Hi all,
I need some help on sizing a transformer for an upcoming job. It's a new restaurant in a shopping plaza. The service coming in the building has a 200 amp 3 phase 480v panel, what's the largest transformer can I install to get 3 phase 120/208? I'm not sure how much power would be needed since the customer does not have the spec for the equipments. I would like to install a 3 phase 120/208 400 amp panel just to be safe. Is a 150kva transformer good for 400amp? 208*400*1.732/1000=144kva, is that correct? Is the existing 200amp breaker ok for the primary size?
I need some help on sizing a transformer for an upcoming job. It's a new restaurant in a shopping plaza. The service coming in the building has a 200 amp 3 phase 480v panel, what's the largest transformer can I install to get 3 phase 120/208? I'm not sure how much power would be needed since the customer does not have the spec for the equipments. I would like to install a 3 phase 120/208 400 amp panel just to be safe. Is a 150kva transformer good for 400amp? 208*400*1.732/1000=144kva, is that correct? Is the existing 200amp breaker ok for the primary size?