Utility Transformer Sizing
Utility Transformer Sizing
(OP)
Hello, I need to size a utility transformer that will be feeding a large commercial building. My main distribution panel is rated 3000A at 120/208V. Therefore, I have sized the transformer to be 1MVA. But, the utility's customer transformer guidelines state that a 1000kVA transformer's maximum aggregate service panel size is 8800A? Whats going on here? (The transformer is oil filled)
Thanks for the input,
Daniel
Thanks for the input,
Daniel






RE: Utility Transformer Sizing
RE: Utility Transformer Sizing
This where the #4/0 AL often meets the 750 kcmil copper!
As David said, the utility is taking the risk, not the customer. For a large utility, the core loss savings alone can be significant.
David Castor
www.cvoes.com