Dear sir,
In my case, The 11 kv/433 V ,3600 KVA transformer shortcircuit current is 76KA.So i have selected ACB rated for 6000a,Ish=100KA which is going to feed for PCC having 3 nos of 250KW motor , 1 no chiller compressor of capacity 586 kw , 2nos of pumps of capacity 90KW and 2 nos of cooling tower motor of capacity 110KW.All are running with 80%.How to i have to select the MCCB with Ish for PCC incomer and outgoing MCCB rating the loads mentioned as above.What are all the things to be taken for calculation.Pl explain in details.........