Delta Transformer

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tkb

tkb

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MA
If you had three 500 kVA single phase transformers with 13,800 primary and 480 secondary connected delta to delta would I have a 500kVA 3? transformer or a 1,500 kVA 3? transformer?

I have looked in the Ugly's book and the American Electricians Handbook and I believe the output current for this setup would be about 1,800 amps at 480 volts thus making it a 1,500 kVA transformer.
 
tkb said:
If you had three 500 kVA single phase transformers with 13,800 primary and 480 secondary connected delta to delta would I have a 500kVA 3? transformer or a 1,500 kVA 3? transformer?

I have looked in the Ugly's book and the American Electricians Handbook and I believe the output current for this setup would be about 1,800 amps at 480 volts thus making it a 1,500 kVA transformer.
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Is this a homework question? This is a commonly asked question on NETA exams. Draw it on a piece of paper and the answer will be clear.
 
That's what I thought.
It has been a lot of years since I had to think about banking transformers.

Homework? :roll: It's all work, all the time. :grin:
 
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