Let's say we have a MCB and MCCB with 16A rating. MCB will trip based on the curve type, say if B curve is used, it trips between 3-5 times the 16A. Therefore, the instantaneous pickup would be anywhere between 48-80A.
For MCCB, at what current the pick up woul be? (any thumbrule?.
This is to decide to use MCB or MCCB for the final circuit as the fault current would be lower for the final circuit and pondering over if the MCCB could clear for the end of line fault.
