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
6215 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

is ac supply can store

0 Answers

what is meant by lagging & leading current

1 Answers TATA,

I want to apply for ONGC recruitment 2012 .I am BE Electrical but it is mentioned that to apply for this post you have to have Electrical supervisor certificate .so please tell me from where can i get such certificate ???

1 Answers

sir please send me previous year questions of jspl of electrical section through which i could prepare myself fpr the test.

0 Answers

we have 3*1 MW generator one NGR is common for all it will be selected during paralle our problem is two generator ca be paralled but when slecting third one we need to close NGR selection on third one other wise voltage not matching why?

1 Answers

STATE AND EXPLAIN SUPER POSITION THEOREM.

3 Answers ABB,

How do we calculate tranmission line losses of a 132 KV tranmsission line. Please give some quick tips?

2 Answers

In a 3 phase 4-wire system. For a 3.5 core cable if all loads are single phase and balanced, what will be neutral current? will it be sum of all phase currents? Or it will be zero? And if loads are unbalanced what will be neutral current?

0 Answers

What is D check in a Diesel generator for 1000kva DG

9 Answers Escorts,

Why the transformers are rating in KVA.?

5 Answers ISMT,

Which Kind of machines(in terms of poles) give the smoothest DC

0 Answers

A 400KVA Transformer has 400Hz frequency.if frequency is changed to 50Hz,then what will be the new KVA rating?

2 Answers ABC,

For more Electrical Engineering Interview Questions Click Here