Answer / devidas

First symbol/symbols, capital letters: HV winding connection.
Second symbol/symbols, small letters: LV winding connection.
Third symbol, number: Phase displacement expressed as the
clock hour number.

Winding connection designations

High Voltage Always capital letters
Delta - D
Star - S
Interconnected star - Z
Neutral brought out - N

Low voltage Always small letters
Delta - d
Star - s
Interconnected star - z
Neutral brought out - n

Phase displacement
Phase rotation is always anti-clockwise. (international
adopted convention)
Use the hour indicator as the indicating phase displacement
angle. Because there are 12 hours on a clock, and a circle
consists out of 360°, each hour represents 30°.
Thus 1 = 30°, 2 = 60°, 3 = 90°, 6 = 180° and 12 = 0° or 360°.
The minute hand is set on 12 o'clock and replaces the line
to neutral voltage (sometimes imaginary) of the HV winding.
This position is always the reference point.
Because rotation is anti-clockwise, 1 = 30° lagging (LV lags
HV with 30°)and 11 = 330° lagging or 30° leading (LV leads
HV with 30°)

To summarise:
Dyn11
Delta connected HV winding, star connected LV winding with
neutral brought out, LV is leading HV with 30°

Answer / anand

D- delta,Y-star,N-neutral,11-11'O clock position of Phase
angle

Answer / abhinav yadava

Dyn11 is vector group notation of tansformer.It means LV
winding,which is star connected (written in small letters
means LV side and vice versa)is 30 degrees lagging by HV
winding which is delta connected.In India we go for +-30
deg connection of transformer.

Answer / m nazri

D = Delta connection at primary,y = Star connection at
secondary and n = neutral point connected at secondary.
Dyn 11 means that the voltage of the secondary star winding
lead the primary phase voltage by 30 degree and it
corresponds to 11 o'clock.

Answer / gowhar r reshi

Dyn11 ,means lv winding leads the HV winding by 30degree
electrical phase shift.Moreover the secondary is the 3
phase 4 wire system.

Answer / narendran

Dyn11 means the Secondary side winding (Star)lags the
primary side winding (Delta) by 330 Electrical Degrees.

Answer / parth

First symbol/symbols, capital letters: HV winding
connection.
Second symbol/symbols, small letters: LV winding
connection.
Third symbol, number: Phase displacement expressed as the
clock hour number.

Answer / sumit dhar

Dyn11:
D- Delta Connection in HV side. Notice the "D" is written in
Capital letter which means HV connection.

y- Star Connection in LV side. Notice the "y" is written in
small letters which means LV side

n- This represents that the Star side of the transformer is
connected to the ground with the neutral wire. If n is not
there, it means the star side of the transformer is unprotected.

11- represents 11'o clock which is 30 degree angle

other representations are

0- phase displacement is 0 degrees
6- represents 6'o clock position which is 180 degrees.

Answer / natarajan

delta to star neutral postition is 11'o clock

Answer / jay

Dyn11---> DELTA connected HV, STAR connected LV with NEUTRAL out and LV leads HV by 30 degrees.

Why most of analog o/p devices having o/p range 4 to 20 mA and not 0 to 20 mA ?

2 Answers  

what is apparent poewr, reactive power, & active power?

0 Answers  

what is the sweep commenly used 1200mm sweep and 600mmsweep please tell me breifly sweep

1 Answers   Khaitan,

in case dc we mark as + ve & -ve..but in case a.c. we mark as ph&N...Y LIKE PLZ TELL ME

4 Answers   NPTC, TCS,

how to calculate the cable current ratingand and how much of distance the rating will be ok will the distance is incresed what the action we take

0 Answers  

We have 420volts, Diesel gen-sets each 750kva 4nos. we are operating with bus bar duct having 10x150mm for each face 4nos. our question is what is the minimum gap required between each face? is there any satutory regulations?

1 Answers   Alliance One,

As per is what is distance between two chemical type earth pit

2 Answers   DAR, Dr Reddys,

What happen if we re-start H.T motor whose rotor is running at 40% rated speed. Is it will damage motor winding?

1 Answers  

why series motor cannot be started on no-load?

6 Answers  

what is inductance function?

3 Answers  

How to measure power in 2 or 4 or n phase circuit? Please give me a formula.

0 Answers  

how to measure dc earth leakage current?

0 Answers