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Anonymous Poster

Cost Comparision

01/15/2011 11:04 AM

Kindly advise which Transformer will be cheaper and why?

400/6.9/6.9 KV ONAF 50/25/25 MVA or 20/6.9/6.9KV ONAF 50/25/25 MVA
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TonyS
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#1

Re: Cost Comparision

01/15/2011 12:02 PM

Homework?

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Anonymous Poster
#5
In reply to #1

Re: Cost Comparision

01/17/2011 6:04 AM

If you don't know one thing, you will always tell ''it is homework''
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Doorman
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#6
In reply to #5

Re: Cost Comparision

01/17/2011 10:15 AM

I believe you may be thinking of me.

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redfred
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#2

Re: Cost Comparison

01/15/2011 12:10 PM

NO!

It is never cheaper to get free advice from a public forum than a paid, licensed adviser. Hire a qualified local electrician/engineer to examine your facility and power requirements. They will know your local wiring codes, the environment the transformer will reside in, and how much reserve power likely required for your facility to grow.

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lyn
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#3

Re: Cost Comparision

01/15/2011 1:21 PM

Ask a transformer supplier. That is if you want to buy one.

They can give you specific answers.
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Tornado
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#4

Re: Cost Comparision

01/15/2011 6:07 PM

The mass of copper in the primary windings would be about the same in each case, but the 400kv winding would be about 1/20 the cross-sectional area and 20 times as long, and with proportionally greater insulation thickness. This makes me guess that the 400kv would be more expensive. Nonetheless, phoning a vendor would be best.

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