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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 ?

Answers were Sorted based on User's Feedback

On a 10 KVA UPS we have to provide a DC MCB for Battery bank of 16 nos (12 V 65 AH). What Shall b..

UPS is 10 KVA, and battery is 65AH

Hence if it is a 1 phase UPS

KVA = V*A
10000 = 240*A
A= 10000/240
A = 42 A full load

Approximately a 63 A MCB would be required

 Is This Answer Correct ? 21 Yes 7 No

On a 10 KVA UPS we have to provide a DC MCB for Battery bank of 16 nos (12 V 65 AH). What Shall b..

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.

 Is This Answer Correct ? 14 Yes 0 No

On a 10 KVA UPS we have to provide a DC MCB for Battery bank of 16 nos (12 V 65 AH). What Shall b..

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=52.08
we need a 55A DC MCB

 Is This Answer Correct ? 7 Yes 2 No

On a 10 KVA UPS we have to provide a DC MCB for Battery bank of 16 nos (12 V 65 AH). What Shall b..

ans is roung

 Is This Answer Correct ? 6 Yes 3 No

On a 10 KVA UPS we have to provide a DC MCB for Battery bank of 16 nos (12 V 65 AH). What Shall 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)

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

 Is This Answer Correct ? 2 Yes 0 No

On a 10 KVA UPS we have to provide a DC MCB for Battery bank of 16 nos (12 V 65 AH). What Shall b..

1.5A

 Is This Answer Correct ? 1 Yes 2 No

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