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Anonymous Poster

Transformer Calculation

02/08/2008 6:26 AM

how we calculate the MVA rating of the transformer according to the load

and its per unit impedence..?

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Guru

Join Date: Dec 2007
Location: Cypress Calif
Posts: 741
Good Answers: 23
#1

Re: Transformer Calculation

02/08/2008 8:58 AM

Well the first part seems straightforward enough, add up the combined loads and throwing 25 to 50% for Murphy or expansion. "A good engineer is a wee bit conservative at least on paper"

1. Vpu = v

IM just kidding, found this link while I was trying to figure out exactly what you were talking about, I hope it will be of some help. However your use of the word minimum is scary, I'm not kidding about Murphy leave enough to cover him.

http://www.ece.msstate.edu/~donohoe/ece3414per_unit_system.pdf

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Member

Join Date: Jan 2008
Posts: 8
#2
In reply to #1

Transformer Calculation

02/09/2008 3:04 AM

thanks for this cocern..bt i know per unit calculation ..i need exact method for calculating the rating of any transformer and its percentage impedence...

kindly give in detail

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Guru

Join Date: Dec 2007
Location: Cypress Calif
Posts: 741
Good Answers: 23
#3
In reply to #2

Re: Transformer Calculation

02/09/2008 8:05 AM

Now I am curious to, I had assumed you were looking to set up multiple transformers, i.e. production facility. If you can provide a little more information about your application it might be helpful.

PS I had read Read a couple of posts when I responded. Somehow I was thinking you were looking for the minimum requirements, to feed multiple transformers.

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