subuhani


{ City } nagercoil
< Country > india
* Profession * elecrical engineer
User No # 24454
Total Questions Posted # 1
Total Answers Posted # 6

Total Answers Posted for My Questions # 2
Total Views for My Questions # 8298

Users Marked my Answers as Correct # 31
Users Marked my Answers as Wrong # 62
Questions / { subuhani }
Questions Answers Category Views Company eMail

In power transformer YnD0 Vector Group is possible or not? if possible, what will be the vector diagram and what are the conditions?

 2 Electrical Engineering 8298



Answers / { subuhani }

Question { Bhilai, 31060 }

11kv/0.433kv, 2 mva , transformer , for protection and
metering how many CT/PT are required?


Answer

hi manjunath,
iread your answer but i dont know what is tertiary winding
plz explain that what is the use of that?

Is This Answer Correct ?    1 Yes 2 No

Question { 21407 }

What is the amount of no load current of 630 kVA tranformer
voltage ratio 11kV/440V ?


Answer

amount of no load current is always 0 what ever the rating
of the trasformer, ratio, etc. no load means there is no
close path. then how can we get the current

Is This Answer Correct ?    3 Yes 39 No


Question { 15716 }

what happen "when Dyn11 is parallel operation with Dyn1"?


Answer

same pottential of two neutral cannot be earthed .because
it give rise to third harmonics.so it cannot be paralleled

Is This Answer Correct ?    7 Yes 11 No

Question { HP, 21723 }

if HT side voltage is high current is low . and LT side
voltage is low current is high please explian.


Answer

in ht side no of turns is high as compered to Lt side, so
voltage is high and current is low where no of trns is
high. voltage is low and current is high where no of turns
is low

Is This Answer Correct ?    12 Yes 8 No

Question { L&T, 5632 }

what is the merz prodution ?
what is the turn to turn fault?


Answer

in high power generetor, stator has 2 windings in each
phase whic r connected in parallel. turn to turn fault
means short between these two windings in a single phase

Is This Answer Correct ?    7 Yes 0 No

Question { 6215 }

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?


Answer

in such acase we can find the vector group by conducting
vector group test the we can proceed

Is This Answer Correct ?    1 Yes 2 No