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WHAT IS THE SIGNIFICANCE OF VECTOR GROUPS IN TRANSFORMER?
WHAT WILL BE EFFECT WHEN PHASE DISPLACEMENT CHANGES IN
TRANSFORMER?
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Answer Posted / sunil ulange hit nidasoshi
Vector Groups are made especially to make out difference in
the connections. The connection can be delta(D) or star(Y)
The primary winding connection always denoted by Capital
Letter (D), and secondary winding connection always denoted
as small letter (y), and neutral n
The number after that indicates the phase difference
between the primary and the secondary voltage.
e.g.-> DYn11 means transformer is star connected with
secondary voltage leading the delta connected primary
voltage by 30 degrees.
normally distribution transformers are have Dyn11 connection
because secondary of transformer are connected to at user
end means motors,inductive load etc,
These loads always havelagging Power factor thatswhy Dyn11
connected transformer means secondary volatage leads by
primry voltage by 30 degrees, hence Power factor maintened
constant.
In Clock 11 indicates angle between 12 & 11 is 30 degrees
i.e. 360/12=30 degree
Sunil ulange
Application Engineer
Southern power equpment Limited bangalore
any Questions @ sunil_031@yahoo.com
| Is This Answer Correct ? | 16 Yes | 11 No |
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