TO operate transformers in parallel, vector symbol of the both should be same.

TO operate transformers in parallel, vector symbol of the
both should be same.If one transformer name plate is not
there, how can we conclude that whether the transformer is
having the same vector symbol or not?

Question Posted / ravikumar josyula

4 Answers
6987 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

TO operate transformers in parallel, vector symbol of the both should be same.If one transformer n..

Answer / guru

Check the vector group by carrying out VECTOR Group testing
( By Injecting a 3 Ph 440v or 230 V to the primary windings
and check the voltage between the terminals in secondary
side)

For each vector group there are standard values which has
to come in the secondary side

Is This Answer Correct ?

1 Yes

0 No

TO operate transformers in parallel, vector symbol of the both should be same.If one transformer n..

Answer / rajendran

we can easily find out and confirm the vector group of the
transformer by using the standard test procedures.

Is This Answer Correct ?

3 Yes

3 No

TO operate transformers in parallel, vector symbol of the both should be same.If one transformer n..

Answer / mgalalkhedr

This vector group test is done at site to check if their is
any damage in the windings during transportation and
erection.
3 -phase AC supply is given on HV side. R-Phase HV and r-
phase LV shorted.

Then to qualify the test following conditions are to be
satisfied after measurement of voltages.

nR+nY=RY, By>> Bb and Yb=Yy.

Is This Answer Correct ?

0 Yes

0 No

TO operate transformers in parallel, vector symbol of the both should be same.If one transformer n..

Answer / mahboob

in such acase we can find the vector group by conducting
vector group test the we can proceed

Is This Answer Correct ?

1 Yes

2 No

Post New Answer

More Electrical Engineering Interview Questions

What is Black-out and Brown-out situation in the context of voltage stability in power system?

1 Answers

what is the differnce between high impedance relay and low impedance relay

4 Answers Areva,

I am getting above 60 V as open delta voltage against single phase unit ICT at tertiary delta formed and ICT getting trippped on NDR. ICT tested and found in order. PTs provided on tertiary are tested and in order. what may be the reason?

1 Answers

Why indicated only R.Y.B to phase.

6 Answers Bhel,

what are the safety of chiller.

7 Answers

how to calculate transformer turn primary & secondary side 11kv to 420v

0 Answers

what is the minimum insulation resistance for HT AND LT motor ?

3 Answers

What is class X ct? What rare its uses?

2 Answers

If ROC does not lies inside unit circle,then ? a) Fourier transform converges b) Z transform converges c) Hatly transform converges d) Colpit Transform converges.

0 Answers CCP,

why most of the substations are rated in multiples of 11?

4 Answers

mounting of bucholz relay engle on transformer

4 Answers

how gen. load increase or decrease ? what happen with gen on that time

2 Answers

For more Electrical Engineering Interview Questions Click Here