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How to calculate the ups battery back up? give the formula.
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Answer Posted / sathiyanarayanan
backup formula= KVA/DC LOW *POWER FACTOR
FOR EX:2 KVA/120 DC VOLT(SYSTEM VOLT)OUR MAINTAINED POWER
FACTOR (0.8 P.F),PER BATTERY=12V(DC LOW=10.8),HERE USING THE
SYSTEM VOLT=120V SO,10 BATTERIES-10*12=120V
DERIVATION : 2000/108*0.8
AH=14.81(APP.17 AH BATTERY) given 30 minutes backup
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