keeping in view of parallel operation which of the 3 phase transformer connect

keeping in view of parallel operation which of the 3 phase
transformer connection are possible?
a)delta-delta to delta-star b) delta-delta to star-delta c)
star-star to delta-delta d) delta-star to star-delta

Question Posted / minakshi

4 Answers
24173 Views
Ecil, Siemens, I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

keeping in view of parallel operation which of the 3 phase transformer connection are possible? a..

Answer / nadeem

B.delta-delta to star-delta not possible parallel
operation.
C.star-star to delta-delta that is possible parallel
operation.
D.delta-star to star-delta also that is possible parallel
operation.
A.delta-delta to delta-star not possible parallel operation
but im not conferm.

Is This Answer Correct ?

50 Yes

10 No

keeping in view of parallel operation which of the 3 phase transformer connection are possible? a..

Answer / ravi

For parallel operation of transformers as you know the
requirements, 1. magnitude of the voltage, 2. phase angle
difference between the i/p and o/p voltages, 3. equal
percentage impedance of the transformers.

I don't think that whatever you are asked configurations
same vector symbol will get. So we can't do paralleling.
if you get the same phase angle difference ypu can go ahead
with paralleling.

Is This Answer Correct ?

16 Yes

10 No

keeping in view of parallel operation which of the 3 phase transformer connection are possible? a..

Answer / vikas tomar

If the transformers are star-star or delta-delta, they can
not be paralleled with star-delta or delta-star,As there
will be the phase difference of 30 degree b/w the secondary
voltages for the same supply voltages across the primaries
of the two transformers.It will result the circulating
current in transformer windings.
Hence option (d)is correct answer.

Is This Answer Correct ?

6 Yes

0 No

keeping in view of parallel operation which of the 3 phase transformer connection are possible? a..

Answer / sourabh

A)delta-delta or delta star is possible

Is This Answer Correct ?

6 Yes

10 No

Post New Answer

More Electrical Engineering Interview Questions

What are documents to be required for export of the material?

1 Answers Siemens,

Convert a star connected network into a delta connected network.

0 Answers Syntel, Visa,

WHAT CAUSED THRESHOLD VOLTAGE TO EXIST?

0 Answers

how to calculate the fault in substation

0 Answers

what is d check in dg 1500kva

0 Answers

What is lifting power for 1 wb/m2 and 1 A magnet?

0 Answers Techno Labs,

How to clear BHEL written test exam.....anyone having experience pls refer me the link were i can get BHEL question papers....

1 Answers Bhel,

what is the basic paramter to set a electric drive

1 Answers Alpha,

what is the main different between distribution transformer and power transformer ?

7 Answers Sail,

what types of electrical & mechanical test conducted in switchyard?

0 Answers

How to calculate current carrying capacity of copper conductor _ such as cable size 25sq mm,50 sq mm, 75 sq mm, 100 sq mm

2 Answers

when we catch any one of the phases with our both hands in air(without touching ground),our body acts as a conductor.is it correct.please clarrify it.

4 Answers

For more Electrical Engineering Interview Questions Click Here