On a 10 KVA UPS we have to provide a DC MCB for Battery bank
of 16 nos (12 V 65 AH).
What Shall be the current rating of DC MCB ?
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Answer Posted / kathirvelan.j
Battery banks are always connected in series so the total
voltage of the battery bank will be
12*16=192V
10KVA=10000VA
A=10000/192=52 Amps
But we need to consider the safety margin of atleast 125%
on the MCB rating and also there are only standard current
ratings are only available in the market so by considering
all these reason we can go for a 65Amps DC MCB.
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