Can anyone explain how the vector diagram of a transformer which doesn't

Can anyone explain how the vector diagram of a transformer
which doesn't have name plate be found whether it is
Dy11/Dy5/Yd11 and so on?

Question Posted / skrnoopuram

4 Answers
12913 Views
TATA, I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

Can anyone explain how the vector diagram of a transformer which doesn't have name plate be f..

Answer / geno peter

well , we can find the vector group by doing vector group
test

Is This Answer Correct ?

13 Yes

1 No

Can anyone explain how the vector diagram of a transformer which doesn't have name plate be f..

Answer / loke

Ya ! first of all you can decide Yd or Dy by seeing it
primary & secondary connections and 1,2,3....11 we can
decide it by doing vector group tests int that we can check
phase shift of wave form & we can conclude

Is This Answer Correct ?

7 Yes

0 No

Can anyone explain how the vector diagram of a transformer which doesn't have name plate be f..

Answer / k.prakashchandra

Whether Dy or Yd can be ascertained from the bushings.To
find particular vector group ,CRO can be used finding
relationship between the current vectors.e.g.In Dy 11 I2R
lags I1R by 30 degrees Number 11 denotes position of minute-
hand in a clock.It can also found out by taking various
voltage measuremnts and analysing

Is This Answer Correct ?

7 Yes

0 No

Can anyone explain how the vector diagram of a transformer which doesn't have name plate be f..

Answer / kalidass

Yah! can.
If Dy11
Primary winding having only 3 terminals with high
resistance and secondary havign 4 terminals with low
resistance.

If Yd11
Primary having 4 terminals with high resistance and
secondary having 3 terminals with low resistance.

If Dy5
This is not a verctor group.

Eppdi???

Is This Answer Correct ?

8 Yes

30 No

Post New Answer

More Electrical Engineering Interview Questions

we have require a Motor (1500kW, 6.6kV, 50Hz) which shall operate at 1500rpm during 30min and after it shall run on 500rpm during 15min. The same cycle shall be repetitive during the whole working days. Which method is best and economic to achieve such type of task. VFD, VVFD, Pole changing motor etc.

0 Answers MTN,

how the magnetic flux is said to be rotating & alternating?

4 Answers

what is electricity.

6 Answers HP, L&T,

What is line resistance of cable & how it can be measured ?

0 Answers

what are types of servo motors

1 Answers

I have a relay contact rated at 220v dc which is supplied with a 24vdc from the panel,for it to trip the dampers(24vdc).What if the application of the relay changes so that it should work at its rated 220vdc then will it work at 24vdc supply given or any other consideration needs to be taken .....

0 Answers

what is the function of CRGO in a Transformer?

6 Answers

what is the physical phenomenon because of which skin effect occurs ??

6 Answers Power Grid,

What is a slack bus?

0 Answers

can I connect 25KvA stepdown transformer(RYB-440V,UVW-240V) to the output of 15KvA,3-phase online UPS(440V phase to phase)please brief.

1 Answers

What are the types of piano switches?

0 Answers

how does this job compare with others you have aplied for?

0 Answers

For more Electrical Engineering Interview Questions Click Here