Xfrmr size

[Alwayslearningelec]

If I need to have 250 amps on my 120 208 volt side but my source power is ,277/480 I can use a 75kva xfmr and run 125a wire then step it down??

 

[infinity]

You said you need to 250 amps on the 208Y/120 volt side. What's the maximum output of a 75 kva transformer?

 

[augie47]

 

[don_resqcapt19]

If I need to have 250 amps on my 120 208 volt side but my source power is ,277/480 I can use a 75kva xfmr and run 125a wire then step it down??

208 V x 250A x √3 = 90.1 kVA