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muhamedhaneefa
Participant

Join Date: Apr 2008
Posts: 3

transformer

04/23/2008 2:23 PM

calculation step to find out the current in primary and secondary of a 40MVA transformer ,persentage impedence 9.5 ,115kv/13.8kv if apply 480v in primary
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badar
Associate

Join Date: Apr 2008
Location: Riyadh - Saudi Arabia
Posts: 29
#1

Re: transformer

04/23/2008 2:34 PM

you want calculation at 115/13.8kv OR 480V???
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muhamedhaneefa
Participant

Join Date: Apr 2008
Posts: 3
#3
In reply to #1

Re: transformer

04/24/2008 12:59 PM

Mr badar i wanted to get the primary current of that transformer if apply 480v( the secondary is short circuited)
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Anonymous Poster
#2

Re: transformer

04/24/2008 8:54 AM

Are you doing a protection system calibration using primary current injection?

I do it all the time.

haven't had to do it for a while, but I can dig up my notes and send to you.

Most recently had to use a 4160 V injected into a 132KV primary winding of a 100MVA generator step up to test/verify transformer diffential protection 87T and some others.
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muhamedhaneefa
Participant

Join Date: Apr 2008
Posts: 3
#4
In reply to #2

Re: transformer

04/24/2008 1:06 PM

i wanted to do diff test
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