Mode): 93 %d. Total
Cell Voltage (end cell voltage): 10.5 Volte. No. Of Battery: 20 No.
(DC Voltage Requirement is 240 Volt)ii. Calculation and Formula
Used:a. I DC (Amp.) = (Load X 1000 X Power factor) /(efficiency X
Total Cell Voltagex No. of battery)= (6 X 1000 X 0.9) / (.93 X 10.5
X 20)
= 27.64Amp.b. For Ampere-Hour Calculation for your reference:
-
Above mentioned discharge current in point i.e. 27.64Amp, now as
we require 30min. back up then from graph we
recommend 12V/26AH battery which can give around 30 min battery
backup.
So we suggest to use 12 Volt 26Ah, SMF Grade Batteries for
around 30min. backup for 6 kVA UPS.
ratnakumar.bCalloutThe current rating (Idc) achieved is not the
final rating.ABB has to apply the following factors to achieve the
final current rating.For that current rating with 30 min back up AH
rating shall be selected.> Aging factor> Design margin>
Temperature correction factor
ratnakumar.bOval
