Answer Posted / naveen kumar.b

Ans:- 60Amps MCB

how:-

for 16 battery net voltage is 192Vdc.

For battery low cut OFF voltage fixed in by all kind of ups is 10.5 each battery . so for 16 battery System battery low cut of votage is 168VDC
( :- at time low battery voltage only Dc current consumption is high, we need to take maximum current consumtion for select MCB)

total load we taken= 1oKVA Full load.

DC voltage at time low battery = 168

current consume (at time of low batter)= 10000KVA /168Vdc

current consumption is 60Amps arround

so 60Amps MCB is required

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