Answer / dinesh kumar

Assumed the transformer vector group is DYn11;
1.1U1V1W-which is primary -Delta Connection
2.2U2V2W- Which is secondary-Star connection
3.join 1U& 2U terminals
4.Supply 1U-1V-1W 440v Measured
a.1U-1V
b.1V-1w
c.1W-1U
d.1W-2W
e.1V-2W
f.1V-2V
g.1W-2V
h.1U-2N
i.1V-2N
TO CHECK
1.1V-2W=1V-2V
2.1W-2V>1W-2W
3.1U-1V=1V-2N+1U-2N
From above check(1,2,3) the vector group of transformer is
verified

Answer / e.saravanan

Assumed the transformer vector group is DYn11;
1.1U1V1W-which is primary -Delta Connection
2.2U2V2W2N- Which is secondary-Star connection
3.By connecting terminals 1U& 2U
4.Then three phase Supply is given to 1U-1V-1W
5.By measuring the terminal given below
We get
a.1U-1V
b.1V-1w
c.1W-1U
d.1W-2W
e.1V-2W
f.1V-2V
g.1W-2V
h.1U-2N
i.1V-2N
THE BELOW GIVEN CONDITION IS SATISFIED THEN DYn11 IS
CONFIRMED
1.1V-2W=1V-2V
2.1W-2V>1W-2W
3.1U-1V=1V-2N+1U-2N

Answer / elangovan

The above method is correct

Answer / sajeesh

wht abt YN d11 transformer...??????

Answer / vinod

Vector group is punched on the name plate based on the user
requirement by the manufacture. Aim of vector group test is
at site is 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 for all vector group of transformer

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

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

Answer / srinivas

can anyone say me hoe to draw vector group and what is the
use of different vector group and its application plz

Answer / adi

Procedure given by Mr. dinesh kumar & Mr. E.saravanan is
correct but is there any explanation for this three
conditions.
1.1V-2W=1V-2V
2.1W-2V>1W-2W
3.1U-1V=1V-2N+1U-2N

Answer / tum

1U-1V=[1U-2N]-[1V-2N]

Answer / prasad talada

1.1U1V1W-which is primary -Delta Connection
2.2U2V2W- Which is secondary-Star connection
3.join 1U& 2U terminals
4.Supply 1U-1V-1W 440v Measured
a.1U-1V
b.1V-1w
c.1W-1U
d.1W-2W
e.1V-2W
f.1V-2V
g.1W-2V
h.1U-2N
i.1V-2N
TO CHECK
1.1V-2W=1V-2V
2.1W-2V>1W-2W
3.1U-1V=1V-2N+1U-2N
From above check(1,2) the vector group of transformer is
verified

Answer / vinay kumar

can anybody tell hw u r writing this is the vector group
calculation for this one.....
what happens if the voltages r not satisfied for the
specified vector group and if so what to do.......

HOW TO CALCULATE LV CABLE SIZING?

2 Answers   L&T, MRF,

Why we Specify Transformer rating 433 V Instead of 415V ?

8 Answers   ABB, ERA, Uddans,

Can we inject more current in ct primary paralleling 2 loading transformers/Injection kit at a time?let ct ratio be (5000/1A)(per kit rating 2000A range),i need to inject 5000A,if this cant b done means wat is d optional?

1 Answers  

for compensate 315mh inductance ,how many capaciance required?

0 Answers   Mitsubishi,

Is there any abbrevation for STUB in Stub bus protection

0 Answers  

Why Stabilising Resistor used in REF circuit ?

0 Answers  

what is difference between isolation and ultra isolation transformer?, what is the method of testing ?

0 Answers  

WHAT IS THE DIFFERENCE BETWEEN GENERAL INVERTER AND SOLOR INVERTER TELL ME PLZ

0 Answers   Epcon,

before synchronizing an alternator,power factor is leading ,why?

0 Answers   CUMI,

which types of relay used in acb and vcb?

0 Answers   IBM,

What is the differance between a converter duty transformer and normal power transformer?

1 Answers   Bhel,

selection of conductor in different voltage?

1 Answers   TATA,