Delta connected transformer jumpers 1

[splitbolt]

I have three single phase 250 KVA transformers 2400 V pri / 480 V sec. The primary is why connected on 4160 V supply and the secondary is ungrounded delta connected. The load conductors are connected to X3 on each transformer and the delta connection jumpers are connected from X3 on each transformer to X1 on the next transformer. If the transformers are loaded to max KVA how much current will flow on the jumpers.

Thanx for any replies

 

[jghrist]

250 kVA / (0.48 kV * sqrt(3)) = 300A

 

[busbar]

250kVA / 480V = 521A {rated coil current} Sounds like homework.

 

[jghrist]

Oops, I didn't read the problem. :-(

 

[alehman]

0 amps

 

[jghrist]

I agree with busbar.

 

[jbartos]

Suggestion: There have to be certain criteria stated. Namely, the transformers have beginning and end markings on the secondary coils. The coils must be properly connected to obtain the proper rated three phase current configuration in the secondary windings of the three phase transformer.