ISO Transformers

[abdulj223]

If the the KVA rating is 5450 and pf is 1
The primary side of the transformer has a 4.16kv value
The secondary value is 2.08kv and the tertiary is 2.08kv.
I calculated the line current from the secondary as 756amps because I included the tertiary value, is the correct?
Need help

 

[Ingenieur]

I assume wye-wye with an isolated delta tertiary
so no, not 756

diagram or nameplate?

 

[Jraef]

If the the KVA rating is 5450 and pf is 1
The primary side of the transformer has a 4.16kv value
The secondary value is 2.08kv and the tertiary is 2.08kv.
I calculated the line current from the secondary as 756amps because I included the tertiary value, is the correct?
Need help

Are you sure you didn't mean .208kV, as in 208V? Because 2.08kV is 2008V, not an industry standard.

 

[Ingenieur]

Are you sure you didn't mean .208kV, as in 208V? Because 2.08kV is 2008V, not an industry standard.

I think he did this
kva / (2 x 2080 x sqrt3) = 756 A

the 5450 kva is odd too

 

[abdulj223]

I assume wye-wye with an isolated delta tertiary
so no, not 756

diagram or nameplate?

The secondary is delta and tertiary is wye. So what would be the correct way?

 

[Ingenieur]

The secondary is delta and tertiary is wye. So what would be the correct way?

Very unusual
the most common is wye-wye with isolated (unconnected) delta tertiary
the tertiary circulates the unbalance resulting from a wye-wye prim-sec
is the tertiary connected or isolated?


no idea without out a diagram or nameplate

 

[abdulj223]

Very unusual
the most common is wye-wye with isolated (unconnected) delta tertiary
the tertiary circulates the unbalance resulting from a wye-wye prim-sec
is the tertiary connected or isolated?


no idea without out a diagram or nameplate

It's connected (it says dual windings of 2.08kv) and nameplate.