Understanding Transformer Capacity: 250 kva, 440 input, 220 output

[neduet]

Hi friends

If I have three phase 250 kva Transformer, 440 input and 220 output then
Can I say that it can bear 568.2 amp current or 1136.3 amps?

 

[dlgoff]

Your transformer can provide 250kva to a load. So you'd have 250kva/220v.

Assuming your "output" is where the load is attached.

 

[m.s.j]

It can bear 328 amp current in input side(440 V) and 656 amps in output(220V).

S=1.73*V*I
S input=S output

 

[neduet]

It can bear 328 amp current in input side(440 V) and 656 amps in output(220V).

S=1.73*V*I
S input=S output

Sir

how can you calculate. you use S=VI

 

[dlgoff]

Sir

how can you calculate. you use S=VI

I probably should wait for m.s.j to answer here. S = 3 phase VA (volt-amps) = V*I*sqrt(3). Sorry I didn't include the sqrt(3)=1.73 required in the equation since you were asking about 3 phase.

It can bear 328 amp current in input side(440 V) and 656 amps in output(220V).

S=1.73*V*I
S input=S output

I totally missed that the OP said "three phase". Thanks for the sqrt(3).