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Muhammad Salman
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Join Date: Oct 2012
Posts: 2

Isolation Transformer

10/14/2012 3:16 AM

Hi

Can anybody tell me that what is the per phase current of 3 phase, 200KVA Isolation Transformer?
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TonyS
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Location: Resting under the Major Oak
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#1

Re: ISOLATION TRANSFORMER

10/14/2012 6:06 AM

No, not without a voltage.

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Muhammad Salman
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#2
In reply to #1

Re: ISOLATION TRANSFORMER

10/14/2012 6:17 AM

3 phase voltage is 415 volt line to line
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TonyS
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#3

Re: ISOLATION TRANSFORMER

10/14/2012 7:30 AM

278.2A

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wareagle
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#4

Re: Isolation Transformer

10/15/2012 5:12 PM

Muhammad Salman

What is your position?
Are you an engineer?
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Anonymous Poster #1
#5
In reply to #4

Re: Isolation Transformer

10/16/2012 12:00 AM

Hi

If you dont mind can you share the calculation how you got the answer as 276.4A,What is the power factor you have taken,what the formula you have used
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silverfox
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Join Date: Nov 2011
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#6

Re: Isolation Transformer

10/16/2012 3:16 AM

The 278A was right. Where did 276A come from? Power factor????
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Anonymous Poster #1
#7
In reply to #6

Re: Isolation Transformer

10/16/2012 12:30 PM

Its 278 A typing mistake
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silverfox
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Join Date: Nov 2011
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#8
In reply to #7

Re: Isolation Transformer

10/16/2012 12:40 PM

line current

200 000 / 415 / 1.732

where 1.732 is square root of 3.

ans - 278.25A
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Anonymous Poster #1
#9
In reply to #8

Re: Isolation Transformer

10/16/2012 11:47 PM

Thanks for the reply , Is there any isolation transformer which is having power factor more than .8. If so what are they , What are the moderntype of transformer where to reduce traditional loses
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silverfox
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#10

Re: Isolation Transformer

10/17/2012 3:39 AM

Don't you determine the pF by your connected load? Put a resistive load on and you can forget about pF. With a load of lossy motors and inductive lighting .......

On a decent transformer losses will be minimal.

Suggest you get a senior electrical guy on board to check what you are doing.
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Anonymous Poster (3); Muhammad Salman (1); silverfox (3); TonyS (2); wareagle (1)

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