What is vector group? What is meant by DYN11?Why is it needed?
Answers were Sorted based on User's Feedback
Answer / avnish
above answers are correct but as u asked shraddha that will
hv lead or lv so i clear that capital D is for secondary and
small forthe primary and again 11 ....means that hv have the
30 degree leading phase diffrence..
Is This Answer Correct ? | 2 Yes | 11 No |
Answer / ghost rider
Abobe two reply explained correctly "what is vector group".
The answer to the last question "why it is needed" is as
follows:-
By virtue of constrction & terminal connections of the
transformer, a difference between primary vector &
secondery vector occurs. We need to know the same for the
following reasons:-
1)Matching of vector group is required (to avoid
circulating current/ fault ), when 2 transformer need to be
operate parallal on a common bus/system.
2) to provide transformer differential protection correctly.
etc
Is This Answer Correct ? | 8 Yes | 18 No |
Answer / strateia
The Dyn11 is interpreted as follows:
D-primary winding is delta connected (i.e the three primary
phase windings within the transformer)
y-the secondary winding is delta connected
11-is a multiplying factor for the phase displacement
between the primary and secondary voltages
i.e. for the Dyn11, phase displacement is
= 11*30degrees
= 330 degrees
Is This Answer Correct ? | 10 Yes | 31 No |
What is on line ups and off line ups?
What is the basic difference between the electrical engineering and electronic engineering?
do we convert single phase line to three phase at minimum cost?
in our transmisison sub station why we step down firstly 132kv\33kv then 33kv to 11kv. can we direct step down 132kv to 11kv.
what is diffrence between neutral and earth wire
23 Answers Bhel, Esab, MTNL,
why and where we use early make & late break contacts in protection?
Why front mounted CT polarities are always towards breaker?
What is meant by reset level of the relay?
role of shunt coil in circuit breakers
WHAT IS DC COMPONENT IN CIRCUIT BREAKER?
why Square root 3 used for three phase?
which is better VCB or ACB and why?