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 ?
Answer Posted / ravi v nair
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 |
Post New Answer View All Answers
what is the step by step formula for calculating bus bar phase and neutral size of a panel board.suppose the incomer of panel board is 100A..???step by step answer please
If we impress a dc voltage of 230 V on an unloaded 230 V, 50 Hz transformer it wi A give high secondary voltage B burn out C give secondary voltage as per K D none of these
how to calculate the power factor when instantaneous voltage and current has harmonics in it ?
How do we calculate over and under frequency tolerance from generator data?
how u select control transformer for a mccb panels or any panels?for expample we hav 440 volts maim supply and control volts is 230v?
1.dg on load alarm/stop alarm... 2.dg on load. piu alarm alarm kaise chek krte hai
Is the installation of the filter cloths necessary before spreading the gravels at the transformer yards?
what is mean by transition resistance of transformer?
State kirchoff voltage law?
1)How much current can a 3-1/2 core 100 mm wire carry? 2)What are the special cables required for explosion proof wiring? 3)In case you do not have coal and salt for earthing, how can you achieve good temporary earthing? 4)One horse power single phase motor is more likely to get hot than a one horse power 3 phase motor. Is it true or false, if true why? 5)What are the different types of soft starters for large motors?please explain?
How earthing of switchgear system to be done.
what is a vector protection in transformer
what is arc flash and what are the hazards involved
why any centrifugal blower draw more current in starting. consider id fan and fd fan?
If i am running of spindle at 2000rpm ,but How to spindle stop at the second I am resetting the machine in CNC machines