Hello,
I have a project requiring an additional 25KVA of 120/208V loads to an existing building, and am trying to decide if I can get away without increasing available transformer capacity.
Incoming feed is 600V three phase on a 300A breaker from the facility main service location.
This feeds a 150KVA, 120/208V transformer via a 200A breaker.
This in turn feeds four subpanels via 2x 4#250MCM
Panel B (Kitchen) 53 KVA
Panel C (Level One) 30 KVA
Panel D (Level Two) 25 KVA
Panel E (Level Three) 34 KVA
Total 142KVA
On paper the additional 25KVA pushes the transformer into overload, but it seems incredibly unlikely that the actual load would be anywhere near maximum (this is three story a college building including a kitchen)
I welcome advice from other engineers regarding best practices in this type of situation.
thank you
I have a project requiring an additional 25KVA of 120/208V loads to an existing building, and am trying to decide if I can get away without increasing available transformer capacity.
Incoming feed is 600V three phase on a 300A breaker from the facility main service location.
This feeds a 150KVA, 120/208V transformer via a 200A breaker.
This in turn feeds four subpanels via 2x 4#250MCM
Panel B (Kitchen) 53 KVA
Panel C (Level One) 30 KVA
Panel D (Level Two) 25 KVA
Panel E (Level Three) 34 KVA
Total 142KVA
On paper the additional 25KVA pushes the transformer into overload, but it seems incredibly unlikely that the actual load would be anywhere near maximum (this is three story a college building including a kitchen)
I welcome advice from other engineers regarding best practices in this type of situation.
thank you