Answer / ganeswar sahu

To check the phase angle displacement between two
windings of a manufactured traformer and to check whether
internal winding connection is matching to the vector group
as mentioned in the name plate .

Answer / raju.t

1. To check the phase angle displacement between two
windings of a manufactured trafo.
2. To check the correctness of vector group mentioned in
the name plate of trafo and actual connection.

Answer / jagdish krushnarao zeliye

vector group of transformer is used to know the phase angle
for parallelling operation

Answer / saba anjum

vector group are made to know at what position the secondary
winding of transformer we get star and delta voltages . and
it indicates the type of winding in primary and secondary
which helps in parallel operation of transformer with
different ratings having same vector group .

Answer / purav solanki.

for the parallel operation of two transformer.

Answer / usama badran ali

vector group analysis used for two important things?
1-it describes the charcteristic of transformers...how?
1-primary and secondary connections.
2-low and high voltage sides.
3-leading angle between high and low voltages.
2-to connect two parallel transformer, you should know the
line to line voltages of two transformer (i mean each
similar line voltages of the parallel transformers ).
3-in the modern technolgy of power electronics in three
phase inverters i can eleminate fixed order of harmonics by
changing the transformer connection .

Answer / saksh

to check the phase angle displadement so as to know the
power factor itis lag or lead

Answer / kulu

TO Check the phase displacement between HV winding and Lv
winding

Answer / ramama

for parallel operation of two different rating transformers

Answer / ganesh nayak

Vector anlysis is done to check whether the transformer
under test is suitable for parallel operation with another
transfomer having same vector group and voltage ratio but
difference in KVA rating.And to know the phase displacment
and polarity of the transformer.

give information about REM5453 & SPAJ Relays

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what is deffrence between squirral cage and wound rotor in IM?

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Formula to calculate fault current flowing in the neutral line?

1 Answers  

i have one transformer 1000kva, 11/.433kv. we are using 200/5 amp. ct unit for measuring purpose, & one 800 amp. V.C.B Unit for the same t/f operate, i wants to known the primary current of T/F is only 53 amp. why we used 800 amp. V.C.B ? & 200/5 amp. CT Unit.

4 Answers  

What facility we get after CT secondary earthing and how?

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What is Earth Fault and Over current Fault.

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Why we use a shunt capacitor or synchronizing Motor To Improve a Power factor pls reply me in this mail dinesh_elect_eng@yahoo.com

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