Current per phase

[ftrevino56]

on a 2500 kva 480y/277 transformer we calculated approx 3007 amps, the question is, "Are these 3007 amps per each phase or combined over all 3 phases?

 

[GoldDigger]

on a 2500 kva 480y/277 transformer we calculated approx 3007 amps, the question is, "Are these 3007 amps per each phase or combined over all 3 phases?

What formula did you use to make the calculation?

The three phase power formula most commonly used gives you the magnitude of the current in each of the three lines.
This is NOT the same as the current in each of the three phases (line to line).
It is certainly not the sum of the magnitudes of the three line currents.

 

[ftrevino56]

Current per phase

the formula is (kva x 1000)/(480v x 1.732)

 

[ftrevino56]

transformer

transformer

to clarify a little, this is a pad mount transformer

 

[Fnewman]

In commonly used terms, 3007 amps would be the secondary current for each phase of a 2500 kVA 3 phase transformer. It a number that you would often find on the nameplate.

 

[ftrevino56]

Current per phase

that would make sense it is per phase thank you

 

[Smart $]

that would make sense it is per phase thank you

NO.

It is commonly but errantly stated as amps per phase. The correct terminology is line amperes.

This particular aspect of a transformer is known as the rated primary or secondary current.

 

[Besoeker]

NO.

It is commonly but errantly stated as amps per phase.

Misleading even.