Answer / akhilesh singh

Due to 60deg phasor diff., PD of two secondaries will
arise. Therefor a circulating current between these two
secondary flows which causes shortcircuiting.

Answer / dubai

I agree with murali.

Transformer having -30˚ angle (here DYn 11) can be
paralleled with +30˚ (here DYn 1) angle by reversing the
phase sequence of both primary & secondary terminals of one
of the transformers eliminating phase angle errors.

Answer / murali

my referance is from jpthomson transfromers
wht ur referance my friend ?

Answer / mrudang

becuase of wrong clock number there is phase difference
and because of phase angle difference it shows negative
sequence

Answer / thatharao

Both the terminals will reverse and Phase displacement will
be zero.So phase angle will be zero.

Answer / ramniveth

dear Murali
my reference is from oxford university from book
name "Automated Technology for verification and analysis"
"http://books.google.co.in/books?
id=LbfOjdII174C&pg=PA111&dq=transformers+oxford+university#P
PA111,M1"

Answer / murali

here phase difference between to secondaries will be 60deg
transformers belonging to dy1 could be operated in parallel
with those of dy11 or viceversa by transposing two of
external high voltage connections of one of the
transformers and also corresponding low voltage external
connections .it is not necessary to change any internal
connections

Answer / ramniveth and subuhani

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

Answer / rishi

delta connected HV winding,star connected LV winding with
neutral brought out,LV IS leading HV with 30degree.

trasnfarmaer core make

0 Answers   MPSEB,

List few applications of d.c series motor?

0 Answers  

Stator of 3-phase IM has 3 slots per pole per phase, calculate number of stator pole pairs. A 1 B 6 C 2 D 3

2 Answers  

Which UPS (inverter) is better and why ? 12 V inverter and 24 V (two 12 V batteries in series) inverter which is better ......... which has the longer backup which has the greater charging time which has the greater discharging time thank you

2 Answers  

What is power factor?

3 Answers   L&T,

how can we select the rating of Load break switch that is connected to the primary protection of 200 kva 11kv/415v distribution transformer?? step by step calculated answr pls...thnk.u

2 Answers   Maruti Suzuki,

The Frequency is measured by _________ bridge ?

3 Answers  

what is meant by PU value ? anyone can you explain briefly to me ?

3 Answers  

What is voltage 

4 Answers  

why would the rotor rotate at sub synchronous speed against the direction of rotating flux when d rotor of 3 phase IM is connected to 3 phase balanced supply and the stator windings are shortcircuited ??

0 Answers  

While testing the 33KV Busbar by using Hipot kit, what should be the test voltage we have to apply?

2 Answers  

AMF (auto mains failure) control for DG sets at home.

1 Answers