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Active Contributor

Join Date: Oct 2008
Location: Kottayam, Kerala, India. Now at Qatar
Posts: 10

### Transformer Vector Group

09/22/2012 9:01 AM

How we can test the vector group of transformer. If the client wants to confirm that the vector group is Dyn11 as indicated in the transformer name plate, how it can be done?

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#1

### Re: Transformer Vector Group

09/22/2012 10:49 AM

Study this first: How to Search the Internet

Then you can find this: how to take vector group test

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Luck comes and goes. Skill is forever. Intelligence either is, or it ain't. lyn
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#2

### Re: Transformer Vector Group

09/22/2012 3:16 PM
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Join Date: May 2008
Posts: 817
#3

### Re: Transformer Vector Group

09/23/2012 1:20 PM

Dear Mr. Johnsly,

In this CR4 Forum itself, plenty of postings made and you can search here in CR4 itself and get the details.

DHAYANANDHAN.S

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Join Date: Oct 2009
Posts: 1884
#4

### Re: Transformer Vector Group

09/24/2012 10:16 AM

The following is the procedure for Vector Group Test of a Dyn11 trafo.

i) Bond terminals 1U & 2u with a 2.5 sq.mm Copper wire.

ii) Apply 3 phase 415V, 50 Hz. supply to terminals 1U-1V-1W

iii) Measure the voltages across the following:

1U-1V, 1U-2n, 1V-2n (Equation: 1U-1V = 1U-2n + 1V-2n)

1V-2v & 1V-2W (Equation: 1V-2v = 1V-2w)

1W-2v & 1W-2w (Equation: 1W-2v > 1W-2w)

With the measured voltages, confirm that the equations in the brackets are true. If so, the trafo is Dyn11.

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dhayanandhan (1); electricalexpert65 (1); lyn (1); nobodysomebody47 (1)

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