TO operate transformers in parallel, vector symbol of the
both should be same.If one transformer name plate is not
there, how can we conclude that whether the transformer is
having the same vector symbol or not?
Answers were Sorted based on User's Feedback
Answer / guru
Check the vector group by carrying out VECTOR Group testing
( By Injecting a 3 Ph 440v or 230 V to the primary windings
and check the voltage between the terminals in secondary
side)
For each vector group there are standard values which has
to come in the secondary side
Is This Answer Correct ? | 1 Yes | 0 No |
Answer / rajendran
we can easily find out and confirm the vector group of the
transformer by using the standard test procedures.
Is This Answer Correct ? | 3 Yes | 3 No |
This vector group test is done at site 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.
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 ? | 0 Yes | 0 No |
what is the difference between gsm and cdma??
Sir, I have applied for the of Jr.engineer(Electrical & Electronics) & ASST. LOCO PILOT at ALL RRB BOARDS. please send me all RRB Boards solved papers in the year of 2001 tO till date. i requested send me the papers to my id as soon as possible (jet_0991@yahoo.com). (This is very urgent) Thank You,
Brushes are placed at magnetically neutral axis,when brushes reach that point,the armature conductor gets shorted,but it can be seen that the dc supply is also shorted,wont that get damage? help me plz
what is vfd?
How to resolve if Diesel generator stop while running ?
State the factors, for the choice of electrical system for an aero turbine.
Some times to change of DOR of a motor, interchange of R & B is not effected and RYB take same current, but interchange of R&Y is effected ie change the DOR. My doubt is what is the problem in motor and how it is happen.
IF ANY MATERIAL AVAILABLE IN MARKET FOR MOTOR PROTECTION INSTEAD OF OLR & CONTACTOR ?
what is slip resistance? how much its value in 110 kw motor? why voltage is varied in vvvf drive ?
What is safety of Ht panel
Dear sir, How to calculate 3.5 core pvc aluminium armoured cable meter wise,give with best examples.... please help me in this regards....
How star and delta connections inherently eliminate triplend harmonics?