How to take Vector group test of Transformer?
Answers were Sorted based on User's Feedback
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
Is This Answer Correct ? | 225 Yes | 28 No |
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
Is This Answer Correct ? | 121 Yes | 26 No |
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.
Is This Answer Correct ? | 19 Yes | 5 No |
Answer / srinivas
can anyone say me hoe to draw vector group and what is the
use of different vector group and its application plz
Is This Answer Correct ? | 18 Yes | 8 No |
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
Is This Answer Correct ? | 13 Yes | 3 No |
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
Is This Answer Correct ? | 9 Yes | 3 No |
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.......
Is This Answer Correct ? | 7 Yes | 3 No |
State kirchoff current law?
What is Earth Fault and Over current Fault.
why nutral and earthing wire connect with each other in main panel board.?
what is mean by ideal infinite bus? why it is required to consider in fault short circuit calculations?
what is the difference between gsm and cdma??
IF ANY MATERIAL AVAILABLE IN MARKET FOR MOTOR PROTECTION INSTEAD OF OLR & CONTACTOR ?
what is the formula for calculating of dielectric strength of transformer oil.
Hi Friends pls give information regarding BARC written test. am attending by 20-5-2008. mail me to kkumarei@gmail.com or message to 9962122264
WHY HVDC?
we all know that in capacitor there will be no ay physical connection between the two electrodes of the capacitor ,and the charge is stored between these electrodes during charging , so with out any physical connection how these charge is transferred from one plate to the another plate during the discharge?????
by using pump duty, how we will can calculate the motor duty(KW)? is there any standard or formula.
what is meant by reactive power ,active power & real power ? thank you